.page-contact {
  --contact-line: rgba(201, 215, 228, 0.16);
  --contact-line-strong: rgba(201, 215, 228, 0.32);
  --contact-surface: #0D2B4A;
  --contact-surface-2: #061A2F;
  --contact-focus: 0 0 0 3px rgba(184, 255, 60, 0.35);
  background: var(--ink);
  color: var(--ice);
  overflow-x: hidden;
}

.page-contact a {
  color: inherit;
}

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

/* ============ 首屏 ============ */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(28px, 4.5vw, 56px) 0 clamp(48px, 8vw, 96px);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 12%, rgba(184, 255, 60, 0.1), transparent 48%),
    radial-gradient(circle at 8% 90%, rgba(56, 214, 255, 0.07), transparent 42%);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -140px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 107, 44, 0.16), transparent 65%);
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-contact .breadcrumb ol {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--silver);
}

.page-contact .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  color: var(--rock);
}

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

.page-contact .breadcrumb a:hover {
  color: var(--lime);
}

.page-contact .contact-hero .eyebrow {
  color: var(--lime);
  margin-bottom: 16px;
}

.page-contact .contact-hero h1 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(34px, 6.8vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--ice);
  margin: 0 0 22px;
  max-width: 14em;
}

.page-contact .contact-hero h1::after {
  content: "";
  display: block;
  width: 68px;
  height: 6px;
  margin-top: 18px;
  background: var(--lime);
  border-radius: 3px;
  transform: rotate(-2deg);
  transform-origin: left center;
}

.page-contact .contact-hero__break {
  display: none;
}

.page-contact .contact-hero__lead {
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.75;
  color: var(--silver);
  max-width: 40em;
  margin: 0 0 26px;
}

.page-contact .contact-hero__pills {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .contact-hero__pills .tag {
  border: 1px solid var(--contact-line-strong);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--silver);
  background: rgba(201, 215, 228, 0.05);
}

.page-contact .contact-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .contact-hero__media {
  position: relative;
  border-radius: clamp(20px, 3vw, 32px);
  overflow: hidden;
  box-shadow: 0 30px 80px -40px rgba(0, 0, 0, 0.85);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 55%, rgba(184, 255, 60, 0.14) 100%);
  pointer-events: none;
}

/* ============ 共用章节头 ============ */
.page-contact .section-head {
  margin-bottom: clamp(24px, 4vw, 40px);
  max-width: 60em;
}

.page-contact .section-head .eyebrow {
  color: var(--lime);
  margin-bottom: 12px;
}

.page-contact .section-head h2 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.005em;
  margin: 0 0 14px;
}

.page-contact .section-head p {
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.7;
  margin: 0;
}

/* ============ 合作方向 ============ */
.page-contact .coop-tracks {
  background: var(--ice);
  color: var(--coal);
  padding: clamp(44px, 7vw, 96px) 0;
  position: relative;
}

.page-contact .coop-tracks::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--cyan) 40%, var(--signal) 75%, var(--win) 100%);
}

.page-contact .coop-tracks .section-head h2 {
  color: var(--coal);
}

.page-contact .coop-tracks .section-head p {
  color: #3a4a5c;
}

.page-contact .coop-tabs {
  position: relative;
}

.page-contact .coop-tabs__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .coop-tabs__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 18px;
}

.page-contact .coop-tag {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  border-radius: 16px;
  border: 1.5px solid rgba(10, 17, 24, 0.1);
  background: #fff;
  color: var(--coal);
  cursor: pointer;
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
  position: relative;
  overflow: hidden;
}

.page-contact .coop-tag::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 4px;
  width: 0;
  transition: width .3s var(--ease);
}

.page-contact .coop-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -18px rgba(10, 17, 24, 0.4);
}

.page-contact .coop-tag__num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-contact .coop-tag__name {
  font-weight: 800;
  font-size: 17px;
  line-height: 1.2;
}

.page-contact .coop-tag__hint {
  font-size: 12px;
  color: #59718a;
}

.page-contact .coop-tag--lime::after { background: var(--lime); }
.page-contact .coop-tag--cyan::after { background: var(--cyan); }
.page-contact .coop-tag--signal::after { background: var(--signal); }
.page-contact .coop-tag--win::after { background: var(--win); }

