/* ===== 商务合作页 ===== */
.page-contact {
  --co-gap: clamp(1rem, 2.6vw, 1.75rem);
  --co-pad: clamp(1.15rem, 3vw, 1.9rem);
  display: block;
  overflow-x: hidden;
}

.page-contact .co-hero {
  position: relative;
  padding: clamp(5.5rem, 12vw, 9rem) 0 clamp(2.5rem, 6vw, 4rem);
  isolation: isolate;
  overflow: hidden;
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(43, 55, 102, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 55, 102, 0.55) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 72% 8%, #000 0%, transparent 74%);
  mask-image: radial-gradient(ellipse 90% 70% at 72% 8%, #000 0%, transparent 74%);
  opacity: 0.55;
  z-index: -1;
  pointer-events: none;
}

.page-contact .co-hero__glow {
  position: absolute;
  top: -32%;
  right: -14%;
  width: min(780px, 96vw);
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 34% 34%, rgba(122, 77, 255, 0.5), transparent 62%),
    radial-gradient(circle at 68% 70%, rgba(56, 232, 200, 0.24), transparent 60%);
  filter: blur(12px);
  z-index: -2;
  pointer-events: none;
  animation: co-drift 20s ease-in-out infinite alternate;
}

@keyframes co-drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(-3%, 4%, 0) scale(1.06); }
}

.page-contact .co-hero__shell {
  position: relative;
  z-index: 1;
}

.page-contact .co-hero .eyebrow {
  margin: clamp(1.4rem, 3vw, 2.2rem) 0 0.85rem;
}

.page-contact h1 {
  max-width: 22ch;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 5.6vw, 4.1rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--porcelain);
}

.page-contact .co-hero__lede {
  max-width: 60ch;
  margin: clamp(1.1rem, 2.5vw, 1.6rem) 0 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.5vw, 1.08rem);
  line-height: 1.85;
  color: var(--mist);
}

/* —— 首屏四向选择块 —— */
.page-contact .co-picker {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .co-picker__item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  height: 100%;
  padding: 1.3rem 1.2rem 1.45rem;
  background: var(--ink-1);
  color: var(--porcelain);
  text-decoration: none;
  transition: background-color 0.28s ease, box-shadow 0.28s ease;
}

.page-contact .co-picker__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-contact .co-picker__name {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1.06rem;
  letter-spacing: 0.02em;
}

.page-contact .co-picker__desc {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-contact .co-picker__go {
  margin-top: auto;
  padding-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--mint);
  transition: transform 0.28s ease;
}

@media (hover: hover) {
  .page-contact .co-picker__item:hover {
    background: var(--ink-2);
    box-shadow: inset 0 0 0 1px var(--violet), inset 0 -34px 70px -46px rgba(122, 77, 255, 0.95);
  }
  .page-contact .co-picker__item:hover .co-picker__go {
    transform: translateY(3px);
  }
}

@media (min-width: 700px) {
  .page-contact .co-picker { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1080px) {
  .page-contact .co-picker { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* —— 01 合作方向 —— */
.page-contact .co-directions__grid {
  display: grid;
  gap: var(--co-gap);
}

@media (min-width: 900px) {
  .page-contact .co-directions__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
  .page-contact .co-directions__grid > :nth-child(2),
  .page-contact .co-directions__grid > :nth-child(3) {
    margin-top: clamp(1.2rem, 3vw, 2.6rem);
  }
}

.page-contact .co-dir {
  position: relative;
  padding: var(--co-pad);
  background: linear-gradient(158deg, rgba(14, 23, 48, 0.96) 0%, rgba(6, 10, 24, 0.98) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  scroll-margin-top: 7rem;
  transition: border-color 0.28s ease, transform 0.28s ease, box-shadow 0.28s ease;
}

@media (hover: hover) {
  .page-contact .co-dir:hover {
    border-color: var(--violet);
    transform: translateY(-2px);
    box-shadow: 0 20px 44px -30px rgba(122, 77, 255, 0.9);
  }
}

.page-contact .co-dir:target {
  border-color: var(--lime);
  box-shadow: 0 0 0 1px rgba(182, 255, 60, 0.35), 0 20px 48px -32px rgba(182, 255, 60, 0.7);
}

.page-contact .co-dir__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.page-contact .co-dir__num {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .co-dir__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  line-height: 1.5;
  color: var(--porcelain);
}

.page-contact .co-dir__body {
  margin: 0 0 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .co-dir__fit {
  margin: 0 0 1rem;
  padding: 0.7rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--porcelain);
  background: rgba(58, 30, 115, 0.34);
  border-left: 2px solid var(--violet);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-contact .co-dir__fit strong {
  color: var(--mint);
  font-weight: 600;
}

.page-contact .co-dir__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-contact .co-dir__list li {
  position: relative;
  padding-left: 1.15rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .co-dir__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 1px;
  background: var(--lime);
}

/* —— 02 受理流程 —— */
.page-contact .co-steps {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .co-step {
  position: relative;
  padding: 1.5rem 0 1.6rem 1.15rem;
  border-left: 1px solid var(--line);
}

.page-contact .co-step:last-child {
  border-bottom: none;
}

.page-contact .co-step__num {
  display: inline-block;
  margin-bottom: 0.55rem;
  padding: 0.12rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--lime);
  background: rgba(182, 255, 60, 0.09);
  border: 1px solid rgba(182, 255, 60, 0.28);
  border-radius: var(--radius-pill);
}

.page-contact .co-step__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--porcelain);
}

.page-contact .co-step__body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .co-step__time {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--orange);
  transition: opacity 0.24s ease, transform 0.24s ease;
}

@media (min-width: 960px) {
  .page-contact .co-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding-top: 2.6rem;
  }

