.page-contact {
  --contact-cut: 18px;
  position: relative;
  overflow-x: hidden;
  padding-bottom: clamp(56px, 9vw, 120px);
  color: var(--paper);
  background:
    radial-gradient(1100px 520px at 88% -6%, rgba(108, 92, 231, .18), transparent 60%),
    radial-gradient(760px 420px at -8% 8%, rgba(199, 249, 74, .07), transparent 58%),
    var(--ink-green-900);
}

/* ---------- hero ---------- */
.page-contact .contactHero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--grid-line);
}

.page-contact .contactHero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-contact .contactHero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .46;
}

.page-contact .contactHero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(102deg, rgba(7, 19, 15, .97) 0%, rgba(7, 19, 15, .84) 44%, rgba(7, 19, 15, .32) 100%),
    radial-gradient(700px 340px at 78% 16%, rgba(240, 166, 60, .16), transparent 62%);
}

.page-contact .contactHero__inner {
  padding-block: clamp(48px, 10vw, 120px) clamp(44px, 7vw, 88px);
}

.page-contact .contactHero__eyebrow {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-contact .contactHero__title {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 15ch;
  font-size: clamp(36px, 8.6vw, 92px);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-contact .contactHero__title em {
  display: block;
  font-style: normal;
  font-weight: 600;
  color: var(--lime-400);
}

.page-contact .contactHero__lead {
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 通用区块头 ---------- */
.page-contact .contactChannels,
.page-contact .contactSplit,
.page-contact .contactFeedback,
.page-contact .contactCoop {
  padding-top: clamp(56px, 9vw, 110px);
}

.page-contact .blockHead {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 48px);
  max-width: 72ch;
}

.page-contact .blockHead h2 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .blockHead p:not(.eyebrow) {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 渠道卡片 ---------- */
.page-contact .channelStack {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-contact .channelCard {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3vw, 34px);
  background: var(--charcoal-800);
  border: 1px solid var(--grid-line);
  border-left: 3px solid var(--lime-400);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut)) 0, 100% var(--contact-cut), 100% 100%, 0 100%);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-contact .channelCard--amber {
  border-left-color: var(--amber-500);
}

.page-contact .channelCard--mist {
  border-left-color: var(--mist);
}

.page-contact .channelCard:hover,
.page-contact .channelCard:focus-within {
  transform: translateY(-3px);
  background: #171b1d;
  border-color: rgba(199, 249, 74, .45);
}

.page-contact .channelCard--amber:hover,
.page-contact .channelCard--amber:focus-within {
  border-color: rgba(240, 166, 60, .5);
}

.page-contact .channelCard--mist:hover,
.page-contact .channelCard--mist:focus-within {
  border-color: rgba(155, 167, 158, .55);
}

.page-contact .channelCard__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-contact .channelCard__name {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 500;
  color: var(--paper);
}

.page-contact .channelCard__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 21px);
  letter-spacing: .01em;
  line-height: 1.5;
  color: var(--lime-400);
  word-break: break-word;
}

.page-contact .channelCard--amber .channelCard__value {
  color: var(--amber-500);
}

.page-contact .channelCard--mist .channelCard__value {
  font-family: var(--font-body);
  font-size: clamp(14.5px, 1.6vw, 16.5px);
  line-height: 1.65;
  color: var(--paper);
}

.page-contact .channelCard__desc {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .channelCard__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 900px) {
  .page-contact .channelStack {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .channelCard:nth-child(1) {
    grid-column: 1 / span 7;
  }

  .page-contact .channelCard:nth-child(2) {
    grid-column: 4 / span 7;
  }

  .page-contact .channelCard:nth-child(3) {
    grid-column: 7 / span 6;
  }
}

/* ---------- 响应时段 + 反馈说明 ---------- */
.page-contact .contactSplit__inner {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

@media (min-width: 960px) {
  .page-contact .contactSplit__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

.page-contact .contactSplit__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .contactSplit__text {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .timeBelt {
  margin-top: clamp(24px, 3vw, 36px);
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--grid-line);
  background: rgba(20, 23, 26, .62);
}

