.page-contact {
  --contact-panel: var(--ink-mid);
  --contact-hair: var(--line-soft);
  --contact-shadow: 0 18px 40px rgba(6, 26, 20, 0.45);
}

.page-contact .breadcrumb {
  margin-top: clamp(1rem, 3vw, 1.9rem);
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(1rem, 3vw, 1.6rem);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-contact .contact-hero__panel h1 {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 7.4vw, 3.9rem);
  line-height: 1.03;
  letter-spacing: -0.012em;
  color: var(--warm);
  max-width: 22ch;
}

.page-contact .contact-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 58ch;
  font-size: 1.04rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .contact-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__facts li {
  border-top: 1px solid var(--line);
  padding-top: 0.75rem;
}

.page-contact .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.8vw, 1.5rem);
  letter-spacing: 0.02em;
  color: var(--flame);
}

.page-contact .fact-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-contact .contact-hero__media {
  margin: 1.7rem 0 0;
}

/* 渠道坐标 */
.page-contact .contact-coords {
  align-self: start;
  padding: clamp(1.1rem, 3vw, 1.7rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, var(--ink-mid) 0%, var(--ink-night) 88%);
  box-shadow: var(--contact-shadow);
}

.page-contact .contact-coords__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--warm);
}

.page-contact .contact-coords__lede {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .coord-list {
  display: grid;
  gap: 0.7rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .coord-card {
  position: relative;
  padding: 0.95rem 1rem 0.95rem 1.3rem;
  border: 1px solid var(--contact-hair);
  border-radius: var(--r-md);
  background: rgba(6, 26, 20, 0.42);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-contact .coord-card:hover,
.page-contact .coord-card:focus-within {
  border-color: var(--flame);
  transform: translateY(-2px);
}

.page-contact .coord-card::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  border-radius: 3px;
  background: var(--flame);
}

.page-contact .coord-card__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--volt);
}

.page-contact .coord-card__label {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-contact .coord-card__value {
  margin: 0.4rem 0 0;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--warm);
  word-break: break-word;
}

.page-contact .coord-card__value--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}

.page-contact .coord-card__note {
  margin: 0.5rem 0 0;
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-contact .coord-reveal {
  margin-top: 0.4rem;
}

.page-contact .coord-reveal summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.86rem;
  color: var(--volt);
}

.page-contact .coord-reveal summary::-webkit-details-marker {
  display: none;
}

.page-contact .coord-reveal summary::before {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.page-contact .coord-reveal[open] summary::before {
  content: "－";
}

.page-contact .contact-coords__foot {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--contact-hair);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .contact-coords__foot a {
  color: var(--volt);
}

/* ---------- 区块标题 ---------- */
.page-contact .contact-sec-head {
  max-width: 62ch;
  margin-bottom: clamp(1.3rem, 3vw, 2rem);
}

.page-contact .contact-sec-head h2 {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.1;
  letter-spacing: -0.008em;
  color: var(--warm);
}

.page-contact .contact-sec-head__lede {
  margin: 0.7rem 0 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 合作方向 ---------- */
.page-contact .track-grid {
  display: grid;
  gap: 1rem;
}

.page-contact .track-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: clamp(1.15rem, 2.6vw, 1.8rem);
  border: 1px solid var(--contact-hair);
  border-radius: var(--r-lg);
  background: var(--contact-panel);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-contact .track-card:hover,
.page-contact .track-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--flame);
  box-shadow: var(--contact-shadow);
}

.page-contact .track-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.page-contact .track-card__idx {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  letter-spacing: 0.06em;
  color: var(--line-volt);
}

.page-contact .track-card h3 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2.4vw, 1.35rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--warm);
}

.page-contact .track-card__scope {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .track-card__meta {
  display: grid;
  grid-template-columns: 4.9rem minmax(0, 1fr);
  gap: 0.35rem 0.85rem;
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
}

.page-contact .track-card__meta dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding-top: 0.22rem;
  color: var(--volt);
}

.page-contact .track-card__meta dd {
  margin: 0;
  line-height: 1.65;
  color: var(--warm);
}

.page-contact .track-card__extra {
  margin: 0.3rem 0 0;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--contact-hair);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .track-card__link {
  margin-top: auto;
  padding-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--flame);
  text-decoration: none;
}

.page-contact .track-card__link::after {
  content: " →";
}

.page-contact .track-card__link:hover {
  color: var(--flame-mist);
  text-decoration: underline;
}

