/* ================= 合作与联系 / page-contact ================= */
.page-contact {
  --ct-gap: clamp(14px, 2.2vw, 26px);
  --ct-pad: clamp(20px, 2.8vw, 32px);
  --ct-line: rgba(58, 74, 112, .55);
  --ct-panel: linear-gradient(168deg, rgba(22, 36, 79, .82), rgba(11, 23, 51, .94));
  position: relative;
  padding-bottom: clamp(36px, 6vw, 80px);
  color: var(--yk-mist);
}

/* ---------- 面包屑 ---------- */
.page-contact .yk-crumb {
  padding-top: clamp(12px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(24px, 3.6vw, 52px) clamp(28px, 4.2vw, 58px);
}

.page-contact .ct-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -20vw;
  left: 50%;
  transform: translateX(-50%);
  width: min(1180px, 128vw);
  height: min(640px, 78vw);
  background:
    radial-gradient(46% 58% at 26% 38%, rgba(55, 245, 193, .13), transparent 66%),
    radial-gradient(38% 52% at 80% 14%, rgba(245, 178, 60, .09), transparent 70%);
  pointer-events: none;
}

.page-contact .ct-hero h1 {
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  max-width: 17ch;
}

.page-contact .ct-hero .yk-lede {
  max-width: 60ch;
  margin-top: clamp(14px, 2vw, 22px);
}

.page-contact .ct-hero__facts {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ct-line);
  border: 1px solid var(--ct-line);
  border-radius: var(--yk-r2);
  overflow: hidden;
}

.page-contact .ct-hero__facts li {
  background: rgba(11, 23, 51, .74);
  padding: 16px 18px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-contact .ct-hero__facts .yk-num {
  font-family: var(--yk-font-num);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--yk-teal);
}

.page-contact .ct-hero__facts span:last-child {
  font-size: 14px;
  line-height: 1.5;
  color: var(--yk-haze);
}

@media (min-width: 640px) {
  .page-contact .ct-hero__facts {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 三条合作路径 ---------- */
.page-contact .ct-ways__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 66ch;
}

.page-contact .ct-ways__figure {
  position: relative;
  margin: clamp(20px, 3vw, 32px) 0 0;
  border-radius: var(--yk-r3);
  overflow: hidden;
  border: 1px solid var(--ct-line);
  background: var(--yk-indigo);
}

.page-contact .ct-ways__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 24, 0) 42%, rgba(5, 10, 24, .74));
  pointer-events: none;
}

.page-contact .ct-ways__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-contact .ct-ways__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ct-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .ct-way {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--ct-pad);
  border-radius: var(--yk-r3);
  background: var(--ct-panel);
  border: 1px solid var(--ct-line);
  transition: border-color .25s var(--yk-ease), transform .25s var(--yk-ease);
}

.page-contact .ct-way--lead {
  border-color: rgba(55, 245, 193, .38);
  box-shadow: 0 0 0 1px rgba(55, 245, 193, .12), 0 28px 60px -34px rgba(55, 245, 193, .55);
}

.page-contact .ct-way:hover,
.page-contact .ct-way:focus-within {
  border-color: rgba(55, 245, 193, .5);
  transform: translateY(-3px);
}

.page-contact .ct-way__label {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--yk-teal-deep);
}

.page-contact .ct-way__title {
  margin: 0;
  font-family: var(--yk-font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--yk-mist);
}

.page-contact .ct-way__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--yk-haze);
}

.page-contact .ct-way__more {
  margin-top: auto;
  padding-top: 6px;
  border-top: 1px solid rgba(58, 74, 112, .45);
}

.page-contact .ct-way__more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--yk-teal);
}

.page-contact .ct-way__more summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-way__more summary::after {
  content: "+";
  font-size: 15px;
  line-height: 1;
}

.page-contact .ct-way__more[open] summary::after {
  content: "–";
}

.page-contact .ct-way__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .ct-way__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--yk-haze);
}

.page-contact .ct-way__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--yk-teal-deep);
}

@media (min-width: 880px) {
  .page-contact .ct-ways__grid {
    grid-template-columns: 1.35fr 1fr 1fr;
    align-items: start;
  }
  .page-contact .ct-way--lead {
    transform: translateY(-10px);
  }
  .page-contact .ct-way--lead:hover,
  .page-contact .ct-way--lead:focus-within {
    transform: translateY(-13px);
  }
}

/* ---------- 对接节奏 ---------- */
.page-contact .ct-flow__track {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-contact .ct-flow__step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 20px;
  border-radius: var(--yk-r2);
  background: rgba(22, 36, 79, .58);
  border: 1px solid rgba(58, 74, 112, .45);
  border-top: 2px solid rgba(55, 245, 193, .36);
}

.page-contact .ct-flow__idx {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--yk-teal-deep);
}

.page-contact .ct-flow__step h3 {
  margin: 0;
  font-family: var(--yk-font-head);
  font-weight: 800;
  font-size: clamp(17px, 1.9vw, 20px);
  letter-spacing: -.01em;
  color: var(--yk-mist);
}

.page-contact .ct-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--yk-haze);
}

.page-contact .ct-flow__eta {
  margin-top: auto;
  align-self: flex-start;
  padding: 5px 11px;
  border-radius: var(--yk-r4);
  border: 1px solid rgba(18, 169, 138, .5);
  background: rgba(18, 169, 138, .1);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--yk-teal);
  transition: background-color .2s var(--yk-ease), border-color .2s var(--yk-ease);
}

