.page-contact {
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

.page-contact .co-breadcrumb {
  padding-top: 22px;
  padding-bottom: 6px;
}

/* ---------- 主布局：左阅读 / 右常驻联系卡 ---------- */
.page-contact .co-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(56px, 9vw, 104px);
  align-items: start;
}

.page-contact .co-column {
  min-width: 0;
}

.page-contact .co-column > * + * {
  margin-top: clamp(40px, 5.5vw, 72px);
}

.page-contact .co-aside {
  display: grid;
  gap: 18px;
  min-width: 0;
}

/* ---------- 首屏偏置面板 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  clip-path: var(--bevel);
  background: var(--deep-sea);
  min-height: 330px;
  display: flex;
  align-items: flex-end;
}

.page-contact .co-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .58;
}

.page-contact .co-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(102deg, rgba(6, 40, 63, .95) 0%, rgba(6, 40, 63, .86) 40%, rgba(11, 74, 114, .54) 72%, rgba(6, 40, 63, .3) 100%);
}

.page-contact .co-hero__inner {
  position: relative;
  z-index: 2;
  padding: clamp(26px, 5vw, 54px);
  max-width: 780px;
}

.page-contact .co-hero .kicker {
  color: var(--gold);
}

.page-contact .co-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .co-hero__lead {
  margin: 18px 0 0;
  max-width: 620px;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(244, 247, 250, .86);
}

.page-contact .co-hero__meta {
  margin: 20px 0 0;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--gold);
}

/* ---------- 章节头 ---------- */
.page-contact .co-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.page-contact .co-section__title {
  margin: 0;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.34;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--deep-sea);
}

.page-contact .co-section__note {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--slate);
}

/* ---------- 三条合作线 ---------- */
.page-contact .co-tracks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .co-track {
  position: relative;
  background: var(--paper);
  padding: clamp(22px, 3vw, 30px) clamp(20px, 3vw, 32px);
  padding-left: clamp(26px, 3.4vw, 38px);
  clip-path: var(--bevel);
  box-shadow: 0 16px 36px -30px rgba(6, 40, 63, .5);
}

.page-contact .co-track::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--gold);
}

.page-contact .co-track--tech::before {
  background: var(--mint);
}

.page-contact .co-track--service::before {
  background: var(--coral);
}

.page-contact .co-track__code {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-contact .co-track__title {
  margin: 0 0 12px;
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--deep-sea);
}

.page-contact .co-track__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-contact .co-track__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-contact .co-track__tags li {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  padding: 4px 10px;
  color: var(--trench);
  background: rgba(11, 74, 114, .08);
  clip-path: var(--bevel-sm);
}

/* ---------- 深色流程面板 ---------- */
.page-contact .co-panel {
  position: relative;
  overflow: hidden;
  background: var(--deep-sea);
  color: var(--mist);
  padding: clamp(24px, 3.6vw, 44px);
  clip-path: var(--bevel);
}

.page-contact .co-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(114deg, rgba(255, 255, 255, .05) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

.page-contact .co-panel > * {
  position: relative;
  z-index: 1;
}

.page-contact .co-panel .co-section__head {
  border-bottom-color: rgba(244, 247, 250, .18);
}

.page-contact .co-panel .co-section__title {
  color: var(--paper);
}

.page-contact .co-panel .co-section__note {
  color: rgba(244, 247, 250, .6);
}

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

.page-contact .co-step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
}

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

.page-contact .co-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 21px;
  top: 50px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(62, 207, 168, .3));
}

.page-contact .co-step__mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--deep-sea);
  background: var(--gold);
  clip-path: var(--bevel-sm);
}

.page-contact .co-step__title {
  margin: 8px 0 8px;
  font-size: 17px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .co-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(244, 247, 250, .78);
}

.page-contact .co-flow__figure {
  margin: 30px 0 0;
  clip-path: var(--bevel);
  overflow: hidden;
  background: var(--trench);
}

.page-contact .co-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 资料清单 ---------- */
.page-contact .co-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .co-checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  background: var(--paper);
  padding: 16px 18px;
  border-left: 3px solid var(--line);
  clip-path: var(--bevel-sm);
}

.page-contact .co-checklist__item:nth-child(3n + 1) {
  border-left-color: var(--gold);
}

.page-contact .co-checklist__item:nth-child(3n + 2) {
  border-left-color: var(--mint);
}

.page-contact .co-checklist__item:nth-child(3n) {
  border-left-color: var(--coral);
}

.page-contact .co-checklist__no {
  font-size: 12px;
  padding-top: 2px;
  color: var(--slate);
}

.page-contact .co-checklist__label {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--deep-sea);
}

.page-contact .co-checklist__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 回复节奏 ---------- */
.page-contact .co-timing {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .co-timing__row {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .co-timing__name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--deep-sea);
}

.page-contact .co-timing__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-contact .co-timing__when {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  white-space: nowrap;
  padding: 4px 10px;
  color: var(--mint-deep);
  border: 1px solid rgba(62, 207, 168, .5);
  clip-path: var(--bevel-sm);
}

/* ---------- 备案与基本信息 ---------- */
.page-contact .co-facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .co-facts__item {
  display: grid;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .co-facts__key {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-contact .co-facts__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 右侧常驻卡片 ---------- */
.page-contact .co-card {
  position: relative;
  background: var(--paper);
  padding: clamp(22px, 3vw, 28px);
  clip-path: var(--bevel);
  box-shadow: 0 22px 46px -34px rgba(6, 40, 63, .6);
}

.page-contact .co-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--mint));
}

.page-contact .co-card__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-contact .co-card__title {
  margin: 8px 0 0;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--deep-sea);
}

.page-contact .co-card__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-contact .co-card__list > li {
  display: grid;
  gap: 3px;
  padding-bottom: 13px;
  border-bottom: 1px dashed var(--line);
}

.page-contact .co-card__list > li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .co-card__key {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-contact .co-card__val {
  font-size: 14.5px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--deep-sea);
  word-break: break-word;
}

.page-contact .co-card__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--slate);
}

.page-contact .co-card .btn {
  margin-top: 18px;
}

.page-contact .co-card--index {
  background: var(--mist);
  border: 1px solid var(--line);
  box-shadow: none;
}

.page-contact .co-card--index::before {
  background: linear-gradient(90deg, var(--trench), var(--mint));
}

.page-contact .co-links {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .co-links a {
  font-size: 14.5px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 559px) {
  .page-contact .co-hero {
    min-height: 280px;
  }

  .page-contact .co-hero__inner {
    padding: 22px 18px;
  }

  .page-contact .co-step {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .page-contact .co-step__mark {
    width: 36px;
    height: 36px;
    font-size: 12px;
  }

  .page-contact .co-step:not(:last-child)::after {
    left: 17px;
    top: 42px;
  }

  .page-contact .co-panel {
    padding: 22px 18px;
  }
}

/* ---------- 宽阔屏 ---------- */
@media (min-width: 720px) {
  .page-contact .co-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 18px;
  }

  .page-contact .co-timing__row {
    grid-template-columns: minmax(0, .36fr) minmax(0, 1fr) auto;
    gap: 20px;
    align-items: baseline;
  }

  .page-contact .co-facts__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 1024px) {
  .page-contact .co-layout {
    grid-template-columns: minmax(0, 1.62fr) minmax(320px, .92fr);
    gap: clamp(36px, 4vw, 66px);
  }

  .page-contact .co-aside {
    position: sticky;
    top: calc(var(--header-total) + 24px);
  }

  .page-contact .co-tracks {
    grid-template-columns: minmax(0, 1fr);
  }
}

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