.page-contact #coop-data:checked ~ .coop-tabs__nav [for="coop-data"],
.page-contact #coop-content:checked ~ .coop-tabs__nav [for="coop-content"],
.page-contact #coop-brand:checked ~ .coop-tabs__nav [for="coop-brand"],
.page-contact #coop-region:checked ~ .coop-tabs__nav [for="coop-region"] {
  border-color: var(--coal);
  background: var(--coal);
  color: var(--ice);
  transform: translateY(-3px);
  box-shadow: 0 18px 36px -22px rgba(6, 26, 47, 0.7);
}

.page-contact #coop-data:checked ~ .coop-tabs__nav [for="coop-data"] .coop-tag__num,
.page-contact #coop-content:checked ~ .coop-tabs__nav [for="coop-content"] .coop-tag__num,
.page-contact #coop-brand:checked ~ .coop-tabs__nav [for="coop-brand"] .coop-tag__num,
.page-contact #coop-region:checked ~ .coop-tabs__nav [for="coop-region"] .coop-tag__num {
  color: var(--lime);
}

.page-contact #coop-data:checked ~ .coop-tabs__nav [for="coop-data"] .coop-tag__hint,
.page-contact #coop-content:checked ~ .coop-tabs__nav [for="coop-content"] .coop-tag__hint,
.page-contact #coop-brand:checked ~ .coop-tabs__nav [for="coop-brand"] .coop-tag__hint,
.page-contact #coop-region:checked ~ .coop-tabs__nav [for="coop-region"] .coop-tag__hint {
  color: var(--silver);
}

.page-contact #coop-data:checked ~ .coop-tabs__nav [for="coop-data"]::after,
.page-contact #coop-content:checked ~ .coop-tabs__nav [for="coop-content"]::after,
.page-contact #coop-brand:checked ~ .coop-tabs__nav [for="coop-brand"]::after,
.page-contact #coop-region:checked ~ .coop-tabs__nav [for="coop-region"]::after {
  width: 100%;
}

.page-contact .coop-tabs__panels {
  border-radius: 22px;
  background: var(--ink);
  color: var(--ice);
  padding: clamp(20px, 3.6vw, 40px);
  border: 1px solid rgba(184, 255, 60, 0.14);
  position: relative;
}

.page-contact .coop-tabs__panels::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(20px, 3.6vw, 40px);
  width: 44px;
  height: 3px;
  background: var(--lime);
  border-radius: 2px;
}

.page-contact .coop-panel {
  display: none;
  animation: contact-panel-in .35s var(--ease);
}

.page-contact #coop-data:checked ~ .coop-tabs__panels .coop-panel[data-coop="data"],
.page-contact #coop-content:checked ~ .coop-tabs__panels .coop-panel[data-coop="content"],
.page-contact #coop-brand:checked ~ .coop-tabs__panels .coop-panel[data-coop="brand"],
.page-contact #coop-region:checked ~ .coop-tabs__panels .coop-panel[data-coop="region"] {
  display: block;
}

@keyframes contact-panel-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-contact .coop-panel__head h3 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(20px, 2.8vw, 26px);
  margin: 8px 0 10px;
  color: var(--ice);
}

.page-contact .coop-panel__head p {
  color: var(--silver);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 22px;
  max-width: 42em;
}

.page-contact .coop-panel__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-contact .coop-panel__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-contact .coop-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .coop-panel__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ice);
}

.page-contact .coop-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--lime);
  border-radius: 3px;
  transform: rotate(45deg);
}

/* ============ 能力与响应 ============ */
.page-contact .coop-capability {
  background: var(--ink);
  padding: clamp(44px, 7vw, 96px) 0;
  position: relative;
}

.page-contact .coop-capability .section-head h2 {
  color: var(--ice);
}

.page-contact .coop-capability .section-head p {
  color: var(--silver);
}

.page-contact .capability-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-contact .capability-block {
  position: relative;
  padding: 22px 22px 24px;
  border-radius: 18px;
  background: var(--contact-surface);
  border: 1px solid var(--contact-line);
  overflow: hidden;
}

