.page-contact {
  --contact-rail-w: 356px;
  --contact-gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-contact .breadcrumb {
  margin: clamp(18px, 3vw, 32px) 0 clamp(18px, 3vw, 28px);
}

/* ============ 布局 ============ */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
}

.page-contact .contact-main {
  min-width: 0;
}

.page-contact .contact-rail {
  min-width: 0;
}

.page-contact .contact-rail__inner {
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
}

/* ============ 首屏 ============ */
.page-contact .contact-hero {
  padding-bottom: clamp(26px, 3.4vw, 40px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 18ch;
}

.page-contact .contact-lead {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.85;
  color: var(--text);
}

.page-contact .contact-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-chips__item {
  font-size: 13px;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
  background: rgba(16, 27, 58, 0.62);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.page-contact .contact-chips__item:hover {
  color: var(--white);
  border-color: rgba(57, 255, 136, 0.42);
}

.page-contact .contact-chips__item--neon {
  color: var(--neon);
  border-color: rgba(57, 255, 136, 0.4);
  background: var(--neon-dim);
}

/* ============ 章节 ============ */
.page-contact .contact-section {
  padding-top: clamp(40px, 6vw, 72px);
}

.page-contact .contact-section__lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .contact-section h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .contact-inline-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 136, 0.4);
  transition: border-color 0.25s var(--ease);
}

.page-contact .contact-inline-link:hover {
  border-bottom-color: var(--neon);
}

/* ============ 合作方向 ============ */
.page-contact .dir-list {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .dir-item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  background:
    linear-gradient(135deg, rgba(16, 27, 58, 0.88), rgba(12, 20, 48, 0.55));
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease),
    background 0.32s var(--ease);
}

.page-contact .dir-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 2px;
  border-radius: 2px;
  background: var(--neon);
  opacity: 0.75;
}

.page-contact .dir-item--orange::before {
  background: var(--orange);
}

.page-contact .dir-item--elec::before {
  background: var(--elec);
}

.page-contact .dir-item--teal::before {
  background: var(--teal);
  box-shadow: 0 0 0 1px rgba(57, 255, 136, 0.28);
}

.page-contact .dir-item:hover {
  border-color: rgba(57, 255, 136, 0.36);
  background:
    linear-gradient(135deg, rgba(22, 36, 77, 0.92), rgba(12, 20, 48, 0.68));
  transform: translateY(-2px);
}

.page-contact .dir-item__idx {
  padding-top: 5px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-contact .dir-item--orange .dir-item__idx {
  color: var(--orange);
}

.page-contact .dir-item--elec .dir-item__idx {
  color: var(--elec);
}

.page-contact .dir-item--teal .dir-item__idx {
  color: var(--mute);
}

.page-contact .dir-item__body h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  color: var(--white);
}

.page-contact .dir-item__body p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .dir-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

/* ============ 联系渠道 ============ */
.page-contact .channel-list {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .channel-item {
  display: grid;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 28px) 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .channel-item__key {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-contact .channel-item__tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--mute);
}

.page-contact .channel-item__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
}

.page-contact .channel-item__data {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--white);
  word-break: break-all;
  line-height: 1.45;
}

.page-contact .channel-item__data--neon {
  color: var(--neon);
}

.page-contact .channel-item__data--plain {
  font-family: var(--sans);
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--white);
}

.page-contact .channel-item__desc {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 合作流程 ============ */
.page-contact .flow-list {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: clamp(18px, 2.4vw, 24px) clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-left: 2px solid rgba(138, 148, 166, 0.25);
  border-radius: var(--r-m);
  background: rgba(12, 20, 48, 0.6);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease),
    transform 0.3s var(--ease);
}

.page-contact .flow-step:hover,
.page-contact .flow-step:focus-within {
  border-left-color: var(--neon);
  background: rgba(22, 36, 77, 0.72);
  transform: translateX(5px);
}

.page-contact .flow-step__num {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 3px;
}

.page-contact .flow-step__body h3 {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 18px);
  font-weight: 700;
  color: var(--white);
}

.page-contact .flow-step__body p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .contact-flow-figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-850);
}

.page-contact .contact-flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* ============ 响应与支持 ============ */
.page-contact .support-grid {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .support-card {
  padding: clamp(18px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  background:
    linear-gradient(180deg, rgba(16, 27, 58, 0.85), rgba(10, 17, 40, 0.6));
  transition: border-color 0.3s var(--ease);
}

.page-contact .support-card:hover {
  border-color: rgba(57, 255, 136, 0.34);
}

.page-contact .support-card p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ============ 常见合作问题 ============ */
.page-contact .faq-list {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: rgba(12, 20, 48, 0.55);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-contact .faq-item[open] {
  border-color: rgba(57, 255, 136, 0.34);
  background: rgba(22, 36, 77, 0.6);
}

.page-contact .faq-q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

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

.page-contact .faq-q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--neon);
}

.page-contact .faq-item[open] .faq-q::after {
  content: "–";
  color: var(--orange);
}

.page-contact .faq-a {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
}

/* ============ 收尾 ============ */
.page-contact .contact-cta {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(24px, 3.2vw, 34px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 88% 12%, var(--neon-dim), transparent 58%),
    linear-gradient(140deg, rgba(22, 36, 77, 0.9), rgba(10, 17, 40, 0.75));
}

.page-contact .contact-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--text);
}

.page-contact .contact-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ============ 侧栏联系卡 ============ */
.page-contact .contact-card {
  position: relative;
  padding: clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-l);
  background:
    linear-gradient(165deg, rgba(22, 36, 77, 0.94), rgba(12, 20, 48, 0.85));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-contact .contact-card::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--orange-dim), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-card__eyebrow {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--neon);
}

.page-contact .contact-card__title {
  margin: 8px 0 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .contact-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .contact-item {
  display: grid;
  gap: 7px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-contact .contact-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-item__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}

.page-contact .contact-item__value {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
  word-break: break-all;
}

.page-contact .contact-item__value--neon {
  color: var(--neon);
}

.page-contact .contact-item__value--plain {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.7;
}

.page-contact .contact-item__btn {
  justify-self: start;
  margin-top: 4px;
  padding: 6px 13px;
  font-size: 12px;
}

.page-contact .contact-card__status {
  display: block;
  min-height: 1.1em;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--neon);
}

/* ============ 侧栏图像 ============ */
.page-contact .contact-media {
  position: relative;
  margin: 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-850);
}

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

.page-contact .contact-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 76% 20%, var(--orange-dim), transparent 56%),
    linear-gradient(180deg, transparent 48%, rgba(10, 17, 40, 0.82));
}

.page-contact .contact-media .media__caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 1;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-contact .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .contact-chips {
    gap: 12px;
  }
}

@media (min-width: 720px) {
  .page-contact .channel-item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-layout {
    grid-template-columns: var(--contact-rail-w) minmax(0, 1fr);
    gap: var(--contact-gap);
    align-items: start;
  }

  .page-contact .contact-main {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .contact-rail {
    grid-column: 1;
    grid-row: 1;
    align-self: start;
  }

  .page-contact .contact-rail__inner {
    position: sticky;
    top: calc(var(--hdr-h, 68px) + 28px);
  }
}

@media (min-width: 1240px) {
  .page-contact .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-item,
  .page-contact .flow-step,
  .page-contact .support-card,
  .page-contact .contact-chips__item {
    transition: none;
  }

  .page-contact .dir-item:hover,
  .page-contact .flow-step:hover,
  .page-contact .flow-step:focus-within {
    transform: none;
  }
}