.page-contact {
  --c-radius: 2px;
  background: var(--paper);
  color: var(--ink);
}

.page-contact .c-h2 {
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0;
}

/* 头部 */
.page-contact .c-head {
  background: var(--sand);
  border-bottom: 1px solid var(--line);
  padding: clamp(20px, 4vw, 34px) 0 clamp(26px, 4vw, 48px);
}

.page-contact .c-head__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(14px, 3vw, 26px);
}

.page-contact .c-head__title {
  margin: 0;
  font-size: clamp(30px, 6.6vw, 54px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -.015em;
  max-width: 18em;
}

.page-contact .c-head__lede {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.75;
}

.page-contact .c-routes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-contact .c-routes .route-btn {
  flex: 1 1 auto;
  text-align: center;
}

@media (min-width: 900px) {
  .page-contact .c-head__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    column-gap: var(--gap);
  }
  .page-contact .c-head__lede {
    padding-bottom: 8px;
    border-left: 2px solid var(--orange);
    padding-left: 18px;
  }
  .page-contact .c-routes .route-btn {
    flex: 0 0 auto;
    min-width: 168px;
  }
}

/* 左深右浅分栏 */
.page-contact .c-split {
  padding: clamp(26px, 5vw, 56px) 0;
}

.page-contact .c-split__grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 960px) {
  .page-contact .c-split__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-contact .c-info {
    position: sticky;
    top: 24px;
  }
}

.page-contact .c-info {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--c-radius);
  overflow: hidden;
}

.page-contact .c-info__media {
  position: relative;
  margin: 0;
  aspect-ratio: 3 / 2;
  background: linear-gradient(135deg, var(--green) 0%, var(--ink-2) 62%, var(--ink) 100%);
}

.page-contact .c-info__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0) 40%, rgba(11, 27, 43, .82) 100%);
  pointer-events: none;
}

.page-contact .c-info__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .78;
}

.page-contact .c-info__body {
  padding: clamp(20px, 3.4vw, 32px);
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-contact .c-info__tag {
  margin: 0;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--cyan);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.page-contact .c-field {
  display: grid;
  gap: 6px;
  border-top: 1px solid var(--line-light);
  padding-top: 14px;
}

.page-contact .c-field__key {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--grey);
}

.page-contact .c-field__row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-contact .c-field__val {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.6vw, 18px);
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  word-break: break-all;
  transition: border-color var(--ease), color var(--ease);
}

.page-contact .c-field__val:hover,
.page-contact .c-field__val:focus-visible {
  color: var(--orange-bright);
  border-bottom-color: var(--orange);
  outline: none;
}

.page-contact .c-field__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(252, 251, 247, .84);
}

.page-contact .copy-btn {
  font-size: 12px;
  letter-spacing: .08em;
  padding: 5px 10px;
  background: transparent;
  color: var(--cyan);
  border: 1px solid rgba(47, 211, 179, .45);
  border-radius: var(--c-radius);
  cursor: pointer;
  transition: background var(--ease), border-color var(--ease), color var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: rgba(47, 211, 179, .12);
  border-color: var(--cyan);
  outline: none;
}

.page-contact .copy-btn[data-copied] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* 留言板面板 */
.page-contact .c-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  border-radius: var(--c-radius);
  padding: clamp(20px, 3.4vw, 34px);
  display: grid;
  gap: clamp(14px, 2vw, 18px);
  box-shadow: 0 18px 40px -30px rgba(11, 27, 43, .55);
}

.page-contact .c-form__title {
  margin: 0;
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-contact .c-form__lede {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .c-form__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 560px) {
  .page-contact .c-form__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

.page-contact .c-form__field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-contact .c-form__label {
  font-size: 12px;
  letter-spacing: .12em;
  font-weight: 600;
  color: var(--muted);
}

.page-contact .c-form__input,
.page-contact .c-form__select,
.page-contact .c-form__area {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  transition: border-color var(--ease), box-shadow var(--ease);
}

.page-contact .c-form__area {
  min-height: 128px;
  resize: vertical;
  line-height: 1.65;
}

.page-contact .c-form__input:hover,
.page-contact .c-form__select:hover,
.page-contact .c-form__area:hover {
  border-color: var(--green);
}

.page-contact .c-form__input:focus,
.page-contact .c-form__select:focus,
.page-contact .c-form__area:focus {
  outline: none;
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(242, 106, 46, .16);
}

.page-contact .c-form__input:user-invalid,
.page-contact .c-form__area:user-invalid {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(217, 74, 61, .14);
}

.page-contact .c-form__foot {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px dashed var(--line);
  padding-top: 16px;
}

.page-contact .c-form__hint {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact .c-form__submit {
  align-self: stretch;
}

@media (min-width: 560px) {
  .page-contact .c-form__foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .page-contact .c-form__hint {
    max-width: 32em;
  }
  .page-contact .c-form__submit {
    align-self: auto;
    flex: 0 0 auto;
    min-width: 148px;
  }
}

/* 四类问题 */
.page-contact .c-topics-sec {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .c-topics__head {
  display: grid;
  gap: 10px;
}

.page-contact .c-topics__intro {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .c-topics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 700px) {
  .page-contact .c-topics {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-contact .c-topics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-contact .c-topic {
  background: var(--paper);
  border-top: 3px solid var(--green);
  padding: 18px 16px 16px;
  display: grid;
  align-content: start;
  gap: 8px;
  border-radius: var(--c-radius);
  transition: box-shadow var(--ease), border-color var(--ease);
}