  .page-contact .co-steps::before {
    content: "";
    position: absolute;
    top: 1.15rem;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--violet) 0%, var(--mint) 55%, var(--lime) 100%);
    opacity: 0.5;
  }

  .page-contact .co-step {
    padding: 1.9rem 1.5rem 0.5rem 0;
    border-left: none;
  }

  .page-contact .co-step + .co-step {
    padding-left: 1.5rem;
  }

  .page-contact .co-step__num {
    position: absolute;
    top: -2.72rem;
    left: 0;
    display: inline-flex;
    align-items: center;
    height: 2.3rem;
    margin-bottom: 0;
    padding: 0 0.7rem;
    background: var(--ink-0);
    border-color: var(--line);
    color: var(--mist);
  }

  .page-contact .co-step + .co-step .co-step__num {
    left: 1.5rem;
  }
}

@media (hover: hover) and (min-width: 960px) {
  .page-contact .co-step__time {
    opacity: 0.62;
  }
  .page-contact .co-step:hover .co-step__time {
    opacity: 1;
    transform: translateY(-1px);
  }
}

.page-contact .co-flow__figure {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
}

/* —— 03 对接资料 —— */
.page-contact .co-docs__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

@media (min-width: 1024px) {
  .page-contact .co-docs__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
}

.page-contact .co-docs__hint {
  margin: 1.1rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-contact .co-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-contact .co-check {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.05rem 1.15rem;
  background: var(--ink-1);
  transition: background-color 0.24s ease;
}

@media (hover: hover) {
  .page-contact .co-check:hover {
    background: var(--ink-2);
  }
}

.page-contact .co-check input {
  -webkit-appearance: none;
  appearance: none;
  flex: 0 0 auto;
  width: 1.15rem;
  height: 1.15rem;
  margin: 0.18rem 0 0;
  border: 1px solid var(--line);
  border-radius: 5px;
  background-color: var(--ink-0);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 0.78rem 0.78rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-contact .co-check input:checked {
  border-color: var(--lime);
  background-color: rgba(182, 255, 60, 0.16);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.4 6.2 4.9 8.7 9.6 3.5' fill='none' stroke='%23B6FF3C' stroke-width='1.9' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.page-contact .co-check input:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

.page-contact .co-check label {
  display: block;
  cursor: pointer;
}

.page-contact .co-check__title {
  display: block;
  margin-bottom: 0.28rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--porcelain);
}

.page-contact .co-check__desc {
  display: block;
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.68;
  color: var(--mist);
}

/* —— 04 区域服务 —— */
.page-contact .co-region__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 1024px) {
  .page-contact .co-region__grid {
    grid-template-columns: 7fr 4fr;
  }
}

.page-contact .co-region__text {
  margin: 0 0 1rem;
  max-width: 62ch;
  font-family: var(--font-body);
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .co-region__facts {
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 640px) {
  .page-contact .co-region__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .co-region__fact {
  padding: 1.05rem 1.15rem;
  background: var(--ink-1);
}

.page-contact .co-region__fact dt {
  margin-bottom: 0.4rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-contact .co-region__fact dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--porcelain);
}

.page-contact .co-num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.35rem;
  color: var(--lime);
}

.page-contact .co-region__figure {
  margin: 0;
}

/* —— 05 对接窗口 —— */
.page-contact .co-contact {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 154, 60, 0.18), transparent 46%),
    linear-gradient(152deg, rgba(58, 30, 115, 0.55) 0%, rgba(14, 23, 48, 0.9) 46%, rgba(6, 10, 24, 0.98) 100%);
}

.page-contact .co-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(43, 55, 102, 0.75);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-contact .co-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .co-channel {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.45rem 0.85rem;
  padding: 1.15rem 1.25rem;
  background: rgba(6, 10, 24, 0.82);
}

.page-contact .co-channel__key {
  flex: 0 0 100%;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-contact .co-channel__key::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 10px rgba(255, 154, 60, 0.9);
}

.page-contact .co-channel__value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  line-height: 1.5;
  color: var(--porcelain);
  word-break: break-word;
}

.page-contact .co-channel__value--wide {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .co-channel__copy {
  flex: 0 0 auto;
}

.page-contact .co-contact__tip {
  margin: 1.3rem 0 0;
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

/* —— 06 常见合作问题 —— */
.page-contact .co-qa-list {
  display: grid;
  gap: 0.85rem;
}

@media (min-width: 1000px) {
  .page-contact .co-qa-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

.page-contact .co-qa {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 23, 48, 0.7);
  overflow: hidden;
}

.page-contact .co-qa[open] {
  border-color: rgba(122, 77, 255, 0.75);
}

.page-contact .co-qa__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 1.15rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.97rem;
  line-height: 1.6;
  color: var(--porcelain);
  cursor: pointer;
  list-style: none;
}

.page-contact .co-qa__q::-webkit-details-marker {
  display: none;
}

.page-contact .co-qa__q::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--mint);
  transition: transform 0.24s ease;
}

.page-contact .co-qa[open] .co-qa__q::after {
  content: "−";
  color: var(--lime);
}

.page-contact .co-qa__q:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -3px;
}

.page-contact .co-qa__a {
  padding: 0 1.15rem 1.2rem;
}

.page-contact .co-qa__a p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .co-qa__a a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 232, 200, 0.4);
  transition: border-color 0.22s ease, color 0.22s ease;
}

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

/* —— 收尾间距 —— */
.page-contact .co-qa-block {
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-hero__glow {
    animation: none;
  }
  .page-contact .co-picker__item,
  .page-contact .co-dir,
  .page-contact .co-step__time,
  .page-contact .co-qa__q::after {
    transition: none;
  }
}
</main>