.page-contact {
  --pc-radius: 20px;
  --pc-axis: rgba(51, 60, 70, 0.9);
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.page-contact .crumbs__sep {
  color: var(--line);
}

.page-contact .crumbs [aria-current="page"] {
  color: var(--signal);
}

/* ------- 首屏 ------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: 12px 0 clamp(40px, 7vw, 88px);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.page-contact .contact-hero__bg img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.17;
  filter: saturate(0.4) contrast(1.06);
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(90% 68% at 84% 2%, rgba(255, 90, 33, 0.14), transparent 62%),
    linear-gradient(180deg, rgba(14, 17, 22, 0.82) 0%, rgba(14, 17, 22, 0.94) 46%, var(--ink) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__intro {
  max-width: 720px;
  padding-top: clamp(20px, 4vw, 48px);
}

.page-contact .contact-hero__intro .h1 {
  margin: 14px 0 0;
  letter-spacing: -0.035em;
  line-height: 1.14;
}

.page-contact .contact-hero__intro .lede {
  margin: 18px 0 0;
  color: var(--mist);
  max-width: 46ch;
}

/* ------- 渠道矩阵 ------- */

.page-contact .channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(30px, 5vw, 60px);
}

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  background: linear-gradient(180deg, var(--panel) 0%, #131920 100%);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  transform: translateY(-2px);
  border-color: #47535f;
}

.page-contact .channel__tag {
  align-self: flex-start;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-contact .channel__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .channel__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .channel__value {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  font-variant-numeric: tabular-nums;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-all;
}

.page-contact .channel__value--addr {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--mist);
  word-break: normal;
}

.page-contact .channel__copy {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 6px 14px;
  border: 1px dashed var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-contact .channel__copy:hover,
.page-contact .channel__copy:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(55, 226, 213, 0.06);
}

.page-contact .channel__hint {
  margin: 0;
  font-size: var(--fs-12);
  line-height: 1.65;
  color: var(--mist);
  opacity: 1;
  max-height: none;
}

.page-contact .channel--mail {
  border-color: rgba(255, 197, 61, 0.5);
  box-shadow: inset 3px 0 0 var(--signal);
  background: linear-gradient(180deg, #1c2229 0%, #131920 100%);
}

.page-contact .channel--mail .channel__tag {
  color: var(--signal);
  border-color: rgba(255, 197, 61, 0.45);
}

.page-contact .channel--phone .channel__value {
  color: var(--cyan);
}

/* ------- 邮箱边界 ------- */

.page-contact .mail-scope .grid--7-3 {
  align-items: start;
}

.page-contact .mail-scope__main .h2 {
  margin: 12px 0 18px;
  letter-spacing: -0.03em;
}

.page-contact .mail-scope__main .prose + .prose {
  margin-top: 14px;
}

.page-contact .mail-scope__aside {
  padding: clamp(20px, 2.4vw, 28px);
}

.page-contact .mail-scope__aside .h3 {
  margin: 0 0 16px;
}

.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .scope-list__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--pc-axis);
}

.page-contact .scope-list__item:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .scope-list__text {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--paper);
}

.page-contact .scope-list__note {
  margin: 18px 0 0;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--mist);
}

/* ------- 横向主题带 ------- */

.page-contact .band {
  margin: clamp(28px, 5vw, 56px) 0;
}

.page-contact .band .band__inner {
  padding-inline: var(--pad);
}

.page-contact .band__title {
  max-width: 26ch;
  line-height: 1.3;
}

/* ------- 渠道说明 ------- */

.page-contact .section-head .h2 {
  margin: 12px 0 0;
  letter-spacing: -0.03em;
}

.page-contact .notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: clamp(24px, 4vw, 42px);
}

.page-contact .note {
  position: relative;
  padding: clamp(22px, 2.6vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  background: var(--panel);
}

.page-contact .note::before {
  content: "";
  position: absolute;
  left: clamp(22px, 2.6vw, 32px);
  top: 0;
  width: 46px;
  height: 3px;
  background: var(--lava);
}

.page-contact .note:last-child::before {
  background: var(--steel);
}

.page-contact .note__title {
  margin: 8px 0 12px;
  font-family: var(--font-head);
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .note__body {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--mist);
  max-width: 40ch;
}

