.page-contact {
  --pc-gap: clamp(20px, 3vw, 40px);
  --pc-sheet-bg: #FCFBF6;
  --pc-line: rgba(43, 59, 82, 0.18);
  background: var(--paper);
  color: var(--ink-900);
  padding-bottom: clamp(40px, 7vw, 96px);
}

/* ---------- 首屏：斜切深墨蓝 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(88px, 13vw, 168px);
  background:
    radial-gradient(120% 90% at 88% -20%, rgba(34, 230, 211, 0.20), transparent 62%),
    linear-gradient(158deg, #07111F 0%, #0E1D33 58%, #142543 100%);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(43, 59, 82, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 59, 82, 0.6) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.4;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 88%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 88%);
}

.page-contact .contact-hero .shell {
  position: relative;
  z-index: 2;
}

.page-contact .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 184, 200, 0.4);
}

.page-contact .breadcrumb__link:hover,
.page-contact .breadcrumb__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .hero-kicker {
  margin: clamp(20px, 4vw, 40px) 0 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .hero-title {
  margin: 14px 0 0;
  max-width: 20em;
  font-size: clamp(28px, 5.2vw, 54px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.page-contact .hero-lede {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: #C9D6E4;
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .hero-meta {
  margin: 22px 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 版面 ---------- */
.page-contact .contact-board {
  display: grid;
  gap: var(--pc-gap);
  margin-top: clamp(-64px, -5vw, -24px);
  position: relative;
  z-index: 3;
}

/* ---------- 左侧联系卡 ---------- */
.page-contact .support-card {
  background: var(--ink-800);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 48px -32px rgba(7, 17, 31, 0.85);
  color: var(--paper);
}

.page-contact .support-card__media {
  border: 0;
  border-bottom: 1px solid var(--grid);
  border-radius: 0;
}

.page-contact .support-card__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  opacity: 0.9;
}

.page-contact .support-card__body {
  padding: clamp(18px, 2.4vw, 26px);
}

.page-contact .support-card__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .support-card__title {
  margin: 10px 0 16px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #FFFFFF;
}

.page-contact .channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .channel {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(43, 59, 82, 0.9);
}

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

.page-contact .channel__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .channel__value {
  font-size: 15px;
  line-height: 1.6;
  color: #FFFFFF;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.page-contact a.channel__value {
  border-bottom: 1px solid rgba(34, 230, 211, 0.5);
}

.page-contact a.channel__value:hover,
.page-contact a.channel__value:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .support-card__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .support-card__badge {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(43, 59, 82, 0.9);
}

.page-contact .support-card__badge-text {
  font-size: 12px;
  color: var(--mist);
  letter-spacing: 0.04em;
}

/* ---------- 右侧纸片叠层 ---------- */
.page-contact .feedback-stack {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
  min-width: 0;
}

.page-contact .sheet {
  position: relative;
  min-width: 0;
  padding: clamp(20px, 3vw, 36px);
  background: var(--pc-sheet-bg);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgba(252, 251, 246, 0.9),
    9px 9px 0 -3px rgba(43, 59, 82, 0.10);
}

.page-contact .sheet__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-contact .sheet__title {
  margin: 10px 0 0;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .sheet__intro {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: #2A3A4D;
}

.page-contact .sheet__note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 122, 47, 0.09);
  font-size: 13px;
  line-height: 1.75;
  color: #3A2A1E;
}

/* ---------- 反馈类型切换 ---------- */
.page-contact .fb-switch > input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .fb-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-contact .fb-tab {
  display: inline-block;
  padding: 8px 15px;
  font-size: 13px;
  line-height: 1.2;
  color: var(--ink-700);
  background: #FFFFFF;
  border: 1px solid rgba(43, 59, 82, 0.28);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.page-contact .fb-tab:hover {
  border-color: var(--ink-900);
}

.page-contact .fb-panels {
  margin-top: 18px;
  border-top: 1px solid var(--pc-line);
  padding-top: 16px;
}

