.page-contact {
  --c-gap: 24px;
  --c-hairstrong: rgba(27, 58, 49, 0.3);
}

/* ============ 首屏 ============ */
.page-contact .c-hero {
  background: var(--paper);
  padding: calc(var(--header-h) + 32px) 0 52px;
  border-bottom: 1px solid var(--hair);
}

.page-contact .c-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-contact .c-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--t12);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .c-label::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--flare);
  flex: none;
}

.page-contact .c-label--dark {
  color: var(--cyan);
}

.page-contact .c-label--dark::before {
  background: var(--cyan);
}

.page-contact h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 7.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 18ch;
}

.page-contact .lede {
  margin: 0;
  font-size: var(--t16);
  line-height: 1.75;
  color: var(--muted);
  max-width: 64ch;
}

.page-contact .section--dark .lede {
  color: var(--paper-72);
}

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

/* 面包屑微调 */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
  font-size: var(--t14);
  color: var(--muted);
}

.page-contact .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--c-hairstrong);
}

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

/* 页内目录 */
.page-contact .c-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-contact .c-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--t12);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .c-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-contact .c-index__list li {
  border-bottom: 1px solid var(--hair);
}

.page-contact .c-index__list a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 12px 2px;
  font-size: var(--t14);
  color: var(--text);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-contact .c-index__list a:hover,
.page-contact .c-index__list a:focus-visible {
  color: var(--flare);
  padding-left: 8px;
}

.page-contact .c-index__list .mono {
  color: var(--muted);
  font-size: var(--t12);
  letter-spacing: 0.08em;
}

/* ============ 章节头 ============ */
.page-contact .c-sechead h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 22ch;
}

.page-contact .section--dark .c-sechead h2 {
  color: var(--paper);
}

/* ============ 深色通道区 ============ */
.page-contact .c-channels {
  background: var(--ink-900);
}

.page-contact .c-banner {
  margin: 34px 0 44px;
  border-top: 1px solid var(--hair-dark);
  border-bottom: 1px solid var(--hair-dark);
}

.page-contact .c-banner img {
  display: block;
  width: 100%;
  height: clamp(180px, 40vw, 320px);
  object-fit: cover;
  opacity: 0.7;
}

.page-contact .c-chans {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair-dark);
  border: 1px solid var(--hair-dark);
}

.page-contact .c-chan {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 22px 30px;
  background: var(--ink-800);
}

.page-contact .c-chan--primary::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--flare);
}

.page-contact .c-chan__icon {
  display: block;
  margin-bottom: 22px;
  color: var(--cyan);
}

.page-contact .c-chan__name {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--t20);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .c-chan__value {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.6vw, 1.0625rem);
  letter-spacing: 0.02em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .c-chan__desc {
  margin: 0 0 20px;
  font-size: var(--t14);
  line-height: 1.75;
  color: var(--paper-72);
}

.page-contact .c-chan__tag {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--hair-dark);
  font-family: var(--font-mono);
  font-size: var(--t12);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .c-chan--primary .c-chan__tag {
  color: var(--flare);
}

.page-contact .c-chan__link {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--hair-dark);
  font-size: var(--t14);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: none;
}

.page-contact .c-chan__link:hover,
.page-contact .c-chan__link:focus-visible {
  text-decoration: underline;
}

/* ============ 响应时效 ============ */
.page-contact .c-sla {
  background: var(--mist);
}

.page-contact .c-clock {
  margin: 36px 0 44px;
}

.page-contact .c-clock__bar {
  position: relative;
  height: 16px;
  background: var(--ink-900);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .c-clock__track {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.page-contact .c-clock__track span {
  border-right: 1px solid var(--hair-dark);
}

.page-contact .c-clock__track span:last-child {
  border-right: 0;
}

.page-contact .c-clock__fill {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(56, 242, 208, 0.82) 0%, rgba(56, 242, 208, 0.16) 100%);
}

.page-contact .c-clock__scale {
  display: flex;
  justify-content: space-between;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--t12);
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-contact .c-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-contact .c-note {
  padding-top: 20px;
  border-top: 2px solid var(--ink-800);
}

.page-contact .c-note h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--t20);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .c-note p {
  margin: 0;
  font-size: var(--t16);
  line-height: 1.75;
  color: var(--muted);
}

/* ============ 来信要附什么 ============ */
.page-contact .c-letter {
  background: var(--paper);
}

