.page-contact {
  --contact-gap: clamp(16px, 2vw, 28px);
  --contact-pad: clamp(48px, 7vw, 88px);
  background: var(--paper);
  color: var(--slate);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.page-contact .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 顶部信息区 ---------- */
.page-contact .contact-mast {
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--paper);
  padding: clamp(28px, 5vw, 56px) 0 clamp(56px, 9vw, 104px);
}

.page-contact .contact-mast .watermark-num {
  position: absolute;
  right: clamp(-30px, -2vw, -8px);
  bottom: -0.24em;
  font-family: var(--font-narrow);
  font-size: clamp(140px, 26vw, 300px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(245, 241, 232, 0.05);
  pointer-events: none;
  user-select: none;
}

.page-contact .contact-mast .breadcrumb,
.page-contact .contact-mast .breadcrumb__item,
.page-contact .contact-mast .breadcrumb__sep {
  color: rgba(245, 241, 232, 0.58);
}

.page-contact .contact-mast .breadcrumb__item[href]:hover {
  color: var(--signal);
}

.page-contact .contact-mast__eyebrow {
  font-family: var(--font-narrow);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
  margin: clamp(22px, 3.4vw, 38px) 0 0;
}

.page-contact .contact-mast__eyebrow--dark {
  color: var(--clay);
  margin: 0 0 10px;
}

.page-contact .contact-mast h1 {
  position: relative;
  z-index: 1;
  margin: clamp(14px, 1.8vw, 20px) 0 clamp(16px, 2.2vw, 24px);
  font-size: clamp(28px, 4.6vw, 50px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20ch;
}

.page-contact .contact-mast__lead {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.82;
  color: rgba(245, 241, 232, 0.78);
}

/* ---------- 联系渠道卡片 ---------- */
.page-contact .contact-channels {
  position: relative;
}

.page-contact .contact-channels__banner {
  height: clamp(140px, 22vw, 260px);
  overflow: hidden;
  background: var(--night);
}

.page-contact .contact-channels__banner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.58;
  filter: saturate(0.72);
}

.page-contact .contact-channels .container {
  position: relative;
  z-index: 2;
}

.page-contact .contact-cards {
  margin-top: clamp(-88px, -7vw, -44px);
}

.page-contact .contact-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 2.4vw, 32px);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  box-shadow: 6px 6px 0 rgba(20, 24, 28, 0.07);
}

.page-contact .contact-card--primary {
  background: var(--white);
  border: 2px solid var(--signal);
  box-shadow: 8px 8px 0 rgba(255, 107, 44, 0.16);
}

.page-contact .contact-card__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-narrow);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-contact .contact-card__label::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
}

.page-contact .contact-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.1vw, 26px);
  line-height: 1.3;
  font-weight: 600;
  color: var(--graphite);
  word-break: break-word;
}

.page-contact .contact-card--primary .contact-card__value {
  font-size: clamp(21px, 2.6vw, 32px);
}

.page-contact .contact-card--addr .contact-card__value {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.4vw, 17px);
  font-weight: 700;
  line-height: 1.6;
}

.page-contact .contact-card__value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--signal);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-card__value a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-contact .contact-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .contact-card__meta {
  margin: auto 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--clay);
  font-family: var(--font-narrow);
  text-transform: uppercase;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

/* ---------- 章节导语 ---------- */
.page-contact .contact-lead {
  margin: clamp(24px, 3vw, 36px) 0 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.3vw, 16px);
  line-height: 1.82;
  color: var(--slate);
}

.page-contact .contact-lead--small {
  margin-top: clamp(18px, 2.2vw, 26px);
  font-size: 14px;
  color: var(--slate);
}

.page-contact .contact-lead a,
.page-contact .contact-collab p a,
.page-contact .contact-form__privacy a {
  color: var(--grass);
  text-decoration: none;
  border-bottom: 1px solid var(--moss);
  padding-bottom: 1px;
}

.page-contact .contact-lead a:hover,
.page-contact .contact-collab p a:hover,
.page-contact .contact-form__privacy a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 分流列表 ---------- */
.page-contact .contact-routing {
  padding-bottom: var(--contact-pad);
}

.page-contact .route-list {
  margin-top: clamp(20px, 2.6vw, 34px);
  border-top: 1px solid var(--line-strong);
}

.page-contact .route-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .route-row__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--grass);
}

.page-contact .route-row__title {
  margin: 0 0 6px;
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--graphite);
}

.page-contact .route-row__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .route-row__channel {
  justify-self: start;
  align-self: start;
  padding: 4px 12px;
  border: 1px solid var(--moss);
  border-radius: 2px;
  font-family: var(--font-narrow);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grass);
  white-space: nowrap;
}

/* ---------- 提问建议 + 回复节奏 ---------- */
.page-contact .contact-brief {
  padding: var(--contact-pad) 0;
  background: linear-gradient(180deg, rgba(245, 241, 232, 0) 0%, rgba(245, 241, 232, 0) 46%, rgba(255, 255, 255, 0.75) 100%);
}

.page-contact .contact-brief__grid {
  align-items: start;
}

.page-contact .contact-brief h2,
.page-contact .contact-collab h2,
.page-contact .contact-form__intro h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--graphite);
}

