/* ===== 联系与反馈页 · page-contact ===== */
.page-contact {
  --pc-pad: clamp(52px, 7vw, 96px);
  --pc-gap: clamp(18px, 2.2vw, 28px);
  display: block;
  color: var(--mist);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 520px at 8% -6%, rgba(43, 240, 181, .11), transparent 62%),
    radial-gradient(820px 460px at 98% 3%, rgba(255, 138, 61, .06), transparent 58%);
  background-repeat: no-repeat;
}

.page-contact .container {
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .breadcrumb-item a {
  color: var(--mist);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-contact .breadcrumb-item a:hover {
  color: var(--mint);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(76px, 9vw, 118px) 0 clamp(44px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--mint-press) 0 1px, transparent 1px 18px);
  opacity: .35;
  pointer-events: none;
}

.page-contact .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 52px);
  align-items: center;
}

.page-contact .hero-copy h1 {
  margin: 16px 0 0;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.16;
  letter-spacing: .005em;
  color: var(--silver);
}

.page-contact .hero-copy h1 .hl {
  color: var(--mint);
}

.page-contact .hero-copy .lede {
  max-width: 46ch;
  margin: 20px 0 0;
}

.page-contact .hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px dashed var(--line);
}

.page-contact .hero-meta li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-contact .hero-meta .stat-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4vw, 44px);
  line-height: .9;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-contact .hero-meta .unit {
  font-size: 15px;
  font-weight: 600;
  color: var(--silver);
}

.page-contact .hero-meta .label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  opacity: .82;
}

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

.page-contact .hero-media .media-frame {
  box-shadow: 0 0 0 1px rgba(43, 240, 181, .18), 0 40px 80px -52px rgba(0, 0, 0, .95);
}

/* ---------- 渠道 + 流程 ---------- */
.page-contact .desk {
  position: relative;
  padding: var(--pc-pad) 0;
  background: var(--indigo-deep);
  overflow: hidden;
}

.page-contact .desk::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 53, 80, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 53, 80, .42) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: .38;
  pointer-events: none;
}

.page-contact .desk .container {
  z-index: 1;
}

.page-contact .desk-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(38px, 5vw, 64px);
}

.page-contact .section-head .lede {
  margin: 14px 0 0;
}

.page-contact .channel-stack {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--indigo);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--mint), transparent);
  opacity: .4;
  transition: opacity .22s var(--ease);
}

.page-contact .channel-card:hover {
  transform: translateY(-2px);
  border-color: var(--mint-press);
  box-shadow: 0 22px 44px -34px rgba(43, 240, 181, .65);
}

.page-contact .channel-card:hover::after {
  opacity: 1;
}

.page-contact .channel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-contact .channel-title {
  margin: 0;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(19px, 2vw, 23px);
  color: var(--silver);
}

.page-contact .channel-desc {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .channel-value {
  margin: 14px 0 0;
  padding: 12px 14px;
  background: rgba(5, 7, 13, .55);
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  color: var(--mint);
  font-size: clamp(14px, 1.5vw, 16.5px);
  line-height: 1.55;
  overflow-wrap: anywhere;
  user-select: text;
}

.page-contact .channel-meta {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--amber);
  opacity: .92;
}

/* 流程步骤 */
.page-contact .flow-list {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
}

.page-contact .flow-step {
  position: relative;
  padding: 0 0 28px 54px;
  outline: none;
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 42px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--mint-press), rgba(18, 169, 124, 0) 92%);
  opacity: .55;
}

.page-contact .flow-step:last-child {
  padding-bottom: 0;
}

.page-contact .flow-step:last-child::before {
  display: none;
}

.page-contact .flow-index {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--indigo);
  border: 1px solid var(--mint-press);
  color: var(--mint);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .04em;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-contact .flow-step:hover .flow-index,
.page-contact .flow-step:focus-within .flow-index {
  background: var(--mint);
  border-color: var(--mint);
  color: var(--ink);
}

.page-contact .flow-title {
  margin: 6px 0 0;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(17px, 1.8vw, 20px);
  color: var(--silver);
}

.page-contact .flow-desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .flow-note {
  max-height: 0;
  margin: 0;
  padding-left: 0;
  overflow: hidden;
  opacity: 0;
  border-left: 2px solid transparent;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  transition:
    max-height .28s var(--ease),
    opacity .22s var(--ease),
    margin-top .28s var(--ease),
    padding-left .28s var(--ease),
    border-color .28s var(--ease);
}

