.page-contact {
  --rail-w: 92px;
  --flow-c: var(--neon);
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(34px, 7vw, 92px) 0 clamp(24px, 5vw, 56px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -180px;
  left: -18%;
  width: 136%;
  height: 620px;
  background:
    radial-gradient(46% 62% at 18% 44%, rgba(108, 75, 255, 0.34), transparent 72%),
    radial-gradient(40% 54% at 84% 8%, rgba(53, 230, 210, 0.16), transparent 70%);
  pointer-events: none;
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2rem, 6.6vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--ivory);
  background: linear-gradient(102deg, var(--ivory) 28%, var(--haze) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .contact-hero__jump {
  margin: 26px 0 0;
}

/* ---------- 三步引导 ---------- */
.page-contact .path-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-contact .step-rail {
  display: none;
}

.page-contact .rail-node {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding-bottom: 66px;
}

.page-contact .rail-node:last-child {
  padding-bottom: 0;
}

.page-contact .rail-node::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 46px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), rgba(53, 230, 210, 0.5));
}

.page-contact .rail-node:last-child::after {
  display: none;
}

.page-contact .rail-node__num {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--ink);
  background: linear-gradient(140deg, var(--cyan), var(--haze));
}

.page-contact .rail-node__label {
  padding-top: 11px;
  font-size: var(--fs-14);
  line-height: 1.3;
  color: var(--mist);
}

.page-contact .step-list {
  margin-top: 32px;
}

.page-contact .step-detail {
  border-top: 1px solid var(--ember);
}

.page-contact .step-detail:last-of-type {
  border-bottom: 1px solid var(--ember);
}

.page-contact .step-detail > summary {
  display: grid;
  grid-template-columns: auto 1fr 18px;
  gap: 14px;
  align-items: center;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  color: var(--ivory);
  transition: color var(--dur) var(--ease);
}

.page-contact .step-detail > summary::-webkit-details-marker {
  display: none;
}

.page-contact .step-detail > summary::after {
  content: "";
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--haze);
  border-bottom: 2px solid var(--haze);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-contact .step-detail[open] > summary::after {
  transform: rotate(-135deg);
}

.page-contact .step-detail > summary:hover,
.page-contact .step-detail > summary:focus-visible {
  color: var(--cyan);
}

.page-contact .step-detail__num {
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-contact .step-detail__text {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 600;
  line-height: 1.5;
}

.page-contact .step-detail__body {
  padding: 0 0 22px 0;
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.85;
}

.page-contact .step-detail__body p {
  margin: 0;
}

.page-contact .path-media {
  margin: 40px 0 0;
}

/* ---------- 图片容器微调 ---------- */
.page-contact .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .media-frame {
  margin: 0;
}

/* ---------- 客服通道 ---------- */
.page-contact .channels-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
}

.page-contact .channel-card {
  margin-top: 28px;
  padding: 2px 0 2px 22px;
  border-left: 2px solid var(--neon);
}

.page-contact .channel-card--alt {
  border-left-color: var(--cyan);
}

.page-contact .channel-card__label {
  display: block;
  color: var(--gold);
}

.page-contact .channel-card__value {
  display: block;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: clamp(1rem, 2.6vw, 1.4rem);
  line-height: 1.4;
  color: var(--cyan);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color var(--dur) var(--ease);
}

a.channel-card__value:hover,
a.channel-card__value:focus-visible {
  color: var(--ivory);
  text-decoration: underline;
  text-underline-offset: 6px;
}

.page-contact .channel-card__note {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .channels-copy__extra {
  margin: 32px 0 0;
  max-width: 46ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .channels-copy__extra a {
  color: var(--haze);
  text-underline-offset: 4px;
}

.page-contact .channels-copy__extra a:hover,
.page-contact .channels-copy__extra a:focus-visible {
  color: var(--cyan);
}

.page-contact .channels-media {
  margin: 0;
}

/* ---------- 合作面板 ---------- */
.page-contact .coop-tabs {
  margin: 30px 0 26px;
  flex-wrap: wrap;
  width: fit-content;
  max-width: 100%;
}

.page-contact .coop-panel {
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3.4vw, 42px);
}

.page-contact .coop-panel[hidden] {
  display: none;
}

.page-contact .coop-panel h3 {
  margin: 0 0 14px;
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  font-weight: 700;
  color: var(--ivory);
}

.page-contact .coop-panel p {
  margin: 0 0 18px;
  max-width: 66ch;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .coop-panel ul {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .coop-panel li {
  position: relative;
  padding-left: 22px;
  max-width: 64ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .coop-panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--gold);
}

.page-contact .coop-panel li a {
  color: var(--haze);
  text-underline-offset: 4px;
}

