/* ===========================================================
   商务合作 · 页面专属样式（作用域：.page-contact）
   =========================================================== */

.page-contact {
  --pc-gap: clamp(26px, 4vw, 44px);
  --pc-pad: clamp(56px, 8vw, 96px);
  background: var(--void);
  color: var(--silver);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-contact .sec {
  position: relative;
  padding: var(--pc-pad) 0;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 clamp(52px, 7vw, 84px);
  background:
    radial-gradient(120% 92% at 86% 6%, rgba(47, 227, 206, 0.15), transparent 62%),
    linear-gradient(164deg, var(--night) 0%, var(--void) 68%, #091730 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(47, 227, 206, 0.055) 0 1px,
    transparent 1px 78px
  );
  pointer-events: none;
}

.page-contact .hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
}

.page-contact .contact-hero .kicker {
  margin: 24px 0 0;
}

.page-contact .contact-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.2vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-contact .hero-lead {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15.5px, 1.55vw, 17.5px);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-contact .hero-aside {
  align-self: end;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(20, 36, 62, 0.86), rgba(12, 24, 48, 0.86));
}

.page-contact .aside-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-contact .aside-facts {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .aside-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(34, 51, 79, 0.85);
}

.page-contact .aside-facts li:last-child {
  border-bottom: 0;
}

.page-contact .fact-k {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-contact .fact-v {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

/* ---------- 01 合作方向 ---------- */

.page-contact .dir-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: var(--pc-gap);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .dir-card {
  position: relative;
  padding: clamp(22px, 3vw, 32px);
  background: linear-gradient(180deg, rgba(20, 36, 62, 0.66), rgba(12, 24, 48, 0.9));
  transition: background var(--t-mid) var(--ease);
}

.page-contact .dir-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--t-mid) var(--ease);
}

.page-contact .dir-card:hover {
  background: linear-gradient(180deg, rgba(24, 44, 74, 0.86), rgba(14, 28, 56, 0.94));
}

.page-contact .dir-card:hover::after {
  transform: scaleY(1);
}

.page-contact .dir-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-contact .dir-body {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .dir-fit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 02 合作流程 ---------- */

.page-contact .flow-figure {
  margin: var(--pc-gap) 0 0;
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--night);
}

.page-contact .flow-cap {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-contact .flow-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 44px);
  margin-top: clamp(34px, 5vw, 52px);
}

.page-contact .acc-item {
  border: 1px solid var(--line);
  border-bottom: 0;
  background: rgba(20, 36, 62, 0.4);
  transition: background var(--t-mid) var(--ease);
}

.page-contact .acc-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .acc-item:hover {
  background: rgba(20, 36, 62, 0.66);
}

.page-contact .step-head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-contact .acc-trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  padding: 20px clamp(16px, 2.6vw, 24px);
  background: transparent;
  border: 0;
  color: var(--silver);
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.85vw, 19px);
  font-weight: 800;
  line-height: 1.42;
  letter-spacing: -0.005em;
  text-align: left;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .acc-trigger:hover {
  color: var(--cyan);
}

.page-contact .acc-trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-contact .step-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-contact .step-name {
  min-width: 0;
}

.page-contact .acc-panel {
  padding: 0 clamp(16px, 2.6vw, 24px) 22px;
}

.page-contact .step-body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .step-list {
  display: grid;
  gap: 9px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .step-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-contact .step-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  background: var(--cyan);
}

.page-contact .flow-side {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-contact .side-figure {
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
}

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

.page-contact .contact-card {
  position: relative;
  padding: clamp(24px, 3.2vw, 34px);
  background:
    radial-gradient(130% 100% at 100% 0%, rgba(47, 227, 206, 0.13), transparent 64%),
    var(--night);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  box-shadow: 0 28px 62px -40px rgba(0, 0, 0, 0.92);
}

.page-contact .card-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .card-head {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(20px, 2.4vw, 25px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-contact .card-rows {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .card-rows li {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .row-k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .row-v {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--silver);
  overflow-wrap: anywhere;
}

.page-contact .row-v--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-contact .card-note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 03 发起准备 ---------- */

.page-contact .prep {
  background:
    linear-gradient(180deg, rgba(7, 14, 28, 0) 0%, rgba(7, 14, 28, 0.72) 100%);
}

.page-contact .prep-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: var(--pc-gap);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .prep-col {
  padding: clamp(22px, 3vw, 32px);
  background: rgba(12, 24, 48, 0.72);
}

.page-contact .prep-col--accent {
  background:
    linear-gradient(180deg, rgba(27, 167, 149, 0.1), rgba(12, 24, 48, 0.86));
}

.page-contact .prep-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  line-height: 1.32;
  color: var(--silver);
}

.page-contact .prep-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: prep;
}

.page-contact .prep-list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  counter-increment: prep;
}

.page-contact .prep-list li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-contact .prep-note {
  margin: 22px 0 0;
  max-width: 78ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .prep-note a,
.page-contact .sla-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 206, 0.4);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-contact .prep-note a:hover,
.page-contact .sla-note a:hover {
  color: var(--cyan-deep);
  border-bottom-color: var(--cyan-deep);
}

/* ---------- 04 响应节奏 ---------- */

.page-contact .sla-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: var(--pc-gap) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .sla-item {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 2.8vw, 28px);
  background: rgba(20, 36, 62, 0.5);
}

.page-contact .sla-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-contact .sla-key {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .sla-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收束 ---------- */

.page-contact .signoff {
  position: relative;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(160deg, var(--night) 0%, var(--void) 74%),
    var(--void);
  overflow: hidden;
}

.page-contact .signoff::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 42%;
  background: linear-gradient(105deg, rgba(47, 227, 206, 0.09), transparent 72%);
  pointer-events: none;
}

.page-contact .signoff-inner {
  position: relative;
  display: grid;
  gap: 24px;
}

.page-contact .signoff-line {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--silver);
}

.page-contact .signoff-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .dir-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .prep-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .sla-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .hero-inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-contact .signoff-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px 40px;
  }

  .page-contact .signoff-line {
    grid-column: 1;
  }

  .page-contact .signoff-shortcuts {
    grid-column: 1;
  }

  .page-contact .signoff-actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: end;
  }
}

@media (min-width: 980px) {
  .page-contact .flow-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
    gap: 44px;
  }
}