.page-contact {
  --rail-w: 320px;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-17);
  line-height: 1.85;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  display: grid;
  gap: 24px;
  align-items: end;
  padding: 20px 0 34px;
  border-bottom: 1px solid var(--line-strong);
}

.page-contact .contact-intro__copy h1 {
  margin: 10px 0 14px;
  font-size: var(--fs-28);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--blue);
}

.page-contact .contact-intro__lead {
  max-width: 48ch;
  margin: 0;
  color: var(--slate);
  font-size: var(--fs-17);
  line-height: 1.85;
}

.page-contact .contact-intro__figure {
  margin: 0;
  border: 1px solid var(--line);
  background-color: var(--white);
}

.page-contact .contact-intro__figure img {
  display: block;
  width: 100%;
  height: 190px;
  object-fit: cover;
}

@media (min-width: 640px) {
  .page-contact .contact-intro__copy h1 {
    font-size: var(--fs-40);
  }
  .page-contact .contact-intro__figure img {
    height: 230px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-intro {
    grid-template-columns: minmax(0, 1fr) 440px;
    gap: 56px;
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-intro__copy h1 {
    font-size: var(--fs-56);
  }
}

/* ---------- 双栏骨架 ---------- */
.page-contact .contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: 44px;
  padding-bottom: 76px;
  align-items: start;
}

@media (min-width: 960px) {
  .page-contact .contact-shell {
    grid-template-columns: minmax(0, 1fr) var(--rail-w);
    gap: 56px;
  }
}

.page-contact .contact-main {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-contact .contact-block {
  margin-bottom: 60px;
  min-width: 0;
}

.page-contact .contact-block:last-child {
  margin-bottom: 0;
}

.page-contact .contact-block__head {
  margin-bottom: 20px;
}

.page-contact .contact-block__head h2 {
  margin: 6px 0 10px;
  font-size: var(--fs-28);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--blue);
}

.page-contact .contact-block__head p {
  max-width: 62ch;
  margin: 0;
  color: var(--slate);
  font-size: var(--fs-17);
}

.page-contact .contact-block > p {
  max-width: 62ch;
  margin: 0 0 18px;
}

.page-contact .subhead {
  margin: 26px 0 12px;
  font-size: var(--fs-21);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

/* ---------- 通道卡 ---------- */
.page-contact .channel-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 800px) {
  .page-contact .channel-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 22px 20px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
  transition: transform var(--t), border-color var(--t), background-color var(--t);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--yellow);
  background-color: var(--paper);
}

.page-contact .channel-card__num {
  align-self: flex-start;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  line-height: 1.6;
  letter-spacing: 0.14em;
  background-color: var(--yellow);
  color: var(--ink);
}

.page-contact .channel-card h3 {
  margin: 14px 0 8px;
  font-size: var(--fs-21);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .channel-card p {
  margin: 0 0 14px;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .channel-card .channel-card__prep-label {
  margin: 6px 0 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-contact .channel-card__prep {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .channel-card__prep li {
  position: relative;
  padding: 6px 0 6px 14px;
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-contact .channel-card__prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 1px;
  background-color: var(--teal);
}

.page-contact .channel-card__link {
  margin-top: auto;
  align-self: flex-start;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 2px solid var(--yellow);
  transition: color var(--t), border-color var(--t);
}

.page-contact .channel-card__link:hover {
  color: var(--ink);
  border-bottom-color: var(--blue);
}

/* ---------- 联系方式横条 ---------- */
.page-contact .contact-line {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 20px;
  background-color: var(--white);
  border: 1px solid var(--line-strong);
}

.page-contact .contact-line__key {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.12em;
  color: var(--paper);
  background-color: var(--blue);
  white-space: nowrap;
}

.page-contact .contact-line__val {
  display: flex;
  flex: 1 1 240px;
  align-items: center;
  min-width: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-17);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

/* ---------- 准备材料清单 ---------- */
.page-contact .prep-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .prep-list li {
  position: relative;
  padding: 11px 0 11px 28px;
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-contact .prep-list li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 20px;
  width: 8px;
  height: 8px;
  background-color: var(--yellow);
}

/* ---------- 提示块 ---------- */
.page-contact .callout {
  margin: 0 0 22px;
  padding: 20px 22px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
}

.page-contact .callout__key {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.12em;
  color: var(--slate);
}

