.page-contact {
  --ch: var(--coral);
  --contact-line: rgba(11, 15, 18, 0.1);
  background: var(--porcelain);
  color: var(--ink);
  overflow-x: hidden;
}

.page-contact .container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(14, 110, 117, 0.55) 0%, rgba(6, 59, 68, 0) 62%),
    var(--deep);
  color: var(--porcelain);
  padding-block: clamp(96px, 14vw, 150px) clamp(48px, 8vw, 88px);
  overflow: hidden;
}

.page-contact .contact-hero-inner {
  position: relative;
  z-index: 2;
}

.page-contact .contact-orbits {
  position: absolute;
  inset: auto -60px -70px auto;
  display: flex;
  gap: 18px;
  transform: rotate(-6deg);
  opacity: 0.55;
  pointer-events: none;
}

.page-contact .orb {
  display: block;
  width: clamp(58px, 11vw, 104px);
  height: clamp(58px, 11vw, 104px);
  border-radius: 50%;
}

.page-contact .orb--gold { background: var(--gold); }
.page-contact .orb--mint { background: var(--mint); }
.page-contact .orb--coral { background: var(--coral); }
.page-contact .orb--salt { background: rgba(247, 243, 234, 0.14); }

.page-contact .contact-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  margin-bottom: clamp(24px, 5vw, 44px);
}

.page-contact .contact-crumb a {
  color: var(--porcelain);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-contact .contact-crumb a:hover,
.page-contact .contact-crumb a:focus-visible {
  border-bottom-color: var(--coral);
}

.page-contact .crumb-sep { color: rgba(247, 243, 234, 0.4); }

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-contact .contact-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  font-size: clamp(30px, 6.6vw, 58px);
  margin: 14px 0 18px;
  max-width: 15em;
}

.page-contact .contact-hero-copy .lede {
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.86);
  max-width: 34em;
  margin: 0;
}

.page-contact .contact-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .contact-hero-actions .btn-line {
  border-color: rgba(247, 243, 234, 0.5);
  color: var(--porcelain);
}

.page-contact .contact-quick {
  background: rgba(247, 243, 234, 0.07);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-card);
  padding: 22px 20px 10px;
  backdrop-filter: blur(2px);
}

.page-contact .quick-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mint);
  margin: 0 0 14px;
}

.page-contact .quick-list { margin: 0; }

.page-contact .quick-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(247, 243, 234, 0.16);
}

.page-contact .quick-row:last-child { border-bottom: 0; }

.page-contact .quick-row dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact .quick-row dd {
  margin: 0;
  font-size: 14px;
  color: var(--porcelain);
  word-break: break-word;
}

/* ---------- 章节公共头 ---------- */
.page-contact .contact-sec-head {
  max-width: 44em;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-contact .contact-sec-head h2,
.page-contact .contact-detail-main h2,
.page-contact .contact-close h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.18;
  font-size: clamp(24px, 4.2vw, 40px);
  margin: 10px 0 14px;
}

.page-contact .contact-sec-lede {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(11, 15, 18, 0.72);
  margin: 0;
}

/* ---------- 三通道 ---------- */
.page-contact .contact-channels { padding-block: clamp(56px, 8vw, 96px); }

.page-contact .contact-media {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--deep);
  box-shadow: 0 30px 60px -46px rgba(6, 59, 68, 0.9);
}

.page-contact .contact-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .channel-card {
  position: relative;
  background: var(--salt);
  border: 1px solid var(--contact-line);
  border-radius: var(--radius-card);
  padding: 28px 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 22px 40px -38px rgba(6, 59, 68, 0.85);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  width: 52px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--ch);
}

.page-contact .channel-card--coral { --ch: var(--coral); }
.page-contact .channel-card--gold { --ch: var(--gold); }
.page-contact .channel-card--mint { --ch: var(--mint); }

.page-contact .ch-idx {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(11, 15, 18, 0.45);
  margin: 0;
}

.page-contact .channel-card h3 {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-contact .ch-text {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(11, 15, 18, 0.74);
  margin: 0;
}

.page-contact .ch-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .ch-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-contact .ch-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ch);
}

.page-contact .ch-foot {
  margin-top: auto;
  padding-top: 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(11, 15, 18, 0.55);
}

/* ---------- 联系方式 ---------- */
.page-contact .contact-detail {
  background: var(--salt);
  padding-block: clamp(52px, 8vw, 92px);
  border-top: 1px solid var(--contact-line);
  border-bottom: 1px solid var(--contact-line);
}

.page-contact .contact-detail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-contact .contact-table {
  margin: 26px 0 0;
  border-top: 1px solid var(--contact-line);
}

.page-contact .contact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--contact-line);
}

.page-contact .contact-row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-contact .contact-row dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  word-break: break-word;
}

.page-contact .contact-detail .note {
  margin-top: 24px;
  padding: 14px 16px;
  background: var(--porcelain);
  border-left: 3px solid var(--gold);
  border-radius: 0 12px 12px 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(11, 15, 18, 0.78);
}

.page-contact .contact-side-media {
  margin: 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--deep);
}

