.page-contact {
  --c-shell: 780px;
  --c-accent: var(--blue);
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-contact .c-shell {
  width: 100%;
  max-width: var(--c-shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.page-contact .c-hero {
  --c-accent: var(--orange);
  background: var(--tea-lite);
  border-bottom: 1px solid var(--line-blue);
  padding: clamp(36px, 7vw, 68px) 0 clamp(40px, 8vw, 84px);
}

.page-contact .c-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--blue);
  margin: 18px 0 0;
  max-width: 14em;
}

.page-contact .c-lede {
  font-size: clamp(16.5px, 2.1vw, 18.5px);
  line-height: 1.9;
  margin: 22px 0 0;
  max-width: 34em;
}

.page-contact .c-hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 28px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--grass-deep);
}

.page-contact .lamp {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  background: var(--grass);
  animation: c-lamp 3.2s var(--ease) infinite;
}

@keyframes c-lamp {
  0%, 70%, 100% { opacity: 1; }
  85% { opacity: .35; }
}

/* 01 深蓝区块 */
.page-contact .c-band {
  --c-accent: var(--orange);
  background: var(--blue);
  color: var(--white);
  padding: clamp(52px, 9vw, 100px) 0;
}

.page-contact .c-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(30px, 5vw, 48px);
}

.page-contact .c-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(38px, 9vw, 68px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--tea);
}

.page-contact .c-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.25;
  color: var(--blue);
  margin: 0;
}

.page-contact .c-head h2::before {
  content: "";
  display: inline-block;
  width: 2px;
  height: .92em;
  margin-right: 14px;
  vertical-align: -.06em;
  background: var(--c-accent);
}

.page-contact .c-head p {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.9;
  max-width: 32em;
}

.page-contact .c-band .c-num { color: var(--orange); }
.page-contact .c-band .c-head h2 { color: var(--white); }
.page-contact .c-band .c-head p { color: rgba(255, 255, 255, .78); }

/* 折叠组 */
.page-contact .c-folds {
  border-top: 1px solid var(--line-white);
}

.page-contact .c-fold-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-contact .fold {
  border-bottom: 1px solid var(--line-white);
}

.page-contact .fold-head {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 22px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--white);
  font-family: var(--font-display);
  font-size: clamp(17px, 2.5vw, 21px);
  font-weight: 800;
  line-height: 1.4;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .fold-head:hover,
.page-contact .fold-head:focus-visible {
  color: var(--orange-lite);
}

.page-contact .c-fold-label {
  flex: 0 0 auto;
}

.page-contact .c-fold-hint {
  margin-left: auto;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .62);
  text-align: right;
}

.page-contact .fold-mark {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease);
}

.page-contact .fold-head[aria-expanded="true"] .fold-mark {
  transform: rotate(-135deg);
}

.page-contact .fold-inner {
  padding: 0 0 26px;
  max-width: 36em;
  font-size: 16.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .8);
}

.page-contact .fold-inner p {
  margin: 0 0 12px;
}

.page-contact .fold-inner ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .fold-inner li {
  position: relative;
  padding-left: 22px;
  margin: 6px 0;
}

.page-contact .fold-inner li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .9em;
  width: 10px;
  height: 2px;
  background: var(--orange);
}

.page-contact .c-inline-link {
  margin: 16px 0 0;
  font-size: 15.5px;
}

.page-contact .c-band a {
  color: var(--orange-lite);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 216, 184, .5);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .c-band a:hover,
.page-contact .c-band a:focus-visible {
  color: var(--white);
  border-color: var(--white);
}

/* 02 与 04 白底区块 */
.page-contact .c-sec {
  --c-accent: var(--tea);
  padding: clamp(52px, 9vw, 96px) 0;
}

.page-contact .c-sec-tea {
  --c-accent: var(--blue);
  background: var(--tea);
}

.page-contact .c-sec a {
  color: var(--blue-mid);
  text-decoration: none;
  border-bottom: 1px solid var(--line-blue);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .c-sec a:hover,
.page-contact .c-sec a:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}

