.page-contact {
  --pc-mist: #EDF3F8;
  --pc-card: #FFFFFF;
  --pc-shadow: 0 26px 60px -42px rgba(8, 25, 43, .6);
  overflow-x: hidden;
}

/* ---------- 首屏联系信息条 ---------- */
.page-contact .contact-band {
  position: relative;
  isolation: isolate;
  background: var(--abyss-900);
  color: var(--paper-50);
  padding: var(--space-4) 0 var(--space-5);
}

.page-contact .contact-band::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -34%;
  right: -18%;
  width: 62%;
  height: 150%;
  background: radial-gradient(circle at 34% 40%, rgba(35, 224, 196, .20), rgba(35, 224, 196, 0) 64%);
  border-radius: 50%;
  pointer-events: none;
}

.page-contact .contact-band::after {
  content: "";
  position: absolute;
  z-index: -1;
  bottom: -46%;
  left: -12%;
  width: 46%;
  height: 90%;
  background: radial-gradient(circle at 50% 50%, rgba(255, 122, 69, .14), rgba(255, 122, 69, 0) 68%);
  border-radius: 50%;
  pointer-events: none;
}

.page-contact .contact-band__inner {
  position: relative;
}

.page-contact .contact-band .crumbs {
  margin-bottom: var(--space-3);
}

.page-contact .contact-band .crumbs a {
  color: var(--chart-300);
  text-decoration: none;
}

.page-contact .contact-band .crumbs a:hover,
.page-contact .contact-band .crumbs a:focus-visible {
  color: var(--signal-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-band .eyebrow {
  color: var(--signal-500);
  margin: 0;
}

.page-contact .contact-band h1 {
  font-family: var(--font-serif);
  font-size: clamp(27px, 4.6vw, 45px);
  font-weight: 700;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--paper-50);
  margin: 12px 0 16px;
  max-width: 21ch;
}

.page-contact .contact-band__lead {
  max-width: 60ch;
  margin: 0 0 var(--space-4);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--chart-300);
}

.page-contact .contact-band__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}

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

.page-contact .channels__row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 6px 16px;
  padding: 16px 0;
  border-top: 1px solid var(--hairline-dark);
}

.page-contact .channels__row:last-child {
  border-bottom: 1px solid var(--hairline-dark);
}

.page-contact .channels__row dt {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--signal-500);
  line-height: 1.9;
}

.page-contact .channels__row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper-50);
  overflow-wrap: anywhere;
}

.page-contact .channels__mail {
  font-size: 16px;
  letter-spacing: .01em;
}

.page-contact .channels__num {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--sunset-500);
}

.page-contact .channels__note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--chart-300);
}

.page-contact .contact-band__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--pc-shadow);
}

.page-contact .contact-band__media .media-frame__caption {
  color: var(--chart-300);
}

.page-contact .contact-band__foot {
  margin: var(--space-4) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--chart-300);
}

.page-contact .contact-band__foot a {
  color: var(--signal-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-band__foot a:focus-visible,
.page-contact .fix__help a:focus-visible,
.page-contact .advise__link a:focus-visible,
.page-contact .coop__foot a:focus-visible {
  outline: 2px solid var(--signal-500);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 资料纠错 ---------- */
.page-contact .fix {
  background: var(--paper-50);
}

.page-contact .fix__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}

.page-contact .fix__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--abyss-700);
}

.page-contact .fix__steps {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  counter-reset: fixstep;
}

.page-contact .fix__steps li {
  position: relative;
  counter-increment: fixstep;
  padding: 18px 0 18px 54px;
  border-top: 1px solid var(--hairline-light);
}

.page-contact .fix__steps li::before {
  content: counter(fixstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--abyss-700);
}

.page-contact .fix__steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink-900);
}

.page-contact .fix__steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--abyss-700);
}

.page-contact .fix__help {
  margin: var(--space-3) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--chart-600);
}

.page-contact .fix__help a,
.page-contact .advise__link a,
.page-contact .coop__foot a {
  color: var(--abyss-700);
  text-decoration: underline;
  text-decoration-color: var(--signal-500);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-contact .fix__help a:hover,
.page-contact .advise__link a:hover,
.page-contact .coop__foot a:hover {
  color: var(--signal-500);
}

