.page-contact {
  --pc-gap: clamp(18px, 3vw, 34px);
  position: relative;
  background: var(--deep);
  color: var(--text);
  font-family: var(--sans);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.page-contact a {
  color: inherit;
  text-decoration: none;
}

.page-contact h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--cream);
}

.page-contact h3 {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 1.7vw, 1.22rem);
  line-height: 1.36;
  letter-spacing: -.01em;
  font-weight: 800;
  color: var(--text-strong);
}

.page-contact p {
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(96px, 13vw, 148px) clamp(40px, 6vw, 66px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(255, 138, 61, .16) 0%, rgba(7, 26, 47, 0) 56%),
    radial-gradient(90% 80% at 4% 96%, rgba(53, 240, 208, .14) 0%, rgba(7, 26, 47, 0) 62%),
    linear-gradient(162deg, var(--deep-2) 0%, var(--deep) 64%, #06162a 100%);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(138, 147, 160, .13) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 147, 160, .13) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9) 0%, rgba(0, 0, 0, .22) 72%, transparent 100%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9) 0%, rgba(0, 0, 0, .22) 72%, transparent 100%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -72%;
  width: 62%;
  height: 150%;
  transform: skewX(-16deg);
  pointer-events: none;
  background: linear-gradient(120deg, rgba(110, 106, 138, .22), rgba(53, 240, 208, .06));
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
  margin-bottom: clamp(30px, 5vw, 54px);
}

.page-contact .contact-hero__flags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(14, 42, 71, .55);
}

.page-contact .contact-hero__flag--a { border-left: 2px solid var(--cyan); }
.page-contact .contact-hero__flag--b { border-left: 2px solid var(--orange); transform: translateY(6px); }
.page-contact .contact-hero__flag--c { border-left: 2px solid var(--violet); transform: translateY(12px); }

.page-contact .contact-hero__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 48px);
}

.page-contact .contact-hero__title h1 {
  margin: 12px 0 0;
  max-width: 17ch;
  font-size: clamp(2rem, 6.4vw, 4rem);
  line-height: 1.04;
  letter-spacing: -.03em;
  font-weight: 900;
  color: var(--cream);
}

.page-contact .contact-hero__aside p {
  margin: 0 0 22px;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  color: var(--text);
}

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

/* ---------- 通用章节头部 ---------- */
.page-contact .contact-route,
.page-contact .contact-mail,
.page-contact .contact-coop,
.page-contact .contact-timing {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-contact .contact-mail,
.page-contact .contact-timing {
  border-top: 1px solid var(--line);
}

.page-contact .contact-coop {
  background: linear-gradient(180deg, rgba(14, 42, 71, .5), rgba(7, 26, 47, 0) 78%);
  border-top: 1px solid var(--line);
}

.page-contact .section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: clamp(24px, 4vw, 42px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-contact .section-head__main .eyebrow {
  margin: 0 0 10px;
}

.page-contact .section-head__note {
  margin: 0;
  padding-left: 14px;
  border-left: 1px solid var(--line-strong);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 来意分流 ---------- */
.page-contact .contact-route__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .step-stack {
  display: grid;
  gap: 14px;
}

.page-contact .step-card {
  position: relative;
  padding: 26px 22px 20px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: linear-gradient(158deg, rgba(14, 42, 71, .92), rgba(7, 26, 47, .88));
  outline: none;
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-contact .step-card::after {
  content: "";
  position: absolute;
  left: 100%;
  bottom: 16px;
  width: 22px;
  height: 1px;
  background: linear-gradient(to right, var(--line-strong), transparent);
  pointer-events: none;
}

.page-contact .step-card__bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  border-radius: 4px 4px 0 0;
}

.page-contact .step-card--use .step-card__bar { background: var(--cyan); }
.page-contact .step-card--version .step-card__bar { background: var(--orange); }
.page-contact .step-card--sourcing .step-card__bar { background: var(--violet); }

.page-contact .step-card__index {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-contact .step-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .step-card__more {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows .3s var(--ease), opacity .26s var(--ease), margin-top .3s var(--ease);
  margin-top: 0;
}

.page-contact .step-card__more > span {
  overflow: hidden;
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-soft);
}

.page-contact .step-card:hover,
.page-contact .step-card:focus-within,
.page-contact .step-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 22px 46px -32px rgba(0, 0, 0, .95);
}

.page-contact .step-card:hover .step-card__more,
.page-contact .step-card:focus .step-card__more,
.page-contact .step-card:focus-within .step-card__more {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 14px;
}

