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

.page-contact .co-crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(27, 42, 65, 0.66);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding-top: 18px;
}

.page-contact .co-crumbs a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

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

.page-contact .co-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  padding-bottom: clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--co-line);
  background:
    linear-gradient(180deg, rgba(217, 210, 195, 0.5) 0%, rgba(246, 241, 231, 0) 46%);
}

.page-contact .co-hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-contact .co-kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink);
}

.page-contact .co-kicker-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--paper);
  background-color: var(--flame);
  padding: 2px 7px;
}

.page-contact h1 {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-contact .co-lede {
  margin: 0;
  max-width: 40em;
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.8;
  color: rgba(27, 42, 65, 0.86);
}

.page-contact .co-hero-meta {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 14px 0 0;
  border-top: 2px solid var(--ink);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  font-size: 13px;
  color: rgba(27, 42, 65, 0.78);
}

.page-contact .co-hero-meta li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-contact .co-meta-num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  color: var(--flame);
}

.page-contact .co-hero-figure {
  margin: 0;
  border: 1px solid var(--co-line);
  background-color: var(--card);
  padding: 10px;
}

.page-contact .co-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  background-color: var(--stone);
}

.page-contact .co-hero-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(27, 42, 65, 0.72);
  border-top: 1px solid var(--line-soft);
  padding-top: 8px;
}

/* ---------- 通用分栏 ---------- */
.page-contact .co-section {
  padding: clamp(38px, 6vw, 76px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .co-grid {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
}

.page-contact .co-rail {
  border-left: 3px solid var(--sand);
  padding-left: 12px;
}

.page-contact .co-rail-label {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.page-contact .co-rail-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(27, 42, 65, 0.68);
}

.page-contact .co-content h2 {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(23px, 4.2vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-contact .co-intro {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(27, 42, 65, 0.8);
  max-width: 58em;
}

/* ---------- 合作方向 ---------- */
.page-contact .co-dir-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--co-line);
}

.page-contact .co-dir {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px 12px;
  padding: 18px 0 16px;
  border-bottom: 1px solid var(--co-line);
  transition: background-color 160ms ease, padding-left 160ms ease;
}

.page-contact .co-dir:focus {
  outline: 2px solid var(--flame);
  outline-offset: 2px;
}

.page-contact .co-dir-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--flame);
  padding-top: 4px;
}

.page-contact .co-dir-body h3 {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-contact .co-dir-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(27, 42, 65, 0.82);
}

.page-contact .co-dir-fit {
  margin-top: 10px !important;
  font-size: 13px !important;
  color: var(--forest) !important;
  border-left: 2px solid var(--sage);
  padding-left: 10px;
  transition: opacity 160ms ease, transform 160ms ease;
}

/* ---------- 联系渠道 ---------- */
.page-contact .co-contact-body {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-contact .co-contact-list {
  margin: 0;
  border-top: 1px solid var(--co-line);
}

.page-contact .co-contact-item {
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--co-line);
}

.page-contact .co-contact-item dt {
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--sage);
  margin-bottom: 8px;
}

.page-contact .co-contact-value {
  margin: 0 0 6px;
  font-size: clamp(19px, 4vw, 30px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .co-contact-item:first-child .co-contact-value {
  color: var(--flame);
}

.page-contact .co-contact-hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(27, 42, 65, 0.68);
}

.page-contact .co-hours {
  background-color: var(--forest);
  color: var(--paper);
  padding: 22px 20px 24px;
  border-top: 4px solid var(--sand);
}

.page-contact .co-hours-title {
  margin: 0 0 10px;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .co-hours-big {
  margin: 0;
  font-size: clamp(26px, 6vw, 34px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--paper);
}

.page-contact .co-hours-sub {
  margin: 6px 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-contact .co-hours-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.86);
}

.page-contact .co-legal {
  margin: 20px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--co-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(27, 42, 65, 0.62);
}

/* ---------- 邮件清单 ---------- */
.page-contact .co-check-list {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--co-line);
  border: 1px solid var(--co-line);
}

.page-contact .co-check-list li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  background-color: var(--card);
  padding: 16px 16px 18px;
}

