/* ===== 合作联系页 · page-contact ===== */

.page-contact {
  --ct-gap: clamp(18px, 3vw, 40px);
  --ct-pad: clamp(18px, 2.8vw, 30px);
  position: relative;
  padding-bottom: clamp(48px, 8vw, 96px);
  color: var(--paper);
  background:
    radial-gradient(120% 58% at 90% -8%, rgba(47, 211, 200, 0.10), transparent 62%),
    radial-gradient(86% 48% at 2% 3%, rgba(182, 240, 58, 0.07), transparent 64%),
    var(--deep);
}

.page-contact .bs-crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */

.page-contact .ct-hero {
  display: grid;
  gap: clamp(26px, 4.4vw, 52px);
  padding: clamp(20px, 4vw, 44px) 0 clamp(34px, 6vw, 72px);
}

.page-contact .ct-hero__copy {
  display: grid;
  gap: clamp(12px, 1.8vw, 20px);
  align-content: start;
}

.page-contact .ct-hero h1 {
  margin: 0;
  max-width: 16ch;
  font-size: clamp(31px, 6.2vw, 62px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-contact .bs-lede {
  margin: 0;
  max-width: 54ch;
  color: var(--cold);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
}

.page-contact .ct-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-contact .ct-hero__panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(10px, 1.4vw, 16px);
  align-content: end;
}

.page-contact .ct-hero__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
  min-height: 104px;
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--stand);
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-contact .ct-hero__panel:hover {
  border-color: var(--accent);
}

.page-contact .ct-hero__panel--lg {
  grid-column: 1 / -1;
  min-height: 146px;
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
  clip-path: var(--cut);
}

.page-contact .ct-hero__panel--lg:hover {
  border-color: transparent;
}

.page-contact .ct-hero__figure {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.page-contact .ct-hero__panel--lg .ct-hero__figure {
  font-size: clamp(38px, 7vw, 68px);
}

.page-contact .ct-hero__caption {
  font-size: 13px;
  line-height: 1.55;
  letter-spacing: 0.05em;
  color: var(--cold);
}

.page-contact .ct-hero__panel--lg .ct-hero__caption {
  color: rgba(8, 25, 43, 0.78);
  max-width: 42ch;
}

/* ---------- 章节骨架 ---------- */

.page-contact .ct-sec {
  padding: clamp(36px, 6vw, 82px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .ct-head {
  display: grid;
  gap: 10px;
  max-width: 68ch;
}

.page-contact .ct-head h2 {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 38px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-contact .ct-head__lede {
  margin: 0;
  max-width: 62ch;
  color: var(--cold);
  font-size: clamp(14px, 1.3vw, 17px);
  line-height: 1.82;
}

/* ---------- 合作方向 ---------- */

.page-contact .ct-ways__grid {
  display: grid;
  gap: var(--ct-gap);
  margin-top: clamp(22px, 3.4vw, 40px);
}

.page-contact .ct-ways__col {
  display: block;
}

.page-contact .ct-way {
  position: relative;
  overflow: hidden;
  padding: var(--ct-pad);
  background: var(--stand);
  border: 1px solid var(--line);
  clip-path: var(--cut);
  transition: border-color 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-contact .ct-way + .ct-way {
  margin-top: clamp(14px, 2.2vw, 24px);
}

.page-contact .ct-way--venue { --ct-accent: var(--moss); }
.page-contact .ct-way--campus { --ct-accent: var(--amber); }
.page-contact .ct-way--media { --ct-accent: var(--cyan); }

.page-contact .ct-way::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--ct-accent, var(--neon));
  transform: scaleY(0.26);
  transform-origin: top center;
  transition: transform 0.36s var(--ease);
}

.page-contact .ct-way:hover::before,
.page-contact .ct-way:focus-within::before {
  transform: scaleY(1);
}

.page-contact .ct-way:hover,
.page-contact .ct-way:focus-within {
  border-color: var(--ct-accent, var(--neon));
}

.page-contact .ct-way h3 {
  margin: 0 0 10px;
  padding-right: 46px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-contact .ct-way p {
  margin: 0;
  max-width: 46ch;
  color: var(--cold);
  font-size: 15px;
  line-height: 1.8;
}

.page-contact .ct-way__mark {
  position: absolute;
  top: clamp(16px, 2.2vw, 22px);
  right: clamp(16px, 2.2vw, 22px);
  width: 26px;
  height: 26px;
  border-top: 2px solid var(--ct-accent, var(--neon));
  border-right: 2px solid var(--ct-accent, var(--neon));
  transition: transform 0.34s var(--ease);
}

.page-contact .ct-way:hover .ct-way__mark,
.page-contact .ct-way:focus-within .ct-way__mark {
  transform: translate(-7px, 7px);
}

.page-contact .ct-way__list {
  list-style: none;
  margin: clamp(12px, 1.8vw, 18px) 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .ct-way__list li {
  position: relative;
  padding-left: 17px;
  color: var(--cold);
  font-size: 13.5px;
  line-height: 1.72;
}

.page-contact .ct-way__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 9px;
  height: 2px;
  background: var(--ct-accent, var(--neon));
  transform: skewX(-34deg);
}

.page-contact .ct-ways__figure {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
}

