.page-contact {
  --fb-pad: clamp(2.6rem, 6vw, 5.6rem);
  --fb-radius: 6px;
  background: var(--ink-950);
  color: var(--mist-100);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-contact h1,
.page-contact h2,
.page-contact h3 {
  font-family: var(--font-display);
  color: var(--mist-100);
}

.page-contact .fb-section {
  position: relative;
  padding: var(--fb-pad) 0;
  border-top: 1px solid var(--line);
}

.page-contact .fb-section:last-of-type {
  padding-bottom: clamp(3rem, 8vw, 7rem);
}

/* ---------- Hero ---------- */
.page-contact .fb-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.6rem) 0 clamp(2.4rem, 6vw, 4.4rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(70% 60% at 82% 14%, rgba(48, 224, 208, 0.13), transparent 70%),
    radial-gradient(52% 46% at 8% 0%, rgba(242, 180, 94, 0.1), transparent 74%),
    var(--ink-950);
  overflow: hidden;
}

.page-contact .fb-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: center;
}

.page-contact .fb-hero__text {
  min-width: 0;
}

.page-contact .fb-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--steel-500);
}

.page-contact .fb-crumb a {
  color: var(--mist-300);
  text-decoration: none;
}

.page-contact .fb-crumb a:hover,
.page-contact .fb-crumb a:focus-visible {
  color: var(--cyan-300);
}

.page-contact .fb-crumb__sep {
  color: var(--line);
}

.page-contact .fb-kicker {
  margin: 0 0 0.9rem;
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-contact h1 {
  margin: 0;
  font-size: clamp(2rem, 7.4vw, 3.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: 0.04em;
}

.page-contact .fb-lead {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist-300);
}

.page-contact .fb-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.7rem;
}

.page-contact .fb-hero__figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--fb-radius);
  overflow: hidden;
  background: var(--ink-900);
  box-shadow: 0 24px 60px rgba(6, 18, 31, 0.6);
}

.page-contact .fb-hero__figure img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
}

/* ---------- 通用区块头 ---------- */
.page-contact .fb-head {
  margin: 0 0 clamp(1.5rem, 3vw, 2.4rem);
}

.page-contact .fb-index {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-contact .fb-index::after {
  content: "";
  flex: 1;
  max-width: 120px;
  height: 1px;
  background: var(--line);
}

.page-contact .fb-title {
  margin: 0;
  font-size: clamp(1.5rem, 4.6vw, 2.35rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0.03em;
}

.page-contact .fb-sub {
  margin: 0.9rem 0 0;
  max-width: 62ch;
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--mist-300);
}

.page-contact .fb-note {
  margin: 1.4rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--amber-400);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--mist-300);
}

/* ---------- 筛选条 ---------- */
.page-contact .fb-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.4rem;
}

.page-contact .filter-btn {
  appearance: none;
  cursor: pointer;
  padding: 0.5rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--mist-300);
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .filter-btn:hover {
  color: var(--cyan-300);
  border-color: var(--cyan-400);
}

.page-contact .filter-btn:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .filter-btn.is-active {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
  font-weight: 600;
}

.page-contact .filter-status {
  flex-basis: 100%;
  margin: 0.2rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--steel-500);
}

/* ---------- 反馈类型 ---------- */
.page-contact .fb-types {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--fb-radius);
  overflow: hidden;
}

.page-contact .fb-type {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: clamp(1.2rem, 2.6vw, 1.8rem);
  background: var(--ink-900);
  transition: background 0.24s var(--ease);
}

.page-contact .fb-type:hover {
  background: var(--ink-800);
}

.page-contact .fb-type__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--amber-400);
}

.page-contact .fb-type__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.page-contact .fb-type__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-contact .fb-type__list {
  margin: 0;
  display: grid;
  gap: 0.5rem;
  font-size: 0.88rem;
}

.page-contact .fb-type__list dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--steel-500);
}

.page-contact .fb-type__list dd {
  margin: 0.3rem 0 0;
  line-height: 1.75;
  color: var(--mist-100);
}

