.page-contact {
  background-color: var(--paper);
  background-image: radial-gradient(rgba(18, 36, 29, .055) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--deep);
}

/* ---------- 首屏 ---------- */
.page-contact .fb-hero {
  background: var(--ink);
  color: var(--paper);
  padding-top: clamp(24px, 4vw, 48px);
  overflow: hidden;
}

.page-contact .fb-crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(246, 239, 227, .64);
  margin-bottom: clamp(28px, 5vw, 52px);
}

.page-contact .fb-crumb a {
  color: var(--gold-line);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .22s var(--ease);
}

.page-contact .fb-crumb a:hover,
.page-contact .fb-crumb a:focus-visible {
  border-bottom-color: currentColor;
}

.page-contact .fb-crumb span[aria-hidden] {
  margin: 0 8px;
  opacity: .45;
}

.page-contact .fb-hero__head {
  max-width: 760px;
  padding-bottom: clamp(30px, 5vw, 58px);
}

.page-contact .fb-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .34em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-contact .fb-hero__title {
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: .02em;
  color: var(--gold);
  text-shadow: 1px 0 0 var(--gold-line);
}

.page-contact .fb-hero__lede {
  margin: 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(246, 239, 227, .86);
}

.page-contact .fb-hero__marks {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-contact .fb-hero__marks li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--gold-line);
  border: 1px solid rgba(242, 200, 121, .38);
  border-radius: 999px;
  padding: 6px 15px;
}

.page-contact .fb-hero__figure {
  margin: 0;
  border-top: 1px solid rgba(242, 200, 121, .32);
  line-height: 0;
}

.page-contact .fb-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(170px, 28vw, 320px);
  object-fit: cover;
  max-width: 100%;
}

/* ---------- 主体两栏 ---------- */
.page-contact .fb-body {
  padding-top: clamp(42px, 7vw, 88px);
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-contact .fb-grid {
  display: grid;
  gap: clamp(34px, 5vw, 54px);
}

.page-contact .fb-main {
  display: grid;
  gap: clamp(44px, 6vw, 82px);
  min-width: 0;
}

@media (min-width: 960px) {
  .page-contact .fb-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(290px, .9fr);
    align-items: start;
  }
}

/* ---------- 章节标题 ---------- */
.page-contact .fb-head {
  display: grid;
  gap: 9px;
  margin-bottom: 24px;
}

.page-contact .fb-head__num {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--gold);
  background: rgba(224, 138, 30, .14);
  border: 1px solid rgba(224, 138, 30, .35);
  border-radius: 6px;
  padding: 2px 9px;
}

.page-contact .fb-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.28;
  letter-spacing: .02em;
  color: var(--deep);
}

.page-contact .fb-head p {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 21, 18, .72);
}

@media (min-width: 720px) {
  .page-contact .fb-head {
    position: relative;
    padding-left: 62px;
    gap: 10px;
  }
  .page-contact .fb-head__num {
    position: absolute;
    left: 0;
    top: 3px;
    font-size: 15px;
    padding: 3px 10px;
  }
}

/* ---------- 三类反馈卡片 ---------- */
.page-contact .fb-types {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-contact .fb-type {
  background: var(--paper);
  border-radius: 14px;
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-contact .fb-type .tag {
  align-self: flex-start;
  font-size: 12px;
  letter-spacing: .08em;
}

.page-contact .fb-type h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.42;
  letter-spacing: .02em;
  color: var(--deep);
}

.page-contact .fb-type p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(11, 21, 18, .74);
}

.page-contact .fb-type__more {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--edge);
}

.page-contact .fb-type__more summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
}

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

.page-contact .fb-type__more summary::after {
  content: "展开";
  margin-left: auto;
  font-size: 12px;
  font-weight: 400;
  color: rgba(11, 21, 18, .48);
}

.page-contact .fb-type__more[open] summary::after {
  content: "收起";
}

.page-contact .fb-type__more ul {
  margin: 12px 0 0;
  padding-left: 17px;
  display: grid;
  gap: 6px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(11, 21, 18, .78);
}

.page-contact .fb-type__more li::marker {
  color: var(--gold);
}

@media (min-width: 760px) {
  .page-contact .fb-types {
    grid-template-columns: repeat(6, 1fr);
    gap: 18px;
  }
  .page-contact .fb-type--a {
    grid-column: span 4;
  }
  .page-contact .fb-type--b {
    grid-column: span 2;
  }
  .page-contact .fb-type--c {
    grid-column: span 6;
    padding: 22px 24px 18px;
  }
  .page-contact .fb-type--c h3 {
    font-size: 21px;
  }
}

