.page-contact {
  --ph-cut: 24px;
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

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

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 6vw, 60px) 0 clamp(36px, 7vw, 84px);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.85);
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 95% at 10% 0%, rgba(18, 49, 42, .42) 0%, rgba(10, 28, 23, .88) 56%, var(--ink) 100%);
}

.page-contact .contact-hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 16px;
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 17em;
  font-size: clamp(29px, 6.2vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.01em;
}

.page-contact .contact-hero .lede {
  max-width: 46em;
  margin: 0;
  color: var(--mist);
  opacity: .88;
}

.page-contact .contact-hero__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 4px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 章节骨架 ---------- */
.page-contact .section {
  padding-block: clamp(38px, 7vw, 84px);
}

.page-contact .section--last {
  padding-bottom: clamp(48px, 9vw, 104px);
}

.page-contact .chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-contact .chapter__num {
  font-family: var(--mono);
  font-size: clamp(34px, 8vw, 68px);
  font-weight: 700;
  line-height: .86;
  color: var(--neon);
  letter-spacing: -.02em;
}

.page-contact .chapter__eyebrow {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--sage);
}

.page-contact .chapter__title {
  margin: 0;
  font-size: clamp(21px, 4.4vw, 32px);
  font-weight: 800;
  line-height: 1.22;
}

.page-contact .chapter-lede {
  max-width: 52em;
  margin: 0 0 26px;
  font-size: clamp(15px, 2.6vw, 17px);
  line-height: 1.65;
  color: rgba(233, 245, 240, .82);
}

/* ---------- 来意切换 ---------- */
.page-contact .intent {
  position: relative;
}

.page-contact .intent__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-contact .intent__radio:focus-visible ~ .intent__grid .intent__tabs {
  outline: 2px solid var(--ice);
  outline-offset: 4px;
}

.page-contact .intent__grid {
  display: grid;
  gap: 14px;
}

.page-contact .intent__tabs {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-contact .intent__tab {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 15px 16px;
  background: var(--char);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background .24s var(--ease), border-color .24s var(--ease);
}

.page-contact .intent__tab:hover {
  border-color: var(--line-strong);
}

.page-contact .intent__tab-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--sage);
}

.page-contact .intent__tab-text strong {
  display: block;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.3;
}

.page-contact .intent__tab-text span {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  color: var(--sage);
}

.page-contact #intent-feedback:checked ~ .intent__grid .intent__tab[for="intent-feedback"],
.page-contact #intent-data:checked ~ .intent__grid .intent__tab[for="intent-data"],
.page-contact #intent-partner:checked ~ .intent__grid .intent__tab[for="intent-partner"] {
  background: var(--panel);
  border-color: rgba(61, 245, 176, .5);
  box-shadow: inset 4px 0 0 var(--neon);
}

.page-contact #intent-feedback:checked ~ .intent__grid .intent__tab[for="intent-feedback"] .intent__tab-num,
.page-contact #intent-data:checked ~ .intent__grid .intent__tab[for="intent-data"] .intent__tab-num,
.page-contact #intent-partner:checked ~ .intent__grid .intent__tab[for="intent-partner"] .intent__tab-num {
  color: var(--neon);
}

.page-contact .intent__panes {
  display: grid;
}

.page-contact .intent__pane {
  display: none;
  padding: clamp(20px, 4vw, 34px);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - var(--ph-cut)) 0, 100% var(--ph-cut), 100% 100%, 0 100%);
}

.page-contact #intent-feedback:checked ~ .intent__grid .intent__pane:nth-child(1),
.page-contact #intent-data:checked ~ .intent__grid .intent__pane:nth-child(2),
.page-contact #intent-partner:checked ~ .intent__grid .intent__pane:nth-child(3) {
  display: block;
}

.page-contact .intent__flag {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sage);
  text-transform: uppercase;
}

.page-contact .intent__pane h3 {
  margin: 0 0 12px;
  font-size: clamp(19px, 3.4vw, 24px);
  font-weight: 800;
  line-height: 1.3;
}

.page-contact .intent__pane p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.68;
  color: rgba(233, 245, 240, .84);
}

.page-contact .intent__list {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .intent__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(233, 245, 240, .78);
}

.page-contact .intent__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--neon);
}

/* ---------- 联系信息带 ---------- */
.page-contact .contact-band {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .contact-band__item {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(18px, 3.4vw, 30px);
  background: var(--char);
}

.page-contact .contact-band__key {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sage);
}

.page-contact .contact-band__value {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(15px, 2.6vw, 19px);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .02em;
  word-break: break-word;
}

.page-contact .contact-band__item:nth-child(1) .contact-band__value {
  color: var(--neon);
}

