.page-contact {
  --ct-cut: 26px;
  --ct-pad: clamp(18px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.2vw, 34px) 0 clamp(46px, 6vw, 78px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(80% 130% at 104% -10%, rgba(122, 92, 255, .22), transparent 60%),
    radial-gradient(70% 100% at -12% 120%, rgba(34, 245, 208, .13), transparent 62%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -20%;
  right: -6%;
  width: 42%;
  min-width: 200px;
  height: 140%;
  background: linear-gradient(200deg, rgba(34, 245, 208, .10), rgba(122, 92, 255, .07) 55%, transparent 86%);
  transform: skewX(-8deg);
  pointer-events: none;
  z-index: 0;
}

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

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(24px, 4vw, 46px);
}

.page-contact .contact-hero__intro h1 {
  margin: 12px 0 0;
  max-width: 14em;
}

.page-contact .contact-hero__intro .lede {
  margin-top: clamp(16px, 2vw, 24px);
  max-width: 40em;
}

.page-contact .contact-hero__hint {
  margin-top: 18px;
  font-size: 14px;
  color: var(--paper-56);
}

.page-contact .contact-hero__hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 245, 208, .4);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-contact .contact-hero__hint a:hover {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* 大号联系卡 */
.page-contact .contact-card {
  position: relative;
  padding: var(--ct-pad);
  background: linear-gradient(155deg, var(--ink-800) 0%, var(--ink-700) 100%);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ct-cut)), calc(100% - var(--ct-cut)) 100%, 0 100%);
  box-shadow: 0 28px 64px -36px rgba(34, 245, 208, .42);
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 52%, transparent);
}

.page-contact .contact-card__kicker {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .contact-card__label {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-contact .contact-card__label + a {
  margin-bottom: clamp(16px, 2.4vw, 22px);
}

.page-contact .contact-card__mail,
.page-contact .contact-card__tel {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--paper);
  text-decoration: none;
  line-height: 1.3;
  word-break: break-all;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .contact-card__mail {
  font-size: clamp(15px, 3.4vw, 22px);
}

.page-contact .contact-card__tel {
  font-size: clamp(26px, 6.4vw, 40px);
  letter-spacing: .04em;
}

.page-contact .contact-card__mail:hover,
.page-contact .contact-card__tel:hover {
  color: var(--cyan);
}

.page-contact .contact-card__mail:focus-visible,
.page-contact .contact-card__tel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-contact .contact-card__note {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-56);
}

/* ---------- 章节索引 ---------- */
.page-contact .sec-index {
  font-family: var(--font-mono);
  color: var(--cyan);
  margin-right: 10px;
}

/* ---------- 合作方向 ---------- */
.page-contact .dir-band {
  margin: 0 0 clamp(24px, 3.4vw, 40px);
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}

.page-contact .dir-band img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .dir-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
}

.page-contact .dir-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: border-color var(--t-base) var(--ease), background var(--t-base) var(--ease);
}

.page-contact .dir-card:hover,
.page-contact .dir-card:focus-within {
  border-color: var(--cyan);
  background: var(--ink-700);
}

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

.page-contact .dir-card__title {
  margin: 0;
}

.page-contact .dir-card__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-72);
}

.page-contact .dir-card__more {
  margin-top: auto;
  padding-top: 6px;
}

.page-contact .dir-card__more > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  color: var(--paper-72);
  font-size: 14px;
  cursor: pointer;
  list-style: none;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-contact .dir-card__more > summary::-webkit-details-marker {
  display: none;
}

.page-contact .dir-card__more > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--cyan);
}

.page-contact .dir-card__more[open] > summary::after {
  content: "−";
}

.page-contact .dir-card__more > summary:hover,
.page-contact .dir-card__more > summary:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}

.page-contact .dir-card__body {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-72);
}

.page-contact .dir-card__body p {
  margin: 0;
}

.page-contact .dir-card__body strong {
  color: var(--cyan-soft);
  font-weight: 600;
}

.page-contact .dir-card__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 245, 208, .4);
}

.page-contact .dir-card__body a:hover {
  color: var(--cyan-soft);
}

/* ---------- 推进节奏 ---------- */
.page-contact .flow-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 44px);
}

.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .flow__step {
  position: relative;
  padding: 16px 18px 16px 22px;
  background: var(--ink-800);
  border-left: 2px solid var(--cyan);
}

.page-contact .flow__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-contact .flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-contact .flow__time {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-contact .flow__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-72);
}

.page-contact .flow-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-contact .flow-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .flow-media__caption {
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 材料清单 ---------- */
.page-contact .mat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .mat-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: clamp(16px, 2.2vw, 22px) 4px;
  border-bottom: 1px solid var(--line);
  transition: background var(--t-fast) var(--ease);
}

.page-contact .mat-item:hover {
  background: rgba(34, 245, 208, .04);
}

.page-contact .mat-item__box {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-900);
  position: relative;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-contact .mat-item__box:hover {
  border-color: var(--cyan);
}

.page-contact .mat-item__box:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .mat-item__box:checked {
  border-color: var(--cyan);
  background: rgba(34, 245, 208, .16);
}

.page-contact .mat-item__box:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
}

.page-contact .mat-item__label {
  display: grid;
  gap: 6px;
  cursor: pointer;
}

.page-contact .mat-item__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

.page-contact .mat-item__use {
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-72);
}

/* ---------- 联系与响应 ---------- */
.page-contact .office-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .office-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--ink-800);
}

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

.page-contact .office-cell__value {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .office-cell__value--mono {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .01em;
  word-break: break-all;
  color: var(--cyan);
}

.page-contact .office-cell__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-56);
}

/* ---------- 常见问题 ---------- */
.page-contact .faq-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-contact .faq-item {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .faq-q {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.55;
  color: var(--paper);
}

.page-contact .faq-a {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-72);
}

.page-contact .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 245, 208, .4);
}

.page-contact .faq-a a:hover {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 宽屏 ---------- */
@media (min-width: 960px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 430px);
    align-items: end;
    gap: clamp(32px, 5vw, 76px);
  }
}

@media (min-width: 860px) {
  .page-contact .dir-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .faq-item {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.5fr);
    gap: clamp(20px, 4vw, 56px);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-contact .flow-wrap {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }
}

@media (min-width: 760px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-contact .flow__step {
    padding: 30px clamp(12px, 1.6vw, 22px) 0 0;
    background: none;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
  }

  .page-contact .flow__step::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 9px;
    height: 9px;
    background: var(--cyan);
    transform: translateY(-50%) rotate(45deg);
  }
}

@media (min-width: 1180px) {
  .page-contact .office-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}