.page-contact {
  --c-pad: clamp(20px, 5vw, 64px);
  --c-gap: clamp(14px, 2.4vw, 28px);
  --c-radius: 26px;
  --c-mono-track: 0.12em;
  background: var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(40px, 7vw, 88px);
  overflow-x: hidden;
}

.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0.18em 0 0.42em;
}

.page-contact .section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4vw, 42px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0.3em 0 0.5em;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(16px, 3.4vw, 36px) 0 clamp(34px, 6vw, 74px);
}

.page-contact .contact-hero__frame {
  position: relative;
  margin-top: clamp(14px, 2vw, 26px);
  padding: clamp(24px, 4.6vw, 56px) var(--c-pad);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(18, 214, 196, 0.1), transparent 58%),
    linear-gradient(158deg, var(--ink-800), var(--ink-900) 72%);
  border: 1px solid var(--line);
  border-radius: 4px var(--c-radius) 4px var(--c-radius);
}

.page-contact .contact-hero__frame::before {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  opacity: 0.65;
  pointer-events: none;
}

.page-contact .contact-hero__frame::after {
  content: "";
  position: absolute;
  left: 10px;
  bottom: 10px;
  width: 36px;
  height: 36px;
  border-bottom: 1px solid var(--orange);
  border-left: 1px solid var(--orange);
  opacity: 0.55;
  pointer-events: none;
}

.page-contact .contact-hero__frame .frame__tag {
  position: absolute;
  top: -1px;
  left: clamp(18px, 3vw, 44px);
  padding: 2px 10px 4px;
  background: var(--ink-900);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--c-mono-track);
  border: 1px solid rgba(240, 182, 77, 0.45);
  border-top: 0;
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-contact .contact-hero__lead {
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.88;
  color: var(--mist);
  margin: 0 0 clamp(20px, 3vw, 30px);
}

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

.page-contact .contact-hero__panel {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: 3px 20px 3px 20px;
  background: rgba(6, 20, 38, 0.6);
}

.page-contact .contact-hero__panel-k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--c-mono-track);
  color: var(--slate);
  text-transform: uppercase;
}

.page-contact .contact-hero__panel-v {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2vw, 20px);
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-contact .contact-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .contact-hero__facts li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
  color: var(--slate);
}

.page-contact .contact-hero__facts b {
  color: var(--paper);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-contact .contact-hero__hint {
  margin: 4px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
  border-left: 2px solid var(--orange);
  padding-left: 10px;
}

/* ---------- 章节通用 ---------- */
.page-contact .contact-section {
  padding: clamp(38px, 6.5vw, 84px) 0;
  position: relative;
}

.page-contact .contact-section + .contact-section::before,
.page-contact .contact-close::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--c-pad);
  right: var(--c-pad);
  height: 1px;
  background: var(--line);
}

.page-contact .contact-section__head {
  max-width: 44em;
}

.page-contact .contact-section__intro {
  margin: 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels-layout {
  display: grid;
  gap: var(--c-gap);
  margin-top: clamp(22px, 3vw, 38px);
}

.page-contact .channels-stack {
  display: grid;
  gap: var(--c-gap);
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(16px, 2.2vw, 24px) clamp(16px, 2.2vw, 24px) clamp(16px, 2.2vw, 24px) clamp(22px, 3vw, 32px);
  background: linear-gradient(178deg, rgba(10, 36, 64, 0.94), rgba(6, 20, 38, 0.9));
  border: 1px solid var(--line);
  border-radius: 3px 20px 20px 3px;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-contact .channel-card--orange::before { background: var(--orange); }
.page-contact .channel-card--amber::before { background: var(--amber); }

.page-contact .channel-card:hover {
  border-color: rgba(207, 239, 234, 0.34);
  transform: translateY(-2px);
}

.page-contact .channel-card__k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--c-mono-track);
  color: var(--slate);
}

.page-contact .channel-card__v {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 19px);
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .channel-card__v--addr {
  font-family: var(--font-body);
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.7;
}

.page-contact .channel-card__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .channel-media {
  margin: 0;
}

.page-contact .media__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  background: var(--ink-800);
}

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

.page-contact .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 反馈卡片 ---------- */
.page-contact .feedback-layout {
  display: grid;
  gap: var(--c-gap);
  margin-top: clamp(22px, 3vw, 38px);
}

.page-contact .feedback-cards {
  display: grid;
  gap: var(--c-gap);
  align-items: start;
}

.page-contact .fb-card {
  border: 1px solid var(--line);
  border-radius: 18px 18px 18px 4px;
  background: rgba(10, 36, 64, 0.55);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .fb-card[open] {
  border-color: rgba(18, 214, 196, 0.48);
  background: rgba(10, 36, 64, 0.92);
}

.page-contact .fb-card:hover {
  border-color: rgba(207, 239, 234, 0.36);
}

.page-contact .fb-card__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 12px;
  padding: clamp(15px, 2.2vw, 22px);
  cursor: pointer;
  list-style: none;
}