.page-contact .contact-side-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.page-contact .side-note {
  margin-top: 16px;
  padding: 20px;
  border: 1px dashed rgba(6, 59, 68, 0.28);
  border-radius: var(--radius-card);
}

.page-contact .side-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--coral-dark);
  margin: 0 0 10px;
}

.page-contact .side-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(11, 15, 18, 0.76);
}

/* ---------- 合作方向 ---------- */
.page-contact .contact-coop { padding-block: clamp(56px, 8vw, 96px); }

.page-contact .coop-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 clamp(24px, 4vw, 38px);
  padding: 0;
}

.page-contact .coop-tags .tag {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid rgba(6, 59, 68, 0.3);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--deep);
  background: transparent;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-contact .coop-tags li:hover .tag {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--porcelain);
}

.page-contact .coop-list {
  display: grid;
  gap: 10px;
}

.page-contact .coop-item {
  background: var(--salt);
  border: 1px solid var(--contact-line);
  border-radius: 14px;
  overflow: hidden;
}

.page-contact .coop-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
}

.page-contact .coop-item summary::-webkit-details-marker { display: none; }

.page-contact .coop-item summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: -2px;
}

.page-contact .coop-i {
  font-size: 12px;
  color: var(--coral-dark);
  letter-spacing: 0.1em;
}

.page-contact .coop-name { flex: 1 1 auto; }

.page-contact .coop-cue {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--teal);
  border-bottom: 1px solid var(--mint);
}

.page-contact .coop-item[open] .coop-cue { color: var(--coral-dark); border-bottom-color: var(--coral); }

.page-contact .coop-item p {
  margin: 0;
  padding: 0 18px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 15, 18, 0.76);
  max-width: 62ch;
}

.page-contact .coop-more {
  margin: clamp(22px, 4vw, 32px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 15, 18, 0.72);
}

.page-contact .coop-more a,
.page-contact .qa-item a {
  color: var(--deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--mint);
}

.page-contact .coop-more a:hover,
.page-contact .qa-item a:hover { border-bottom-color: var(--coral); }

/* ---------- 处理节奏 ---------- */
.page-contact .contact-rhythm {
  background: var(--deep);
  color: var(--porcelain);
  padding-block: clamp(52px, 8vw, 92px);
}

.page-contact .contact-rhythm .contact-sec-head h2 { color: var(--porcelain); }
.page-contact .contact-rhythm .contact-sec-lede { color: rgba(247, 243, 234, 0.78); }
.page-contact .contact-rhythm .eyebrow { color: var(--gold); }

.page-contact .rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .rhythm-step {
  position: relative;
  padding-left: 24px;
  border-left: 2px solid rgba(247, 243, 234, 0.2);
}

.page-contact .rhythm-dot {
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 107, 74, 0.18);
}

.page-contact .rhythm-tag {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.page-contact .rhythm-step h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-contact .rhythm-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.8);
}

.page-contact .contact-qa {
  margin-top: clamp(36px, 6vw, 60px);
  padding-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid rgba(247, 243, 234, 0.18);
}

.page-contact .qa-title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  margin: 0 0 16px;
}

.page-contact .qa-item {
  border-bottom: 1px solid rgba(247, 243, 234, 0.16);
}

.page-contact .qa-item summary {
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--porcelain);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-contact .qa-item summary::-webkit-details-marker { display: none; }

.page-contact .qa-item summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--coral);
  font-size: 15px;
}

.page-contact .qa-item[open] summary::before { content: "–"; }

.page-contact .qa-item summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

.page-contact .qa-item p {
  margin: 0 0 18px;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.78);
  max-width: 62ch;
}

.page-contact .qa-item a { color: var(--porcelain); }

/* ---------- 收束 ---------- */
.page-contact .contact-close {
  background: var(--porcelain);
  padding-block: clamp(44px, 7vw, 76px);
  border-top: 4px solid var(--coral);
}

.page-contact .contact-close-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
}

.page-contact .contact-close h2 { margin-top: 0; }

.page-contact .contact-close p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 15, 18, 0.74);
  max-width: 46ch;
}

.page-contact .contact-close-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-contact .contact-row {
    grid-template-columns: 148px 1fr;
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .channel-grid { gap: 18px; }
  .page-contact .contact-quick { padding: 26px 24px 14px; }
}

@media (min-width: 860px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.75fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-contact .contact-orbits { inset: auto -40px -50px auto; }

  .page-contact .channel-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

  .page-contact .channel-card--gold { transform: translateY(20px); }

  .page-contact .contact-detail-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-contact .rhythm {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .rhythm-step {
    padding-left: 0;
    padding-top: 26px;
    border-left: 0;
    border-top: 2px solid rgba(247, 243, 234, 0.2);
  }

  .page-contact .rhythm-dot { left: 0; top: -7px; }

  .page-contact .contact-close-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 32px;
  }
}

@media (min-width: 1180px) {
  .page-contact .coop-list { grid-template-columns: 1fr; }
  .page-contact .contact-quick { position: sticky; top: 96px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-tags .tag { transition: none; }
  .page-contact .channel-card--gold { transform: none; }
}