.page-contact {
  --contact-muted: #3D4A58;
  --contact-rule: rgba(14, 27, 44, 0.14);
}

.page-contact .contact-hero {
  padding: clamp(26px, 5vw, 56px) 0 0;
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact .breadcrumb a {
  color: var(--green);
  text-decoration: none;
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--mist);
}

.page-contact .contact-title {
  max-width: 16ch;
  color: var(--ink);
}

.page-contact .contact-lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.75;
  color: var(--contact-muted);
}

.page-contact .contact-hero__art {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-warm);
}

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

.page-contact .contact-section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-contact .contact-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .contact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 64px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-contact .contact-head h2 {
  margin: 12px 0 12px;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-contact .contact-head__lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
  color: var(--contact-muted);
}

/* 01 联络渠道 */
.page-contact .contact-split {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-contact .contact-cards {
  display: grid;
  gap: 1px;
  background: var(--contact-rule);
  border: 1px solid var(--contact-rule);
  border-radius: 14px;
  overflow: hidden;
}

.page-contact .contact-card {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--paper-warm);
}

.page-contact .contact-card__key {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--green);
}

.page-contact .contact-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(19px, 2.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.page-contact .contact-card__value--addr {
  font-size: clamp(15px, 1.8vw, 19px);
  line-height: 1.55;
  letter-spacing: 0;
}

.page-contact .contact-card__note {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--contact-muted);
}

.page-contact .contact-aside {
  padding: clamp(20px, 3vw, 28px);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
}

.page-contact .contact-aside h3 {
  margin: 0 0 16px;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .contact-aside__list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .contact-aside__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--contact-muted);
}

.page-contact .contact-aside__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green-bright);
}

.page-contact .contact-aside__list strong {
  color: var(--ink);
}

.page-contact .contact-aside__tip {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--contact-rule);
  font-size: 15px;
  line-height: 1.7;
  color: var(--contact-muted);
}

/* 02 纠错流程 */
.page-contact .contact-section--dark {
  background: var(--ink);
  color: var(--white);
  padding-top: 0;
}

.page-contact .contact-section--dark::before {
  content: "";
  display: block;
  height: 10px;
  margin-bottom: clamp(40px, 6vw, 64px);
  background: var(--gold);
  clip-path: polygon(0 0, 100% 0, 100% 30%, 0 100%);
}

.page-contact .contact-section--dark .contact-num {
  color: var(--gold);
}

.page-contact .contact-section--dark .contact-head h2 {
  color: var(--white);
}

.page-contact .contact-section--dark .contact-head__lede {
  color: rgba(253, 252, 247, 0.78);
}

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

.page-contact .contact-step {
  position: relative;
  padding: 0 0 26px 46px;
}

.page-contact .contact-step::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: rgba(233, 180, 76, 0.38);
}

.page-contact .contact-step:last-child {
  padding-bottom: 0;
}

.page-contact .contact-step:last-child::before {
  display: none;
}

.page-contact .contact-step__dot {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
}

.page-contact .contact-step summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 4px 0 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

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

.page-contact .contact-step summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--green-bright);
}

.page-contact .contact-step details[open] summary::after {
  content: "\2212";
}

.page-contact .contact-step summary:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.page-contact .contact-step__body {
  padding-top: 10px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(253, 252, 247, 0.82);
}

.page-contact .contact-steps__foot {
  margin: clamp(26px, 4vw, 36px) 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(253, 252, 247, 0.2);
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(253, 252, 247, 0.85);
}

.page-contact .contact-steps__foot .num {
  color: var(--gold);
  font-weight: 600;
  overflow-wrap: anywhere;
}

/* 03 合作 */
.page-contact .contact-partners {
  display: grid;
  gap: 18px;
}

.page-contact .contact-partner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 26px);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--paper);
}

.page-contact .contact-partner__tag {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--green);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.page-contact .contact-partner--b .contact-partner__tag {
  background: var(--ink);
  color: var(--white);
}

.page-contact .contact-partner--c .contact-partner__tag {
  background: var(--orange);
  color: var(--ink);
}

.page-contact .contact-partner h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .contact-partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--contact-muted);
}

.page-contact .contact-partner .contact-partner__prep {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--contact-rule);
  font-size: 14px;
  line-height: 1.7;
  color: var(--green);
}

/* 04 示例邮件 */
.page-contact .contact-section--warm {
  background: var(--paper-warm);
}

.page-contact .contact-letters {
  display: grid;
  gap: 18px;
}

.page-contact .contact-letter {
  position: relative;
  padding: 20px 20px 20px 22px;
  border-left: 3px solid var(--green);
  border-radius: 0 14px 14px 0;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .contact-letter::before {
  content: "\201C";
  position: absolute;
  top: 2px;
  right: 14px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 46px;
  line-height: 1;
  color: rgba(31, 122, 90, 0.18);
}

.page-contact .contact-letter__label {
  display: inline-block;
  margin: 0 0 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--contact-rule);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-contact .contact-letter__line {
  margin: 0 0 8px;
  overflow-wrap: anywhere;
}

.page-contact .contact-letter__line:last-child {
  margin-bottom: 0;
}

.page-contact .contact-letter__k {
  color: var(--green);
  font-weight: 600;
}

/* 05 后续流程 */
.page-contact .contact-follow {
  display: grid;
  gap: clamp(22px, 4vw, 36px);
}

.page-contact .contact-follow__art {
  margin: 0;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-warm);
}

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

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

.page-contact .contact-flow li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--contact-rule);
  font-size: 15px;
  line-height: 1.7;
  color: var(--contact-muted);
}

.page-contact .contact-flow li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-flow__num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--green);
}

.page-contact .contact-flow strong {
  display: block;
  margin-bottom: 2px;
  font-size: 16px;
  color: var(--ink);
}

.page-contact .contact-help-cta {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--radius);
  background: var(--deep);
  color: var(--white);
}

.page-contact .contact-help-cta h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.3vw, 25px);
  line-height: 1.3;
  color: var(--white);
}

.page-contact .contact-help-cta p {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(253, 252, 247, 0.82);
}

@media (min-width: 760px) {
  .page-contact .contact-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-contact .contact-follow {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

  .page-contact .contact-title {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-step summary::after {
    transition: none;
  }
}
<<<END>>>