/* 名片式信息块 */
.page-contact .c-cards {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-contact .c-card {
  position: relative;
  display: grid;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--line-blue);
  padding: clamp(22px, 4vw, 34px);
}

.page-contact .c-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-accent);
}

.page-contact .c-cards .c-card:nth-child(1) { --c-accent: var(--blue); }
.page-contact .c-cards .c-card:nth-child(2) { --c-accent: var(--orange); }
.page-contact .c-cards .c-card:nth-child(3) { --c-accent: var(--grass); }

.page-contact .c-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(16px, 2.3vw, 19px);
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--blue);
}

.page-contact .c-big {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(21px, 5.2vw, 34px);
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--blue);
  word-break: break-all;
}

.page-contact .c-big-addr {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(17px, 3.6vw, 22px);
  line-height: 1.7;
  word-break: normal;
}

.page-contact .c-note {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 32em;
}

/* 城市坐标线 */
.page-contact .c-coord {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 8px;
}

.page-contact .c-coord .seg {
  flex: 1;
  height: 1px;
  background: var(--line-blue);
}

.page-contact .c-coord .node {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-contact .c-coord-cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink);
}

.page-contact .c-figure-wide {
  margin: clamp(30px, 5vw, 46px) 0 0;
}

.page-contact .c-figure-wide img,
.page-contact .c-close img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .c-foot-note {
  margin: clamp(26px, 4vw, 36px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-blue);
  font-size: 15.5px;
  line-height: 1.9;
  max-width: 36em;
}

/* 03 准备清单 */
.page-contact .c-prep {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .c-prep > li {
  display: grid;
  gap: 8px;
  padding: 24px 0;
  border-top: 1px solid rgba(18, 48, 79, .22);
}

.page-contact .c-prep > li:last-child {
  border-bottom: 1px solid rgba(18, 48, 79, .22);
}

.page-contact .c-prep-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--blue);
}

.page-contact .c-prep h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 800;
  color: var(--blue);
}

.page-contact .c-prep p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  max-width: 34em;
}

.page-contact .c-sec-tea .c-foot-note {
  border-top-color: rgba(18, 48, 79, .22);
}

/* 04 合作双栏 */
.page-contact .c-duo {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-contact .c-duo-item {
  padding-left: 18px;
  border-left: 2px solid var(--c-accent);
}

.page-contact .c-duo-item:nth-child(1) { --c-accent: var(--blue); }
.page-contact .c-duo-item:nth-child(2) { --c-accent: var(--orange); }

.page-contact .c-duo-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 800;
  color: var(--blue);
}

.page-contact .c-duo-item p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.9;
}

.page-contact .c-duo-meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ink);
  margin: 0;
}

.page-contact .c-callout {
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 18px 20px;
  background: var(--orange-lite);
  border-left: 3px solid var(--orange);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--blue-deep);
}

.page-contact .c-close {
  margin: 0;
  border-top: 1px solid var(--line-blue);
}

.page-contact .c-close figcaption {
  padding: 16px var(--gutter) 0;
  max-width: var(--c-shell);
  margin: 0 auto;
}

@media (min-width: 720px) {
  .page-contact .c-head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 30px;
    align-items: start;
  }

  .page-contact .c-num {
    grid-row: span 2;
    padding-top: 4px;
  }

  .page-contact .c-card {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "title big"
      "note big";
    align-items: center;
    column-gap: 34px;
  }

  .page-contact .c-card h3 { grid-area: title; }
  .page-contact .c-big { grid-area: big; text-align: right; margin: 0; max-width: 22em; }
  .page-contact .c-note { grid-area: note; margin: 8px 0 0; }

  .page-contact .c-prep > li {
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 20px;
    align-items: baseline;
  }

  .page-contact .c-prep p {
    grid-column: 2;
  }

  .page-contact .c-duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-contact .c-shell {
    padding-inline: 0;
  }

  .page-contact .c-close figcaption {
    padding-inline: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .lamp { animation: none; }
  .page-contact .fold-mark,
  .page-contact .fold-head { transition: none; }
}