.page-contact {
  --fb-board-w: 320px;
  --fb-cut: 20px;
  --fb-hair: rgba(92, 107, 103, 0.28);
  --fb-hair-soft: rgba(92, 107, 103, 0.14);
  --fb-gutter: 0px;
  background: var(--bg);
  color: var(--ink);
  padding-bottom: clamp(40px, 6vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-contact .fb-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: clamp(20px, 3vw, 36px) 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rule);
}

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

.page-contact .fb-crumb__now {
  color: var(--silver);
}

/* ---------- 首屏框景 ---------- */
.page-contact .fb-hero {
  position: relative;
  margin: clamp(16px, 2.4vw, 28px) 0 clamp(28px, 4vw, 52px);
  padding: clamp(22px, 3.6vw, 48px);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(47, 227, 154, 0.1), transparent 58%),
    linear-gradient(160deg, var(--panel) 0%, var(--bg) 78%);
  clip-path: polygon(0 0, calc(100% - var(--fb-cut)) 0, 100% var(--fb-cut), 100% 100%, var(--fb-cut) 100%, 0 calc(100% - var(--fb-cut)));
  overflow: hidden;
}

.page-contact .fb-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--fb-hair-soft) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, var(--fb-hair-soft) 0 1px, transparent 1px 64px);
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 72%);
}

.page-contact .fb-hero > * {
  position: relative;
  z-index: 1;
}

.page-contact .fb-hero__title {
  margin: 0.4em 0 0;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(34px, 6.2vw, 78px);
  line-height: 0.96;
  letter-spacing: -0.01em;
}

.page-contact .fb-hero__lede {
  margin-top: 18px;
  max-width: 58ch;
  color: var(--silver);
}

.page-contact .fb-hero__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--fb-hair);
}

.page-contact .fb-hero__cell {
  min-width: 0;
  padding-left: 12px;
  border-left: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-hero__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rule);
}

.page-contact .fb-hero__meta dd {
  margin: 6px 0 0;
  font-family: var(--font-num);
  font-size: clamp(18px, 2.4vw, 26px);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---------- 骨架：信息牌 + 内容流 ---------- */
.page-contact .fb-frame {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

/* ---------- 联络信息牌 ---------- */
.page-contact .fb-board__inner {
  position: relative;
  margin: 0 0 32px;
  padding: 20px 18px 22px;
  background: linear-gradient(180deg, var(--panel-2) 0%, var(--panel) 100%);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  box-shadow: inset 0 2px 0 0 var(--accent);
}

.page-contact .fb-board__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rule);
}

.page-contact .fb-board__index .num {
  margin-right: 6px;
  color: var(--silver);
}

.page-contact .fb-board__title {
  margin: 10px 0 18px;
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.page-contact .fb-facts {
  margin: 0;
  border-top: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-facts__row {
  padding: 12px 0;
  border-bottom: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-facts__row dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rule);
}

.page-contact .fb-facts__row dd {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .fb-facts__row dd.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--silver);
}

.page-contact .fb-board__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .fb-board__hours {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--fb-hair-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-contact .fb-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--accent);
  transform: rotate(45deg);
}

.page-contact .fb-board__links {
  display: grid;
  gap: 1px;
  margin-top: 18px;
  border-top: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-board__links a {
  padding: 10px 0 10px 12px;
  border-left: 2px solid transparent;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-contact .fb-board__links a:hover,
.page-contact .fb-board__links a:focus-visible {
  color: var(--ink);
  border-left-color: var(--accent);
  padding-left: 16px;
}

/* ---------- 内容流与章节 ---------- */
.page-contact .fb-sec {
  position: relative;
  padding-bottom: clamp(36px, 5vw, 68px);
}

.page-contact .fb-sec + .fb-sec {
  padding-top: clamp(30px, 4vw, 54px);
  border-top: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-sec__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rule);
}

.page-contact .fb-sec__index .num {
  margin-right: 6px;
  color: var(--silver);
}

.page-contact .fb-sec__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.005em;
}

.page-contact .fb-sec__lede {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .fb-text {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 对照表 ---------- */
.page-contact .fb-table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--fb-hair);
  background: rgba(7, 21, 18, 0.5);
}

.page-contact .fb-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

.page-contact .fb-table__caption {
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rule);
  border-bottom: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-table th,
.page-contact .fb-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--fb-hair-soft);
  color: var(--silver);
  line-height: 1.65;
}

.page-contact .fb-table thead th {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--rule);
  white-space: nowrap;
  background: rgba(14, 42, 34, 0.72);
}

.page-contact .fb-table tbody tr {
  transition: background-color var(--dur) var(--ease);
}

