.page-contact {
  --co-gap: clamp(18px, 2.6vw, 34px);
  --co-rule: rgba(201, 211, 230, 0.16);
  --co-rule-strong: rgba(201, 211, 230, 0.28);
  --co-rule-light: rgba(26, 31, 51, 0.12);
  --co-dim: rgba(201, 211, 230, 0.7);
}

/* ---------- 首屏 ---------- */

.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4vw, 52px) clamp(34px, 5vw, 62px);
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  top: -28%;
  right: -14%;
  width: 74vw;
  height: 74vw;
  max-width: 900px;
  max-height: 900px;
  background: radial-gradient(circle at 50% 50%, rgba(75, 46, 131, 0.55), rgba(11, 16, 38, 0) 62%);
  pointer-events: none;
  z-index: 0;
}

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

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(26px, 4vw, 52px);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .breadcrumb a {
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--aurora);
}

.page-contact .co-hero__grid {
  display: grid;
  gap: clamp(26px, 3.4vw, 46px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .co-hero h1 {
  margin: 14px 0 22px;
  max-width: 18ch;
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

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

.page-contact .co-hero__lead .prose {
  max-width: 36em;
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-contact .co-hero__facts {
  display: grid;
  gap: 16px 24px;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  align-content: end;
}

.page-contact .co-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-contact .co-fact__num {
  font-size: clamp(19px, 2.2vw, 26px);
  letter-spacing: -0.02em;
  color: var(--aurora);
  line-height: 1.2;
}

.page-contact .co-fact__label {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--co-dim);
  line-height: 1.5;
}

.page-contact .co-hero__media {
  margin: clamp(30px, 4.5vw, 60px) 0 0;
}

.page-contact .co-hero__media img,
.page-contact .co-panel__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 合作方向 ---------- */

.page-contact .co-dirs {
  padding-block: 0 clamp(56px, 7vw, 100px);
}

.page-contact .co-head {
  max-width: 52em;
}

.page-contact .co-head h2 {
  margin: 14px 0 16px;
}

.page-contact .co-seg {
  margin: clamp(26px, 3.4vw, 42px) 0 clamp(24px, 3vw, 36px);
}

.page-contact .co-panels {
  position: relative;
}

.page-contact .co-panel[hidden] {
  display: none;
}

.page-contact .co-panel + .co-panel {
  margin-top: 30px;
}

.page-contact .co-panel {
  animation: co-panel-in 0.36s var(--ease) both;
}

@keyframes co-panel-in {
  from {
    opacity: 0;
    transform: translateX(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-contact .co-panel__grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--co-rule);
  padding-top: clamp(24px, 3vw, 36px);
}

.page-contact .co-panel__title {
  margin: 0 0 14px;
}

.page-contact .co-panel__lead {
  margin: 0 0 clamp(22px, 2.6vw, 30px);
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--co-dim);
}

.page-contact .co-panel__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-contact .co-panel__out,
.page-contact .co-panel__need {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .co-panel__out li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-contact .co-panel__out li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 1px;
  background: var(--aurora);
}

.page-contact .co-panel__side {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-contact .co-panel__need li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--co-dim);
}

.page-contact .co-panel__need li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 7px;
  border: 1px solid var(--nebula);
  background: rgba(75, 46, 131, 0.35);
  transform: rotate(45deg);
}

.page-contact .co-panel__media {
  margin: 4px 0 0;
}

/* ---------- 洽谈流程 ---------- */

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

.page-contact .co-flow__list {
  list-style: none;
  margin: clamp(28px, 3.6vw, 48px) 0 0;
  padding: 0;
}

.page-contact .co-flow__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 34px);
  padding: clamp(20px, 2.6vw, 32px) 0;
  border-top: 1px solid var(--co-rule-light);
}

.page-contact .co-flow__step:last-child {
  border-bottom: 1px solid var(--co-rule-light);
}

.page-contact .co-flow__idx {
  padding-top: 6px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--nebula);
}