.page-contact .coop-panel li a:hover,
.page-contact .coop-panel li a:focus-visible {
  color: var(--cyan);
}

/* ---------- 处理流程 ---------- */
.page-contact .flow {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
}

.page-contact .flow__step {
  position: relative;
  padding: 22px 0 26px 22px;
  border-left: 2px solid var(--flow-c);
}

.page-contact .flow__step:nth-child(1) { --flow-c: var(--neon); }
.page-contact .flow__step:nth-child(2) { --flow-c: #8E6BFF; }
.page-contact .flow__step:nth-child(3) { --flow-c: var(--haze); }
.page-contact .flow__step:nth-child(4) { --flow-c: var(--cyan); }

.page-contact .flow__num {
  display: block;
  margin-bottom: 10px;
  color: var(--flow-c);
}

.page-contact .flow__title {
  margin: 0 0 8px;
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 600;
  color: var(--ivory);
}

.page-contact .flow__body {
  margin: 0;
  max-width: 34ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 通信与备案 ---------- */
.page-contact .info-list {
  margin: 32px 0 0;
  display: grid;
  gap: 0;
}

.page-contact .info-list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ember);
}

.page-contact .info-list dt {
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--haze);
}

.page-contact .info-list dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.page-contact .info-list dd a {
  color: var(--cyan);
  text-underline-offset: 4px;
}

.page-contact .info-list dd a:hover,
.page-contact .info-list dd a:focus-visible {
  color: var(--ivory);
}

/* ---------- 底部联系信息带 ---------- */
.page-contact .contact-strip {
  margin-top: 12px;
  padding: 36px 0;
  background: linear-gradient(100deg, rgba(108, 75, 255, 0.18), rgba(53, 230, 210, 0.10) 58%, rgba(5, 6, 14, 0) 100%);
  border-top: 1px solid rgba(108, 75, 255, 0.32);
  border-bottom: 1px solid rgba(53, 230, 210, 0.22);
}

.page-contact .contact-strip__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-contact .contact-strip__item {
  display: grid;
  gap: 8px;
  text-decoration: none;
}

.page-contact .contact-strip__item .mono-xs {
  color: var(--gold);
}

.page-contact .contact-strip__item strong {
  font-size: var(--fs-14);
  font-weight: 500;
  line-height: 1.65;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.page-contact a.contact-strip__item strong {
  color: var(--cyan);
  transition: color var(--dur) var(--ease);
}

.page-contact a.contact-strip__item:hover strong,
.page-contact a.contact-strip__item:focus-visible strong {
  color: var(--ivory);
  text-decoration: underline;
  text-underline-offset: 5px;
}

/* ---------- 相关页面 ---------- */
.page-contact .more-links {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-contact .more-links li {
  border-top: 1px solid var(--ember);
}

.page-contact .more-links li:last-child {
  border-bottom: 1px solid var(--ember);
}

.page-contact .more-links a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 20px 0;
  text-decoration: none;
  color: var(--ivory);
  transition: color var(--dur) var(--ease);
}

.page-contact .more-links a strong {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  font-weight: 600;
}

.page-contact .more-links a span {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--mist);
}

.page-contact .more-links a:hover,
.page-contact .more-links a:focus-visible {
  color: var(--cyan);
}

.page-contact .more-links a:hover span,
.page-contact .more-links a:focus-visible span {
  color: var(--haze);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .info-list > div {
    grid-template-columns: 150px 1fr;
    gap: 26px;
    align-items: baseline;
  }

  .page-contact .contact-strip__inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 36px;
  }

  .page-contact .more-links {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 44px;
  }

  .page-contact .more-links li:nth-last-child(2) {
    border-bottom: 1px solid var(--ember);
  }
}

@media (min-width: 820px) {
  .page-contact .path-grid {
    grid-template-columns: var(--rail-w) 1fr;
    gap: 52px;
    align-items: start;
  }

  .page-contact .step-rail {
    display: flex;
    flex-direction: column;
    padding-top: 6px;
  }

  .page-contact .step-detail > summary {
    grid-template-columns: 96px 1fr 18px;
    gap: 20px;
    padding: 22px 0;
  }

  .page-contact .step-detail__body {
    padding: 0 0 24px 116px;
  }

  .page-contact .flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }

  .page-contact .flow__step {
    border-left: 0;
    border-top: 3px solid var(--flow-c);
    padding: 26px 26px 4px 0;
  }

  .page-contact .flow__body {
    max-width: 30ch;
  }
}

@media (min-width: 880px) {
  .page-contact .channels-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
  }

  .page-contact .contact-strip__inner {
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .step-detail > summary::after,
  .page-contact .channel-card__value,
  .page-contact .more-links a,
  .page-contact .contact-strip__item strong {
    transition: none;
  }
}