.page-contact .capability-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 4px;
  background: var(--cyan);
}

.page-contact .capability-block:nth-child(2)::before { background: var(--lime); }
.page-contact .capability-block:nth-child(3)::before { background: var(--signal); }
.page-contact .capability-block:nth-child(4)::before { background: var(--win); }

.page-contact .capability-block__num {
  display: inline-block;
  font-size: 14px;
  color: var(--rock);
  letter-spacing: 0.12em;
  margin-bottom: 6px;
}

.page-contact .capability-block h3 {
  font-weight: 800;
  font-size: 19px;
  margin: 0 0 10px;
  color: var(--ice);
}

.page-contact .capability-block p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0;
}

.page-contact .response-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--contact-line);
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--contact-line);
}

.page-contact .response-band__item {
  background: var(--contact-surface-2);
  padding: 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-contact .response-band__num {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  color: var(--lime);
  line-height: 1;
}

.page-contact .response-band__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--silver);
}

/* ============ 流程 ============ */
.page-contact .coop-flow {
  background: var(--ice);
  color: var(--coal);
  padding: clamp(44px, 7vw, 96px) 0;
  position: relative;
}

.page-contact .coop-flow::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: linear-gradient(180deg, transparent, rgba(13, 43, 74, 0.05));
  pointer-events: none;
}

.page-contact .coop-flow .section-head h2 {
  color: var(--coal);
}

.page-contact .coop-flow .section-head p {
  color: #3a4a5c;
}

.page-contact .coop-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  position: relative;
  z-index: 1;
}

.page-contact .flow-tree {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  counter-reset: flow;
}

.page-contact .flow-tree::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 20px;
  bottom: 30px;
  width: 2px;
  background: repeating-linear-gradient(180deg, rgba(6, 26, 47, 0.18) 0, rgba(6, 26, 47, 0.18) 6px, transparent 6px, transparent 12px);
}

.page-contact .flow-tree > li {
  position: relative;
  margin-bottom: 12px;
}

.page-contact .flow-node {
  background: #fff;
  border: 1px solid rgba(10, 17, 24, 0.1);
  border-radius: 14px;
  padding: 14px 16px 14px 56px;
  position: relative;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-contact .flow-node[open] {
  border-color: rgba(6, 26, 47, 0.35);
  box-shadow: 0 16px 32px -28px rgba(6, 26, 47, 0.55);
}

.page-contact .flow-node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-right: 26px;
  position: relative;
}

.page-contact .flow-node summary::-webkit-details-marker { display: none; }

.page-contact .flow-node summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--rock);
  transition: transform .2s var(--ease), color .2s var(--ease);
}

.page-contact .flow-node[open] summary::after {
  content: "−";
  color: var(--coal);
  transform: rotate(0deg);
}

.page-contact .flow-node__num {
  position: absolute;
  left: 16px;
  top: 13px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--lime);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.page-contact .flow-node__title {
  font-weight: 800;
  font-size: 17px;
  color: var(--coal);
  font-family: var(--sans);
}

.page-contact .flow-node__time {
  font-size: 12px;
  color: #59718a;
  margin-left: auto;
}

.page-contact .flow-node p {
  margin: 10px 0 2px;
  font-size: 14.5px;
  line-height: 1.7;
  color: #3a4a5c;
}

.page-contact .flow-aside {
  background: var(--ink);
  color: var(--ice);
  border-radius: 20px;
  padding: clamp(20px, 3vw, 30px);
  position: relative;
  overflow: hidden;
  align-self: start;
}

.page-contact .flow-aside::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle at 100% 0%, rgba(184, 255, 60, 0.24), transparent 70%);
  pointer-events: none;
}

.page-contact .flow-aside h3 {
  font-weight: 800;
  font-size: 19px;
  margin: 0 0 16px;
  color: var(--ice);
}

.page-contact .flow-aside ul {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .flow-aside li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--silver);
}

.page-contact .flow-aside li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--lime);
  border-radius: 2px;
}

