.page-contact {
  --contact-line: 2px solid var(--ink-700);
  --contact-gap: clamp(16px, 2.4vw, 28px);
  background: var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(48px, 8vw, 92px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(22px, 4vw, 42px) 0 clamp(22px, 4vw, 38px) clamp(14px, 2.6vw, 26px);
}
.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(24px, 4vw, 44px);
  width: 3px;
  height: clamp(52px, 9vw, 96px);
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}
.page-contact .contact-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(27px, 5vw, 52px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  max-width: 19em;
}
.page-contact .contact-hero__lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}
.page-contact .contact-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .contact-hero__chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 6px 11px;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  color: var(--paper);
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
  margin-top: clamp(24px, 4vw, 44px);
}

/* ---------- 反馈单 ---------- */
.page-contact .contact-form {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  border: var(--contact-line);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
}
.page-contact .contact-form::after {
  content: "";
  position: absolute;
  top: -2px;
  right: -2px;
  width: 88px;
  height: 6px;
  background: var(--orange);
}
.page-contact .contact-form__head {
  padding-bottom: 16px;
  border-bottom: var(--contact-line);
}
.page-contact .contact-form__title {
  margin: 8px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.35;
  letter-spacing: 0.02em;
}
.page-contact .contact-form__sub {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-contact .contact-field {
  position: relative;
  padding: 16px 0 18px clamp(30px, 4vw, 40px);
  border-bottom: 1px solid var(--hairline);
}
.page-contact .contact-field:last-of-type {
  border-bottom: 0;
}
.page-contact .contact-field__num {
  position: absolute;
  left: 0;
  top: 19px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.page-contact .contact-field__label {
  display: block;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.03em;
}
.page-contact .contact-field__hint {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-contact .contact-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.page-contact .contact-form__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: var(--contact-line);
}
.page-contact .contact-form__foot-note {
  flex: 1 1 240px;
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 右侧三条通道 ---------- */
.page-contact .contact-side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  align-content: start;
}
.page-contact .contact-side__title {
  margin: 0 0 2px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-contact .contact-channel {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  border: var(--contact-line);
  background: var(--ink-800);
  transition: box-shadow 0.22s var(--ease), transform 0.22s var(--ease), border-color 0.22s var(--ease);
}
.page-contact .contact-channel:hover,
.page-contact .contact-channel:focus-within {
  border-color: var(--cyan-deep);
  box-shadow: var(--shadow-hard-lift);
  transform: translate(-2px, -2px);
}
.page-contact .contact-channel__mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--cyan);
  background: var(--ink-900);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  transition: transform 0.22s var(--ease);
}
.page-contact .contact-channel:hover .contact-channel__mark {
  transform: translate(2px, -2px);
}
.page-contact .contact-channel__body {
  min-width: 0;
}
.page-contact .contact-channel__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.04em;
}
.page-contact .contact-channel__value {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}
.page-contact .contact-channel__desc {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-contact .contact-channel--flare .contact-channel__mark {
  border-color: var(--orange);
  color: var(--orange);
}
.page-contact .contact-channel--flare .contact-channel__value {
  color: var(--orange-soft);
}
.page-contact .contact-side__media {
  margin: 4px 0 0;
  border: var(--contact-line);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}
.page-contact .contact-side__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 全宽清单条 ---------- */
.page-contact .contact-checklist {
  margin: clamp(38px, 6vw, 72px) 0;
  padding: clamp(26px, 4vw, 46px) 0;
  background: var(--ink-800);
  border-top: var(--contact-line);
  border-bottom: var(--contact-line);
}
.page-contact .contact-checklist__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  margin-bottom: clamp(16px, 2.6vw, 26px);
}
.page-contact .contact-checklist__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  letter-spacing: 0.02em;
  line-height: 1.35;
}
.page-contact .contact-checklist__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.page-contact .contact-checklist__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  padding: 13px 0;
  border-top: 1px solid var(--hairline);
  font-size: 15px;
  line-height: 1.75;
}