.page-contact .flow-step:hover .flow-note,
.page-contact .flow-step:focus-within .flow-note {
  max-height: 220px;
  margin-top: 12px;
  padding-left: 12px;
  opacity: 1;
  border-left-color: var(--mint-press);
}

.page-contact .respond-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-top: clamp(24px, 3vw, 34px);
  padding: 16px 20px;
  background: rgba(23, 36, 74, .55);
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
}

.page-contact .respond-k {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-contact .respond-bar p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .flow-media {
  margin: clamp(28px, 3.6vw, 42px) 0 0;
}

/* ---------- 反馈信息 ---------- */
.page-contact .details {
  padding: var(--pc-pad) 0;
  background: var(--ink);
}

.page-contact .detail-list {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-contact .detail-item {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink);
  transition: background .22s var(--ease);
}

.page-contact .detail-item:hover {
  background: var(--indigo-deep);
}

.page-contact .detail-index {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mint);
  opacity: .85;
}

.page-contact .detail-item h3 {
  margin: 10px 0 0;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(17px, 1.8vw, 20px);
  color: var(--silver);
}

.page-contact .detail-item p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 常见问题入口 ---------- */
.page-contact .quick-answers {
  padding: var(--pc-pad) 0;
  background: var(--indigo-deep);
}

.page-contact .faq-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(26px, 3.4vw, 38px);
}

.page-contact .faq-link {
  display: block;
  padding: clamp(20px, 2.4vw, 26px);
  background: var(--indigo);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}

.page-contact .faq-link:hover,
.page-contact .faq-link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--mint);
  background: #1B2A55;
  outline: none;
}

.page-contact .faq-tag {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-contact .faq-link h3 {
  margin: 12px 0 0;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.42;
  color: var(--silver);
}

.page-contact .faq-link p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .faq-go {
  display: inline-block;
  margin-top: 16px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--mint);
}

.page-contact .faq-more {
  margin: clamp(24px, 3vw, 34px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .faq-more a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 181, .35);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .faq-more a:hover {
  color: var(--silver);
  border-bottom-color: var(--silver);
}

/* ---------- 备案与归属 ---------- */
.page-contact .reg-strip {
  padding: clamp(42px, 6vw, 76px) 0 clamp(48px, 6vw, 82px);
  background: var(--ink);
  border-top: 1px solid var(--line);
}

.page-contact .reg-scale {
  height: 8px;
  margin-bottom: clamp(22px, 3vw, 32px);
  background: repeating-linear-gradient(90deg, var(--mint-press) 0 1px, transparent 1px 18px);
  opacity: .45;
}

.page-contact .reg-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 44px;
}

.page-contact .reg-item {
  position: relative;
  flex: 1 1 220px;
  min-width: 0;
  padding: 2px 0;
}

.page-contact .reg-k {
  display: block;
  font-size: clamp(14px, 1.6vw, 17px);
  letter-spacing: .02em;
  color: var(--silver);
  overflow-wrap: anywhere;
}

.page-contact .reg-v {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mint);
}

.page-contact .reg-tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  width: max-content;
  max-width: 240px;
  padding: 8px 12px;
  background: var(--indigo);
  border: 1px solid var(--mint-press);
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  pointer-events: none;
  z-index: 3;
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s var(--ease);
}

.page-contact .reg-item:hover .reg-tip,
.page-contact .reg-item:focus-within .reg-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-contact .reg-item:focus-visible {
  outline: 1px solid var(--mint-press);
  outline-offset: 4px;
  border-radius: var(--radius-md);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .detail-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .faq-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

@media (min-width: 1000px) {
  .page-contact .desk-grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.08fr);
  }
}

@media (max-width: 719px) {
  .page-contact .reg-tip {
    position: static;
    width: auto;
    max-width: none;
    margin-top: 10px;
    padding: 0;
    background: transparent;
    border: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    font-size: 12.5px;
    color: var(--mist);
    opacity: .8;
  }

  .page-contact .flow-step {
    padding-left: 48px;
  }

  .page-contact .flow-step::before {
    left: 15px;
  }

  .page-contact .flow-index {
    width: 32px;
    height: 32px;
    font-size: 11.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .flow-note {
    transition: none;
  }

  .page-contact .channel-card,
  .page-contact .faq-link,
  .page-contact .detail-item,
  .page-contact .flow-index,
  .page-contact .reg-tip {
    transition: none;
  }
}