.page-contact .flow-aside p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-contact .flow-aside a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============ 联系与表单 ============ */
.page-contact .coop-contact {
  background: var(--ink);
  padding: clamp(44px, 7vw, 96px) 0;
  position: relative;
  overflow: hidden;
}

.page-contact .coop-contact::before {
  content: "";
  position: absolute;
  left: -80px;
  top: 40px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(56, 214, 255, 0.1), transparent 65%);
  pointer-events: none;
}

.page-contact .coop-contact .section-head h2 {
  color: var(--ice);
}

.page-contact .coop-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .contact-card {
  background: var(--contact-surface);
  border-radius: 20px;
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--contact-line);
  position: relative;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  width: 52px;
  height: 4px;
  background: var(--lime);
  border-radius: 2px;
}

.page-contact .contact-card__head {
  margin: 8px 0 22px;
}

.page-contact .contact-card__head h3 {
  font-weight: 800;
  font-size: 22px;
  margin: 0 0 8px;
  color: var(--ice);
}

.page-contact .contact-card__head p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--silver);
  margin: 0;
}

.page-contact .contact-card__list {
  margin: 0 0 22px;
  display: grid;
  gap: 16px;
}

.page-contact .contact-card__row {
  display: grid;
  gap: 4px;
}

.page-contact .contact-card__row dt {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-contact .contact-card__row dd {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--ice);
  line-height: 1.3;
  word-break: break-word;
}

.page-contact .contact-card__link {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1.5px dashed transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .contact-card__link:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-contact .contact-card__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver);
  margin: 0 0 20px;
  padding-top: 16px;
  border-top: 1px solid var(--contact-line);
}

.page-contact .contact-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .coop-form {
  background: var(--contact-surface-2);
  border-radius: 20px;
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--contact-line);
  scroll-margin-top: 110px;
}

.page-contact .coop-form__head {
  margin-bottom: 22px;
}

.page-contact .coop-form__head h3 {
  font-weight: 800;
  font-size: 22px;
  margin: 0 0 8px;
  color: var(--ice);
}

.page-contact .coop-form__head p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--silver);
  margin: 0;
}

.page-contact .coop-form__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

.page-contact .coop-form__field {
  display: grid;
  gap: 6px;
}

.page-contact .coop-form__field--full {
  margin-bottom: 14px;
}

.page-contact .coop-form__label {
  font-size: 13px;
  font-weight: 600;
  color: var(--silver);
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-contact .coop-form__req {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--signal);
  border: 1px solid rgba(255, 107, 44, 0.4);
  border-radius: 4px;
  padding: 1px 6px;
  line-height: 1.3;
}

.page-contact .coop-form__input,
.page-contact .coop-form__select,
.page-contact .coop-form__textarea {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ice);
  background: rgba(6, 26, 47, 0.7);
  border: 1px solid var(--contact-line-strong);
  border-radius: 10px;
  padding: 11px 13px;
  line-height: 1.4;
  transition: border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-contact .coop-form__select {
  appearance: none;
  -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 49%, var(--lime) 50%), linear-gradient(135deg, var(--lime) 50%, transparent 51%);
  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

.page-contact .coop-form__textarea {
  resize: vertical;
  min-height: 100px;
}

.page-contact .coop-form__input:focus,
.page-contact .coop-form__select:focus,
.page-contact .coop-form__textarea:focus {
  outline: none;
  border-color: var(--lime);
  background: rgba(184, 255, 60, 0.06);
  box-shadow: var(--contact-focus);
}

.page-contact .coop-form__input:invalid:not(:placeholder-shown),
.page-contact .coop-form__textarea:invalid:not(:placeholder-shown) {
  border-color: rgba(255, 107, 44, 0.55);
}

.page-contact .coop-form__footer {
  margin-top: 6px;
  display: grid;
  gap: 12px;
}

.page-contact .coop-form__hint {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--rock);
  margin: 0;
}

.page-contact .coop-form__hint a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============ FAQ ============ */
.page-contact .coop-faq {
  background: var(--ice);
  color: var(--coal);
  padding: clamp(44px, 7vw, 96px) 0;
}