.page-contact .co-check {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 2px solid var(--flame);
  position: relative;
}

.page-contact .co-check::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0;
  width: 4px;
  height: 8px;
  border-right: 2px solid var(--flame);
  border-bottom: 2px solid var(--flame);
  transform: rotate(42deg);
}

.page-contact .co-check-list h3 {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 800;
}

.page-contact .co-check-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(27, 42, 65, 0.8);
}

.page-contact .co-note-accordion {
  background-color: var(--stone);
  border-left: 4px solid var(--sand);
  padding: 4px 16px;
}

.page-contact .co-mail-line {
  margin: 0 0 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--clay);
  overflow-wrap: anywhere;
}

/* ---------- 流程 ---------- */
.page-contact .co-flow-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(23px, 4.2vw, 36px);
  line-height: 1.2;
}

.page-contact .co-steps {
  list-style: none;
  margin: 0 0 clamp(22px, 4vw, 34px);
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--co-line);
  border: 1px solid var(--co-line);
}

.page-contact .co-steps .step {
  background-color: var(--card);
  padding: 18px 16px 20px;
  border-top: 3px solid transparent;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-contact .co-steps .step:hover,
.page-contact .co-steps .step:focus-within {
  border-top-color: var(--flame);
  background-color: var(--paper);
}

.page-contact .co-steps .step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--flame);
  margin-bottom: 8px;
}

.page-contact .co-steps .step-title {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 7px;
}

.page-contact .co-steps .step-body {
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(27, 42, 65, 0.8);
}

.page-contact .co-flow-figure {
  margin: 0;
  border: 1px solid var(--co-line);
  background-color: var(--card);
  padding: 10px;
}

.page-contact .co-flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 20 / 13;
  object-fit: cover;
  background-color: var(--mist);
}

.page-contact .co-flow-figure figcaption {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(27, 42, 65, 0.72);
}

/* ---------- 延伸入口 ---------- */
.page-contact .co-links h2 {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(22px, 3.8vw, 32px);
}

.page-contact .co-link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--co-line);
  border-top: 1px solid var(--co-line);
  border-bottom: 1px solid var(--co-line);
}

.page-contact .co-link-list a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  gap: 2px 10px;
  padding: 16px 14px;
  background-color: var(--paper);
  text-decoration: none;
  color: var(--ink);
  transition: background-color 160ms ease;
}

.page-contact .co-link-list a:hover,
.page-contact .co-link-list a:focus-visible {
  background-color: var(--card);
}

.page-contact .co-link-list a:focus-visible {
  outline: 2px solid var(--flame);
  outline-offset: -2px;
}

.page-contact .co-link-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--flame);
  padding-top: 3px;
}

.page-contact .co-link-name {
  grid-area: name;
  font-size: 16px;
  font-weight: 800;
}

.page-contact .co-link-desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(27, 42, 65, 0.7);
}

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

  .page-contact .co-contact-body {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .co-link-list a {
    grid-template-columns: 44px minmax(0, 220px) minmax(0, 1fr);
    grid-template-areas: "num name desc";
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-contact .co-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }

  .page-contact .co-grid {
    grid-template-columns: 186px minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 60px);
  }

  .page-contact .co-rail {
    position: sticky;
    top: 76px;
    align-self: start;
  }

  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-dir {
    grid-template-columns: 46px minmax(0, 1fr);
    padding: 22px 0 20px;
  }

  .page-contact .co-dir:hover {
    background-color: rgba(217, 164, 65, 0.1);
    padding-left: 12px;
  }
}

@media (hover: hover) and (min-width: 960px) {
  .page-contact .co-dir-fit {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transform: translateY(-4px);
    margin-top: 0 !important;
    padding-top: 0;
  }

  .page-contact .co-dir:hover .co-dir-fit,
  .page-contact .co-dir:focus .co-dir-fit,
  .page-contact .co-dir:focus-within .co-dir-fit {
    opacity: 1;
    max-height: 90px;
    transform: translateY(0);
    margin-top: 10px !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-dir,
  .page-contact .co-dir-fit,
  .page-contact .co-steps .step,
  .page-contact .co-link-list a {
    transition: none;
  }
}