/* =========================================================
   合作与反馈 / page-contact
   ========================================================= */

.page-contact {
  --pc-gap: clamp(22px, 4vw, 36px);
  overflow-x: clip;
}

.page-contact [data-section] {
  scroll-margin-top: 96px;
}

/* ---------------- 首屏 ---------------- */

.page-contact .contact-hero {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  align-items: start;
  padding-top: clamp(10px, 2.4vw, 22px);
}

.page-contact .contact-hero__text {
  max-width: 40rem;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--c-title);
}

.page-contact .contact-hero__lede {
  margin: 0;
  max-width: 34rem;
  font-size: clamp(15px, 1.65vw, 17.5px);
  line-height: 1.78;
  color: var(--c-body);
}

.page-contact .contact-hero__chips {
  margin-top: 24px;
}

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

.page-contact .contact-hero__figure .figure__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--c-panel), var(--c-night));
  box-shadow: var(--shadow-panel);
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .contact-hero__figure .figure__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: clamp(40px, 5vw, 68px);
  }
}

/* ---------------- 合作方向卡片 ---------------- */

.page-contact .channel-grid {
  display: grid;
  gap: var(--pc-gap);
}

@media (min-width: 820px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 3.4vw, 36px);
  overflow: hidden;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-signal), rgba(255, 122, 26, 0) 64%);
  opacity: .9;
}

.page-contact .channel-card__tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-signal-soft);
  border: 1px solid var(--c-line-strong);
  border-radius: var(--r-pill);
  padding: 4px 12px;
  background: rgba(255, 122, 26, .09);
}

.page-contact .channel-card__title {
  margin: 18px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--c-title);
}

.page-contact .channel-card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-body);
}

.page-contact .channel-card__meta {
  margin: 22px 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--c-line);
  display: grid;
  gap: 13px;
}

.page-contact .channel-card__meta > div {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-contact .channel-card__meta dt {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--c-mist);
}

.page-contact .channel-card__meta dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-body);
}

@media (max-width: 430px) {
  .page-contact .channel-card__meta > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

/* ---------------- 联络工作台 ---------------- */

.page-contact .workbench {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .workbench__col {
  display: grid;
  gap: var(--pc-gap);
  align-content: start;
}

@media (min-width: 980px) {
  .page-contact .workbench {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: clamp(26px, 3.6vw, 44px);
    align-items: start;
  }
}

.page-contact .shift-card,
.page-contact .respond-card {
  padding: clamp(22px, 3vw, 30px);
}

.page-contact .shift-clock {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6.6vw, 44px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--c-paper);
}

.page-contact .shift-note {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--c-body);
}

.page-contact .shift-track {
  list-style: none;
  margin: 22px 0 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--c-line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.page-contact .shift-track li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--c-mist);
}

.page-contact .shift-track__t {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-signal-soft);
}

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

.page-contact .respond-item {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-contact .respond-item .dot {
  margin-top: 6px;
}

.page-contact .respond-item__title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--c-title);
}

.page-contact .respond-item__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-body);
}

/* ---------------- 提交指引（可折叠） ---------------- */

.page-contact .guide {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-contact .guide__intro {
  margin: 0 0 2px;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--c-mist);
}

.page-contact .guide-item {
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-surface);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-contact .guide-item[open],
.page-contact .guide-item:hover {
  border-color: var(--c-signal);
}

.page-contact .guide-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--c-title);
}

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

.page-contact .guide-item summary:focus-visible {
  outline: 2px solid var(--c-signal);
  outline-offset: 2px;
  border-radius: var(--r-md);
}

.page-contact .guide-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-signal);
  border: 1px solid var(--c-line-strong);
  border-radius: var(--r-xs);
  padding: 2px 8px;
}

.page-contact .guide-item summary::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-left: auto;
  flex: none;
  border-right: 2px solid var(--c-slate);
  border-bottom: 2px solid var(--c-slate);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .guide-item[open] summary::after {
  transform: rotate(-135deg) translate(-2px, -2px);
  border-color: var(--c-signal);
}