.page-contact .callout__value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-contact .callout p:last-child {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 折叠面板 ---------- */
.page-contact .fold {
  margin-top: 8px;
  background-color: var(--white);
  border: 1px solid var(--line);
}

.page-contact .fold > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  font-size: var(--fs-17);
  font-weight: 800;
  color: var(--blue);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--t), color var(--t);
}

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

.page-contact .fold > summary:hover {
  background-color: var(--paper);
  color: var(--ink);
}

.page-contact .fold > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-21);
  line-height: 1;
  color: var(--yellow);
}

.page-contact .fold[open] > summary::after {
  content: "–";
  color: var(--blue);
}

.page-contact .fold__steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0 18px 16px;
}

.page-contact .fold__steps li {
  position: relative;
  padding: 12px 0 12px 46px;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--slate);
  border-bottom: 1px solid var(--line);
}

.page-contact .fold__steps li:last-child {
  border-bottom: 0;
}

.page-contact .fold__steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 14px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--blue);
  border: 1px solid var(--line);
}

.page-contact .fold__steps strong {
  color: var(--ink);
}

/* ---------- 协作方式 ---------- */
.page-contact .media-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (min-width: 700px) {
  .page-contact .media-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .media-item {
  padding: 18px 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
}

.page-contact .media-item h3 {
  margin: 0 0 8px;
  font-size: var(--fs-17);
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .media-item p {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .media-note {
  margin: 18px 0 0;
  padding-left: 14px;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--slate);
  border-left: 2px solid var(--yellow);
}

/* ---------- 地点 ---------- */
.page-contact .location {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

@media (min-width: 820px) {
  .page-contact .location {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    gap: 32px;
    align-items: start;
  }
}

.page-contact .location__copy {
  min-width: 0;
}

.page-contact .location__copy address {
  margin: 0 0 18px;
  padding-left: 14px;
  font-style: normal;
  font-size: var(--fs-21);
  font-weight: 800;
  line-height: 1.5;
  color: var(--ink);
  border-left: 3px solid var(--yellow);
}

.page-contact .location__copy p {
  max-width: 58ch;
  margin: 0 0 14px;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .location__copy p:last-child {
  margin-bottom: 0;
}

.page-contact .location__figure {
  margin: 0;
  background-color: var(--white);
  border: 1px solid var(--line);
}

.page-contact .location__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .location-map {
  margin: 26px 0 0;
}

.page-contact .route-map {
  display: block;
  width: 100%;
  height: auto;
  background-color: var(--paper);
  border: 1px solid var(--line);
}

.page-contact .location-map figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 右栏 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 18px;
  align-self: start;
  min-width: 0;
  padding-top: 26px;
  border-top: 1px solid var(--line-strong);
}

@media (min-width: 960px) {
  .page-contact .contact-rail {
    position: sticky;
    top: 96px;
    padding-top: 0;
    padding-left: 28px;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
  }
}

.page-contact .rail-card {
  padding: 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
}

.page-contact .rail-card--dark {
  background-color: var(--blue-deep);
  border-color: var(--blue-deep);
}

.page-contact .rail-card__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--slate);
  border-bottom: 1px solid var(--line);
}

.page-contact .rail-card--dark .rail-card__title {
  color: var(--line-dim);
  border-bottom-color: var(--line-dim);
}

.page-contact .rail-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.page-contact .rail-list dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--line-dim);
}

.page-contact .rail-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-15);
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .rail-notes {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .rail-notes li {
  position: relative;
  padding-left: 14px;
  font-size: var(--fs-15);
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .rail-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  background-color: var(--yellow);
}

.page-contact .rail-links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .rail-links li {
  border-bottom: 1px solid var(--line);
}

.page-contact .rail-links a {
  display: block;
  padding: 11px 0;
  font-size: var(--fs-15);
  line-height: 1.6;
  color: var(--blue);
  text-decoration: none;
  transition: color var(--t), padding-left var(--t);
}

.page-contact .rail-links a:hover {
  color: var(--ink);
  padding-left: 6px;
}

/* ---------- 焦点与降级 ---------- */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .fold > summary,
  .page-contact .rail-links a {
    transition: none;
  }
  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within {
    transform: none;
  }
  .page-contact .rail-links a:hover {
    padding-left: 0;
  }
}