.page-contact .contact-checklist__mark {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  line-height: 1.7;
}
.page-contact .contact-checklist__note {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 处理时段 ---------- */
.page-contact .contact-window {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
  padding: clamp(22px, 3vw, 34px);
  border: var(--contact-line);
  background:
    linear-gradient(120deg, rgba(31, 224, 192, 0.09), transparent 58%),
    var(--ink-800);
}
.page-contact .contact-window__clock {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  font-family: var(--font-mono);
  color: var(--cyan);
}
.page-contact .contact-window__time {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
}
.page-contact .contact-window__dash {
  font-size: clamp(18px, 3vw, 26px);
  color: var(--mist);
}
.page-contact .contact-window__day {
  display: block;
  width: 100%;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.page-contact .contact-window__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 25px);
  letter-spacing: 0.02em;
  line-height: 1.4;
}
.page-contact .contact-window__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-contact .contact-window__list strong {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 合作洽谈 ---------- */
.page-contact .contact-coop {
  margin-top: clamp(40px, 6vw, 76px);
}
.page-contact .contact-coop__band {
  display: block;
  width: 100%;
  height: clamp(88px, 15vw, 168px);
  object-fit: cover;
  border: var(--contact-line);
  box-shadow: var(--shadow-hard);
}
.page-contact .contact-coop__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
  margin-top: clamp(22px, 3vw, 34px);
}
.page-contact .contact-coop__title {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.35;
  letter-spacing: 0.02em;
  max-width: 22em;
}
.page-contact .contact-coop__text {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}
.page-contact .contact-coop__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-contact .contact-coop__list li {
  padding: 13px 0;
  border-top: 1px solid var(--hairline);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-contact .contact-coop__key {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange-soft);
}
.page-contact .contact-coop__aside {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: var(--contact-line);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
}
.page-contact .contact-coop__aside::before {
  content: "";
  position: absolute;
  left: -2px;
  top: -2px;
  width: 6px;
  height: 64px;
  background: var(--cyan);
}
.page-contact .contact-coop__aside-title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.03em;
}
.page-contact .contact-coop__aside-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}
.page-contact .contact-coop__aside-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 继续阅读索引 ---------- */
.page-contact .contact-next {
  margin-top: clamp(40px, 6vw, 76px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: var(--contact-line);
}
.page-contact .contact-next__heading {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 25px);
  letter-spacing: 0.02em;
  line-height: 1.4;
}
.page-contact .contact-next__list {
  list-style: none;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
}
.page-contact .contact-next__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: baseline;
  gap: 2px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
  text-decoration: none;
  color: var(--paper);
}
.page-contact .contact-next__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}
.page-contact .contact-next__title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.03em;
  transition: color 0.2s var(--ease);
}
.page-contact .contact-next__desc {
  grid-column: 2;
  margin-top: 3px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}
.page-contact .contact-next__link:hover .contact-next__num,
.page-contact .contact-next__link:focus-visible .contact-next__num,
.page-contact .contact-next__link:hover .contact-next__title,
.page-contact .contact-next__link:focus-visible .contact-next__title {
  color: var(--cyan);
}

/* ---------- 焦点 ---------- */
.page-contact a:focus-visible,
.page-contact .contact-channel:focus-within {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-checklist__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
  .page-contact .contact-checklist__item:nth-child(1),
  .page-contact .contact-checklist__item:nth-child(2) {
    border-top: 2px solid var(--ink-700);
  }
}

@media (min-width: 880px) {
  .page-contact .contact-coop__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }
  .page-contact .contact-coop__aside {
    margin-top: 30px;
  }
  .page-contact .contact-window {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-main {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(24px, 3.4vw, 44px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-channel,
  .page-contact .contact-channel__mark,
  .page-contact .contact-next__num,
  .page-contact .contact-next__title {
    transition: none;
  }
  .page-contact .contact-channel:hover,
  .page-contact .contact-channel:focus-within {
    transform: none;
  }
  .page-contact .contact-channel:hover .contact-channel__mark {
    transform: none;
  }
}