.page-contact {
  --ct-hair: var(--tick);
  --ct-card: var(--panel);
  --ct-gap: clamp(20px, 4vw, 40px);
  display: block;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

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

.page-contact h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.16;
  letter-spacing: -.01em;
  font-weight: 900;
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 54px) 0 clamp(32px, 6vw, 68px);
  background:
    radial-gradient(120% 100% at 88% -10%, rgba(123, 77, 255, .20), transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(54%, 470px);
  height: 100%;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(0, 229, 208, .16) 0 1px,
    transparent 1px 40px
  );
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 78%);
  pointer-events: none;
}

.page-contact .contact-hero .container {
  position: relative;
  z-index: 1;
}

.page-contact .contact-eyebrow {
  margin: clamp(16px, 3vw, 28px) 0 12px;
  color: var(--cyan);
}

.page-contact h1 {
  margin: 0 0 18px;
  font-size: clamp(31px, 6vw, 56px);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--paper);
  max-width: 18ch;
}

.page-contact .contact-lede {
  max-width: 44ch;
  margin: 0 0 clamp(20px, 4vw, 32px);
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 渠道 + 问题分类 ---------- */
.page-contact .contact-board {
  padding: clamp(36px, 7vw, 80px) 0;
  background: var(--navy);
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .board-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
}

.page-contact .board-intro {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 42ch;
}

.page-contact .channel-card {
  position: relative;
  background: var(--ct-card);
  border: 1px solid var(--ct-hair);
  border-top: 3px solid var(--orange);
  padding: 20px 18px 22px;
  box-shadow: 10px 10px 0 rgba(0, 0, 0, .42);
}

.page-contact .channel-head {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 10px;
  background: var(--paper);
  color: #14100b;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
}

.page-contact .channel-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 11px 0 0;
}

.page-contact .channel-row:first-of-type {
  padding-top: 0;
}

.page-contact .channel-label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-contact .channel-value {
  font-size: 16px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .channel-note {
  margin: 6px 0 0;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--ct-hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .channel-status {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--ct-hair);
  display: grid;
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .channel-status li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
}

.page-contact .dot {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 6px;
  border-radius: 50%;
}

.page-contact .dot--on {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 208, .14);
}

.page-contact .dot--off {
  background: var(--muted);
  box-shadow: 0 0 0 4px rgba(147, 161, 181, .12);
}

.page-contact .channel-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

/* 问题分类 */
.page-contact .issue-list {
  display: grid;
  gap: 14px;
}

.page-contact .issue-card {
  position: relative;
  padding: 18px 18px 20px;
  background: linear-gradient(180deg, rgba(22, 30, 42, .96), rgba(12, 18, 25, .96));
  border: 1px solid var(--ct-hair);
  border-left: 3px solid var(--violet);
  transition: transform .3s var(--ease), border-left-color .3s var(--ease);
}

.page-contact .issue-card:hover,
.page-contact .issue-card:focus-within {
  transform: translateY(-3px);
  border-left-color: var(--cyan);
}

.page-contact .issue-idx {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .issue-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .issue-desc {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .issue-need {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(243, 231, 211, .82);
}

.page-contact .issue-need li {
  position: relative;
  padding-left: 16px;
}

.page-contact .issue-need li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 合作洽谈 ---------- */
.page-contact .contact-partner {
  padding: clamp(38px, 7vw, 84px) 0;
  background: var(--ink);
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-contact .partner-intro {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 46ch;
}

.page-contact .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .partner-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 16px 18px;
  background: var(--navy);
  border: 1px solid var(--ct-hair);
}

.page-contact .partner-item__mark {
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-contact .partner-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .partner-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .partner-aside {
  padding: 22px 20px 24px;
  background: var(--ct-card);
  border: 1px solid var(--ct-hair);
  border-top: 3px solid var(--cyan);
}

.page-contact .partner-need {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(243, 231, 211, .86);
}

.page-contact .partner-need li {
  position: relative;
  padding-left: 18px;
  border-bottom: 1px dashed var(--ct-hair);
  padding-bottom: 10px;
}

.page-contact .partner-need li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .partner-need li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--orange);
}

.page-contact .partner-foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ct-hair);
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 办公地址 ---------- */
.page-contact .contact-visit {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 7vw, 84px) 0;
  background: var(--navy);
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .visit-bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
}

.page-contact .visit-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.5) contrast(1.1);
}

.page-contact .visit-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--navy) 2%, rgba(12, 18, 25, .74) 46%, var(--navy) 97%);
}

.page-contact .visit-inner {
  position: relative;
  z-index: 1;
}

.page-contact .visit-address {
  margin: 0 0 16px;
  padding-left: 16px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-mono);
  font-style: normal;
  font-size: clamp(15px, 2.2vw, 19px);
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-contact .visit-text {
  margin: 0 0 18px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 231, 211, .82);
}

.page-contact .visit-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 56ch;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .visit-facts li {
  padding: 10px 0 0;
  border-top: 1px dashed var(--ct-hair);
}

.page-contact .visit-facts .mono {
  margin-right: 10px;
  color: var(--cyan);
}

/* ---------- 处理流程 ---------- */
.page-contact .contact-flow {
  padding: clamp(38px, 7vw, 84px) 0;
  background: var(--ink);
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .flow-intro {
  margin: 0 0 clamp(24px, 4vw, 40px);
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .flow-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .flow-step {
  position: relative;
  padding-top: 18px;
  border-top: 1px solid var(--ct-hair);
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .flow-summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

.page-contact .flow-summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-num {
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: .02em;
  color: var(--paper);
  transition: color .25s var(--ease);
}

.page-contact .flow-summary:hover .flow-num,
.page-contact .flow-details[open] .flow-num {
  color: var(--cyan);
}

.page-contact .flow-name {
  font-size: 15px;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .flow-text {
  margin: 10px 0 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 收尾链接 ---------- */
.page-contact .contact-tail {
  padding: clamp(34px, 6vw, 66px) 0 clamp(30px, 5vw, 56px);
  background: var(--ink);
}

.page-contact .tail-title {
  margin: 0 0 18px;
  font-size: 20px;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .tail-links {
  display: grid;
  gap: 10px;
}

.page-contact .tail-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 16px;
  background: var(--navy);
  border: 1px solid var(--ct-hair);
  color: var(--paper);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color .25s var(--ease), color .25s var(--ease), background-color .25s var(--ease);
}

.page-contact .tail-link::after {
  content: "\2192";
  flex: none;
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-contact .tail-link:hover,
.page-contact .tail-link:focus-visible {
  border-color: var(--cyan);
  background: var(--ct-card);
  color: var(--cyan);
}

/* ---------- 中屏 ---------- */
@media (min-width: 620px) {
  .page-contact .issue-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .flow-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--ct-hair);
  }

  .page-contact .flow-step {
    padding: 28px 22px 0 0;
    border-top: 0;
  }

  .page-contact .flow-step::before {
    top: 0;
    width: 2px;
    height: 18px;
  }
}

@media (min-width: 900px) {
  .page-contact .partner-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-contact .board-grid {
    grid-template-columns: minmax(300px, 4.6fr) minmax(0, 7.4fr);
    gap: clamp(36px, 4vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .issue-card,
  .page-contact .tail-link,
  .page-contact .flow-num {
    transition: none;
  }

  .page-contact .issue-card:hover,
  .page-contact .issue-card:focus-within {
    transform: none;
  }
}