.page-contact .fb-table tbody tr:hover {
  background: rgba(18, 58, 44, 0.55);
}

.page-contact .fb-table tbody tr:hover th[scope="row"] {
  box-shadow: inset 2px 0 0 0 var(--accent);
}

.page-contact .fb-table tbody tr:hover .fb-type {
  filter: brightness(1.3);
}

.page-contact .fb-table tbody tr:last-child th,
.page-contact .fb-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-contact .fb-type {
  display: inline-block;
  padding: 3px 9px;
  border-left: 2px solid var(--rule);
  background: rgba(196, 205, 203, 0.08);
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
  white-space: nowrap;
  transition: filter var(--dur) var(--ease);
}

.page-contact .fb-type--warn {
  border-left-color: var(--warn);
  background: rgba(255, 210, 74, 0.12);
}

.page-contact .fb-type--accent {
  border-left-color: var(--accent);
  background: rgba(47, 227, 154, 0.12);
}

.page-contact .fb-type--cyan {
  border-left-color: var(--cyan);
  background: rgba(53, 224, 208, 0.12);
}

/* ---------- 图注块 ---------- */
.page-contact .fb-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-contact .fb-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--fb-hair);
  background: var(--deep);
}

.page-contact .fb-figure figcaption {
  margin-top: 12px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  line-height: 1.75;
  color: var(--silver);
}

/* ---------- 折叠清单 ---------- */
.page-contact .fb-folds {
  margin-top: 24px;
}

.page-contact .fb-fold {
  border: 1px solid var(--fb-hair);
  background: rgba(14, 42, 34, 0.4);
}

.page-contact .fb-fold + .fb-fold {
  margin-top: -1px;
}

.page-contact .fb-fold > summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  transition: background-color var(--dur) var(--ease);
}

.page-contact .fb-fold > summary::-webkit-details-marker {
  display: none;
}

.page-contact .fb-fold > summary:hover {
  background: rgba(18, 58, 44, 0.62);
}

.page-contact .fb-fold[open] > summary {
  border-bottom: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-fold__c {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--rule);
}

.page-contact .fb-fold[open] .fb-fold__c {
  color: var(--silver);
}

.page-contact .fb-fold__body {
  padding: 16px;
}

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

.page-contact .fb-check li {
  position: relative;
  padding-left: 26px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--silver);
}

.page-contact .fb-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 12px;
  height: 12px;
  border: 1px solid var(--rule);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-contact .fb-check li:hover::before {
  border-color: var(--accent);
  background: rgba(47, 227, 154, 0.16);
}

/* ---------- 主题格式代码块 ---------- */
.page-contact .fb-subject {
  margin-top: 24px;
  padding: 16px;
  border: 1px dashed var(--fb-hair);
  background: var(--deep);
}

.page-contact .fb-subject__label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--silver);
}

.page-contact .fb-square {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  background: var(--warn);
}

.page-contact .fb-code {
  margin: 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-contact .fb-subject__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--silver);
}

/* ---------- 流转步骤 ---------- */
.page-contact .fb-steps {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-steps li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--fb-hair-soft);
}

.page-contact .fb-steps__n {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--rule);
}

.page-contact .fb-steps h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.page-contact .fb-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- 不受理提示 ---------- */
.page-contact .fb-notice {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 3px solid var(--warn);
  background: rgba(255, 210, 74, 0.07);
}

.page-contact .fb-notice__key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.page-contact .fb-notice p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 桌面端：左牌右流 ---------- */
@media (min-width: 960px) {
  .page-contact .fb-frame {
    grid-template-columns: var(--fb-board-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .fb-board {
    position: sticky;
    top: 24px;
    align-self: start;
    padding-right: clamp(20px, 3vw, 44px);
  }

  .page-contact .fb-board__inner {
    margin-bottom: 0;
  }

  .page-contact .fb-stream {
    --fb-gutter: clamp(24px, 3vw, 56px);
    padding-left: var(--fb-gutter);
    border-left: 1px solid var(--fb-hair);
  }

  .page-contact .fb-sec::before {
    content: "";
    position: absolute;
    top: 7px;
    left: calc(-1 * var(--fb-gutter) - 1px);
    width: 14px;
    height: 1px;
    background: var(--rule);
  }
}

@media (min-width: 1200px) {
  .page-contact .fb-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-contact .fb-hero__meta > .fb-hero__cell + .fb-hero__cell {
    padding-left: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fb-fold > summary,
  .page-contact .fb-board__links a,
  .page-contact .fb-table tbody tr,
  .page-contact .fb-type,
  .page-contact .fb-check li::before {
    transition: none;
  }
}
<<<END>>>