.page-contact .fb-card__head::-webkit-details-marker { display: none; }
.page-contact .fb-card__head::marker { content: ""; }

.page-contact .fb-card__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 16px;
}

.page-contact .fb-card__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-contact .fb-card__title {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-contact .fb-card__state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  white-space: nowrap;
  padding-top: 3px;
}

.page-contact .fb-card__dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--slate);
  transition: background 0.18s var(--ease);
}

.page-contact .fb-card[open] .fb-card__dot { background: var(--orange); }
.page-contact .fb-card[open] .fb-card__state { color: var(--orange); }

.page-contact .fb-card__label-close { display: none; }
.page-contact .fb-card[open] .fb-card__label-close { display: inline; }
.page-contact .fb-card[open] .fb-card__label-open { display: none; }

.page-contact .fb-card__body {
  padding: 0 clamp(15px, 2.2vw, 22px) clamp(16px, 2.2vw, 24px) calc(clamp(15px, 2.2vw, 22px) + 30px);
}

.page-contact .fb-card__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .feedback-media {
  margin: 0;
}

/* ---------- 提交步骤 ---------- */
.page-contact .steps-nav {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-contact .steps-rail {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  position: static;
}

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

.page-contact .steps-rail .toc__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 4px 10px 0;
  border-top: 2px solid var(--line);
  text-decoration: none;
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .steps-rail .toc__link:hover,
.page-contact .steps-rail .toc__link:focus-visible {
  color: var(--paper);
  border-top-color: var(--orange);
  outline: none;
}

.page-contact .steps-rail .toc__link[data-active="true"] {
  color: var(--paper);
  border-top-color: var(--orange);
}

.page-contact .steps-rail .toc__num {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-contact .steps-rail .toc__link[data-active="true"] .toc__num {
  color: var(--orange);
}

.page-contact .steps {
  display: grid;
  gap: var(--c-gap);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-contact .step {
  position: relative;
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 5px;
  scroll-margin-top: 90px;
}

.page-contact .step__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
  opacity: 0.85;
}

.page-contact .step__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-contact .step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 合作咨询 ---------- */
.page-contact .consult {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(24px, 4.4vw, 52px);
  background:
    radial-gradient(90% 120% at 0% 100%, rgba(11, 107, 102, 0.42), transparent 62%),
    linear-gradient(200deg, var(--ink-800), rgba(6, 20, 38, 0.96));
  border: 1px solid var(--line);
  border-radius: 8px 72px 8px 96px;
}

.page-contact .consult__lead {
  max-width: 36em;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-contact .consult__list li {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.page-contact .consult__list strong {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--c-mono-track);
  font-weight: 500;
  color: var(--amber);
}

.page-contact .consult__list span {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .consult__link-line {
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-contact .consult__link-line a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 214, 196, 0.45);
}

.page-contact .consult__link-line a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-contact .consult__aside {
  align-self: start;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid rgba(240, 182, 77, 0.4);
  border-radius: 22px 4px 22px 4px;
  background: rgba(6, 20, 38, 0.7);
}

.page-contact .consult__aside-k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--c-mono-track);
  color: var(--amber);
}

.page-contact .consult__big {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(42px, 7vw, 62px);
  line-height: 1;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .consult__big span {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--slate);
  margin-left: 6px;
}

.page-contact .consult__aside-note {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收尾行动 ---------- */
.page-contact .contact-close {
  position: relative;
  padding: clamp(38px, 6vw, 80px) 0 0;
}

.page-contact .contact-close__inner {
  padding-top: clamp(28px, 4vw, 48px);
}

.page-contact .contact-close__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.25;
  margin: 0.3em 0 clamp(20px, 3vw, 32px);
}

.page-contact .contact-close__rows {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

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

.page-contact .contact-close__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--c-mono-track);
  color: var(--slate);
}

.page-contact .contact-close__v {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 24px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .contact-close__note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 42em;
  font-size: 13px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .contact-close__links {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-contact .contact-close__links a {
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .contact-close__links a:hover,
.page-contact .contact-close__links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-contact .contact-hero__panel {
    border-left: 1px solid var(--line);
    background: transparent;
    border-top: 0;
  }

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

  .page-contact .fb-card:nth-child(2) { margin-top: clamp(18px, 3vw, 40px); }
  .page-contact .fb-card:nth-child(4) { margin-top: clamp(12px, 2vw, 26px); }

  .page-contact .steps-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
  }

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

  .page-contact .contact-close__row {
    grid-template-columns: minmax(110px, 150px) minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 960px) {
  .page-contact .channels-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-contact .channel-media {
    position: sticky;
    top: 24px;
  }

  .page-contact .consult {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .feedback-layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-contact .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .fb-card,
  .page-contact .fb-card__dot,
  .page-contact .steps-rail .toc__link,
  .page-contact .contact-close__links a {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}
<<<END>>>