/* ---------- 洽谈流程 ---------- */

.page-contact .ct-flow {
  list-style: none;
  margin: clamp(22px, 3.4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-contact .ct-step {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px) clamp(16px, 2.2vw, 24px);
  background: linear-gradient(180deg, rgba(16, 46, 73, 0.92), rgba(6, 19, 32, 0.92));
  border: 1px solid var(--line);
  clip-path: var(--cut-sm);
  transition: border-color 0.26s var(--ease);
}

.page-contact .ct-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--amber);
  transform: skewX(-38deg);
  transform-origin: left center;
  transition: width 0.36s var(--ease);
}

.page-contact .ct-step:hover,
.page-contact .ct-step:focus-within {
  border-color: rgba(255, 122, 42, 0.7);
}

.page-contact .ct-step:hover::before,
.page-contact .ct-step:focus-within::before {
  width: 64px;
}

.page-contact .ct-step__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-contact .ct-step h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.35;
}

.page-contact .ct-step p {
  margin: 0;
  color: var(--cold);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 提前准备 ---------- */

.page-contact .ct-prep__list {
  list-style: none;
  margin: clamp(22px, 3.4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
  counter-reset: ct-prep;
}

.page-contact .ct-prep__item {
  position: relative;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 22px) clamp(16px, 2.2vw, 22px) clamp(44px, 5.4vw, 62px);
  background: rgba(6, 19, 32, 0.6);
  border: 1px solid var(--line-soft);
  clip-path: var(--cut-sm);
  counter-increment: ct-prep;
  transition: border-color 0.24s var(--ease);
}

.page-contact .ct-prep__item:hover {
  border-color: var(--line);
}

.page-contact .ct-prep__item::before {
  content: counter(ct-prep, decimal-leading-zero);
  position: absolute;
  left: clamp(14px, 2vw, 20px);
  top: clamp(17px, 2.2vw, 23px);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-contact .ct-prep__item h3 {
  margin: 0 0 7px;
  font-size: clamp(15px, 1.7vw, 18px);
  font-weight: 700;
  line-height: 1.35;
}

.page-contact .ct-prep__item p {
  margin: 0;
  color: var(--cold);
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 联系信息 ---------- */

.page-contact .ct-map {
  margin: 0 0 clamp(22px, 3.4vw, 36px);
  max-width: 760px;
}

.page-contact .ct-contacts {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--line-soft);
}

.page-contact .ct-contacts__row {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 2vw, 18px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .ct-contacts__term {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-contact .ct-contacts__val {
  margin: 0;
  min-width: 0;
}

.page-contact .ct-contacts__val--plain {
  color: var(--paper);
  font-size: 15px;
  line-height: 1.7;
}

.page-contact .ct-copy {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: 100%;
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--paper);
  font: inherit;
  cursor: pointer;
  clip-path: var(--cut-sm);
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .ct-copy:hover,
.page-contact .ct-copy:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(182, 240, 58, 0.06);
}

.page-contact .ct-copy__text {
  font-family: var(--font-mono);
  font-size: 14.5px;
  letter-spacing: 0.01em;
  word-break: break-all;
}

.page-contact .ct-copy__state {
  flex: none;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-contact .ct-copy.is-copied {
  border-color: var(--accent);
}

.page-contact .ct-copy.is-copied .ct-copy__state {
  color: var(--accent);
}

.page-contact .ct-reply {
  margin-top: clamp(24px, 3.6vw, 40px);
  padding: clamp(18px, 2.6vw, 26px);
  background: rgba(6, 19, 32, 0.62);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--amber);
  clip-path: var(--cut-sm);
}

.page-contact .ct-reply h3 {
  margin: 0 0 10px;
  font-size: clamp(15px, 1.8vw, 18px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .ct-reply p {
  margin: 0 0 10px;
  max-width: 64ch;
  color: var(--cold);
  font-size: 14.5px;
  line-height: 1.82;
}

.page-contact .ct-reply p:last-child {
  margin-bottom: 0;
}

/* ---------- 页尾备案 ---------- */

.page-contact .ct-legal {
  display: grid;
  gap: 8px;
  margin-top: clamp(36px, 6vw, 72px);
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid var(--line-soft);
}

.page-contact .ct-legal__line {
  margin: 0;
  color: var(--rock);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.07em;
}

.page-contact .ct-legal__links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  color: var(--rock);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .ct-legal__links a {
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .ct-legal__links a:hover,
.page-contact .ct-legal__links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-contact .ct-contacts__row {
    grid-template-columns: minmax(120px, 168px) minmax(0, 1fr);
    align-items: baseline;
    gap: clamp(16px, 2.4vw, 28px);
  }

  .page-contact .ct-prep__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(14px, 2.2vw, 24px);
  }
}

@media (min-width: 860px) {
  .page-contact .ct-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 24px);
  }
}

@media (min-width: 940px) {
  .page-contact .ct-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
    gap: clamp(32px, 5vw, 76px);
  }

  .page-contact .ct-ways__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-contact .ct-ways__col--b {
    margin-top: clamp(34px, 6vw, 78px);
  }

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

@media (min-width: 1180px) {
  .page-contact .ct-contact-sec .ct-contacts {
    max-width: 880px;
  }

  .page-contact .ct-reply {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-way::before,
  .page-contact .ct-way__mark,
  .page-contact .ct-step::before,
  .page-contact .ct-copy,
  .page-contact .ct-hero__panel {
    transition: none;
  }
}