.page-contact .fb-type__link {
  margin-top: auto;
  align-self: flex-start;
  padding-bottom: 2px;
  color: var(--cyan-400);
  font-size: 0.86rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .fb-type__link:hover,
.page-contact .fb-type__link:focus-visible {
  color: var(--cyan-300);
  border-bottom-color: var(--cyan-300);
}

/* ---------- 结构化记录 ---------- */
.page-contact .fb-record {
  background: var(--ink-900);
}

.page-contact .fb-record__grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
  align-items: start;
}

.page-contact .fb-record__text {
  min-width: 0;
}

.page-contact .fb-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .fb-steps li {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .fb-step__no {
  padding-top: 0.28rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--cyan-400);
}

.page-contact .fb-step__title {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-contact .fb-step__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-contact .fb-record__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--fb-radius);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: 0 20px 46px rgba(6, 18, 31, 0.55);
}

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

/* ---------- 联系渠道 ---------- */
.page-contact .fb-band {
  margin: 0 0 clamp(1.4rem, 3vw, 2.2rem);
}

.page-contact .fb-band svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-contact .fb-channels {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--fb-radius);
  overflow: hidden;
}

.page-contact .fb-channel {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: clamp(1.2rem, 2.6vw, 1.9rem);
  background: var(--ink-900);
  min-width: 0;
}

.page-contact .fb-channel--main {
  background: linear-gradient(158deg, var(--ink-800), var(--ink-900));
}

.page-contact .fb-channel__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--steel-500);
}

.page-contact .fb-channel__value {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--mist-100);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.page-contact .fb-channel__value--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  font-size: 1.02rem;
}

.page-contact a.fb-channel__value--mono:hover,
.page-contact a.fb-channel__value--mono:focus-visible {
  color: var(--cyan-300);
}

.page-contact .fb-channel__note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-contact .fb-channel .btn {
  align-self: flex-start;
  margin-top: 0.4rem;
}

/* ---------- 处理节奏 ---------- */
.page-contact .fb-pace {
  background: var(--ink-900);
}

.page-contact .fb-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--fb-radius);
  overflow: hidden;
}

.page-contact .fb-timeline li {
  padding: clamp(1.2rem, 2.6vw, 1.8rem);
  background: var(--ink-950);
}

.page-contact .fb-timeline__time {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--amber-400);
}

.page-contact .fb-timeline h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-contact .fb-timeline p:last-child {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-300);
}

/* ---------- 发信前阅读 ---------- */
.page-contact .fb-docs {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .fb-docs li {
  border-bottom: 1px solid var(--line);
}

.page-contact .fb-docs a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding: 1.1rem 0.2rem;
  text-decoration: none;
  color: var(--mist-100);
  transition: background 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-contact .fb-docs a::after {
  content: "→";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--cyan-400);
}

.page-contact .fb-docs a:hover,
.page-contact .fb-docs a:focus-visible {
  background: rgba(48, 224, 208, 0.06);
  padding-left: 0.9rem;
}

.page-contact .fb-docs a:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .fb-docs__name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-contact .fb-docs__desc {
  flex: 1 1 15rem;
  min-width: 0;
  font-size: 0.86rem;
  color: var(--steel-500);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-contact .fb-hero__figure img {
    height: 300px;
  }

  .page-contact .fb-docs a {
    flex-wrap: nowrap;
  }
}

@media (min-width: 860px) {
  .page-contact .fb-hero__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-contact .fb-hero__figure img {
    height: 400px;
  }

  .page-contact .fb-types {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .fb-timeline {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 960px) {
  .page-contact .fb-record__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-contact .fb-channels {
    grid-template-columns: 1.45fr 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .filter-btn,
  .page-contact .fb-type,
  .page-contact .fb-type__link,
  .page-contact .fb-docs a {
    transition: none;
  }

  .page-contact .fb-docs a:hover {
    padding-left: 0.2rem;
  }
}