.page-contact .c-letter__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-contact .c-letter__col {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-contact .c-letter__col h3 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--t20);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .c-letter__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .c-letter__list li {
  position: relative;
  padding: 0 0 14px 22px;
  font-size: var(--t16);
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .c-letter__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 1px;
  background: var(--flare);
}

.page-contact .c-letter__list li:last-child {
  padding-bottom: 0;
}

/* ============ 常见联系场景 ============ */
.page-contact .c-scenes {
  background: var(--mist);
}

.page-contact .c-scenes__list {
  border-top: 1px solid var(--line);
}

.page-contact .c-scene {
  border-bottom: 1px solid var(--line);
}

.page-contact .c-scene summary {
  position: relative;
  display: block;
  padding: 18px 42px 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--t16);
  line-height: 1.5;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-contact .c-scene summary::-webkit-details-marker {
  display: none;
}

.page-contact .c-scene summary:hover {
  color: var(--flare);
}

.page-contact .c-scene summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: var(--t20);
  color: var(--muted);
}

.page-contact .c-scene[open] summary::after {
  content: "\2013";
  color: var(--flare);
}

.page-contact .c-scene__body {
  padding: 2px 0 22px;
}

.page-contact .c-scene__body p {
  margin: 0 0 12px;
  font-size: var(--t14);
  line-height: 1.75;
  color: var(--muted);
  max-width: 58ch;
}

.page-contact .c-scene__meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 6px 12px;
  border: 1px solid var(--steel);
  font-size: var(--t12);
  color: var(--text);
}

.page-contact .c-scene__meta .mono {
  font-size: var(--t12);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .c-scenes__fig {
  margin: 0;
}

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

.page-contact .c-scenes__fig figcaption {
  margin-top: 16px;
  padding-left: 14px;
  border-left: 2px solid var(--flare);
  font-size: var(--t14);
  line-height: 1.7;
  color: var(--muted);
}

/* ============ 提交前自查 ============ */
.page-contact .c-check {
  background: var(--paper);
}

.page-contact .c-check__list {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .c-check__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .c-check__box {
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  background: var(--steel);
  border: 1px solid var(--line);
}

.page-contact .c-check__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 7px;
  height: 12px;
  border-right: 2px solid var(--ink-800);
  border-bottom: 2px solid var(--ink-800);
  transform: rotate(42deg);
}

.page-contact .c-check__text h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--t20);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .c-check__text p {
  margin: 0;
  font-size: var(--t16);
  line-height: 1.75;
  color: var(--muted);
  max-width: 62ch;
}

/* ============ 办公地址与备案 ============ */
.page-contact .c-office {
  background: var(--ink-900);
}

.page-contact .c-office__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair-dark);
  border: 1px solid var(--hair-dark);
}

.page-contact .c-office__item {
  padding: 22px 20px 26px;
  background: var(--ink-800);
}

.page-contact .c-office__k {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--t12);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .c-office__v {
  margin: 0;
  font-size: var(--t16);
  line-height: 1.65;
  color: var(--paper);
}

.page-contact .c-office__v.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

.page-contact .c-office__foot {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--hair-dark);
}

.page-contact .c-office__foot p {
  margin: 0;
  font-size: var(--t14);
  line-height: 1.8;
  color: var(--paper-52);
  max-width: 78ch;
}

.page-contact .c-office__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 208, 0.34);
}

.page-contact .c-office__foot a:hover,
.page-contact .c-office__foot a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ============ 断点 ============ */
@media (min-width: 700px) {
  .page-contact .c-letter__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 44px;
  }

  .page-contact .c-check__item {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 24px;
    padding: 30px 0;
  }

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

@media (min-width: 860px) {
  .page-contact .c-chans {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .c-chan {
    padding: 32px 26px 36px;
  }
}

@media (min-width: 900px) {
  .page-contact .c-hero {
    padding: calc(var(--header-h) + 48px) 0 68px;
  }

  .page-contact .c-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 64px;
    align-items: end;
  }

  .page-contact .c-split--even,
  .page-contact .c-split--5-7,
  .page-contact .c-split--7-5 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 56px;
  }

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

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

  .page-contact .c-letter__col:first-child {
    border-top-color: var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .c-index__list a,
  .page-contact .c-scene summary {
    transition: none;
  }
}
</final>