.page-contact .step-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 联系信息牌 ---------- */
.page-contact .contact-panel {
  position: relative;
  overflow: hidden;
  padding: 26px 22px 22px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: linear-gradient(150deg, rgba(24, 58, 92, .62), rgba(9, 30, 52, .76));
  backdrop-filter: blur(12px) saturate(120%);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  box-shadow: 0 26px 62px -38px rgba(0, 0, 0, .95);
}

.page-contact .contact-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange) 55%, var(--violet));
}

.page-contact .contact-panel__head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-panel__head .eyebrow {
  margin: 0 0 8px;
}

.page-contact .contact-panel__head h2 {
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
}

.page-contact .contact-panel__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.page-contact .contact-panel__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-contact .contact-panel__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--cream);
  word-break: break-word;
}

.page-contact .contact-panel__meta {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--stone);
}

.page-contact .contact-panel__note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--orange);
  background: rgba(255, 138, 61, .08);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 图示 ---------- */
.page-contact .contact-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border: 1px solid var(--line);
  background: rgba(14, 42, 71, .5);
}

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

.page-contact .contact-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--stone);
}

/* ---------- 邮件要点 ---------- */
.page-contact .contact-mail__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .section-head--stack {
  margin-bottom: 20px;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .checklist {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-contact .check-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(14, 42, 71, .46);
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-contact .check-item:hover {
  border-color: var(--line-strong);
}

.page-contact .check-item input {
  -webkit-appearance: none;
  appearance: none;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: rgba(7, 26, 47, .7);
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-contact .check-item input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .check-item input:checked {
  background: var(--moss);
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 4px var(--deep);
}

.page-contact .check-item:has(input:checked) {
  border-color: rgba(53, 240, 208, .48);
  background: rgba(24, 58, 92, .64);
}

.page-contact .check-item__body {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .check-item__body strong {
  display: block;
  margin-bottom: 3px;
  font-size: 14.5px;
  font-weight: 800;
  color: var(--cream);
  letter-spacing: -.01em;
}

.page-contact .contact-mail__tip {
  margin: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--stone);
}

.page-contact .contact-mail__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: rgba(14, 42, 71, .5);
}

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

.page-contact .contact-mail__figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--stone);
}

.page-contact .contact-inline-link {
  color: var(--cyan);
  border-bottom: 1px solid rgba(53, 240, 208, .42);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .contact-inline-link:hover,
.page-contact .contact-inline-link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan-soft);
}

/* ---------- 供稿合作 ---------- */
.page-contact .coop-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .coop-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.page-contact .coop-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .coop-item__num {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--terra);
  padding-top: 3px;
}

.page-contact .coop-item__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .coop-item__hint {
  margin-top: 10px !important;
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  font-size: 12.5px !important;
  color: var(--stone) !important;
}

.page-contact .coop-item > .tag {
  grid-column: 2;
  justify-self: start;
  align-self: start;
}

.page-contact .coop-flow {
  margin: 26px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  background: rgba(110, 106, 138, .12);
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 回复节奏 ---------- */
.page-contact .timing-list {
  margin: 0;
}

.page-contact .timing-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 5px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-contact .timing-row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .timing-row dt {
  font-size: 15px;
  font-weight: 800;
  color: var(--cream);
  letter-spacing: -.01em;
}

.page-contact .timing-row__time {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-contact .timing-row__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--stone);
}

.page-contact .contact-timing__foot {
  margin: 24px 0 0;
  font-size: 13px;
  color: var(--stone);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .step-card--version { margin-left: 28px; }
  .page-contact .step-card--sourcing { margin-left: 56px; }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-contact .section-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, .72fr);
    align-items: end;
    gap: 34px;
  }

  .page-contact .contact-route__layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-contact .contact-panel {
    position: sticky;
    top: 96px;
  }

  .page-contact .contact-mail__layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(26px, 4vw, 52px);
  }

  .page-contact .coop-item {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: start;
    gap: 6px 22px;
  }

  .page-contact .coop-item > .tag {
    grid-column: 3;
    grid-row: 1;
  }

  .page-contact .timing-row {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .68fr) minmax(0, 1.25fr);
    align-items: baseline;
    gap: 22px;
  }
}

@media (max-width: 420px) {
  .page-contact .contact-hero__flag--b,
  .page-contact .contact-hero__flag--c {
    transform: none;
  }

  .page-contact .step-card::after {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .step-card,
  .page-contact .step-card__more,
  .page-contact .check-item,
  .page-contact .check-item input,
  .page-contact .contact-inline-link {
    transition: none;
  }

  .page-contact .step-card:hover,
  .page-contact .step-card:focus-within,
  .page-contact .step-card:focus-visible {
    transform: none;
  }
}
<<<END>>>