.page-contact {
  --fb-gap: clamp(1.25rem, 2.8vw, 2.4rem);
  --fb-panel: linear-gradient(158deg, rgba(19, 34, 65, 0.92) 0%, rgba(7, 14, 34, 0.94) 58%, rgba(4, 9, 26, 0.97) 100%);
  --fb-edge: rgba(47, 240, 214, 0.22);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-contact .fb-crumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

/* ---------- 首屏 ---------- */

.page-contact .fb-intro-grid {
  position: relative;
  display: grid;
  gap: var(--fb-gap);
  padding-top: clamp(1.75rem, 4vw, 2.75rem);
}

.page-contact .fb-intro-grid::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(180px, 42%);
  height: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, #2ff0d6 0%, #3c7cff 58%, #ff6a3d 100%);
}

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

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

.page-contact .fb-quick {
  position: relative;
  overflow: hidden;
  padding: clamp(1.15rem, 3vw, 1.6rem);
  background: var(--fb-panel);
  border: 1px solid var(--fb-edge);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-contact .fb-quick::after {
  content: "";
  position: absolute;
  right: -32%;
  bottom: -58%;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 240, 214, 0.2), transparent 66%);
  pointer-events: none;
}

.page-contact .fb-quick-title {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .fb-quick-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .55rem;
}

.page-contact .fb-quick-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .35rem .9rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--line);
}

.page-contact .fb-quick-key {
  font-size: .85rem;
  color: var(--text-low);
}

.page-contact .fb-quick-val {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text-hi);
}

.page-contact .fb-quick-foot {
  position: relative;
  margin: .95rem 0 0;
  font-size: .85rem;
  line-height: 1.75;
  color: var(--text-mid);
}

/* ---------- 反馈分类 ---------- */

.page-contact .fb-accordion {
  display: grid;
  gap: .75rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .fb-acc-item {
  overflow: hidden;
  background: var(--fb-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color .25s ease, box-shadow .25s ease;
}

.page-contact .fb-acc-item[data-open] {
  border-color: var(--cyan-line);
  box-shadow: 0 18px 38px rgba(2, 6, 18, 0.5);
}

.page-contact .fb-acc-trigger {
  display: flex;
  align-items: center;
  gap: .85rem;
  width: 100%;
  padding: 1rem 1.1rem;
  background: none;
  border: 0;
  color: var(--text-hi);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

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

.page-contact .fb-acc-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-contact .fb-acc-label {
  flex: 1 1 auto;
  min-width: 0;
}

.page-contact .fb-acc-icon {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border: 1px solid var(--cyan-line);
  border-radius: 50%;
}

.page-contact .fb-acc-icon::before,
.page-contact .fb-acc-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform .25s ease, opacity .25s ease;
}

.page-contact .fb-acc-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-contact .fb-acc-item[data-open] .fb-acc-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.page-contact .fb-acc-panel {
  padding: 0 1.1rem 1.15rem;
}

.page-contact .fb-acc-text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-contact .fb-list {
  margin: .7rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .4rem;
}

.page-contact .fb-list li {
  position: relative;
  padding-left: 1.05rem;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--text-low);
}

.page-contact .fb-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

/* ---------- 图片位 ---------- */

.page-contact .fb-band {
  margin-top: clamp(.5rem, 2vw, 1rem);
}

.page-contact .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.page-contact .fb-prep-figure {
  margin: 0;
  border: 1px solid var(--line);
}

/* ---------- 提交准备 ---------- */

.page-contact .fb-prep-grid {
  display: grid;
  gap: var(--fb-gap);
  align-items: center;
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .fb-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .9rem;
}

.page-contact .fb-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .9rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(12, 23, 48, 0.55);
}

.page-contact .fb-step-num {
  align-self: start;
  padding: .18rem .55rem;
  border-radius: var(--radius-pill);
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .05em;
}

.page-contact .fb-step-title {
  margin: 0;
  font-size: .98rem;
  font-weight: 600;
  color: var(--text-hi);
}

.page-contact .fb-step-text {
  margin: .35rem 0 0;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--text-mid);
}

/* ---------- 受理过程 ---------- */

.page-contact .fb-flow {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .fb-flow-item {
  position: relative;
  padding: 0 0 1.75rem 2.4rem;
}

.page-contact .fb-flow-item:last-child {
  padding-bottom: 0;
}

.page-contact .fb-flow-item::before {
  content: "";
  position: absolute;
  left: .6rem;
  top: 1.45rem;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}

.page-contact .fb-flow-item:last-child::before {
  content: none;
}

.page-contact .fb-flow-num {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 1.2rem;
  height: 1.2rem;
  border: 1px solid var(--cyan-line);
  border-radius: 50%;
  background: var(--ink-800);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: .62rem;
  line-height: 1;
}

.page-contact .fb-flow-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-hi);
}

.page-contact .fb-flow-text {
  margin: .4rem 0 0;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ---------- 联系信息 ---------- */

.page-contact .fb-contact {
  padding: clamp(1.35rem, 4vw, 2.4rem);
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(47, 240, 214, 0.14), transparent 58%),
    linear-gradient(160deg, rgba(12, 23, 48, 0.95), rgba(4, 9, 26, 0.98));
}

.page-contact .fb-contact-grid {
  display: grid;
  gap: .85rem;
  margin-top: clamp(1.1rem, 3vw, 1.75rem);
}

.page-contact .fb-channel {
  min-width: 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(4, 9, 26, 0.55);
}

.page-contact .fb-channel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-low);
}

.page-contact .fb-channel-value {
  display: block;
  margin-top: .5rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.7;
  color: var(--text-hi);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .fb-contact-note {
  margin: 1.2rem 0 0;
  padding-left: .95rem;
  border-left: 2px solid var(--cyan-line);
  font-size: .88rem;
  line-height: 1.85;
  color: var(--text-mid);
}

/* ---------- 相关页面 ---------- */

.page-contact .fb-links {
  display: grid;
  gap: .85rem;
  margin-top: clamp(1rem, 3vw, 1.5rem);
}

.page-contact .fb-link {
  display: block;
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(12, 23, 48, 0.5);
  color: inherit;
  text-decoration: none;
  transition: border-color .25s ease, transform .25s ease, background-color .25s ease;
}

.page-contact .fb-link:hover,
.page-contact .fb-link:focus-visible {
  border-color: var(--cyan-line);
  background: rgba(19, 34, 65, 0.72);
  transform: translateY(-2px);
}

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

.page-contact .fb-link-title {
  display: block;
  font-size: .98rem;
  font-weight: 600;
  color: var(--text-hi);
}

.page-contact .fb-link-text {
  display: block;
  margin-top: .35rem;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--text-low);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .fb-contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .fb-intro-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-contact .fb-prep-grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }

  .page-contact .fb-acc-trigger {
    padding: 1.1rem 1.35rem;
  }

  .page-contact .fb-acc-panel {
    padding: 0 1.35rem 1.35rem;
    max-width: 68ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fb-acc-item,
  .page-contact .fb-acc-icon::before,
  .page-contact .fb-acc-icon::after,
  .page-contact .fb-link {
    transition: none;
  }

  .page-contact .fb-link:hover,
  .page-contact .fb-link:focus-visible {
    transform: none;
  }
}