.page-contact {
  --pc-line: rgba(201, 216, 230, 0.16);
  --pc-line-strong: rgba(201, 216, 230, 0.3);
  color: var(--body-text);
  font-family: var(--font-body);
}

.page-contact .section {
  position: relative;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  padding-top: clamp(20px, 4vw, 52px);
  padding-bottom: clamp(48px, 7vw, 92px);
}

.page-contact .contact-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 5.6vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 10px 0 clamp(16px, 2vw, 24px);
  max-width: 18ch;
}

.page-contact .contact-hero__lead {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.78;
  max-width: 60ch;
  margin: 0 0 clamp(28px, 4vw, 52px);
  color: var(--body-text);
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: 1px solid var(--pc-line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-contact .contact-hero__figure .media-frame__caption {
  padding: 12px clamp(14px, 2vw, 22px) 14px;
  border-top: 1px solid var(--pc-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 联系渠道 ---------- */

.page-contact .contact-channels {
  padding-block: clamp(32px, 5vw, 64px);
}

.page-contact .contact-channels__grid {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
}

.page-contact .contact-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--pc-line);
  padding: clamp(20px, 3vw, 34px);
  transition: transform var(--shift), border-color var(--shift);
}

.page-contact .contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-contact .contact-card .eyebrow {
  margin: 0 0 12px;
}

.page-contact .contact-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.35;
  color: var(--white);
  margin: 0 0 12px;
}

.page-contact .contact-card__title--sm {
  font-size: clamp(16px, 1.7vw, 20px);
}

.page-contact .contact-card__intro,
.page-contact .contact-card__text {
  font-size: 15px;
  line-height: 1.78;
  color: var(--body-text);
  margin: 0 0 10px;
}

.page-contact .contact-card--mail {
  background: linear-gradient(148deg, rgba(23, 38, 60, 0.92) 0%, rgba(11, 43, 42, 0.58) 100%);
  border-color: var(--line-mid);
  overflow: hidden;
}

.page-contact .contact-card--mail::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(43, 240, 208, 0) 78%);
}

.page-contact .contact-card--mail h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 1.8vw, 22px);
  color: var(--white);
  margin: 0 0 12px;
}

.page-contact .contact-mail {
  margin: clamp(18px, 2.6vw, 30px) 0 14px;
}

.page-contact .contact-mail__text {
  display: inline-block;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: clamp(19px, 4vw, 42px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--white);
  padding-bottom: 6px;
  border-bottom: 3px solid var(--cyan);
  overflow-wrap: break-word;
  word-break: break-word;
}

.page-contact .contact-side {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
}

@media (min-width: 900px) {
  .page-contact .contact-channels__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-mail {
    margin-left: -0.35rem;
  }
}

/* ---------- 通用章节标题 ---------- */

.page-contact .section-head {
  max-width: 64ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-contact .section-head h2,
.page-contact .fix-layout h2,
.page-contact .flow-layout h2,
.page-contact .faq-layout h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 10px 0 clamp(14px, 1.8vw, 20px);
}

.page-contact .section-head__lead,
.page-contact .fix-layout__lead {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--body-text);
  margin: 0;
}

/* ---------- 商务合作 ---------- */

.page-contact .coop-grid {
  display: grid;
  gap: clamp(14px, 1.8vw, 22px);
}

.page-contact .coop-card {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--panel);
  border: 1px solid var(--pc-line);
  border-left: 2px solid var(--line-mid);
  transition: transform var(--shift), border-color var(--shift), background-color var(--shift);
}

.page-contact .coop-card:hover {
  transform: translateY(-4px);
  border-left-color: var(--cyan);
  border-color: var(--pc-line-strong);
  border-left-color: var(--cyan);
}

.page-contact .coop-card__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-contact .coop-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 1.8vw, 22px);
  color: var(--white);
  margin: 0 0 12px;
}

.page-contact .coop-card__text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
  margin: 0 0 12px;
}

.page-contact .coop-card .annotation {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--pc-line);
}

.page-contact .coop-note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: clamp(16px, 2.2vw, 24px) clamp(18px, 2.4vw, 28px);
  background: var(--glass-teal);
  border: 1px solid rgba(43, 240, 208, 0.24);
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-contact .coop-note__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-right: 10px;
}