.page-contact .fb-panel {
  display: none;
}

.page-contact .fb-panel h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.55;
  font-weight: 700;
  color: var(--ink-900);
}

.page-contact .fb-panel p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2A3A4D;
}

.page-contact .fb-panel__hint {
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.02em;
  color: #4A5C70 !important;
}

.page-contact #fb-1:checked ~ .fb-tabs label[for="fb-1"],
.page-contact #fb-2:checked ~ .fb-tabs label[for="fb-2"],
.page-contact #fb-3:checked ~ .fb-tabs label[for="fb-3"],
.page-contact #fb-4:checked ~ .fb-tabs label[for="fb-4"],
.page-contact #fb-5:checked ~ .fb-tabs label[for="fb-5"] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--cyan);
}

.page-contact #fb-1:checked ~ .fb-panels #fb-panel-1,
.page-contact #fb-2:checked ~ .fb-panels #fb-panel-2,
.page-contact #fb-3:checked ~ .fb-panels #fb-panel-3,
.page-contact #fb-4:checked ~ .fb-panels #fb-panel-4,
.page-contact #fb-5:checked ~ .fb-panels #fb-panel-5 {
  display: block;
}

.page-contact .fb-switch > input:focus-visible ~ .fb-tabs .fb-tab {
  outline: 1px dashed rgba(34, 230, 211, 0.6);
  outline-offset: 2px;
}

/* ---------- 提交清单 ---------- */
.page-contact .checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--pc-line);
}

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

.page-contact .checklist__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 3px;
}

.page-contact .checklist__body h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-contact .checklist__body p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2A3A4D;
}

.page-contact .checklist-figure {
  margin: 22px 0 0;
}

.page-contact .checklist-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  display: block;
}

/* ---------- 邮件模板 ---------- */
.page-contact .mail-template {
  margin: 18px 0 0;
  padding: 18px;
  background: var(--ink-900);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--cyan);
}

.page-contact .mail-template code {
  font-family: inherit;
  white-space: pre;
}

.page-contact .mail-template__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: #4A5C70;
}

.page-contact .sheet .btn--primary {
  margin-top: 18px;
}

/* ---------- 处理节奏 ---------- */
.page-contact .pace-list {
  list-style: none;
  counter-reset: pace;
  margin: 20px 0 0;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--pc-line);
  display: grid;
  gap: 18px;
}

.page-contact .pace-step {
  position: relative;
}

.page-contact .pace-step::before {
  counter-increment: pace;
  content: counter(pace);
  position: absolute;
  left: -31px;
  top: 1px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  color: var(--cyan);
}

.page-contact .pace-step h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-contact .pace-step p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #2A3A4D;
}

/* ---------- 合作与媒体 ---------- */
.page-contact .topic-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .topic-item {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: rgba(124, 108, 255, 0.07);
  border-left: 3px solid var(--violet);
}

.page-contact .topic-item__code {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: #4B3FCE;
}

.page-contact .topic-item__text {
  font-size: 14px;
  line-height: 1.7;
  color: #2A3A4D;
}

/* ---------- 邮寄 ---------- */
.page-contact .postal-address {
  display: grid;
  gap: 6px;
  margin: 18px 0 0;
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--pc-line);
  font-style: normal;
}

.page-contact .postal-address__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .postal-address__value {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

/* ---------- 相关链接 ---------- */
.page-contact .link-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .link-list .footer-link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 59, 82, 0.3);
}

.page-contact .link-list .footer-link:hover,
.page-contact .link-list .footer-link:focus-visible {
  color: #0A6F66;
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 1000px) {
  .page-contact .contact-board {
    grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .support-card {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-contact .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 22px;
  }

  .page-contact .checklist__item:nth-child(5) {
    grid-column: 1 / -1;
    border-bottom: 0;
    padding-bottom: 0;
  }
}

@media (min-width: 1320px) {
  .page-contact .hero-lede {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact * {
    transition: none !important;
    animation: none !important;
  }
}