.page-contact .contact-band__item:nth-child(2) .contact-band__value {
  color: var(--amber);
}

.page-contact .contact-band__item:nth-child(3) .contact-band__value {
  color: var(--ice);
  font-size: clamp(14px, 2.3vw, 17px);
}

.page-contact .contact-band__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

.page-contact .contact-note {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid rgba(255, 166, 61, .6);
  font-size: 13px;
  line-height: 1.65;
  color: var(--sage);
}

/* ---------- 发信准备 ---------- */
.page-contact .prep-grid {
  display: grid;
  gap: 26px;
}

.page-contact .prep-media {
  margin: 0;
  background: var(--char);
}

.page-contact .prep-media img {
  width: 100%;
  object-fit: cover;
}

.page-contact .prep-list {
  counter-reset: prep;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .prep-list li {
  position: relative;
  padding: 15px 18px 15px 64px;
  background: var(--char);
  border-left: 2px solid rgba(61, 245, 176, .38);
  transition: border-color .24s var(--ease), background .24s var(--ease);
}

.page-contact .prep-list li:hover {
  border-left-color: var(--neon);
  background: var(--panel);
}

.page-contact .prep-list li::before {
  counter-increment: prep;
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 15px;
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--neon);
}

.page-contact .prep-list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 800;
}

.page-contact .prep-list span {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sage);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-grid {
  display: grid;
  gap: 16px;
}

.page-contact .coop-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(20px, 3.4vw, 26px);
  background: var(--char);
  border-top: 3px solid var(--neon);
}

.page-contact .coop-card:nth-child(2) {
  border-top-color: var(--ice);
}

.page-contact .coop-card:nth-child(3) {
  border-top-color: var(--amber);
}

.page-contact .coop-card__key {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sage);
}

.page-contact .coop-card h3 {
  margin: 0;
  font-size: clamp(18px, 3.2vw, 21px);
  font-weight: 800;
  line-height: 1.3;
}

.page-contact .coop-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: rgba(233, 245, 240, .8);
}

.page-contact .coop-card__list {
  margin: 4px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-contact .coop-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

.page-contact .coop-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 1px;
  background: var(--sage);
}

/* ---------- 知识中心引导 ---------- */
.page-contact .contact-tail-wrap {
  padding-block: clamp(10px, 2vw, 18px);
}

.page-contact .contact-tail {
  display: grid;
  gap: 18px;
  align-items: center;
  padding: clamp(22px, 4vw, 38px);
  background: var(--grad);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ph-cut)), calc(100% - var(--ph-cut)) 100%, 0 100%);
  color: var(--ink);
}

.page-contact .contact-tail__eyebrow {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: rgba(10, 28, 23, .72);
}

.page-contact .contact-tail h2 {
  margin: 0 0 8px;
  font-size: clamp(20px, 4vw, 28px);
  font-weight: 900;
  line-height: 1.24;
  color: var(--ink);
}

.page-contact .contact-tail p {
  margin: 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(10, 28, 23, .82);
}

.page-contact .contact-tail__btn {
  justify-self: start;
  background: var(--ink);
  color: var(--mist);
  border-color: transparent;
  white-space: nowrap;
}

/* ---------- 站点信息 ---------- */
.page-contact .site-card {
  padding: clamp(20px, 4vw, 34px);
  background: var(--char);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-contact .site-card__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .site-card__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .site-card__key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sage);
}

.page-contact .site-card__val {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist);
}

.page-contact .site-card__val a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 215, 255, .4);
}

.page-contact .site-card__val a:hover {
  border-bottom-color: var(--ice);
}

.page-contact .site-card__sep {
  margin: 0 8px;
  color: var(--sage);
}

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

  .page-contact .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .site-card__row {
    grid-template-columns: minmax(0, 150px) minmax(0, 1fr);
    gap: 10px 18px;
    align-items: baseline;
  }

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

@media (min-width: 940px) {
  .page-contact .chapter-head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: end;
    gap: 26px;
  }

  .page-contact .intent__grid {
    grid-template-columns: minmax(240px, .82fr) minmax(0, 1.6fr);
    gap: 0;
  }

  .page-contact .intent__tabs {
    gap: 0;
    padding-right: 20px;
  }

  .page-contact .intent__tab {
    border-bottom: 0;
  }

  .page-contact .intent__tab:first-child {
    border-bottom: 1px solid var(--line);
  }

  .page-contact .intent__pane {
    min-height: 100%;
  }

  .page-contact .prep-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 34px;
    align-items: start;
  }

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

@media (max-width: 420px) {
  .page-contact .chapter-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .chapter__num {
    font-size: 40px;
  }

  .page-contact .contact-band__value {
    font-size: 14px;
  }
}