.page-contact .fix__media {
  margin: 0;
  border-radius: var(--radius-lg) var(--radius-sm) var(--radius-lg) var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--pc-shadow);
}

/* ---------- 入口与使用建议 ---------- */
.page-contact .advise {
  background: var(--paper-50);
}

.page-contact .advise__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-contact .advise__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline-light);
}

.page-contact .advise__item:last-child {
  border-bottom: 1px solid var(--hairline-light);
}

.page-contact .advise__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--abyss-700);
}

.page-contact .advise__link {
  margin: var(--space-3) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--chart-600);
}

/* ---------- 主题带 ---------- */
.page-contact .theme-band {
  margin: var(--space-4) 0;
}

/* ---------- 合作对接 ---------- */
.page-contact .coop {
  background: var(--pc-mist);
}

.page-contact .coop__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--abyss-700);
}

.page-contact .coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-contact .coop__card {
  background: var(--pc-card);
  padding: var(--space-3) var(--space-3) var(--space-4);
  box-shadow: var(--pc-shadow);
}

.page-contact .coop__card--a {
  border-left: 4px solid var(--signal-500);
  border-radius: var(--radius-xl) var(--radius-lg) var(--radius-lg) var(--radius-lg);
}

.page-contact .coop__card--b {
  border-top: 4px solid var(--sunset-500);
  border-radius: var(--radius-lg) 6px var(--radius-xl) var(--radius-xl);
}

.page-contact .coop__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: clamp(21px, 2.6vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .coop__lead {
  margin: 0 0 var(--space-3);
  font-size: 14px;
  line-height: 1.8;
  color: var(--chart-600);
}

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

.page-contact .coop__list li {
  padding: 14px 0;
  border-top: 1px solid var(--hairline-light);
}

.page-contact .coop__list h3 {
  margin: 0 0 5px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--abyss-700);
}

.page-contact .coop__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-900);
}

.page-contact .coop__foot {
  margin: var(--space-3) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--chart-600);
}

/* ---------- 回复时效 ---------- */
.page-contact .reply {
  background: var(--abyss-900);
}

.page-contact .reply .eyebrow {
  color: var(--signal-500);
}

.page-contact .reply .section-title {
  color: var(--paper-50);
}

.page-contact .reply .section-lead {
  color: var(--chart-300);
}

.page-contact .reply__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-contact .reply__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline-dark);
}

.page-contact .reply__row--last {
  border-bottom: 1px solid var(--hairline-dark);
}

.page-contact .reply__what {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper-50);
}

.page-contact .reply__when {
  font-size: 15px;
  line-height: 1.85;
  color: var(--chart-300);
}

.page-contact .reply__row--last .reply__what {
  color: var(--sunset-500);
}

/* ---------- 响应式 ---------- */
@media (max-width: 419px) {
  .page-contact .channels__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-contact .fix__steps li {
    padding-left: 44px;
  }

  .page-contact .fix__steps li::before {
    font-size: 20px;
  }
}

@media (min-width: 760px) {
  .page-contact .advise__item {
    grid-template-columns: 168px 1fr;
    align-items: start;
    gap: 0 24px;
  }

  .page-contact .reply__row {
    grid-template-columns: 220px 1fr;
    align-items: baseline;
    gap: 0 32px;
  }
}

@media (min-width: 860px) {
  .page-contact .coop__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .page-contact .coop__card {
    padding: var(--space-3) var(--space-3) var(--space-5);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-band {
    padding: var(--space-5) 0 var(--space-6);
  }

  .page-contact .contact-band__grid {
    grid-template-columns: 1.05fr .95fr;
    gap: var(--space-5);
  }

  .page-contact .fix__grid {
    grid-template-columns: 1.35fr .9fr;
    gap: var(--space-5);
  }

  .page-contact .fix__media {
    position: sticky;
    top: calc(var(--header-h-compact) + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-band::before,
  .page-contact .contact-band::after {
    background: none;
  }
}
<<<END>>>