.page-contact .guide-item__body {
  padding: 0 18px 18px 62px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-body);
}

@media (max-width: 520px) {
  .page-contact .guide-item__body {
    padding-left: 18px;
  }
}

/* ---------------- 四步流程 ---------------- */

.page-contact .flow-split {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

@media (min-width: 900px) {
  .page-contact .flow-split {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }
}

.page-contact .flow {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-contact .flow__item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 26px;
}

.page-contact .flow__item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 42px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-line-strong), rgba(74, 109, 140, 0));
}

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

.page-contact .flow__item:last-child::before {
  content: none;
}

.page-contact .flow__node {
  position: relative;
  z-index: 1;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-line-strong);
  background: var(--c-panel);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-signal);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-contact .flow__item:hover .flow__node {
  border-color: var(--c-signal);
  background: rgba(255, 122, 26, .1);
  color: var(--c-signal-soft);
}

.page-contact .flow__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: -.005em;
  color: var(--c-title);
}

.page-contact .flow__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-body);
}

.page-contact .flow-figure {
  margin: 0;
}

.page-contact .flow-figure .figure__frame {
  aspect-ratio: 10 / 7;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--c-panel), var(--c-night));
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .flow-figure .figure__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------------- 问题反馈直达 ---------------- */

.page-contact .fast-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 48px);
  border-radius: var(--r-xl);
  border: 1px solid var(--c-line-strong);
  background: linear-gradient(135deg, var(--c-panel), var(--c-deep) 60%, var(--c-night));
}

.page-contact .fast-panel::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -90px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 26, .22), rgba(255, 122, 26, 0) 68%);
  pointer-events: none;
}

.page-contact .fast-panel__title {
  margin: 12px 0 24px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--c-title);
}

.page-contact .fast-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  position: relative;
  z-index: 1;
}

@media (min-width: 760px) {
  .page-contact .fast-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-contact .fast-step {
  padding: 20px 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: rgba(11, 31, 51, .58);
  transition: border-color var(--t-fast) var(--ease);
}

.page-contact .fast-step:hover {
  border-color: var(--c-signal);
}

.page-contact .fast-step__num {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-signal);
}

.page-contact .fast-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-body);
}

.page-contact .fast-step a {
  color: var(--c-signal-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 192, 138, .42);
  word-break: break-all;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .fast-step a:hover {
  color: var(--c-paper);
  border-color: var(--c-paper);
}

.page-contact .fast-panel__foot {
  margin: 24px 0 0;
  position: relative;
  z-index: 1;
  font-size: 14px;
  line-height: 1.76;
  color: var(--c-mist);
}

/* ---------------- 底部信息带 ---------------- */

.page-contact .info-band {
  border-top: 1px solid var(--c-line);
  background: linear-gradient(180deg, rgba(5, 8, 13, .12), var(--c-night) 46%);
}

.page-contact .info-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

@media (min-width: 700px) {
  .page-contact .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 26px;
  }
}

@media (min-width: 1020px) {
  .page-contact .info-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-contact .info-item {
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--c-line-strong);
  transition: border-color var(--t-fast) var(--ease);
}

.page-contact .info-item:hover {
  border-color: var(--c-signal);
}

.page-contact .info-item__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--c-mist);
}

.page-contact .info-item__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-paper);
  word-break: break-all;
}

.page-contact .info-item__value a {
  color: var(--c-paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(159, 184, 204, .36);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .info-item__value a:hover {
  color: var(--c-signal-soft);
  border-color: var(--c-signal-soft);
}

.page-contact .info-band__note {
  margin: 26px 0 0;
  font-size: 13.5px;
  line-height: 1.76;
  color: var(--c-mist);
}

.page-contact .info-band__links {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px dashed var(--c-line);
}

/* ---------------- 宽屏收束 ---------------- */

@media (min-width: 1240px) {
  .page-contact .channel-card__body {
    font-size: 15.5px;
  }
  .page-contact .guide-item__body,
  .page-contact .flow__body p {
    font-size: 15px;
  }
}