/* ============================================================
   联系与反馈页 —— 页面作用域 .page-contact
   ============================================================ */

.page-contact {
  --contact-dim: #C3CDE8;
  --contact-slate: #46527A;
  display: block;
  background: var(--ink);
  color: var(--star);
}

.page-contact .section {
  padding-block: clamp(56px, 7vw, 100px);
}

/* ---------- 首屏：坐标落点 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--bd) solid var(--line);
  background:
    radial-gradient(120% 90% at 84% 8%, rgba(123, 92, 255, 0.30), transparent 62%),
    radial-gradient(90% 74% at 4% 96%, rgba(67, 224, 200, 0.14), transparent 66%),
    var(--ink);
}

.page-contact .contact-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(42, 58, 107, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 58, 107, 0.55) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.28) 78%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.28) 78%, transparent 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  padding-block: clamp(48px, 7vw, 92px);
}

.page-contact .contact-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(34px, 6.2vw, 74px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--star);
}

.page-contact .contact-hero h1 em {
  font-style: normal;
  color: var(--gold);
}

.page-contact .contact-hero__lead {
  max-width: 46ch;
  margin: 22px 0 0;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--star);
  opacity: 0.86;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-contact .contact-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 46px);
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding-top: 22px;
  border-top: var(--bd) solid var(--line);
}

.page-contact .contact-hero__stats dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-contact .contact-hero__stats dd {
  margin: 8px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 900;
  color: var(--star);
}

.page-contact .contact-hero__stats .num {
  color: var(--gold);
}

.page-contact .contact-hero__viz {
  position: relative;
  margin: 0;
  border: var(--bd) solid var(--line);
  background: var(--ink-2);
  box-shadow: 10px 10px 0 rgba(42, 58, 107, 0.55);
}

.page-contact .contact-hero__viz img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-contact .contact-hero__viz figcaption {
  padding: 12px 16px;
  border-top: var(--bd) solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--muted);
}

/* ---------- 面包屑 ---------- */

.page-contact .breadcrumb {
  padding-block: 16px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

/* ---------- 通用区块标题 ---------- */

.page-contact .contact-head {
  max-width: 64ch;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.page-contact .contact-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(27px, 4vw, 46px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--star);
}

.page-contact .contact-head__lede {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 三条通道 ---------- */

.page-contact .channels {
  background: var(--ink);
}

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

.page-contact .channel-card {
  position: relative;
  padding: clamp(22px, 3vw, 30px);
  border: var(--bd) solid var(--line);
  background: var(--ink-2);
  box-shadow: 8px 8px 0 rgba(42, 58, 107, 0.6);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: 12px 12px 0 rgba(42, 58, 107, 0.75);
  border-color: var(--gold);
}

.page-contact .channel-card__coord {
  display: inline-block;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--gold);
}

.page-contact .channel-card--b .channel-card__coord {
  color: var(--star);
  background: var(--violet);
}

.page-contact .channel-card--c .channel-card__coord {
  color: var(--ink);
  background: var(--cyan);
}

.page-contact .channel-card__title {
  margin: 18px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 900;
  color: var(--star);
}

.page-contact .channel-card__value {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  word-break: break-all;
  color: var(--gold);
}

.page-contact .channel-card__desc {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--contact-dim);
}

.page-contact .channel-card__fit {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.3s ease;
}

.page-contact .channel-card__fit > div {
  overflow: hidden;
}

.page-contact .channel-card__fit-title {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .channel-card__fit ul {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel-card__fit li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--star);
}

.page-contact .channel-card__fit li + li {
  margin-top: 6px;
}

.page-contact .channel-card__fit li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 2px;
  background: var(--gold);
}

.page-contact .channel-card--b .channel-card__fit li::before {
  background: var(--violet);
}

.page-contact .channel-card--c .channel-card__fit li::before {
  background: var(--cyan);
}