.page-contact .timeBelt__scale {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-contact .timeBelt__bar {
  position: relative;
  height: 10px;
  margin-top: 14px;
  border-block: 1px solid var(--grid-line);
  background: repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 8.333%);
}

.page-contact .timeBelt__open {
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: 37.5%;
  width: 37.5%;
  background: linear-gradient(90deg, rgba(199, 249, 74, .28), rgba(199, 249, 74, .74));
  border-inline: 1px solid var(--lime-400);
  box-shadow: 0 0 26px -6px rgba(199, 249, 74, .62);
}

.page-contact .timeBelt__caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .timeBelt__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: var(--lime-400);
  box-shadow: 0 0 10px rgba(199, 249, 74, .8);
}

.page-contact .contactSplit__right {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-contact .contactShot {
  margin: 0;
}

.page-contact .contactSplit__note {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--grid-line);
  border-top: 2px solid var(--ice-blue);
  background: rgba(20, 23, 26, .72);
}

.page-contact .contactSplit__note ul {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contactSplit__note li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .contactSplit__note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .64em;
  width: 8px;
  height: 1px;
  background: var(--ice-blue);
}

/* ---------- 反馈要素清单 ---------- */
.page-contact .feedbackList {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .feedbackItem {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-top: 1px solid var(--grid-line);
}

.page-contact .feedbackItem__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--lime-400);
}

.page-contact .feedbackItem h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--paper);
}

.page-contact .feedbackItem p {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

@media (min-width: 860px) {
  .page-contact .feedbackList {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 5vw, 72px);
  }
}

/* ---------- 合作联络 ---------- */
.page-contact .coopGrid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

@media (min-width: 860px) {
  .page-contact .coopGrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .coopCard {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--grid-line);
  background: linear-gradient(158deg, rgba(108, 92, 231, .16), rgba(20, 23, 26, .92) 48%);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-contact .coopCard:hover,
.page-contact .coopCard:focus-within {
  transform: translateY(-3px);
  border-color: rgba(127, 211, 255, .42);
}

.page-contact .coopCard h3 {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 500;
  color: var(--paper);
}

.page-contact .coopCard p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mist);
}

.page-contact .coopCard__link {
  justify-self: start;
  padding-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 249, 74, .45);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .coopCard__link:hover,
.page-contact .coopCard__link:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

.page-contact .coopPrep {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--grid-line);
  border-left: 3px solid var(--amber-500);
  background: rgba(20, 23, 26, .6);
}

.page-contact .prepList {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .prepList li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .prepList li::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  color: var(--amber-500);
}

.page-contact .coopPrep__hint {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 山形分隔 + 备案 ---------- */
.page-contact .mountainDivider {
  display: block;
  width: 100%;
  height: clamp(28px, 5vw, 54px);
  margin-top: clamp(48px, 8vw, 88px);
  color: var(--grid-line);
  opacity: .9;
}

.page-contact .contactLegal {
  padding-top: clamp(28px, 4vw, 48px);
}

.page-contact .legalStrip {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  padding: clamp(24px, 3.4vw, 40px);
  border: 1px solid var(--grid-line);
  background: rgba(20, 23, 26, .6);
}

@media (min-width: 880px) {
  .page-contact .legalStrip {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }
}

.page-contact .legalStrip h2 {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 400;
  line-height: 1.24;
  color: var(--paper);
}

.page-contact .legalStrip p {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mist);
}

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

.page-contact .legalStrip__facts > div {
  display: grid;
  grid-template-columns: minmax(84px, auto) minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--grid-line);
}

.page-contact .legalStrip__facts dt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-contact .legalStrip__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .legalStrip__more {
  max-width: 74ch;
  margin: clamp(22px, 3vw, 32px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .legalStrip__more a {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 249, 74, .4);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .legalStrip__more a:hover,
.page-contact .legalStrip__more a:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channelCard,
  .page-contact .coopCard,
  .page-contact .coopCard__link,
  .page-contact .legalStrip__more a {
    transition: none;
  }

  .page-contact .channelCard:hover,
  .page-contact .channelCard:focus-within,
  .page-contact .coopCard:hover,
  .page-contact .coopCard:focus-within {
    transform: none;
  }
}