.page-contact {
  --co-sec: clamp(46px, 6.4vw, 92px);
  --co-gap: clamp(16px, 2.2vw, 28px);
  --co-radius: 26px;
  --co-dark-line: rgba(95, 184, 216, 0.24);
  display: block;
  background: var(--paper);
  color: var(--text);
}

/* ============ 首屏 ============ */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.4vw, 40px) var(--pad) clamp(48px, 7vw, 96px);
  background: linear-gradient(158deg, var(--ink-900) 0%, var(--ink-800) 44%, var(--teal-700) 100%);
  color: #fff;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
}
.page-contact .co-hero::after {
  content: "";
  position: absolute;
  inset: auto -14% -26% -14%;
  height: 68%;
  background: repeating-linear-gradient(114deg, rgba(95, 184, 216, 0.18) 0 2px, transparent 2px 52px);
  transform: rotate(-5deg);
  pointer-events: none;
}
.page-contact .co-hero__inner {
  position: relative;
  max-width: var(--wrap);
  margin: 0 auto;
}
.page-contact .co-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}
.page-contact .co-hero .breadcrumb__item {
  color: rgba(201, 230, 242, 0.7);
}
.page-contact .co-hero .breadcrumb__item[aria-current="page"] {
  color: var(--live);
}
.page-contact .co-hero__eyebrow {
  color: var(--teal-400);
  margin: 0 0 clamp(10px, 1.4vw, 16px);
}
.page-contact .co-hero__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: clamp(2.2rem, 6.8vw, 4.8rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 900;
}
.page-contact .co-hero__title-em {
  color: var(--teal-400);
}
.page-contact .co-hero__lead {
  max-width: 64ch;
  margin: 0 0 clamp(24px, 3.2vw, 38px);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(244, 250, 253, 0.82);
}
.page-contact .co-hero__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin-bottom: clamp(24px, 3.2vw, 38px);
}
.page-contact .co-metric {
  border-left: 2px solid rgba(95, 184, 216, 0.42);
  padding-left: 14px;
  min-width: 0;
}
.page-contact .co-metric__value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}
.page-contact .co-metric__unit {
  margin-left: 4px;
  font-size: 0.5em;
  color: var(--teal-400);
}
.page-contact .co-metric__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: rgba(201, 230, 242, 0.68);
}
.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 通用分区 ============ */
.page-contact .co-section {
  padding: var(--co-sec) var(--pad);
}
.page-contact .co-section--dark {
  background: linear-gradient(172deg, var(--ink-900) 0%, var(--ink-800) 100%);
  color: #fff;
}
.page-contact .co-section--mist {
  background: linear-gradient(180deg, var(--mist) 0%, #e2f1f8 100%);
}
.page-contact .co-section--dark .section-head__title {
  color: #fff;
}
.page-contact .co-section--dark .section-head__note {
  color: rgba(201, 230, 242, 0.72);
}
.page-contact .co-section--dark .section-head__key {
  color: var(--live);
}

/* ============ 01 合作类型 ============ */
.page-contact .co-banner {
  margin: 0 0 clamp(24px, 3vw, 38px);
  border-radius: var(--co-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--mist);
}
.page-contact .co-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}
.page-contact .co-banner__cap {
  display: block;
  padding: 12px 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-2);
  background: rgba(244, 250, 253, 0.94);
  border-top: 1px solid var(--line);
}
.page-contact .co-type-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
}
.page-contact .co-type {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.2vw, 26px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--co-radius);
  overflow: hidden;
}
.page-contact .co-type::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--teal-600), var(--teal-400));
}
.page-contact .co-type__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--teal-600);
}
.page-contact .co-type__title {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-contact .co-type__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}
.page-contact .co-type__fit {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-2);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
}

/* ============ 02 合作流程轨道 ============ */
.page-contact .co-track-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-contact .co-track-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid rgba(95, 184, 216, 0.34);
  border-radius: var(--pill);
  background: rgba(18, 92, 134, 0.24);
  color: rgba(244, 250, 253, 0.88);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.24s ease, border-color 0.24s ease, color 0.24s ease, transform 0.24s ease;
}
.page-contact .co-track-btn::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(183, 242, 74, 0.42);
  box-shadow: 0 0 0 3px rgba(183, 242, 74, 0.1);
  flex: none;
}
.page-contact .co-track-btn:hover {
  border-color: var(--teal-400);
  transform: translateY(-1px);
}
.page-contact .co-track-btn:focus-visible {
  outline: 2px solid var(--live);
  outline-offset: 2px;
}
.page-contact .co-track-btn[aria-pressed="true"],
.page-contact .co-track-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.page-contact .co-track-btn[aria-pressed="true"]::before,
.page-contact .co-track-btn.is-active::before {
  background: var(--live);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.24);
}
.page-contact .co-track-panel {
  padding: clamp(18px, 2.4vw, 30px);
  background: rgba(14, 51, 80, 0.68);
  border: 1px solid var(--co-dark-line);
  border-radius: var(--co-radius);
}
.page-contact .co-track-panel + .co-track-panel {
  margin-top: var(--co-gap);
}
.page-contact .co-track-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding-bottom: 18px;
  margin-bottom: 20px;
  border-bottom: 1px dashed var(--co-dark-line);
}
.page-contact .co-track-panel__title {
  margin: 0;
  font-size: clamp(17px, 2.1vw, 21px);
  font-weight: 800;
  color: #fff;
}
.page-contact .co-track-panel__fit {
  margin: 0;
  font-size: 13.5px;
  color: rgba(201, 230, 242, 0.74);
}
.page-contact .co-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}
.page-contact .co-step {
  position: relative;
  padding: 0 0 22px 54px;
}
.page-contact .co-step:last-child {
  padding-bottom: 0;
}
.page-contact .co-step::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 40px;
  bottom: 0;
  width: 2px;
  background: rgba(95, 184, 216, 0.26);
}
.page-contact .co-step:last-child::after {
  display: none;
}
.page-contact .co-step__num {
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--teal-400);
  color: var(--live);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
}
.page-contact .co-step__title {
  margin: 4px 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}
.page-contact .co-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(201, 230, 242, 0.74);
}