.page-contact .coop-faq .section-head h2 {
  color: var(--coal);
}

.page-contact .faq-list {
  display: grid;
  gap: 10px;
  max-width: 900px;
}

.page-contact .faq-item {
  background: #fff;
  border: 1px solid rgba(10, 17, 24, 0.1);
  border-radius: 14px;
  padding: 16px 20px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-contact .faq-item[open] {
  border-color: rgba(6, 26, 47, 0.35);
  box-shadow: 0 16px 32px -28px rgba(6, 26, 47, 0.4);
}

.page-contact .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  position: relative;
  padding-right: 26px;
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--coal);
}

.page-contact .faq-item summary::-webkit-details-marker { display: none; }

.page-contact .faq-item summary::before {
  content: "—";
  color: var(--lime);
  font-family: var(--mono);
  font-weight: 700;
  flex-shrink: 0;
  transition: color .2s var(--ease);
}

.page-contact .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  font-family: var(--mono);
  font-size: 20px;
  color: var(--rock);
  line-height: 1;
}

.page-contact .faq-item[open] summary::before {
  color: var(--signal);
}

.page-contact .faq-item[open] summary::after {
  content: "−";
  color: var(--coal);
}

.page-contact .faq-item p {
  margin: 12px 0 2px;
  font-size: 14.5px;
  line-height: 1.75;
  color: #3a4a5c;
  padding-left: 26px;
}

/* ============ 收尾 ============ */
.page-contact .coop-outro {
  background: var(--ink);
  padding: clamp(44px, 7vw, 96px) 0 clamp(28px, 4vw, 48px);
  position: relative;
  overflow: hidden;
}

.page-contact .coop-outro::before {
  content: "";
  position: absolute;
  top: 30%;
  left: 50%;
  width: 1px;
  height: 120px;
  background: linear-gradient(180deg, transparent, var(--lime), transparent);
  transform: translateX(-50%);
  opacity: 0.5;
}

.page-contact .coop-outro__wrap {
  position: relative;
}

.page-contact .coop-outro__head {
  max-width: 52em;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .coop-outro__head .eyebrow {
  color: var(--lime);
  margin-bottom: 12px;
}

.page-contact .coop-outro__head h2 {
  font-weight: 800;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--ice);
  margin: 0 0 14px;
}

.page-contact .coop-outro__head p {
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.7;
  color: var(--silver);
  margin: 0;
}

.page-contact .coop-outro__head a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .coop-outro__media {
  border-radius: clamp(20px, 3vw, 32px);
  overflow: hidden;
  position: relative;
}

.page-contact .coop-outro__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(6, 26, 47, 0.55) 100%);
  pointer-events: none;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-contact .contact-hero__break { display: inline; }

  .page-contact .coop-form__row {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .response-band {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .capability-row {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .coop-panel__cols {
    grid-template-columns: 1fr 1fr;
    gap: 34px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-contact .coop-tabs__nav {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }

  .page-contact .coop-flow__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .coop-contact__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 20px;
    align-items: stretch;
  }

  .page-contact .capability-block {
    padding: 26px 26px 28px;
  }

  .page-contact .faq-item {
    padding: 18px 24px;
  }

  .page-contact .faq-item summary {
    font-size: 17px;
  }
}

@media (min-width: 1200px) {
  .page-contact .capability-row {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .contact-hero {
    padding-top: clamp(40px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-panel {
    animation: none;
  }
  .page-contact .coop-tag,
  .page-contact .flow-node,
  .page-contact .faq-item,
  .page-contact .coop-form__input,
  .page-contact .coop-form__select,
  .page-contact .coop-form__textarea,
  .page-contact .contact-card__link,
  .page-contact .faq-item summary::before,
  .page-contact .faq-item summary::after {
    transition: none;
  }
  .page-contact .coop-tag:hover {
    transform: none;
  }
  .page-contact #coop-data:checked ~ .coop-tabs__nav [for="coop-data"],
  .page-contact #coop-content:checked ~ .coop-tabs__nav [for="coop-content"],
  .page-contact #coop-brand:checked ~ .coop-tabs__nav [for="coop-brand"],
  .page-contact #coop-region:checked ~ .coop-tabs__nav [for="coop-region"] {
    transform: none;
  }
}
<<<END>>>