.page-contact .c-topic:nth-child(2) {
  border-top-color: var(--orange);
}

.page-contact .c-topic:nth-child(3) {
  border-top-color: var(--ink);
}

.page-contact .c-topic:nth-child(4) {
  border-top-color: var(--cyan);
}

.page-contact .c-topic:hover {
  box-shadow: 0 14px 30px -24px rgba(11, 27, 43, .6);
}

.page-contact .c-topic .tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-contact .c-topic__title {
  margin: 0;
  font-size: 16px;
  line-height: 1.45;
  font-weight: 700;
}

.page-contact .c-topic__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .c-topic__meta {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--green);
  border-top: 1px solid var(--line-soft);
  padding-top: 8px;
}

.page-contact .c-folds {
  margin-top: clamp(22px, 3.4vw, 34px);
  display: grid;
  gap: 10px;
}

.page-contact .c-folds .fold {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  padding: 0 16px;
  transition: border-color var(--ease);
}

.page-contact .c-folds .fold:hover {
  border-color: var(--green);
}

.page-contact .c-folds .fold__title {
  cursor: pointer;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-contact .c-folds .fold__title::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--orange);
  font-size: 16px;
}

.page-contact .c-folds .fold[open] .fold__title::before {
  content: "–";
}

.page-contact .c-folds .fold__title::-webkit-details-marker {
  display: none;
}

.page-contact .c-folds .fold__body p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 62em;
}

/* 留言板说明 */
.page-contact .c-board {
  padding: clamp(28px, 5vw, 56px) 0;
}

.page-contact .c-board__grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 880px) {
  .page-contact .c-board__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }
  .page-contact .c-board__figure {
    order: 2;
  }
}

.page-contact .c-board__lede {
  margin: 12px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .c-board__list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .c-board__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 14.5px;
  line-height: 1.7;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .c-board__num {
  color: var(--orange);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-contact .c-board__links {
  margin: clamp(16px, 3vw, 22px) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-contact .c-board__figure {
  margin: 0;
  position: relative;
  background: linear-gradient(150deg, var(--sand) 0%, var(--ink-2) 100%);
  border-radius: var(--c-radius);
  overflow: hidden;
}

.page-contact .c-board__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  mix-blend-mode: luminosity;
  opacity: .9;
}

.page-contact .c-board__figure .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--paper);
  background: rgba(11, 27, 43, .82);
}

/* 合作与授权 */
.page-contact .c-coop {
  background: var(--green-deep);
  color: var(--paper);
  padding: clamp(30px, 5vw, 60px) 0;
}

.page-contact .c-coop__title {
  color: var(--paper);
  max-width: 22em;
}

.page-contact .c-coop__grid {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
}

@media (min-width: 820px) {
  .page-contact .c-coop__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
  }
}

.page-contact .c-coop__col {
  border-left: 2px solid var(--orange);
  padding-left: 16px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-contact .c-coop__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .c-coop__col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(252, 251, 247, .9);
}

.page-contact .c-coop__link {
  color: var(--paper);
  justify-self: start;
}

.page-contact .c-coop__link:hover,
.page-contact .c-coop__link:focus-visible {
  color: var(--orange-bright);
}

/* 位置与来访 */
.page-contact .c-loc {
  padding: clamp(28px, 5vw, 56px) 0 clamp(34px, 5vw, 64px);
}

.page-contact .c-loc__grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 860px) {
  .page-contact .c-loc__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
  }
}

.page-contact .c-map {
  position: relative;
  min-height: 210px;
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(90deg, rgba(47, 211, 179, .16) 1px, transparent 1px),
    linear-gradient(0deg, rgba(47, 211, 179, .16) 1px, transparent 1px),
    linear-gradient(135deg, rgba(30, 122, 79, .35) 0%, rgba(11, 27, 43, 0) 62%);
  background-size: 46px 46px, 46px 46px, 100% 100%;
  overflow: hidden;
}

@media (min-width: 860px) {
  .page-contact .c-map {
    min-height: 300px;
  }
}

.page-contact .c-map__pin {
  position: absolute;
  left: 58%;
  top: 42%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 7px rgba(242, 106, 46, .22), 0 0 0 16px rgba(242, 106, 46, .1);
}

.page-contact .c-map__cross {
  position: absolute;
  background: rgba(252, 251, 247, .28);
}

.page-contact .c-map__cross--v {
  left: 58%;
  top: 0;
  bottom: 0;
  width: 1px;
}

.page-contact .c-map__cross--h {
  top: 42%;
  left: 0;
  right: 0;
  height: 1px;
}

.page-contact .c-map__label {
  position: absolute;
  left: 12px;
  bottom: 10px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: rgba(252, 251, 247, .82);
}

.page-contact .c-loc__text {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-contact .c-loc__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 42em;
}

.page-contact .c-loc__addr {
  font-size: clamp(14px, 2.4vw, 16px);
  line-height: 1.7;
  color: var(--ink);
  border-left: 3px solid var(--green);
  padding-left: 12px;
  word-break: break-word;
}

.page-contact .c-loc__note {
  font-size: 13px;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}

.page-contact .c-loc__back {
  margin-top: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .c-field__val,
  .page-contact .copy-btn,
  .page-contact .c-form__input,
  .page-contact .c-form__select,
  .page-contact .c-form__area,
  .page-contact .c-topic,
  .page-contact .c-folds .fold {
    transition: none;
  }
}
<<<END>>>