.page-contact .co-flow__title {
  margin: 0 0 6px;
  font-size: clamp(19px, 2.1vw, 25px);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .co-flow__time {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--nebula);
}

.page-contact .co-flow__desc {
  margin: 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 材料清单 ---------- */

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

.page-contact .co-kit__grid {
  display: grid;
  gap: clamp(28px, 3.6vw, 52px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .co-kit__head h2 {
  margin: 14px 0 16px;
}

.page-contact .co-kit__groups {
  display: grid;
  gap: clamp(22px, 2.6vw, 32px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .co-kit__group {
  padding-top: 18px;
  border-top: 2px solid var(--nebula);
}

.page-contact .co-kit__group-title {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-contact .co-kit__items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .co-kit__items li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: #4a5266;
}

.page-contact .co-kit__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--nebula);
}

/* ---------- 联系我们 ---------- */

.page-contact .co-contact {
  padding-block: clamp(56px, 7vw, 100px) clamp(40px, 5vw, 64px);
}

.page-contact .co-contact__split {
  display: grid;
  gap: var(--co-gap);
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(26px, 3.4vw, 44px);
}

.page-contact .co-mail {
  padding: clamp(26px, 3.4vw, 46px);
  background: linear-gradient(152deg, rgba(75, 46, 131, 0.6), rgba(19, 27, 58, 0.94) 64%);
  border: 1px solid rgba(53, 224, 200, 0.22);
}

.page-contact .co-mail__label {
  margin: 0 0 20px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--aurora);
}

.page-contact .co-mail__addr {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.9vw, 22px);
  line-height: 1.45;
  color: var(--paper);
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.page-contact .co-mail__hint {
  margin: 0 0 26px;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--co-dim);
}

.page-contact .co-mail__meta {
  list-style: none;
  margin: 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--co-rule);
  display: grid;
  gap: 12px;
}

.page-contact .co-mail__meta li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  font-size: 13.5px;
}

.page-contact .co-mail__meta span {
  min-width: 5.5em;
  letter-spacing: 0.08em;
  color: var(--co-dim);
}

.page-contact .co-mail__meta strong {
  font-weight: 400;
  color: var(--silver);
}

.page-contact .co-tags {
  display: grid;
  gap: clamp(14px, 1.8vw, 20px);
  align-content: start;
}

.page-contact .co-tag {
  padding: clamp(20px, 2.4vw, 30px);
  background: rgba(19, 27, 58, 0.74);
  border: 1px solid var(--co-rule);
}

.page-contact .co-tag__key {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--co-dim);
}

.page-contact .co-tag__val {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.5;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-contact .co-tag--addr .co-tag__val {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0.01em;
}

.page-contact .co-tag__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--co-dim);
}

/* ---------- 响应与后续 ---------- */

.page-contact .co-response {
  padding-block: 0 clamp(56px, 7vw, 100px);
}

.page-contact .co-response__grid {
  display: grid;
  gap: clamp(26px, 3.4vw, 48px);
  grid-template-columns: minmax(0, 1fr);
  padding-top: clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--co-rule);
}

.page-contact .co-response__grid h2 {
  margin: 14px 0 16px;
}

.page-contact .co-resp {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.2vw, 26px);
}

.page-contact .co-resp__item {
  display: grid;
  gap: 6px;
  padding-left: 20px;
  border-left: 2px solid var(--aurora);
}

.page-contact .co-resp__time {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--aurora);
}

.page-contact .co-resp__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.76;
  color: var(--co-dim);
}

/* ---------- 响应式 ---------- */

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

@media (min-width: 860px) {
  .page-contact .co-panel__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(30px, 3.6vw, 56px);
  }

  .page-contact .co-kit__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-contact .co-response__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
  }

  .page-contact .co-hero__facts {
    grid-template-columns: minmax(0, 1fr);
    padding-left: clamp(18px, 2.2vw, 30px);
    border-left: 1px solid var(--co-rule);
  }

  .page-contact .co-contact__split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .co-kit__groups {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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