.page-contact .contact-checklist {
  list-style: none;
  margin: clamp(22px, 2.8vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .contact-checklist li {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .contact-checklist li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 1px;
  background: var(--signal);
}

.page-contact .contact-brief__side {
  margin-top: clamp(28px, 4vw, 8px);
}

.page-contact .contact-sla {
  background: var(--night);
  color: var(--paper);
  border-radius: var(--radius-card);
  padding: clamp(24px, 3vw, 38px);
  position: relative;
  overflow: hidden;
}

.page-contact .contact-sla::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background-image: repeating-linear-gradient(to right, rgba(245, 241, 232, 0.28) 0 1px, transparent 1px 14px);
  opacity: 0.6;
}

.page-contact .contact-sla__label {
  display: block;
  font-family: var(--font-narrow);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 12px;
}

.page-contact .contact-sla__big {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .contact-sla__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.78);
}

.page-contact .contact-sla__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(245, 241, 232, 0.16);
  display: grid;
  gap: 10px;
}

.page-contact .contact-sla__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 241, 232, 0.72);
}

.page-contact .contact-sla__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--teal);
  border-radius: 1px;
}

/* ---------- 协作 ---------- */
.page-contact .contact-collab {
  padding: var(--contact-pad) 0;
}

.page-contact .contact-collab p {
  margin: clamp(16px, 2vw, 22px) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 62ch;
}

.page-contact .contact-collab .btn {
  margin-top: clamp(22px, 2.6vw, 30px);
}

.page-contact .collab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 8px);
  background: var(--line);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.page-contact .collab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 26px) clamp(16px, 2vw, 22px);
  background: var(--white);
}

.page-contact .collab-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--grass);
}

.page-contact .collab-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 表单 ---------- */
.page-contact .contact-form-sec {
  padding: 0 0 var(--contact-pad);
}

.page-contact .contact-form__intro p.contact-lead {
  margin-top: clamp(14px, 1.8vw, 20px);
}

.page-contact .contact-form__figure {
  margin: clamp(26px, 3.4vw, 42px) 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--night);
}

.page-contact .contact-form__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.86;
}

.page-contact .contact-form {
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  padding: clamp(22px, 3.2vw, 44px);
  box-shadow: 8px 8px 0 rgba(20, 24, 28, 0.06);
}

.page-contact .form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2vw, 24px);
}

.page-contact .field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-contact .field--full {
  grid-column: 1 / -1;
}

.page-contact .field label {
  font-family: var(--font-narrow);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-contact .field input,
.page-contact .field select,
.page-contact .field textarea {
  width: 100%;
  padding: 13px 15px;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--graphite);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .field textarea {
  resize: vertical;
  min-height: 132px;
}

.page-contact .field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--slate) 50%), linear-gradient(135deg, var(--slate) 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 40px;
}

.page-contact .field input:hover,
.page-contact .field select:hover,
.page-contact .field textarea:hover {
  border-color: var(--moss);
}

.page-contact .field input:focus,
.page-contact .field select:focus,
.page-contact .field textarea:focus {
  outline: none;
  background: var(--white);
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.16);
}

.page-contact .field input:user-invalid,
.page-contact .field select:user-invalid,
.page-contact .field textarea:user-invalid {
  border-color: var(--clay);
}

.page-contact .contact-form__foot {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: clamp(24px, 3vw, 34px);
  padding-top: clamp(20px, 2.4vw, 28px);
  border-top: 1px dashed var(--line);
}

.page-contact .contact-form__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
  max-width: 52ch;
}

.page-contact .contact-form__submit {
  align-self: flex-start;
  background: var(--grass);
  color: var(--paper);
  border-color: var(--grass);
  padding: 13px 30px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-contact .contact-form__submit:hover {
  background: var(--moss);
  border-color: var(--moss);
}

.page-contact .contact-form__submit:active {
  transform: translateY(1px);
}

.page-contact .contact-form__privacy {
  margin: clamp(16px, 2vw, 22px) 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 页尾边线刻度 ---------- */
.page-contact .page-tail-rule {
  height: 10px;
  margin: 0 var(--gutter);
  background-image: repeating-linear-gradient(to right, var(--line-strong) 0 1px, transparent 1px 14px);
  opacity: 0.55;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .contact-form__foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
  }

  .page-contact .contact-form__submit {
    align-self: center;
    flex: 0 0 auto;
  }
}

@media (min-width: 760px) {
  .page-contact .route-row {
    grid-template-columns: 56px minmax(0, 1fr) 110px;
    gap: clamp(18px, 2.4vw, 34px);
    align-items: start;
  }

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

  .page-contact .contact-brief__side {
    margin-top: 0;
  }

  .page-contact .contact-sla {
    position: sticky;
    top: 108px;
  }

  .page-contact .collab-stats {
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-brief__grid {
    row-gap: clamp(32px, 4vw, 56px);
  }
}

@media (max-width: 899px) {
  .page-contact .contact-cards > .contact-card {
    grid-column: 1 / -1;
  }

  .page-contact .contact-cards {
    margin-top: clamp(-56px, -6vw, -28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card__value a,
  .page-contact .field input,
  .page-contact .field select,
  .page-contact .field textarea,
  .page-contact .contact-form__submit {
    transition: none;
  }
}
<<<END>>>