.page-contact {
  --pc-block-y: clamp(44px, 6.6vw, 84px);
  --pc-gap: clamp(14px, 2vw, 22px);
  display: block;
  color: var(--c-ink);
  background: var(--c-night);
}

.page-contact .pc-block {
  position: relative;
  padding-block: var(--pc-block-y);
}

.page-contact .pc-block--hero {
  padding-block: clamp(26px, 4.6vw, 54px) clamp(24px, 4vw, 44px);
  background:
    radial-gradient(760px 420px at 8% -20%, rgba(56, 242, 208, .16), transparent 65%),
    radial-gradient(620px 380px at 96% 4%, rgba(255, 138, 61, .12), transparent 62%);
}

.page-contact img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.03;
  font-size: clamp(2.2rem, 8.4vw, 4.5rem);
  margin: 14px 0 0;
  color: var(--c-ink);
}

.page-contact .contact-hero__title em {
  font-style: normal;
  color: var(--c-cyan);
}

.page-contact .contact-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(.98rem, 1.6vw, 1.06rem);
  line-height: 1.78;
  color: var(--c-mist);
}

.page-contact .contact-hero__tags {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
}

.page-contact .contact-hero__tag {
  font-family: var(--font-num);
  font-size: .76rem;
  letter-spacing: .04em;
  padding: 7px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-xs);
  background: rgba(14, 42, 37, .68);
  color: var(--c-num);
}

/* ---------- 渠道卡片组 ---------- */
.page-contact .pc-block--channels .section-head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .contact-channels {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  isolation: isolate;
}

.page-contact .contact-channels__glow {
  position: absolute;
  inset: -8% -3% 46% -3%;
  z-index: -1;
  overflow: hidden;
  border-radius: var(--r-lg);
  opacity: .16;
  filter: saturate(.7);
  pointer-events: none;
}

.page-contact .contact-channels__glow img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
}

.page-contact .channel-card--mail {
  border: 2px solid var(--c-cyan);
  border-radius: var(--r-lg);
  box-shadow: 0 26px 64px -46px rgba(56, 242, 208, .95);
  background: linear-gradient(168deg, rgba(14, 42, 37, .96), rgba(6, 26, 21, .96));
}

.page-contact .channel-card--phone,
.page-contact .channel-card--addr {
  background: transparent;
  border-style: dashed;
}

.page-contact .channel-card--phone {
  transform: rotate(-.5deg);
}

.page-contact .channel-card--addr {
  transform: rotate(.4deg);
}

.page-contact .channel-card__label {
  margin: 0;
  font-size: .73rem;
  letter-spacing: .14em;
  color: var(--c-mist);
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 600;
  line-height: 1.3;
  font-size: clamp(1.05rem, 2.6vw, 1.5rem);
  color: var(--c-num);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__value--mail {
  color: var(--c-cyan);
  font-size: clamp(1.08rem, 3.4vw, 1.72rem);
  user-select: all;
}

.page-contact .channel-card__value--addr {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(1rem, 2.2vw, 1.16rem);
  color: var(--c-ink);
  line-height: 1.6;
}

.page-contact .channel-card__copy {
  align-self: flex-start;
  margin: 0;
  padding: 5px 12px;
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--c-cyan);
  border: 1px solid rgba(56, 242, 208, .42);
  border-radius: 999px;
  background: rgba(56, 242, 208, .08);
}

.page-contact .channel-card__note {
  margin: 4px 0 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--c-mist);
  max-width: 54ch;
}

.page-contact .channel-card__facts {
  list-style: none;
  margin: auto 0 0;
  padding: 14px 0 0;
  border-top: 1px dashed var(--c-line);
  display: grid;
  gap: 8px;
  font-size: .86rem;
  color: var(--c-mist);
}

.page-contact .channel-card__facts li {
  display: flex;
  gap: 8px;
  align-items: baseline;
  line-height: 1.6;
}

.page-contact .channel-card__facts li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-cyan);
  transform: translateY(-2px);
}

/* ---------- 问题分流 ---------- */
.page-contact .pc-block--routing .section-head {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

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

.page-contact .routing-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  padding: clamp(18px, 2.8vw, 26px) 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .routing-item__no {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-num);
  font-size: .84rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-cyan);
  padding-top: .28em;
}

.page-contact .routing-item__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  color: var(--c-ink);
}

.page-contact .routing-item__body {
  grid-column: 1 / -1;
  grid-row: 2;
  display: grid;
  gap: 12px;
}

.page-contact .routing-item__desc {
  margin: 0;
  max-width: 62ch;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .routing-item__desc a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .routing-item__tips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .routing-item__tips li {
  font-family: var(--font-num);
  font-size: .75rem;
  letter-spacing: .04em;
  padding: 5px 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-xs);
  color: var(--c-num);
  background: rgba(14, 42, 37, .55);
}

.page-contact .routing-item__tips a {
  color: var(--c-cyan);
}

/* ---------- 提交前准备 ---------- */
.page-contact .prep-grid {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-contact .prep-grid__list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .prep-item__num {
  font-family: var(--font-num);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-orange);
}

.page-contact .prep-item__text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-contact .prep-item__text strong {
  color: var(--c-ink);
  font-weight: 600;
  margin-right: .35em;
}

