.page-contact {
  --pc-space: clamp(40px, 7vw, 92px);
  display: block;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
}

.page-contact .wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 clamp(16px, 4.5vw, 44px);
}

.page-contact [data-section] {
  scroll-margin-top: 120px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: calc(var(--step) * 2);
  padding: calc(var(--pc-space) * 0.5) 0 calc(var(--pc-space) * 0.36);
}

.page-contact .section-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 21ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 6.8vw, 70px);
  line-height: 1.08;
  letter-spacing: -0.012em;
  color: var(--text);
}

.page-contact .contact-lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.9vw, 17.5px);
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .hero-banner {
  margin: 0 0 calc(var(--pc-space) * 0.5);
  border: var(--frame) solid var(--line);
  border-radius: var(--r-l);
  aspect-ratio: 16 / 7;
  background:
    linear-gradient(140deg, rgba(34, 211, 238, 0.1), rgba(10, 16, 32, 0) 55%),
    var(--panel);
}

.page-contact .hero-banner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 通用标题与正文 ---------- */
.page-contact .section-title {
  margin: calc(var(--step) * 1.5) 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .prose {
  margin: calc(var(--step) * 2) 0 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-contact .prose a:hover {
  text-decoration-thickness: 2px;
}

/* ---------- 联系信息卡 ---------- */
.page-contact .channels {
  padding: calc(var(--pc-space) * 0.45) 0;
}

.page-contact .channels-head {
  display: grid;
  gap: calc(var(--step) * 1.25);
  margin-bottom: calc(var(--step) * 3);
}

.page-contact .channels-head p {
  margin: 0;
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--archive);
}

.page-contact .contact-card {
  display: grid;
  grid-template-columns: 1fr;
  border: var(--frame) solid var(--line);
  border-radius: var(--r-l);
  background:
    linear-gradient(155deg, rgba(34, 211, 238, 0.08), rgba(10, 16, 32, 0) 46%),
    var(--panel);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-contact .contact-cell {
  display: grid;
  gap: calc(var(--step) * 1.25);
  align-content: start;
  padding: calc(var(--step) * 3) calc(var(--step) * 2.75) calc(var(--step) * 3.25);
}

.page-contact .contact-cell + .contact-cell {
  border-top: var(--frame) solid var(--line);
}

.page-contact .contact-cell-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-contact .contact-cell--hours .contact-cell-label {
  color: var(--archive);
}

.page-contact .contact-mono {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(17px, 4.2vw, 27px);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--text);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .contact-mono--sm {
  font-size: clamp(20px, 4.4vw, 28px);
}

.page-contact .contact-cell-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 注册协助 + 准备清单 ---------- */
.page-contact .prep {
  padding: calc(var(--pc-space) * 0.45) 0;
}

.page-contact .prep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--step) * 4);
}

.page-contact .prep-subtitle {
  margin: calc(var(--step) * 4) 0 calc(var(--step) * 2);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(16px, 2.2vw, 19px);
  letter-spacing: 0;
  color: var(--text);
}

.page-contact .checklist {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border: var(--frame) solid var(--line);
  border-radius: var(--r-m);
  background: var(--panel);
  box-shadow: 4px 4px 0 rgba(8, 13, 26, 0.85);
  overflow: hidden;
}

.page-contact .checklist-item {
  display: flex;
  align-items: flex-start;
  gap: calc(var(--step) * 1.5);
  padding: calc(var(--step) * 1.75) calc(var(--step) * 2);
  border-bottom: 2px solid var(--line);
  transition: background 180ms ease;
}

.page-contact .checklist-item:last-child {
  border-bottom: 0;
}

.page-contact .checklist-item:hover {
  background: rgba(34, 211, 238, 0.06);
}

.page-contact .checklist-item input {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  position: relative;
  appearance: none;
  -webkit-appearance: none;
  border: 2px solid var(--line);
  border-radius: var(--r-s);
  background: var(--ink);
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease;
}

.page-contact .checklist-item input:checked {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.16);
}

.page-contact .checklist-item input:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(42deg);
}

.page-contact .checklist-item input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .checklist-item label {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
  cursor: pointer;
}

.page-contact .checklist-item input:checked + label {
  color: var(--archive);
  text-decoration: line-through;
  text-decoration-color: var(--line);
}