/* ============ 03 区域机会 ============ */
.page-contact .co-region-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(18px, 2.6vw, 26px);
}
.page-contact .co-region-btn {
  appearance: none;
  padding: 10px 20px;
  border: 1px solid var(--line-2);
  border-radius: var(--pill);
  background: #fff;
  color: var(--text-2);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.22s ease, border-color 0.22s ease, color 0.22s ease;
}
.page-contact .co-region-btn:hover {
  border-color: var(--teal-600);
  color: var(--teal-700);
}
.page-contact .co-region-btn:focus-visible {
  outline: 2px solid var(--teal-600);
  outline-offset: 2px;
}
.page-contact .co-region-btn[aria-pressed="true"],
.page-contact .co-region-btn.is-active {
  background: var(--teal-700);
  border-color: var(--teal-700);
  color: #fff;
}
.page-contact .co-region-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
}
.page-contact .co-region {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.2vw, 24px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--co-radius);
}
.page-contact .co-region__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.page-contact .co-region__name {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-contact .co-region__count {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  color: var(--teal-700);
}
.page-contact .co-region__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-2);
}

/* ============ 04 准备材料 ============ */
.page-contact .co-need {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}
.page-contact .co-need .section-head {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}
.page-contact .co-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-contact .co-checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}
.page-contact .co-checklist li strong {
  color: var(--text);
  font-weight: 700;
}
.page-contact .co-checklist li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal-600);
  box-shadow: 0 0 0 4px rgba(30, 134, 184, 0.14);
}
.page-contact .co-need__media {
  margin: 0;
  border-radius: var(--co-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
.page-contact .co-need__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* ============ 05 合作支持 ============ */
.page-contact .co-support-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
}
.page-contact .co-support {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: clamp(18px, 2.2vw, 26px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--co-radius);
}
.page-contact .co-support__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(150deg, var(--teal-700), var(--teal-600));
  color: #fff;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
}
.page-contact .co-support__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
}
.page-contact .co-support__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-2);
}

/* ============ 06 联系通道 ============ */
.page-contact .co-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--co-gap);
}
.page-contact .co-contact__panel {
  padding: clamp(22px, 3vw, 38px);
  background: rgba(14, 51, 80, 0.72);
  border: 1px solid var(--co-dark-line);
  border-radius: var(--co-radius);
}
.page-contact .co-channel {
  padding: 18px 0;
  border-bottom: 1px dashed var(--co-dark-line);
}
.page-contact .co-channel:first-child {
  padding-top: 0;
}
.page-contact .co-channel:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-contact .co-channel__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal-400);
}
.page-contact .co-channel__v {
  display: inline-block;
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(17px, 2.4vw, 23px);
  font-weight: 700;
  line-height: 1.4;
  color: #fff;
  text-decoration: none;
  word-break: break-word;
  transition: color 0.2s ease;
}
.page-contact a.co-channel__v:hover {
  color: var(--live);
}
.page-contact .co-channel__v--plain {
  font-size: clamp(15px, 1.8vw, 18px);
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0;
}
.page-contact .co-contact__aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 2.6vw, 30px);
  background: rgba(6, 26, 43, 0.62);
  border: 1px solid rgba(95, 184, 216, 0.2);
  border-radius: var(--co-radius);
}
.page-contact .co-contact-aside-title {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 800;
  line-height: 1.45;
  color: #fff;
}
.page-contact .co-contact-aside-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(201, 230, 242, 0.76);
}
.page-contact .co-aside-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}
.page-contact .co-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid rgba(95, 184, 216, 0.2);
}
.page-contact .co-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--teal-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-contact .co-link:hover {
  color: var(--live);
  border-bottom-color: var(--live);
}

/* ============ 响应式 ============ */
@media (min-width: 600px) {
  .page-contact .co-region-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 640px) {
  .page-contact .co-type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-contact .co-hero__metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-contact .co-step {
    padding: 0 14px 0 0;
  }
  .page-contact .co-step:last-child {
    padding-right: 0;
  }
  .page-contact .co-step::after {
    left: 50%;
    top: 17px;
    bottom: auto;
    width: 100%;
    height: 2px;
    transform: translateX(20px);
  }
  .page-contact .co-step__num {
    position: relative;
    left: auto;
    top: auto;
    margin-bottom: 12px;
  }
  .page-contact .co-step__title {
    margin-top: 0;
  }
  .page-contact .co-support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .co-need {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }
  .page-contact .co-contact {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 1000px) {
  .page-contact .co-region-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-contact .co-type-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-track-btn,
  .page-contact .co-region-btn,
  .page-contact .co-link,
  .page-contact .co-channel__v {
    transition: none;
  }
  .page-contact .co-track-btn:hover {
    transform: none;
  }
}