.page-contact .note__points {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .note__points li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--paper);
}

.page-contact .note__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ------- 提交清单 ------- */

.page-contact .brief {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 42px);
}

.page-contact .brief__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px dashed var(--pc-axis);
}

.page-contact .brief__item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--pc-axis);
}

.page-contact .brief__num {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--lava);
  padding-top: 3px;
}

.page-contact .brief__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: var(--fs-16);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .brief__body p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
  max-width: 42ch;
}

.page-contact .brief__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-contact .brief__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--pc-radius);
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-contact .brief__figure figcaption {
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--mist);
  padding-left: 12px;
  border-left: 2px solid var(--signal);
}

.page-contact .brief__warn {
  margin-top: clamp(20px, 3vw, 32px);
}

/* ------- 响应节奏 ------- */

.page-contact .cadence {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: clamp(26px, 4vw, 46px);
  padding-left: 26px;
}

.page-contact .cadence::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--lava), rgba(255, 197, 61, 0.55) 55%, rgba(55, 226, 213, 0.35));
}

.page-contact .cadence__node {
  position: relative;
  padding-right: 6px;
}

.page-contact .cadence__dot {
  position: absolute;
  left: -26px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  background: var(--lava);
  animation: contact-pulse 2.4s var(--ease) infinite;
}

.page-contact .cadence__node:nth-child(2) .cadence__dot {
  background: var(--signal);
}

.page-contact .cadence__node:nth-child(3) .cadence__dot {
  background: var(--cyan);
}

.page-contact .cadence__when {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .cadence__title {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .cadence__node p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
  max-width: 38ch;
}

@keyframes contact-pulse {
  0%, 100% { opacity: 0.68; }
  50% { opacity: 1; }
}

/* ------- 收束 ------- */

.page-contact .contact-outro {
  border-top: 1px dashed var(--pc-axis);
}

.page-contact .contact-outro__box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: end;
  padding-top: clamp(20px, 3vw, 36px);
}

.page-contact .contact-outro__text .h3 {
  margin: 0 0 14px;
}

.page-contact .contact-outro__text .prose {
  max-width: 62ch;
  color: var(--mist);
}

.page-contact .contact-outro__meta {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.85;
}

.page-contact .contact-outro__mark {
  width: 160px;
  max-width: 100%;
  height: auto;
  color: var(--line);
  justify-self: start;
}

.page-contact .contact-outro__mark .mark-path {
  stroke: currentColor;
  stroke-width: 1.2;
  stroke-dasharray: 5 6;
  stroke-linecap: round;
}

.page-contact .contact-outro__mark .mark-dot--a { fill: var(--signal); }
.page-contact .contact-outro__mark .mark-dot--b { fill: var(--lava); }
.page-contact .contact-outro__mark .mark-dot--c { fill: var(--cyan); }

/* ------- 响应式 ------- */

@media (min-width: 760px) {
  .page-contact .crumbs {
    padding-top: 30px;
  }

  .page-contact .channels {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .channel--mail {
    grid-column: 1 / -1;
  }

  .page-contact .notes {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .brief {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-contact .contact-outro__box {
    grid-template-columns: 1fr auto;
  }

  .page-contact .contact-outro__mark {
    justify-self: end;
  }
}

@media (min-width: 1060px) {
  .page-contact .channels {
    grid-template-columns: 1.5fr 1fr 1fr;
    align-items: stretch;
  }

  .page-contact .channel--mail {
    grid-column: auto;
  }

  .page-contact .channel__hint {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity 0.2s var(--ease), max-height 0.2s var(--ease);
  }

  .page-contact .channel:hover .channel__hint,
  .page-contact .channel:focus-within .channel__hint {
    opacity: 1;
    max-height: 90px;
  }

  .page-contact .cadence {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
    padding-left: 0;
    padding-top: 46px;
  }

  .page-contact .cadence::before {
    left: 0;
    right: 0;
    top: 12px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--lava), rgba(255, 197, 61, 0.6) 52%, rgba(55, 226, 213, 0.4));
  }

  .page-contact .cadence__dot {
    left: 0;
    top: -40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .cadence__dot {
    animation: none;
  }

  .page-contact .channel,
  .page-contact .channel__copy,
  .page-contact .channel__hint {
    transition: none;
  }
}