.page-contact .prep-figure {
  margin: 0;
  border: var(--frame) solid var(--line);
  border-radius: var(--r-m);
  background:
    linear-gradient(180deg, rgba(124, 144, 174, 0.12), rgba(10, 16, 32, 0) 60%),
    var(--panel);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

.page-contact .prep-figure figcaption {
  padding: calc(var(--step) * 1.75) calc(var(--step) * 2);
  border-top: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--archive);
}

/* ---------- 支持范围 ---------- */
.page-contact .support {
  padding: calc(var(--pc-space) * 0.45) 0;
}

.page-contact .support-head {
  display: grid;
  gap: calc(var(--step));
}

.page-contact .support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--step) * 2);
  margin-top: calc(var(--step) * 3.5);
}

.page-contact .support-card {
  padding: calc(var(--step) * 2.5) calc(var(--step) * 2.75) calc(var(--step) * 2.75);
  border: var(--frame) solid var(--line);
  border-radius: var(--r-m);
  background: var(--panel);
  box-shadow: 4px 4px 0 rgba(8, 13, 26, 0.85);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.page-contact .support-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.page-contact .support-card h3 {
  display: flex;
  align-items: baseline;
  gap: calc(var(--step));
  margin: 0 0 calc(var(--step) * 1.25);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.4;
  color: var(--text);
}

.page-contact .support-card h3::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--cyan);
  transform: translateY(-3px);
}

.page-contact .support-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应节奏 ---------- */
.page-contact .hours {
  padding: calc(var(--pc-space) * 0.5) 0;
}

.page-contact .hours-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--step) * 3);
  padding: calc(var(--step) * 3.5) calc(var(--step) * 2.75);
  border: var(--frame) solid var(--line);
  border-radius: var(--r-l);
  background:
    linear-gradient(160deg, rgba(52, 211, 153, 0.09), rgba(10, 16, 32, 0) 52%),
    var(--panel);
}

.page-contact .hours-readout {
  display: grid;
  gap: calc(var(--step) * 0.8);
  align-content: start;
}

.page-contact .hours-number {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(26px, 5.4vw, 40px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--green);
}

.page-contact .hours-caption {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--archive);
}

/* ---------- 地址与备案 ---------- */
.page-contact .address {
  padding: calc(var(--pc-space) * 0.45) 0;
}

.page-contact .address-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--step) * 4);
}

.page-contact .address-card {
  padding: calc(var(--step) * 3) calc(var(--step) * 2.75) calc(var(--step) * 3.25);
  border: var(--frame) solid var(--line);
  border-left: 4px solid var(--archive);
  border-radius: var(--r-m);
  background: var(--panel);
}

.page-contact .address-lines {
  display: grid;
  gap: calc(var(--step) * 0.75);
  margin: calc(var(--step) * 2.5) 0 0;
  font-style: normal;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
}

.page-contact .address-lines span {
  display: block;
  padding-left: calc(var(--step) * 1.75);
  border-left: 2px solid var(--line);
}

.page-contact .address-note {
  margin: calc(var(--step) * 2.5) 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--archive);
}

.page-contact .address-side .prose {
  margin-top: 0;
}

.page-contact .address-side .prose + .prose {
  margin-top: calc(var(--step) * 2.5);
}

/* ---------- 返回顶部 ---------- */
.page-contact .backtop-row {
  display: flex;
  padding: calc(var(--pc-space) * 0.3) 0 calc(var(--pc-space) * 0.7);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .hours-inner {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    gap: calc(var(--step) * 5);
    align-items: start;
    padding: calc(var(--step) * 5) calc(var(--step) * 4);
  }

  .page-contact .address-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    gap: calc(var(--step) * 6);
    align-items: start;
  }

  .page-contact .address-side .prose {
    margin-top: calc(var(--step) * 1.5);
  }

  .page-contact .address-side .prose + .prose {
    margin-top: calc(var(--step) * 3);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-card {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr) minmax(0, 0.72fr);
  }

  .page-contact .contact-cell + .contact-cell {
    border-top: 0;
    border-left: var(--frame) solid var(--line);
  }

  .page-contact .prep-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: calc(var(--step) * 6);
    align-items: start;
  }
}

@media (max-width: 480px) {
  .page-contact .contact-mono {
    font-size: 16px;
  }

  .page-contact .contact-cell {
    padding: calc(var(--step) * 2.5) calc(var(--step) * 2) calc(var(--step) * 2.75);
  }
}