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

/* ---------- 内容纠错 ---------- */

.page-contact .fix-layout {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

.page-contact .fix-layout__lead {
  margin-bottom: 14px;
}

.page-contact .fix-panel {
  background: var(--panel);
  border: 1px solid var(--pc-line);
  padding: clamp(8px, 1.6vw, 14px) clamp(18px, 2.6vw, 30px) clamp(18px, 2.6vw, 30px);
}

.page-contact .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .check-list__item {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .check-list__item:last-child {
  border-bottom: none;
}

.page-contact .check-list__label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(13px, 1.6vw, 17px) 0;
  cursor: pointer;
}

.page-contact .check-list__box {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin: 4px 0 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--line-mid);
  background: transparent;
  cursor: pointer;
  transition: background-color var(--shift), border-color var(--shift);
}

.page-contact .check-list__box:hover {
  border-color: var(--cyan);
}

.page-contact .check-list__box:checked {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .check-list__box:checked::after {
  content: "";
  display: block;
  width: 4px;
  height: 9px;
  margin: 1px 0 0 6px;
  border: solid var(--ink);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

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

.page-contact .check-list__text {
  font-size: 15px;
  line-height: 1.78;
  color: var(--body-text);
  transition: color var(--shift);
}

.page-contact .check-list__text strong {
  color: var(--white);
  font-weight: 700;
}

.page-contact .check-list__box:checked ~ .check-list__text {
  color: var(--muted);
}

.page-contact .check-list__box:checked ~ .check-list__text strong {
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-contact .fix-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

/* ---------- 合作流程 ---------- */

.page-contact .flow-layout {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-contact .flow {
  list-style: none;
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(20px, 2.6vw, 30px);
}

.page-contact .flow::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(43, 240, 208, 0.6) 45%, rgba(43, 240, 208, 0.1) 100%);
}

.page-contact .flow__step {
  position: relative;
  padding-left: 36px;
}

.page-contact .flow__dot {
  position: absolute;
  left: 0;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink);
  transition: background-color var(--shift), box-shadow var(--shift);
}

.page-contact .flow__step:hover .flow__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(43, 240, 208, 0.14);
}

.page-contact .flow__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin: 0 0 6px;
}

.page-contact .flow__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.8vw, 21px);
  color: var(--white);
  margin: 0 0 8px;
}

.page-contact .flow__text {
  font-size: 15px;
  line-height: 1.78;
  color: var(--body-text);
  margin: 0;
}

.page-contact .flow__meta {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--pc-line);
  transition: border-color var(--shift), color var(--shift);
}

.page-contact .flow__step:hover .flow__meta {
  border-left-color: var(--cyan);
  color: var(--body-text);
}

.page-contact .flow-layout__figure {
  margin: 0;
  border: 1px solid var(--pc-line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-contact .flow-layout__figure .media-frame__caption {
  padding: 12px clamp(14px, 2vw, 20px) 14px;
  border-top: 1px solid var(--pc-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-contact .flow-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    align-items: start;
  }
}

/* ---------- 常见联系问题 ---------- */

.page-contact .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

.page-contact .faq-layout__head .annotation {
  margin: 0;
}

.page-contact .faq-item {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .faq-item:first-child {
  border-top: 1px solid var(--pc-line);
}

.page-contact .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(16px, 2vw, 22px) 0;
  font-family: var(--font-display);
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
  transition: color var(--shift);
}

.page-contact .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-contact .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--cyan);
}

.page-contact .faq-item[open] > summary::after {
  content: "\2212";
}

.page-contact .faq-item > summary:hover {
  color: var(--cyan);
}

.page-contact .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-contact .faq-item__body {
  padding: 0 0 clamp(16px, 2vw, 22px);
  padding-right: clamp(0px, 4vw, 52px);
}

.page-contact .faq-item__body p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--body-text);
  margin: 0;
}

@media (min-width: 960px) {
  .page-contact .faq-layout {
    grid-template-columns: minmax(0, 0.68fr) minmax(0, 1.32fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .coop-card,
  .page-contact .flow__dot,
  .page-contact .flow__meta,
  .page-contact .check-list__box,
  .page-contact .check-list__text {
    transition: none;
  }

  .page-contact .contact-card:hover,
  .page-contact .coop-card:hover {
    transform: none;
  }
}