@media (hover: hover) and (pointer: fine) {
  .page-contact .channel-card__fit {
    grid-template-rows: 0fr;
  }
  .page-contact .channel-card:hover .channel-card__fit,
  .page-contact .channel-card:focus-within .channel-card__fit {
    grid-template-rows: 1fr;
  }
}

/* ---------- 邮箱与电话使用说明 ---------- */

.page-contact .usage {
  background: var(--ink-2);
  border-top: var(--bd) solid var(--line);
  border-bottom: var(--bd) solid var(--line);
}

.page-contact .usage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .usage-panel {
  padding: clamp(22px, 3vw, 32px);
  border: var(--bd) solid var(--line);
  background: var(--ink);
  box-shadow: 8px 8px 0 rgba(10, 19, 48, 0.7);
}

.page-contact .usage-panel--gold {
  border-color: var(--gold);
  box-shadow: 8px 8px 0 rgba(245, 194, 75, 0.18);
}

.page-contact .usage-panel__tag {
  display: inline-block;
  margin: 0;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--star);
  background: var(--line);
}

.page-contact .usage-panel--gold .usage-panel__tag {
  color: var(--ink);
  background: var(--gold);
}

.page-contact .usage-panel h3 {
  margin: 16px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(21px, 2.2vw, 26px);
  font-weight: 900;
  color: var(--star);
}

.page-contact .usage-list {
  margin: 22px 0 0;
  padding: 0;
}

.page-contact .usage-list > div {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-contact .usage-list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .usage-list dd {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--star);
}

.page-contact .usage-panel--gold .usage-list dd:first-of-type {
  font-family: var(--font-mono);
  color: var(--gold);
}

/* ---------- 反馈表单填写指引 ---------- */

.page-contact .formzone {
  background: var(--paper);
  color: var(--ink);
}

.page-contact .formzone .eyebrow {
  color: var(--violet-deep);
}

.page-contact .formzone .contact-head h2 {
  color: var(--ink);
}

.page-contact .formzone .contact-head__lede {
  color: var(--contact-slate);
}

.page-contact .feedback-form {
  padding: clamp(22px, 3vw, 36px);
  border: var(--bd) solid var(--ink);
  background: #ffffff;
  box-shadow: 10px 10px 0 rgba(10, 19, 48, 0.14);
}

.page-contact .feedback-form__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .feedback-form__field label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.page-contact .feedback-form__field input,
.page-contact .feedback-form__field select,
.page-contact .feedback-form__field textarea {
  box-sizing: border-box;
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  border: var(--bd) solid var(--ink);
  border-radius: 0;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-contact .feedback-form__field textarea {
  min-height: 132px;
  resize: vertical;
}

.page-contact .feedback-form__field input:focus,
.page-contact .feedback-form__field select:focus,
.page-contact .feedback-form__field textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 4px 4px 0 rgba(245, 194, 75, 0.55);
}

.page-contact .feedback-form__field ::placeholder {
  color: var(--muted);
  opacity: 1;
}

.page-contact .feedback-form__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: var(--bd) solid rgba(10, 19, 48, 0.16);
}

.page-contact .feedback-form__hint {
  flex: 1 1 260px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--contact-slate);
}

/* ---------- 处理流程 ---------- */

.page-contact .flow {
  background: var(--ink);
}

.page-contact .flow__viz {
  margin: 0 0 clamp(30px, 4vw, 48px);
  border: var(--bd) solid var(--line);
  background: var(--ink-2);
}

.page-contact .flow__viz img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-contact .flow-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow-step {
  position: relative;
  padding-top: 34px;
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 13px;
  height: var(--bd);
  background: var(--line);
}

.page-contact .flow-step::after {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 12px;
  height: 12px;
  background: var(--gold);
}

.page-contact .flow-step details {
  border: var(--bd) solid var(--line);
  background: var(--ink-2);
}

.page-contact .flow-step summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .flow-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
}

.page-contact .flow-step details[open] summary::after {
  content: "–";
}

.page-contact .flow-step details[open] summary {
  border-bottom: 1px solid var(--line);
}