.page-contact .fb-links {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(11, 21, 18, .6);
}

.page-contact .fb-links a,
.page-contact .fb-sample__tip a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(224, 138, 30, .45);
  padding-bottom: 1px;
}

.page-contact .fb-links a:hover,
.page-contact .fb-sample__tip a:hover,
.page-contact .fb-links a:focus-visible,
.page-contact .fb-sample__tip a:focus-visible {
  border-bottom-color: var(--gold);
}

/* ---------- 四要素检查清单 ---------- */
.page-contact .fb-check {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .fb-check__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  background: var(--tag);
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 14px 16px;
}

.page-contact .fb-check__box {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1.5px solid var(--gold);
  border-radius: 5px;
  background: var(--paper);
}

.page-contact .fb-check__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
  transform: rotate(40deg);
}

.page-contact .fb-check__text strong {
  display: block;
  font-family: var(--font-head);
  font-size: 15px;
  line-height: 1.5;
  color: var(--deep);
  margin-bottom: 3px;
}

.page-contact .fb-check__text p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(11, 21, 18, .72);
}

@media (min-width: 700px) {
  .page-contact .fb-check {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
}

.page-contact .fb-sample {
  background: var(--ink);
  border-left: 4px solid var(--gold);
  border-radius: 12px;
  padding: 20px 22px;
  margin-bottom: 14px;
}

.page-contact .fb-sample__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .26em;
  color: var(--gold-line);
}

.page-contact .fb-sample__body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  color: rgba(246, 239, 227, .9);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-contact .fb-sample__tip {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(11, 21, 18, .62);
}

/* ---------- 处理流程 ---------- */
.page-contact .fb-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .fb-flow__step {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--edge);
  border-radius: 12px;
  padding: 18px 18px 16px;
  box-shadow: 4px 4px 0 rgba(18, 36, 29, .07);
}

.page-contact .fb-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-contact .fb-flow__step h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16.5px;
  letter-spacing: .02em;
  color: var(--deep);
}

.page-contact .fb-flow__step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(11, 21, 18, .72);
}

@media (min-width: 800px) {
  .page-contact .fb-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

.page-contact .fb-flow__figure {
  margin: 22px 0 0;
}

.page-contact .fb-flow__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--edge);
  object-fit: cover;
}

.page-contact .fb-flow__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(11, 21, 18, .58);
  border-left: 2px solid var(--gold-line);
  padding-left: 12px;
}

/* ---------- 合作与媒体 ---------- */
.page-contact .fb-partners {
  display: grid;
  gap: 16px;
}

.page-contact .fb-partners__item {
  background: var(--paper);
  border-radius: 12px;
  padding: 20px 20px 18px;
}

.page-contact .fb-partners__item h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--deep);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--edge);
}

.page-contact .fb-partners__item ul {
  margin: 0;
  padding-left: 17px;
  display: grid;
  gap: 7px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(11, 21, 18, .76);
}

.page-contact .fb-partners__item li::marker {
  color: var(--gold);
}

@media (min-width: 700px) {
  .page-contact .fb-partners {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
}

.page-contact .fb-partners__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(11, 21, 18, .7);
}

.page-contact .fb-partners__note strong {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--gold);
  word-break: break-word;
}

/* ---------- 右侧联系信息板 ---------- */
.page-contact .fb-board {
  display: flex;
  gap: 16px;
  background: var(--ink);
  border: 1px solid var(--gold-line);
  border-radius: 16px;
  padding: 24px 20px;
  box-shadow: var(--shadow-paper);
  color: var(--paper);
  min-width: 0;
}

.page-contact .fb-board__title {
  writing-mode: vertical-rl;
  margin: 0;
  padding-right: 12px;
  border-right: 1px solid rgba(242, 200, 121, .32);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .32em;
  color: var(--gold);
}

.page-contact .fb-board__body {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  gap: 18px;
}

.page-contact .fb-board__row {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-contact .fb-board__label {
  font-size: 11px;
  letter-spacing: .28em;
  color: rgba(242, 200, 121, .78);
}

.page-contact .fb-board__value {
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(246, 239, 227, .92);
  overflow-wrap: anywhere;
}

.page-contact .fb-board__value--mono {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .01em;
  color: var(--gold-line);
}

.page-contact .fb-board__note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(242, 200, 121, .3);
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(246, 239, 227, .68);
}

@media (min-width: 960px) {
  .page-contact .fb-board {
    position: sticky;
    top: 92px;
    padding: 28px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fb-crumb a {
    transition: none;
  }
}