.page-contact {
  --c-amber-ink: #8A5300;
  --c-on-paper: #06130F;
  --c-on-paper-soft: rgba(6, 19, 15, 0.64);
  --c-on-paper-faint: rgba(6, 19, 15, 0.46);
  --c-paper-rule: rgba(6, 19, 15, 0.16);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-contact .c-head {
  padding-top: clamp(24px, 4.5vw, 52px);
  padding-bottom: clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}

.page-contact .c-head .display-title {
  margin: 0.42em 0 0.5em;
  font-size: clamp(2.05rem, 7vw, 4.1rem);
  line-height: 1.02;
  letter-spacing: -0.012em;
  text-transform: uppercase;
}

.page-contact .c-head .lede {
  color: var(--cyan-soft);
  max-width: 62ch;
}

.page-contact .c-head__facts {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .c-head__fact {
  background: var(--ink);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.page-contact .c-head__num {
  font-size: clamp(1.5rem, 3.4vw, 2.35rem);
  line-height: 1;
  color: var(--amber);
}

.page-contact .c-head__cap {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--mute);
  line-height: 1.5;
}

/* ---------- 通用章节补充 ---------- */
.page-contact .c-meta {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--mute);
  margin: 0;
}

/* ---------- 双栏主体 ---------- */
.page-contact .c-desk__grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-contact .c-desk__rail {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.page-contact .c-desk__main {
  min-width: 0;
}

@media (min-width: 960px) {
  .page-contact .c-desk__grid {
    grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
    align-items: start;
  }
}

/* 反馈类型 */
.page-contact .c-types__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
}

.page-contact .c-types__item {
  background: var(--ink-2);
  padding: 15px 17px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  transition: background 0.25s ease;
}

.page-contact .c-types__item:hover,
.page-contact .c-types__item:focus-within {
  background: var(--ink);
}

.page-contact .c-types__idx {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .c-types__name {
  margin: 0 0 5px;
  font-family: var(--font-sans);
  font-size: 0.96rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .c-types__desc {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--mute);
}

/* 城市坐标图 */
.page-contact .c-desk__figure {
  margin: 0;
}

/* 联系信息纸卡 */
.page-contact .c-info {
  padding: clamp(20px, 3vw, 28px);
}

.page-contact .c-info__title {
  margin: 0 0 16px;
  font-family: var(--font-sans);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--c-on-paper);
}

.page-contact .c-info__list {
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .c-info__row {
  display: grid;
  gap: 5px;
  padding: 0 0 13px;
  margin-bottom: 13px;
  border-bottom: 1px dashed var(--c-paper-rule);
}

.page-contact .c-info__row:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-contact .c-info__key {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-on-paper-faint);
}

.page-contact .c-info__val {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--c-on-paper);
  word-break: break-word;
}

.page-contact .c-info__val.num {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.page-contact .c-info__note {
  margin: 0;
  font-size: 0.81rem;
  line-height: 1.7;
  color: var(--c-on-paper-soft);
}

.page-contact .c-info__legal {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.08em;
  color: var(--c-on-paper-faint);
}

/* ---------- 右侧邮件准备面板 ---------- */
.page-contact .c-draft {
  position: relative;
  padding: clamp(22px, 3.6vw, 42px);
  border: 1px solid var(--line-strong);
  background: linear-gradient(175deg, var(--ink-2) 0%, var(--ink) 62%, var(--graphite) 100%);
  overflow: hidden;
}

.page-contact .c-draft::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(46, 242, 200, 0.14);
  pointer-events: none;
}

.page-contact .c-draft__stamp {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 70px;
  height: 70px;
  border: 1px dashed rgba(255, 179, 71, 0.52);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transform: rotate(-9deg);
  font-family: var(--font-sans);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--amber);
  opacity: 0.78;
  pointer-events: none;
}

.page-contact .c-draft__label {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .c-draft__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.18;
  letter-spacing: 0.005em;
  color: var(--paper);
  max-width: 22ch;
}

.page-contact .c-draft__intro {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 56ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-contact .c-draft__tabs {
  position: relative;
  z-index: 1;
}

.page-contact .c-draft__tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-contact .c-draft__tabs .tabs__tab {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--mute);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 9px 15px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-contact .c-draft__tabs .tabs__tab:hover {
  color: var(--cyan-soft);
  border-color: rgba(46, 242, 200, 0.6);
}

