.page-contact {
  --pc-gap: clamp(1rem, 2.2vw, 1.75rem);
  --pc-radius: 18px;
  --pc-card-pad: clamp(1.25rem, 3vw, 2.25rem);
  padding-block: clamp(1rem, 2.5vw, 1.75rem) clamp(3rem, 6vw, 5rem);
  color: var(--fog);
  overflow-x: clip;
}

.page-contact .breadcrumb {
  margin-bottom: clamp(1rem, 2.5vw, 1.75rem);
}

/* ---------- Hero ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(.75rem, 2.5vw, 1.5rem) clamp(2rem, 4vw, 3rem);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -6% -40% auto 42%;
  height: 118%;
  background: linear-gradient(155deg, var(--ink-850) 0%, rgba(10, 26, 46, 0) 74%);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0 76%);
  z-index: -1;
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-contact .contact-hero .eyebrow {
  margin: 0 0 .6rem;
}

.page-contact .contact-hero h1 {
  font-family: var(--font-sans);
  font-size: clamp(1.85rem, 5vw, 3.1rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--fog);
  margin: 0 0 1rem;
  max-width: 24ch;
}

.page-contact .contact-hero .lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(1rem, 1.7vw, 1.08rem);
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.5rem;
}

.page-contact .hero-meta {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .55rem;
  font-size: .9rem;
  color: var(--slate);
}

.page-contact .hero-meta li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .45rem;
}

.page-contact .mono {
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-contact .contact-hero__visual {
  margin: 0;
  position: relative;
}

.page-contact .contact-hero__visual .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  overflow: hidden;
  background: var(--ink-850);
  box-shadow: 0 34px 70px -46px rgba(0, 0, 0, .95);
}

.page-contact .contact-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .hero-caption {
  margin-top: .75rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--slate);
}

/* ---------- 章节通用 ---------- */
.page-contact .page-block {
  padding-block: clamp(1.75rem, 4vw, 3rem);
  border-top: 1px solid rgba(39, 65, 95, .6);
}

.page-contact .block-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(.7rem, 2vw, 1.4rem);
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .chapter-num {
  flex: 0 0 auto;
  line-height: 1;
}

.page-contact .block-head-text h2 {
  font-family: var(--font-sans);
  font-size: clamp(1.45rem, 3.2vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--fog);
  margin: 0 0 .45rem;
}

.page-contact .block-lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(.94rem, 1.6vw, 1.02rem);
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 01 联系渠道 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .contact-sheet {
  position: relative;
  background: var(--paper);
  color: var(--ink-950);
  border-radius: var(--pc-radius);
  padding: var(--pc-card-pad);
  border: 1px solid rgba(18, 43, 71, .18);
  box-shadow: 0 30px 70px -42px rgba(0, 0, 0, .95);
  overflow: hidden;
}

.page-contact .contact-sheet::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 5px;
  background: linear-gradient(90deg, var(--gold), var(--cyan) 58%, rgba(61, 245, 228, 0) 100%);
}

.page-contact .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1rem;
  padding-block: clamp(.85rem, 2vw, 1.1rem);
  border-bottom: 1px solid rgba(18, 43, 71, .16);
}

.page-contact .contact-row:first-of-type {
  padding-top: .35rem;
}

.page-contact .contact-row:last-of-type {
  border-bottom: 0;
}

.page-contact .contact-row-main {
  display: flex;
  flex-direction: column;
  gap: .18rem;
  min-width: 0;
}

.page-contact .contact-label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--ink-700);
}

.page-contact .contact-value {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.4vw, 1.4rem);
  font-weight: 700;
  line-height: 1.32;
  color: var(--ink-950);
  text-decoration: none;
  word-break: break-word;
}

.page-contact a.contact-value:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--ink-700);
}

.page-contact .copy-btn {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  padding: .42rem .78rem;
  border-radius: 999px;
  border: 1px solid var(--ink-700);
  background: transparent;
  color: var(--ink-700);
  cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible,
.page-contact .copy-btn[data-copied] {
  background: var(--ink-950);
  border-color: var(--ink-950);
  color: var(--paper);
}

.page-contact .contact-sheet__note {
  margin: 1rem 0 0;
  padding-top: .9rem;
  border-top: 1px dashed rgba(18, 43, 71, .3);
  font-size: .85rem;
  line-height: 1.68;
  color: var(--ink-700);
}

.page-contact .self-service {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--ink-850), var(--ink-950));
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  padding: var(--pc-card-pad);
}

.page-contact .self-service::after {
  content: "";
  position: absolute;
  right: -32%;
  top: -42%;
  width: 72%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 245, 228, .16), rgba(61, 245, 228, 0) 68%);
  pointer-events: none;
}