.page-contact .ct-flow__step:hover .ct-flow__eta {
  background: rgba(55, 245, 193, .18);
  border-color: var(--yk-teal);
}

@media (min-width: 720px) {
  .page-contact .ct-flow__track {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* ---------- 伙伴类型 ---------- */
.page-contact .ct-partners__rows {
  margin-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--ct-line);
}

.page-contact .ct-partners__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 28px) 0;
  border-bottom: 1px solid var(--ct-line);
}

.page-contact .cp-no {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--yk-teal-deep);
}

.page-contact .ct-partners__row h3 {
  margin: 0;
  font-family: var(--yk-font-head);
  font-weight: 800;
  font-size: clamp(17px, 1.9vw, 21px);
  letter-spacing: -.01em;
  color: var(--yk-mist);
}

.page-contact .ct-partners__row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--yk-haze);
}

.page-contact .ct-partners__row .yk-tag {
  justify-self: start;
}

@media (min-width: 880px) {
  .page-contact .ct-partners__row {
    grid-template-columns: 56px minmax(150px, 220px) 1fr auto;
    align-items: start;
    gap: 24px;
  }
}

/* ---------- 联系渠道 ---------- */
.page-contact .ct-reach__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-contact .ct-reach__main h2 {
  margin: clamp(10px, 1.6vw, 16px) 0 0;
  max-width: 20ch;
}

.page-contact .ct-reach__intro {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--yk-haze);
}

.page-contact .ct-reach__list {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border-top: 1px solid var(--yk-line);
}

.page-contact .ct-reach__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(58, 74, 112, .5);
}

.page-contact .ct-reach__row dt {
  margin: 0;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--yk-haze);
}

.page-contact .ct-reach__row dd {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.65;
  color: var(--yk-mist);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .ct-reach__link {
  color: var(--yk-teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 245, 193, .42);
  transition: color .2s var(--yk-ease), border-color .2s var(--yk-ease);
}

.page-contact .ct-reach__link:hover,
.page-contact .ct-reach__link:focus-visible {
  color: var(--yk-mist);
  border-color: var(--yk-mist);
}

.page-contact .ct-reach__figure {
  margin: 0;
  border-radius: var(--yk-r3);
  overflow: hidden;
  border: 1px solid var(--ct-line);
  background: var(--yk-indigo);
  box-shadow: 0 30px 70px -44px rgba(55, 245, 193, .6);
}

.page-contact .ct-reach__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

@media (min-width: 920px) {
  .page-contact .ct-reach__inner {
    grid-template-columns: 1.12fr .88fr;
  }
}

/* ---------- 反馈提示 ---------- */
.page-contact .ct-tips__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ct-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .ct-tip {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--ct-pad);
  border-radius: var(--yk-r2);
  background: var(--ct-panel);
  border: 1px solid var(--ct-line);
  border-top: 2px solid rgba(245, 178, 60, .42);
}

.page-contact .ct-tip h3 {
  margin: 0;
  font-family: var(--yk-font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--yk-mist);
}

.page-contact .ct-tip p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--yk-haze);
}

.page-contact .ct-tip .ct-tip__eta {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--yk-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--yk-amber);
}

@media (min-width: 820px) {
  .page-contact .ct-tips__grid {
    grid-template-columns: 1.15fr .95fr .9fr;
  }
}

/* ---------- 常见合作问题 ---------- */
.page-contact .ct-faq__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-contact .ct-faq__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-contact .ct-faq__item {
  border-bottom: 1px solid var(--ct-line);
  padding: clamp(14px, 2vw, 20px) 0;
}

.page-contact .ct-faq__item:first-child {
  border-top: 1px solid var(--ct-line);
}

.page-contact .ct-faq__item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--yk-font-head);
  font-weight: 800;
  font-size: clamp(16px, 1.7vw, 18px);
  letter-spacing: -.01em;
  color: var(--yk-mist);
}

.page-contact .ct-faq__item summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-faq__item summary::after {
  content: "+";
  flex: none;
  font-family: var(--yk-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--yk-teal);
}

.page-contact .ct-faq__item[open] summary::after {
  content: "–";
}

.page-contact .ct-faq__item p {
  margin: 12px 0 2px;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--yk-haze);
}

@media (min-width: 900px) {
  .page-contact .ct-faq__inner {
    grid-template-columns: 320px 1fr;
  }
}

/* ---------- 页末信息 ---------- */
.page-contact .ct-note {
  margin-top: clamp(28px, 4vw, 48px);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(147, 164, 201, .62);
}

.page-contact .ct-note a {
  color: rgba(147, 164, 201, .85);
  text-decoration: none;
  border-bottom: 1px solid rgba(147, 164, 201, .35);
}

.page-contact .ct-note a:hover,
.page-contact .ct-note a:focus-visible {
  color: var(--yk-teal);
  border-color: var(--yk-teal);
}

/* ---------- 无障碍与动效降级 ---------- */
.page-contact .yk-crumb a:focus-visible,
.page-contact summary:focus-visible,
.page-contact .yk-tag:focus-visible {
  outline: 2px solid var(--yk-teal);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-way,
  .page-contact .ct-flow__eta,
  .page-contact .ct-reach__link,
  .page-contact .ct-note a {
    transition: none;
  }
  .page-contact .ct-way:hover,
  .page-contact .ct-way:focus-within,
  .page-contact .ct-way--lead,
  .page-contact .ct-way--lead:hover,
  .page-contact .ct-way--lead:focus-within {
    transform: none;
  }
}