.page-contact .flow-step__coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-contact .flow-step__name {
  font-family: var(--font-narrow);
  font-size: 20px;
  font-weight: 900;
  color: var(--star);
}

.page-contact .flow-step details > p {
  margin: 0;
  padding: 16px 18px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--contact-dim);
}

/* ---------- 通信地址与备案 ---------- */

.page-contact .registry {
  background: var(--ink-2);
  border-top: var(--bd) solid var(--line);
}

.page-contact .registry__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-contact .registry__copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 900;
  line-height: 1.12;
  color: var(--star);
}

.page-contact .registry__copy p:last-child {
  max-width: 52ch;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--contact-dim);
}

.page-contact .plaque {
  padding: clamp(22px, 3vw, 30px);
  border: var(--bd) solid var(--gold);
  background: var(--ink);
  box-shadow: 10px 10px 0 rgba(245, 194, 75, 0.16);
}

.page-contact .plaque__row + .plaque__row {
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px dashed var(--line);
}

.page-contact .plaque__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .plaque__val {
  margin: 9px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--star);
}

.page-contact .plaque__val--mono {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  word-break: break-all;
  color: var(--cyan);
}

.page-contact .plaque__note {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 常见反馈类型与建议写法 ---------- */

.page-contact .types {
  background: var(--ink);
}

.page-contact .type-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .type-card {
  padding: clamp(20px, 2.6vw, 28px);
  border: var(--bd) solid var(--line);
  background: var(--ink-2);
  box-shadow: 6px 6px 0 rgba(42, 58, 107, 0.55);
}

.page-contact .type-card__tag {
  display: inline-block;
  margin: 0;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--cyan);
}

.page-contact .type-card h3 {
  margin: 14px 0 0;
  font-family: var(--font-narrow);
  font-size: 20px;
  font-weight: 900;
  color: var(--star);
}

.page-contact .type-card__pair {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.page-contact .type-card__line {
  margin: 0;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--contact-dim);
  background: rgba(10, 19, 48, 0.55);
  border-left: 4px solid var(--line);
}

.page-contact .type-card__line--better {
  color: var(--star);
  border-left-color: var(--gold);
  background: rgba(245, 194, 75, 0.08);
}

.page-contact .type-card__line b {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-contact .type-card__line--better b {
  color: var(--gold);
}

/* ---------- 其他入口 ---------- */

.page-contact .nextstop {
  background: var(--ink);
  border-top: var(--bd) solid var(--line);
}

.page-contact .nextstop__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .nextstop__list li {
  border-bottom: 1px solid var(--line);
}

.page-contact .nextstop__list a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  padding: 18px 6px;
  text-decoration: none;
  color: var(--star);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.page-contact .nextstop__list a:hover,
.page-contact .nextstop__list a:focus-visible {
  color: var(--gold);
  background: rgba(245, 194, 75, 0.07);
}

.page-contact .nextstop__name {
  font-family: var(--font-narrow);
  font-size: 19px;
  font-weight: 900;
}

.page-contact .nextstop__desc {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .feedback-form__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-contact .feedback-form__field--wide {
    grid-column: 1 / -1;
  }
  .page-contact .type-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-contact .usage__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }
  .page-contact .channel-rack {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }
  .page-contact .channel-card--b {
    margin-top: 46px;
  }
  .page-contact .channel-card--c {
    margin-top: 92px;
  }
  .page-contact .flow-track {
    grid-template-columns: repeat(4, 1fr);
    gap: 0 22px;
  }
  .page-contact .registry__inner {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-contact .contact-hero__viz {
    box-shadow: 14px 14px 0 rgba(42, 58, 107, 0.55);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .channel-card__fit,
  .page-contact .feedback-form__field input,
  .page-contact .feedback-form__field select,
  .page-contact .feedback-form__field textarea,
  .page-contact .nextstop__list a {
    transition: none;
  }
  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within {
    transform: none;
  }
}
</main>