.page-contact {
  --contact-line: rgba(58, 66, 82, 0.9);
  --contact-card-bg: #12203a;
  --contact-text: rgba(243, 238, 227, 0.76);
  --contact-text-soft: rgba(243, 238, 227, 0.68);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.4vw, 48px) 0 clamp(40px, 5.4vw, 88px);
  background:
    radial-gradient(120% 100% at 92% -10%, rgba(244, 83, 31, 0.16), transparent 58%),
    radial-gradient(90% 80% at -10% 110%, rgba(47, 163, 122, 0.12), transparent 55%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(127, 144, 168, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 144, 168, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(90% 80% at 45% 18%, #000 0%, transparent 82%);
  mask-image: radial-gradient(90% 80% at 45% 18%, #000 0%, transparent 82%);
}

.page-contact .contact-hero > .container {
  position: relative;
  z-index: 1;
}

.page-contact .crumbs {
  margin-bottom: clamp(18px, 2.4vw, 32px);
}

.page-contact .page-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--copper);
}

.page-contact .page-head__eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--flame);
  flex: none;
}

.page-contact .page-head__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-size: clamp(32px, 5.2vw, 68px);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.page-contact .page-head__lead {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--bone);
  opacity: 0.82;
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: end;
  margin-top: clamp(14px, 2vw, 24px);
}

.page-contact .contact-hero__figure {
  position: relative;
  margin: 0;
  padding: 10px;
  background: var(--ink-2);
  border: 1px solid var(--contact-line);
  box-shadow: 16px 16px 0 -4px rgba(58, 66, 82, 0.42);
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

/* 四角刻度 */
.page-contact .corners {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-contact .corners::before,
.page-contact .corners::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--copper);
  opacity: 0.85;
}

.page-contact .corners::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .corners::after {
  right: -2px;
  bottom: -2px;
  border-left: 0;
  border-top: 0;
}

/* ---------- 章节公共 ---------- */
.page-contact .section {
  padding: clamp(44px, 6vw, 96px) 0;
}

.page-contact .section__head {
  display: grid;
  gap: 12px;
  max-width: 58ch;
  margin-bottom: clamp(26px, 3.6vw, 48px);
}

.page-contact .section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--flame);
}

.page-contact .section__title {
  margin: 0;
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.page-contact .section__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 01 联系卡 ---------- */
.page-contact .contact-channels {
  padding-top: clamp(30px, 4vw, 60px);
}

.page-contact .contact-card {
  position: relative;
  padding: clamp(22px, 3.2vw, 48px);
  background: linear-gradient(155deg, #12203a 0%, #0c1728 62%, #0a1424 100%);
  border: 1px solid var(--ember);
  box-shadow: 14px 14px 0 -3px rgba(58, 66, 82, 0.38);
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 3px;
  background: var(--flame);
}

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

.page-contact .contact-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: clamp(20px, 2.6vw, 32px) 0;
  border-bottom: 1px solid var(--contact-line);
}

.page-contact .contact-item:first-child {
  padding-top: 6px;
}

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

.page-contact .contact-item__aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.page-contact .contact-item__key {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .contact-item__main {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-contact .contact-item__value {
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.1vw, 26px);
  letter-spacing: -0.01em;
  color: var(--copper);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color 0.3s var(--ease);
}

.page-contact .contact-item__value:hover,
.page-contact .contact-item__value:focus-visible {
  color: var(--flame);
}

.page-contact .contact-item__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--contact-text);
}

.page-contact .contact-item__addr {
  margin: 0;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--bone);
}

.page-contact .contact-item__map {
  display: block;
  width: min(180px, 70%);
  height: auto;
  opacity: 0.9;
}

/* ---------- 02 咨询主题 ---------- */
.page-contact .topic-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 1.6vw, 20px);
}

.page-contact .topic-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2vw, 26px);
  background: var(--contact-card-bg);
  border: 1px solid var(--contact-line);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background 0.35s var(--ease);
}

.page-contact .topic-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 38px;
  height: 3px;
  background: var(--flame);
}

