.page-contact {
  --contact-accent-mail: var(--cyan-signal);
  --contact-accent-phone: var(--orange-volt);
  --contact-accent-post: var(--amber-tick);
}

.page-contact .crumbs {
  margin-top: clamp(18px, 3vw, 36px);
}

.page-contact .contact-masthead {
  padding-top: clamp(22px, 3.6vw, 44px);
}

.page-contact .contact-masthead h1 {
  margin: 10px 0 16px;
  max-width: 22ch;
  font-size: clamp(2rem, 5.2vw, 3.5rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-contact .contact-masthead-lead {
  max-width: 46em;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
}

/* ---------- 三种对接方式 ---------- */

.page-contact .ways-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.page-contact .ways-figure .media-frame {
  max-width: 460px;
}

.page-contact .ways-head h2 {
  margin: 8px 0 10px;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-contact .ways-head p {
  max-width: 40em;
  color: var(--text-on-dark-muted);
}

.page-contact .channel-stack {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .channel-card {
  --accent: var(--contact-accent-mail);
  padding: 5px;
  background: var(--blue-glass);
  border: 1px solid var(--line-dark);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-contact .channel-card--mail {
  --accent: var(--contact-accent-mail);
}

.page-contact .channel-card--phone {
  --accent: var(--contact-accent-phone);
}

.page-contact .channel-card--post {
  --accent: var(--contact-accent-post);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 12px 30px rgba(5, 18, 31, 0.52);
}

.page-contact .channel-inner {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ink-abyss);
  border-radius: 2px;
}

.page-contact .channel-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.page-contact .channel-dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
}

.page-contact .channel-top h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-on-dark);
}

.page-contact .channel-value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.15vw + 0.68rem, 1.3rem);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--text-on-dark);
  overflow-wrap: anywhere;
}

.page-contact .channel-value--addr {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.8vw + 0.82rem, 1.15rem);
  letter-spacing: 0.02em;
}

.page-contact .channel-text {
  margin: 0;
  max-width: 44em;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-on-dark-muted);
}

/* ---------- 提交清单 ---------- */

.page-contact .checklist-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-contact .checklist-intro h2 {
  margin: 8px 0 12px;
  font-size: clamp(1.5rem, 2.8vw, 2.05rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
}

.page-contact .checklist-intro p {
  color: var(--text-on-dark-muted);
  max-width: 34em;
}

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

.page-contact .check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 20px;
  background: var(--paper);
  color: var(--text-strong);
  border-radius: var(--radius);
  border-left: 3px solid var(--paper-alt);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .check-item:hover {
  transform: translateX(2px);
  border-left-color: var(--orange-volt);
}

.page-contact .check-box {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 2px solid var(--blue-mid);
  border-radius: 2px;
}

.page-contact .check-box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 6px;
  height: 11px;
  border-right: 2px solid var(--orange-volt);
  border-bottom: 2px solid var(--orange-volt);
  transform: rotate(42deg);
}

.page-contact .check-item h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-strong);
}

.page-contact .check-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ---------- 回复节奏 ---------- */

.page-contact .rhythm-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-contact .rhythm-main h2 {
  margin: 8px 0 12px;
  font-size: clamp(1.5rem, 2.8vw, 2.05rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
}

.page-contact .rhythm-main p {
  max-width: 42em;
  color: var(--text-on-dark-muted);
}

.page-contact .clock-strip {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .clock-strip::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-signal), var(--orange-volt));
  opacity: 0.55;
}

.page-contact .clock-strip li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 24px;
  padding-right: 8px;
}

.page-contact .clock-tick {
  position: absolute;
  top: 0;
  left: 0;
  box-sizing: border-box;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--blue-deep);
  border: 2px solid var(--cyan-signal);
}

.page-contact .clock-strip li:last-child .clock-tick {
  border-color: var(--orange-volt);
}

.page-contact .clock-num {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--cyan-signal);
}

.page-contact .clock-tag {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--text-on-dark-muted);
}

.page-contact .rhythm-figure {
  margin: 0;
}

/* ---------- 合作方向 ---------- */

.page-contact .section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 8px 0 12px;
}

.page-contact .section-head .lead {
  max-width: 44em;
  color: var(--text-on-dark-muted);
}

.page-contact .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-contact .partner-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 28px);
}

.page-contact .partner-index {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--orange-volt);
}

.page-contact .partner-card h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-contact .partner-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-on-dark-muted);
}

/* ---------- 先看这里 ---------- */

.page-contact .pre-panel {
  padding: clamp(24px, 4vw, 44px);
  border-top: 2px solid var(--cyan-signal);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(11, 47, 82, 0.92), rgba(5, 18, 31, 0.97));
}

.page-contact .pre-panel h2 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .pre-panel > p {
  margin: 0;
  max-width: 46em;
  color: var(--text-on-dark-muted);
}

.page-contact .pre-links {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .pre-links a {
  display: inline-block;
  padding-bottom: 2px;
  color: var(--text-on-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--line-dark);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .pre-links a:hover {
  color: var(--cyan-signal);
  border-bottom-color: var(--cyan-signal);
}

.page-contact .pre-links a:focus-visible {
  outline: 2px solid var(--cyan-signal);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .contact-ways .ways-figure .media-frame {
    max-width: 520px;
  }
}

@media (min-width: 900px) {
  .page-contact .checklist-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
  }

  .page-contact .rhythm-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 960px) {
  .page-contact .ways-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
  }

  .page-contact .ways-figure {
    position: sticky;
    top: 120px;
  }
}

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

@media (max-width: 520px) {
  .page-contact .clock-strip li {
    padding-right: 4px;
  }

  .page-contact .clock-tag {
    font-size: 0.7rem;
    letter-spacing: 0;
  }

  .page-contact .check-item {
    padding: 14px 16px;
    gap: 12px;
  }
}