@media (hover: hover) and (min-width: 900px) {
  .page-contact .track-card__extra {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    border-top-color: transparent;
    overflow: hidden;
    transition: max-height 0.24s var(--ease), opacity 0.24s var(--ease), padding-top 0.24s var(--ease);
  }

  .page-contact .track-card:hover .track-card__extra,
  .page-contact .track-card:focus-within .track-card__extra {
    max-height: 12rem;
    opacity: 1;
    padding-top: 0.7rem;
    border-top-color: var(--contact-hair);
  }
}

/* ---------- 咨询准备 ---------- */
.page-contact .contact-brief__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-contact .brief-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .brief-step {
  display: grid;
  grid-template-columns: 2.7rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--contact-hair);
}

.page-contact .brief-step__num {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  padding-top: 0.2rem;
  color: var(--flame);
}

.page-contact .brief-step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--warm);
}

.page-contact .brief-step p {
  margin: 0.35rem 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .contact-brief__media {
  margin: 0;
}

/* ---------- 响应节奏 ---------- */
.page-contact .flow-list {
  display: grid;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow-step {
  position: relative;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--flame);
}

.page-contact .flow-step:nth-child(2)::before {
  background: var(--flame-mist);
}

.page-contact .flow-step:nth-child(3)::before {
  background: var(--volt);
}

.page-contact .flow-step:nth-child(4)::before {
  background: var(--warm);
}

.page-contact .flow-step__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--volt);
}

.page-contact .flow-step h3 {
  margin: 0.45rem 0 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--warm);
}

.page-contact .flow-step p {
  margin: 0.4rem 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 伙伴对接 ---------- */
.page-contact .partner-routes {
  border-bottom: 1px solid var(--contact-hair);
}

.page-contact .partner-row {
  display: grid;
  gap: 0.5rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--contact-hair);
  transition: background-color 0.2s var(--ease);
}

.page-contact .partner-row:hover {
  background: rgba(31, 107, 82, 0.12);
}

.page-contact .partner-row__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--flame);
}

.page-contact .partner-row__text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .partner-row__link {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid var(--line-volt);
  padding-bottom: 0.15rem;
}

.page-contact .partner-row__link:hover {
  color: var(--warm);
  border-bottom-color: var(--flame);
}

.page-contact .feedback-note {
  margin: 1.4rem 0 0;
  padding: 0.9rem 1rem 0.9rem 1.2rem;
  border-left: 3px solid var(--flame);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(255, 107, 26, 0.08);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--warm);
}

/* ---------- 常见问题 ---------- */
.page-contact .contact-faq__grid {
  display: grid;
  gap: 0.7rem;
}

.page-contact .faq-item {
  border: 1px solid var(--contact-hair);
  border-radius: var(--r-md);
  background: rgba(20, 73, 58, 0.42);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .faq-item:hover,
.page-contact .faq-item[open] {
  border-color: var(--line-volt);
  background: rgba(20, 73, 58, 0.7);
}

.page-contact .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--warm);
}

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

.page-contact .faq-item summary::before {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--flame);
}

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

.page-contact .faq-body {
  padding: 0 1.1rem 1.05rem 2.75rem;
}

.page-contact .faq-body p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    column-gap: clamp(1.6rem, 3.4vw, 3rem);
    align-items: start;
  }

  .page-contact .contact-coords {
    position: sticky;
    top: calc(var(--bar-h) + 1.5rem);
  }

  .page-contact .track-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2vw, 1.75rem);
    row-gap: 1.4rem;
  }

  .page-contact .track-card:nth-child(1) {
    grid-column: 1 / span 6;
  }

  .page-contact .track-card:nth-child(2) {
    grid-column: 7 / span 6;
    margin-top: 2.2rem;
  }

  .page-contact .track-card:nth-child(3) {
    grid-column: 2 / span 7;
    margin-top: 0.4rem;
  }

  .page-contact .contact-brief__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-contact .flow-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(1rem, 2vw, 1.6rem);
  }

  .page-contact .partner-row {
    grid-template-columns: 10.5rem minmax(0, 1fr) auto;
    align-items: center;
    column-gap: clamp(1.2rem, 2.6vw, 2rem);
    padding: 1.25rem 0.85rem;
  }

  .page-contact .partner-row__link {
    justify-self: end;
    white-space: nowrap;
  }

  .page-contact .contact-faq__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem clamp(1rem, 2vw, 1.6rem);
  }
}

@media (min-width: 1180px) {
  .page-contact .contact-hero__panel h1 {
    max-width: 20ch;
  }

  .page-contact .contact-brief__media {
    margin-top: 2.6rem;
  }
}