.page-contact .c-draft__tabs .tabs__tab[aria-selected="true"] {
  background: rgba(46, 242, 200, 0.12);
  border-color: var(--cyan);
  color: var(--cyan-soft);
}

.page-contact .c-draft__tabs .tabs__tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .c-draft__panel {
  padding-top: clamp(18px, 2.4vw, 26px);
}

.page-contact .c-draft__fields {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .c-draft__fields li {
  background: rgba(6, 19, 15, 0.72);
  padding: 14px 16px;
  display: grid;
  gap: 5px;
}

.page-contact .c-draft__field {
  font-family: var(--font-sans);
  font-size: 0.89rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .c-draft__hint {
  font-size: 0.8rem;
  line-height: 1.68;
  color: var(--mute);
}

.page-contact .c-draft__foot {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  line-height: 1.72;
  color: var(--mute);
}

/* ---------- 数据校正流程 ---------- */
.page-contact .c-flow__grid {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
}

@media (min-width: 900px) {
  .page-contact .c-flow__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
}

.page-contact .c-flow__steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
}

.page-contact .c-flow__steps::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line-strong);
}

.page-contact .c-flow__step {
  position: relative;
  padding-bottom: clamp(20px, 2.6vw, 30px);
}

.page-contact .c-flow__step:last-child {
  padding-bottom: 0;
}

.page-contact .c-flow__step::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
}

.page-contact .c-flow__idx {
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-contact .c-flow__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .c-flow__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.82;
  color: var(--mute);
  max-width: 52ch;
}

.page-contact .c-flow__figure {
  margin: 0;
}

/* ---------- 合作咨询 ---------- */
.page-contact .c-partner__grid {
  align-items: stretch;
}

.page-contact .c-partner__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-contact .c-partner__card .tag {
  align-self: flex-start;
}

.page-contact .c-partner__req {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mute);
}

.page-contact .c-partner__foot {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--amber);
  background: var(--ink-2);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 响应时间 ---------- */
.page-contact .c-response__panel {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(20px, 3.4vw, 38px);
  background: var(--ink-2);
  border: 1px solid var(--line);
}

@media (min-width: 860px) {
  .page-contact .c-response__panel {
    grid-template-columns: minmax(0, 0.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-contact .c-response__lead {
  background: var(--paper);
  border-left: 4px solid var(--amber);
  padding: 22px 20px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-contact .c-response__num {
  font-size: clamp(2.8rem, 7vw, 4.2rem);
  line-height: 0.9;
  color: var(--c-on-paper);
}

.page-contact .c-response__unit {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--c-on-paper-soft);
}

.page-contact .c-response__tag {
  justify-self: start;
  margin-top: 6px;
}

.page-contact .c-response__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 1.75rem);
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-contact .c-response__text {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--mute);
}

.page-contact .c-response__fold {
  margin-top: 6px;
  border: 1px solid var(--line);
  background: rgba(6, 19, 15, 0.6);
}

.page-contact .c-response__fold summary {
  cursor: pointer;
  padding: 14px 16px;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
  list-style: none;
}

.page-contact .c-response__fold summary::-webkit-details-marker {
  display: none;
}

.page-contact .c-response__fold summary::after {
  content: " +";
  color: var(--cyan);
}

.page-contact .c-response__fold[open] summary::after {
  content: " −";
}

.page-contact .c-response__fold summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-contact .c-response__links {
  list-style: none;
  margin: 0;
  padding: 0 16px 16px;
  display: grid;
  gap: 1px;
}

.page-contact .c-response__links li {
  border-top: 1px solid var(--line);
}

.page-contact .c-response__links a {
  display: block;
  padding: 12px 4px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-contact .c-response__links a:hover,
.page-contact .c-response__links a:focus-visible {
  color: var(--cyan);
  padding-left: 10px;
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 720px) {
  .page-contact .c-head__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .c-head__fact:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 899px) {
  .page-contact .c-draft__stamp {
    display: none;
  }
}

@media (max-width: 560px) {
  .page-contact .c-draft__tabs .tabs__list {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 16px;
  }

  .page-contact .c-draft__tabs .tabs__tab {
    flex: 0 0 auto;
  }

  .page-contact .c-head__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .c-head__fact:last-child {
    grid-column: auto;
  }

  .page-contact .c-flow__steps {
    padding-left: 22px;
  }

  .page-contact .c-flow__step::before {
    left: -24px;
  }

  .page-contact .c-flow__steps::before {
    left: 3px;
  }
}