.page-contact .prep-subject {
  align-self: start;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
  display: grid;
  gap: 12px;
}

.page-contact .prep-subject__sample {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(.92rem, 2.2vw, 1.06rem);
  line-height: 1.6;
  color: var(--c-num);
  padding: 14px 16px;
  border-left: 3px solid var(--c-orange);
  border-radius: var(--r-xs);
  background: rgba(6, 26, 21, .8);
  overflow-wrap: anywhere;
}

.page-contact .prep-subject__note,
.page-contact .prep-subject__link {
  margin: 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-contact .prep-subject__link a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 回复节奏 ---------- */
.page-contact .response-band {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(140deg, rgba(56, 242, 208, .09), transparent 58%),
    var(--c-char);
}

.page-contact .response-band__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.45rem, 4.4vw, 2.2rem);
  color: var(--c-ink);
}

.page-contact .response-band__desc {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-contact .response-band__stats {
  display: grid;
  gap: 14px;
}

.page-contact .response-stat {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-left: 3px solid var(--c-cyan);
  border-radius: var(--r-xs);
  background: rgba(14, 42, 37, .72);
}

.page-contact .response-stat__num {
  font-family: var(--font-num);
  font-weight: 600;
  font-size: clamp(1.3rem, 4vw, 1.75rem);
  color: var(--c-num);
  letter-spacing: .01em;
}

.page-contact .response-stat__label {
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--c-mist);
}

/* ---------- 协作 ---------- */
.page-contact .collab-block {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding-top: clamp(6px, 1.5vw, 14px);
}

.page-contact .collab-block__title {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(1.4rem, 4.2vw, 2.05rem);
  color: var(--c-ink);
}

.page-contact .collab-block__lead p {
  margin: 0;
  max-width: 60ch;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-contact .collab-block__side {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px dashed var(--c-line);
  border-radius: var(--r-md);
  background: rgba(14, 42, 37, .5);
}

.page-contact .collab-block__kicker {
  margin: 0 0 12px;
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--c-mist);
}

.page-contact .collab-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: .9rem;
  line-height: 1.6;
  color: var(--c-ink);
}

.page-contact .collab-roles li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: baseline;
}

.page-contact .collab-roles .num {
  font-family: var(--font-num);
  font-weight: 600;
  color: var(--c-orange);
}

.page-contact .collab-block__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
  font-size: .84rem;
  line-height: 1.7;
  color: var(--c-dim);
}

/* ---------- 地址与备案 ---------- */
.page-contact .pc-block--legal {
  padding-block: clamp(34px, 5vw, 60px);
}

.page-contact .legal-block {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--c-line);
}

.page-contact .legal-block__media {
  border-radius: var(--r-md);
  overflow: hidden;
  opacity: .55;
  filter: saturate(.55);
}

.page-contact .legal-block__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .legal-block__title {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(1.25rem, 3.6vw, 1.7rem);
  color: var(--c-ink);
}

.page-contact .legal-block__text > p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: .92rem;
  line-height: 1.76;
  color: var(--c-mist);
}

.page-contact .legal-facts {
  display: grid;
  gap: 10px;
  margin: 18px 0;
  padding: 0;
}

.page-contact .legal-fact {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dotted var(--c-line);
}

.page-contact .legal-fact dt {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--c-dim);
}

.page-contact .legal-fact dd {
  margin: 0;
  font-size: .9rem;
  color: var(--c-mist);
  overflow-wrap: anywhere;
}

.page-contact .legal-block__note {
  font-size: .84rem;
  line-height: 1.74;
  color: var(--c-dim);
}

.page-contact .legal-block__note a {
  color: var(--c-mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact a:focus-visible,
.page-contact [data-disclosure]:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

/* ---------- 桌面端栅格 ---------- */
@media (min-width: 860px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-contact .channel-card--mail {
    grid-column: 1 / 8;
    grid-row: 1 / 3;
  }

  .page-contact .channel-card--phone {
    grid-column: 8 / 13;
    grid-row: 1 / 2;
  }

  .page-contact .channel-card--addr {
    grid-column: 8 / 13;
    grid-row: 2 / 3;
  }

  .page-contact .routing-item {
    grid-template-columns: 72px 200px minmax(0, 1fr);
    gap: 10px 20px;
    align-items: start;
  }

  .page-contact .routing-item__no {
    grid-column: 1;
  }

  .page-contact .routing-item__title {
    grid-column: 2;
  }

  .page-contact .routing-item__body {
    grid-column: 3;
    grid-row: 1;
  }

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

  .page-contact .response-band {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-contact .response-band__stats {
    grid-template-columns: 1fr;
  }

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

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

@media (min-width: 1180px) {
  .page-contact .channel-card--mail {
    grid-column: 1 / 8;
  }

  .page-contact .channel-card--phone {
    grid-column: 8 / 13;
  }

  .page-contact .channel-card--addr {
    grid-column: 8 / 13;
  }

  .page-contact .response-band__stats {
    grid-template-columns: 1fr;
    max-width: 340px;
    justify-self: end;
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card--phone,
  .page-contact .channel-card--addr {
    transform: none;
  }
}