.page-contact .topic-card__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.page-contact .topic-card__title {
  margin: 0;
  font-size: clamp(17px, 1.5vw, 20px);
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .topic-card__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--contact-text-soft);
}

.page-contact .topic-card__desc a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 154, 70, 0.45);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-contact .topic-card__desc a:hover,
.page-contact .topic-card__desc a:focus-visible {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-contact .topic-card__prep {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--contact-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .topic-card__prep b {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-contact .topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 154, 70, 0.55);
  background: #14243f;
}

/* ---------- 03 处理节奏 ---------- */
.page-contact .flow-media {
  margin: 0 0 clamp(28px, 4vw, 52px);
}

.page-contact .flow-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--contact-line);
}

.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 2.6vw, 30px);
}

.page-contact .flow-step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.page-contact .flow-step__node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--flame);
  color: var(--flame);
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-contact .flow-step:nth-child(3) .flow-step__node,
.page-contact .flow-step:nth-child(4) .flow-step__node {
  border-color: var(--jade);
  color: var(--jade);
}

.page-contact .flow-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 22px;
  top: 50px;
  bottom: -24px;
  width: 2px;
  background: linear-gradient(180deg, rgba(244, 83, 31, 0.5), rgba(47, 163, 122, 0.32));
}

.page-contact .flow-step__title {
  margin: 0;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .flow-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--contact-text-soft);
}

.page-contact .contact-aside {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin: clamp(32px, 4vw, 54px) 0 0;
  padding: clamp(16px, 2vw, 22px) clamp(18px, 2.2vw, 26px);
  background: rgba(18, 32, 58, 0.6);
  border-left: 3px solid var(--jade);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--contact-text);
}

.page-contact .contact-aside__mark {
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: 0.55em;
  border: 2px solid var(--jade);
  transform: rotate(45deg);
}

.page-contact .contact-aside a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 154, 70, 0.45);
}

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

/* ---------- 04 订阅与合作 ---------- */
.page-contact .contact-biz {
  padding-bottom: clamp(56px, 7vw, 110px);
}

.page-contact .biz-panel {
  position: relative;
  padding: clamp(26px, 3.6vw, 56px);
  background: linear-gradient(140deg, rgba(18, 32, 58, 0.96), rgba(8, 18, 34, 0.98));
  border: 1px solid var(--ember);
  box-shadow: -16px 16px 0 -4px rgba(58, 66, 82, 0.3);
}

.page-contact .biz-panel__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 44px);
}

.page-contact .biz-panel__intro {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .biz-panel__intro .label {
  justify-self: start;
}

.page-contact .biz-panel__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--contact-text);
}

.page-contact .biz-list {
  list-style: none;
  margin: 0 0 clamp(22px, 2.6vw, 32px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .biz-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 238, 227, 0.78);
}

.page-contact .biz-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 12px;
  height: 2px;
  background: var(--copper);
}

.page-contact .biz-panel__foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

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

@media (min-width: 820px) {
  .page-contact .contact-item {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    gap: clamp(18px, 3vw, 44px);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    position: relative;
    gap: clamp(18px, 2.2vw, 26px);
  }

  .page-contact .flow::before {
    content: "";
    position: absolute;
    top: 22px;
    left: 6%;
    right: 6%;
    height: 2px;
    background: linear-gradient(90deg, var(--flame), var(--copper) 55%, var(--jade));
    opacity: 0.45;
  }

  .page-contact .flow-step:not(:last-child)::after {
    display: none;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: clamp(32px, 5vw, 80px);
  }

  .page-contact .biz-panel__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .topic-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-contact .topic-card:nth-child(1),
  .page-contact .topic-card:nth-child(2) {
    grid-column: span 3;
  }

  .page-contact .topic-card:nth-child(3),
  .page-contact .topic-card:nth-child(4),
  .page-contact .topic-card:nth-child(5) {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .topic-card,
  .page-contact .contact-item__value {
    transition: none;
  }

  .page-contact .topic-card:hover {
    transform: none;
  }
}