.page-contact {
  --co-line: rgba(43, 76, 111, 0.22);
  --co-line-soft: rgba(43, 76, 111, 0.12);
  --co-line-dark: rgba(194, 201, 209, 0.26);
  display: block;
}

/* ---------- Hero ---------- */
.page-contact .co-hero__wrap {
  padding-block: clamp(24px, 4vw, 44px) clamp(36px, 6vw, 76px);
}

.page-contact .co-hero__crumb {
  margin-bottom: clamp(20px, 3vw, 34px);
  color: var(--muted-on-ink);
}

.page-contact .co-hero__crumb a {
  color: var(--paper-100);
  text-decoration: none;
}

.page-contact .co-hero__crumb a:hover,
.page-contact .co-hero__crumb a:focus-visible {
  color: var(--gold-500);
}

.page-contact .co-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}

.page-contact .co-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-500);
}

.page-contact .co-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 50px);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--paper-100);
  max-width: 20ch;
}

.page-contact .co-hero__intro {
  margin: 0 0 28px;
  max-width: 44ch;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(247, 243, 234, 0.82);
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .co-hero__aside {
  margin: 20px 0 0;
  font-size: 14px;
  color: var(--muted-on-ink);
}

.page-contact .co-hero__aside a {
  color: var(--paper-200);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .co-hero__aside a:hover,
.page-contact .co-hero__aside a:focus-visible {
  color: var(--gold-500);
}

.page-contact .co-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--co-line-dark);
}

.page-contact .co-hero__link {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num hint";
  align-items: baseline;
  gap: 2px 14px;
  padding: 16px 10px 16px 0;
  border-bottom: 1px solid var(--co-line-dark);
  border-left: 2px solid transparent;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-contact .co-hero__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-500);
  transition: color var(--dur) var(--ease);
}

.page-contact .co-hero__name {
  grid-area: name;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--paper-100);
}

.page-contact .co-hero__hint {
  grid-area: hint;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted-on-ink);
}

.page-contact .co-hero__link:hover,
.page-contact .co-hero__link:focus-visible {
  background-color: rgba(200, 145, 42, 0.08);
  border-left-color: var(--orange-600);
}

.page-contact .co-hero__link:hover .co-hero__num,
.page-contact .co-hero__link:focus-visible .co-hero__num {
  color: var(--orange-600);
}

.page-contact .co-hero__link:focus-visible {
  outline: 2px solid var(--orange-600);
  outline-offset: 2px;
}

/* ---------- 四类方向 ---------- */
.page-contact .co-dir {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 30px;
}

.page-contact .co-dir__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-contact .co-dir__card .st-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-contact .co-dir__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--gray-600);
}

.page-contact .co-dir__gain {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--co-line-soft);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-contact .co-dir__gain span {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 8px;
  border: 1px solid rgba(63, 136, 116, 0.45);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--celadon-500);
}

/* ---------- 流程 ---------- */
.page-contact .co-flow__figure {
  margin: 26px 0 34px;
}

.page-contact .co-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-contact .co-step {
  position: relative;
  padding: 22px 0 22px 26px;
  border-left: 1px solid var(--co-line);
}

.page-contact .co-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 30px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--paper-100);
  border: 2px solid var(--gold-500);
}

.page-contact .co-step:last-child {
  border-left-color: transparent;
}

.page-contact .co-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-500);
  margin-bottom: 8px;
}

.page-contact .co-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink-900);
}

.page-contact .co-step__body {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray-600);
}

.page-contact .co-step__deliver {
  margin: 10px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--gold-500);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-500);
}

@media (hover: hover) and (pointer: fine) {
  .page-contact .co-step__deliver {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease),
      margin-top var(--dur) var(--ease);
  }

  .page-contact .co-step:hover .co-step__deliver,
  .page-contact .co-step:focus-within .co-step__deliver {
    max-height: 220px;
    margin-top: 10px;
    opacity: 1;
  }
}

/* ---------- 机构授权 ---------- */
.page-contact .co-license__wrap {
  padding-block: clamp(46px, 6vw, 78px);
}

.page-contact .co-license__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
  margin-top: 28px;
}

.page-contact .co-license__intro p {
  margin: 0 0 18px;
  max-width: 40ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(247, 243, 234, 0.82);
}

.page-contact .co-license__link {
  margin: 0;
}

.page-contact .co-license__link a {
  display: inline-block;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--gold-500);
  font-size: 15px;
  color: var(--gold-500);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .co-license__link a:hover,
.page-contact .co-license__link a:focus-visible {
  color: var(--orange-600);
  border-color: var(--orange-600);
}

.page-contact .co-license__rows {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .co-license__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--co-line-dark);
}

.page-contact .co-license__row:last-child {
  border-bottom: 1px solid var(--co-line-dark);
}

.page-contact .co-license__row dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--gold-500);
}

.page-contact .co-license__row dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(247, 243, 234, 0.86);
  overflow-wrap: anywhere;
}

/* ---------- 联系渠道 ---------- */
.page-contact .co-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 28px;
}

.page-contact .co-channel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-contact .co-channel__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--celadon-500);
}

.page-contact .co-channel__value {
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--co-line-soft);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .co-channel__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--gray-600);
}

.page-contact .co-channels__figure {
  margin: 34px 0 0;
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 clamp(28px, 4vw, 56px);
  margin-top: 28px;
}

.page-contact .co-faq__item {
  border-top: 1px solid var(--co-line-soft);
  padding: 2px 0;
}

.page-contact .co-faq__q {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 34px 16px 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink-900);
  transition: color var(--dur) var(--ease);
}

.page-contact .co-faq__q::-webkit-details-marker {
  display: none;
}

.page-contact .co-faq__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold-500);
  transition: color var(--dur) var(--ease);
}

.page-contact .co-faq__item[open] .co-faq__q::after {
  content: "\2212";
  color: var(--orange-600);
}

.page-contact .co-faq__q:hover {
  color: var(--orange-600);
}

.page-contact .co-faq__q:focus-visible {
  outline: 2px solid var(--orange-600);
  outline-offset: 2px;
}

.page-contact .co-faq__a {
  padding: 0 26px 18px 0;
}

.page-contact .co-faq__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray-600);
}

.page-contact .co-faq__a a {
  color: var(--ink-700);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--gold-500);
}

.page-contact .co-faq__a a:hover,
.page-contact .co-faq__a a:focus-visible {
  color: var(--orange-600);
  text-decoration-color: var(--orange-600);
}

/* ---------- 结尾行动区 ---------- */
.page-contact .co-cta__wrap {
  padding-block: clamp(46px, 6vw, 84px);
}

.page-contact .co-cta__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-500);
}

.page-contact .co-cta__title {
  margin: 0 0 18px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--paper-100);
}

.page-contact .co-cta__body {
  margin: 0 0 28px;
  max-width: 46ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(247, 243, 234, 0.8);
}

.page-contact .co-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-contact .co-dir {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-contact .co-license__row {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

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

@media (min-width: 960px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-contact .co-hero__index {
    margin-top: 8px;
  }

  .page-contact .co-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-step {
    padding: 30px 24px 0 0;
    border-left: 0;
    border-top: 1px solid var(--co-line);
  }

  .page-contact .co-step::before {
    left: 0;
    top: -5px;
  }

  .page-contact .co-step:last-child {
    border-left-color: transparent;
  }

  .page-contact .co-step__body {
    max-width: 30ch;
  }

  .page-contact .co-license__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-contact .co-hero h1 {
    max-width: 22ch;
  }

  .page-contact .co-step {
    padding-right: 34px;
  }
}