.page-contact .self-service .tag {
  margin: 0 0 .75rem;
}

.page-contact .self-service h3 {
  position: relative;
  margin: 0 0 .6rem;
  font-family: var(--font-sans);
  font-size: clamp(1.1rem, 2.2vw, 1.32rem);
  font-weight: 800;
  line-height: 1.36;
  color: var(--fog);
}

.page-contact .self-service__intro {
  position: relative;
  margin: 0;
  font-size: .93rem;
  line-height: 1.74;
  color: var(--slate);
}

.page-contact .self-list {
  position: relative;
  list-style: none;
  margin: 1.1rem 0 1.35rem;
  padding: 0;
  display: grid;
  gap: .6rem;
}

.page-contact .self-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--fog);
}

.page-contact .self-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: .65rem;
  height: 2px;
  background: var(--cyan);
}

.page-contact .self-service .btn {
  position: relative;
}

/* ---------- 02 合作方向 ---------- */
.page-contact .coop-layout {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .coop-list {
  display: grid;
  gap: .75rem;
}

.page-contact .coop-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink-850);
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-contact .coop-item:hover {
  border-color: rgba(61, 245, 228, .42);
}

.page-contact .coop-item[open] {
  border-color: rgba(61, 245, 228, .6);
  box-shadow: inset 0 0 0 1px rgba(61, 245, 228, .18);
}

.page-contact .coop-summary {
  display: flex;
  align-items: center;
  gap: .85rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .coop-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .76rem;
  font-weight: 700;
  color: var(--gold);
  border: 1px solid rgba(255, 194, 75, .45);
  border-radius: var(--r-sm);
  padding: .12rem .42rem;
}

.page-contact .coop-name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--fog);
}

.page-contact .coop-chevron {
  flex: 0 0 auto;
  width: .55rem;
  height: .55rem;
  margin-right: .2rem;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
  transition: transform .25s var(--ease);
}

.page-contact .coop-item[open] .coop-chevron {
  transform: rotate(45deg);
}

.page-contact .coop-body {
  padding: 0 1.1rem 1.15rem;
}

.page-contact .coop-body p {
  margin: 0 0 .65rem;
  font-size: .94rem;
  line-height: 1.74;
  color: var(--slate);
}

.page-contact .coop-body .coop-note {
  margin-bottom: 0;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--cyan);
}

.page-contact .coop-foot {
  margin: .35rem 0 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--slate);
}

.page-contact .coop-foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .coop-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  overflow: hidden;
  background: var(--ink-850);
}

.page-contact .coop-figure .media-frame {
  border: 0;
  border-radius: 0;
}

.page-contact .coop-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .coop-figure figcaption {
  padding: .85rem 1.05rem;
  border-top: 1px solid var(--line);
  font-size: .82rem;
  line-height: 1.66;
  color: var(--slate);
}

/* ---------- 03 支持流程 ---------- */
.page-contact .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.page-contact .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .9rem;
  padding: 1rem 1.1rem;
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-contact .flow-step:hover {
  border-color: rgba(61, 245, 228, .45);
}

.page-contact .flow-num {
  display: grid;
  place-items: center;
  width: 2.05rem;
  height: 2.05rem;
  border-radius: 999px;
  background: var(--gold);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 700;
}

.page-contact .flow-body {
  min-width: 0;
}

.page-contact .flow-body h3 {
  margin: 0 0 .35rem;
  font-family: var(--font-sans);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--fog);
}

.page-contact .flow-body p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.74;
  color: var(--slate);
}

/* ---------- 04 响应说明 ---------- */
.page-contact .note-grid {
  display: grid;
  gap: var(--pc-gap);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 228px), 1fr));
}

.page-contact .note-card {
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-md);
  padding: 1.05rem 1.15rem;
}

.page-contact .note-card:nth-child(2) {
  border-left-color: var(--gold);
}

.page-contact .note-card:nth-child(3) {
  border-left-color: var(--coral);
}

.page-contact .note-card:nth-child(4) {
  border-left-color: var(--mint);
}

.page-contact .note-label {
  display: block;
  margin-bottom: .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-contact .note-card p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--slate);
}

.page-contact .note-card a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .flow-step:nth-child(even) {
    margin-left: 2.5rem;
  }

  .page-contact .flow-list {
    gap: 1rem;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }

  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .coop-layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-hero {
    padding-block: clamp(1.5rem, 3vw, 2.5rem) clamp(2.5rem, 5vw, 4rem);
  }

  .page-contact .flow-step:nth-child(even) {
    margin-left: 4.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-item,
  .page-contact .coop-chevron,
  .page-contact .flow-step,
  .page-contact .copy-btn {
    transition: none;
  }
}