.page-contact {
  --ct-rail-bg: var(--panel);
  --ct-accent: var(--cyan);
  --ct-hero-top: clamp(18px, 3vw, 34px);
}

.page-contact .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: var(--ct-hero-top);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  align-items: center;
  margin-top: clamp(22px, 3.4vw, 46px);
}

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

.page-contact .contact-hero__copy h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-contact .contact-hero__lede {
  margin: clamp(16px, 2vw, 24px) 0 0;
  max-width: 52ch;
  font-size: clamp(15.5px, 1.35vw, 17.5px);
  line-height: 1.72;
  color: var(--fg-dim);
}

.page-contact .contact-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-contact .contact-hero__facts li {
  background: var(--ink);
  padding: 13px 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-dim);
}

.page-contact .contact-hero__facts .mono {
  display: inline-block;
  min-width: 2.4em;
  color: var(--cyan);
  font-size: 16px;
  font-weight: 700;
}

.page-contact .contact-hero__figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.05);
}

/* ---------- 左侧联系栏 + 右侧通道 ---------- */
.page-contact .contact-work__grid {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
}

.page-contact .deal-rail {
  align-self: start;
  border: 1px solid var(--line);
  background: var(--ct-rail-bg);
  padding: clamp(20px, 2.4vw, 30px);
}

.page-contact .deal-rail__title {
  margin: 12px 0 0;
  font-size: clamp(21px, 2.2vw, 26px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-contact .deal-rail__list {
  margin: clamp(18px, 2vw, 24px) 0 0;
  padding: 0;
}

.page-contact .deal-rail__row {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .deal-rail__row:last-child {
  padding-bottom: 4px;
}

.page-contact .deal-rail__row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
}

.page-contact .deal-rail__row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--fg);
  overflow-wrap: anywhere;
}

.page-contact .deal-rail__row dd .mono {
  color: var(--cyan);
}

.page-contact .deal-rail__note {
  margin: clamp(18px, 2vw, 22px) 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line-soft);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fg-dim);
}

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

.page-contact .channels__head {
  margin-bottom: clamp(20px, 2.6vw, 30px);
}

.page-contact .channels__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-contact .channels__intro {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--fg-dim);
}

/* 通道卡片 */
.page-contact .channel {
  position: relative;
  border: 1px solid var(--line);
  border-left: 2px solid var(--ch-accent, var(--line));
  background: transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-contact .channel + .channel {
  margin-top: 12px;
}

.page-contact .channel--cyan { --ch-accent: var(--cyan); }
.page-contact .channel--orange { --ch-accent: var(--orange); }
.page-contact .channel--violet { --ch-accent: var(--violet); }
.page-contact .channel--gold { --ch-accent: var(--gold); }

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  border-color: var(--ch-accent, var(--cyan));
  background: var(--panel);
}

.page-contact .channel__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: clamp(16px, 2vw, 22px) clamp(16px, 2vw, 24px);
  cursor: pointer;
  list-style: none;
}

.page-contact .channel__summary::-webkit-details-marker { display: none; }
.page-contact .channel__summary::marker { content: ""; }

.page-contact .channel__summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .channel__index {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--ch-accent, var(--cyan));
}

.page-contact .channel__label {
  flex: 1 1 190px;
  font-size: clamp(18px, 1.9vw, 23px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--fg);
}

.page-contact .channel__mark {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-left: auto;
}

.page-contact .channel__mark::before,
.page-contact .channel__mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  background: var(--ch-accent, var(--cyan));
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-contact .channel__mark::before { transform: translateY(-50%); }
.page-contact .channel__mark::after { transform: translateY(-50%) rotate(90deg); }
.page-contact .channel[open] .channel__mark::after { transform: translateY(-50%) rotate(0deg); opacity: 0; }

.page-contact .channel__body {
  padding: 0 clamp(16px, 2vw, 24px) clamp(18px, 2.2vw, 26px);
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(16px, 2vw, 22px);
  margin-top: 0;
}

.page-contact .channel__who {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fg-dim);
}

.page-contact .channel__block {
  margin-bottom: 16px;
}

.page-contact .channel__block-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--ch-accent, var(--cyan));
}

.page-contact .channel__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.62;
  color: var(--fg);
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--ch-accent, var(--cyan));
}

.page-contact .channel__how {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg-dim);
}

/* ---------- 响应节奏 ---------- */
.page-contact .contact-cadence__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-contact .contact-cadence__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-contact .contact-cadence__intro {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--fg-dim);
}

.page-contact .contact-cadence__figure {
  margin: clamp(24px, 3vw, 34px) 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .contact-cadence__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.04);
}

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

.page-contact .cadence-row {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2vw, 22px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .cadence-row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .cadence-row__time {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-contact .cadence-row__title {
  margin: 0;
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.3;
  color: var(--fg);
}

.page-contact .cadence-row__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg-dim);
}

/* ---------- 常见问题 ---------- */
.page-contact .contact-faq__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .contact-faq__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-contact .faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-contact .faq-item {
  background: var(--ink);
  padding: clamp(18px, 2.2vw, 26px);
}

.page-contact .faq-item__q {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--fg);
}

.page-contact .faq-item__q::before {
  content: "Q / ";
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-contact .faq-item__a {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fg-dim);
}

/* ---------- 到访与邮寄 ---------- */
.page-contact .contact-visit__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-contact .contact-visit__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-contact .contact-visit__text {
  margin: 16px 0 0;
  max-width: 50ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--fg-dim);
}

.page-contact .contact-visit__note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg);
}

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

.page-contact .visit-map {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .visit-map__bg { fill: #101314; }
.page-contact .visit-map__water { fill: #0B1F1A; }
.page-contact .visit-map__water-label {
  fill: #2E4A43;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
}
.page-contact .visit-map__blocks rect {
  fill: none;
  stroke: #2E4A43;
  stroke-width: 1;
}
.page-contact .visit-map__road {
  stroke: var(--cyan);
  stroke-width: 2;
}
.page-contact .visit-map__road-label {
  fill: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}
.page-contact .visit-map__pin-ring {
  fill: none;
  stroke: var(--orange);
  stroke-width: 2;
}
.page-contact .visit-map__pin-dot { fill: var(--orange); }
.page-contact .visit-map__pin-label {
  fill: #E8F1EE;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-contact .visit-map__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--fg-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-contact .contact-hero__facts {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .channel__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px 22px;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 5fr 6fr;
  }

  .page-contact .contact-cadence__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-contact .contact-visit__grid {
    grid-template-columns: 6fr 6fr;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-work__grid {
    grid-template-columns: minmax(260px, 4fr) 8fr;
    align-items: start;
  }

  .page-contact .deal-rail {
    position: sticky;
    top: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel__mark::before,
  .page-contact .channel__mark::after {
    transition: none;
  }
}
</main>