/* ===== 商务合作页 · page-contact ===== */

.page-contact {
  --contact-pad: clamp(56px, 9vw, 108px);
  --contact-dark: rgba(232, 234, 237, 0.75);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--ink);
  color: var(--silver);
  padding: 40px 0 clamp(52px, 8vw, 88px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: 68%;
  height: 165%;
  background: linear-gradient(180deg, rgba(200, 164, 106, 0.16), rgba(200, 164, 106, 0) 62%);
  transform: skewX(-8deg);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero > .container {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(232, 234, 237, 0.55);
  margin: 0 0 30px;
}

.page-contact .contact-hero .breadcrumb a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .contact-hero .breadcrumb a:hover {
  color: var(--cyan);
}

.page-contact .hero-grid {
  display: grid;
  gap: 32px;
}

.page-contact .contact-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 5vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 12px 0 18px;
  color: var(--silver);
  max-width: 15em;
}

.page-contact .hero-lead {
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.9;
  color: var(--contact-dark);
  max-width: 34em;
  margin: 0 0 28px;
}

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

.page-contact .hero-media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline-light);
  aspect-ratio: 3 / 2;
  margin: 0;
}

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

@media (min-width: 860px) {
  .page-contact .hero-grid {
    grid-template-columns: 1.15fr 1fr;
    align-items: center;
    gap: 52px;
  }
}

/* ---------- 合作方向 ---------- */
.page-contact .directions {
  background-color: var(--paper);
  color: var(--ink);
  padding: 0 0 var(--contact-pad);
}

.page-contact .directions-band {
  display: block;
  width: 100%;
  height: clamp(120px, 22vw, 236px);
  object-fit: cover;
  filter: saturate(0.92);
  margin-bottom: clamp(40px, 6vw, 72px);
}

.page-contact .section-head {
  max-width: 44em;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.page-contact .section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  line-height: 1.26;
  letter-spacing: -0.01em;
  margin: 8px 0 14px;
}

.page-contact .section-lead {
  color: var(--muted);
  line-height: 1.9;
  font-size: 1rem;
  margin: 0;
}

.page-contact .directions .eyebrow,
.page-contact .reach .eyebrow,
.page-contact .contact-related .eyebrow {
  color: var(--cyan-deep);
}

.page-contact .direction-grid {
  display: grid;
  gap: 16px;
}

.page-contact .dir-card {
  background-color: var(--graphite);
  color: var(--silver);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 24px 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color var(--t-mid) var(--ease), border-radius var(--t-mid) var(--ease);
}

.page-contact .dir-card:hover {
  border-color: var(--cyan);
  border-radius: var(--r-md);
}

.page-contact .dir-card--featured {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(200, 164, 106, 0.12);
}

.page-contact .dir-card--featured:hover {
  border-color: var(--cyan);
}

.page-contact .dir-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-contact .dir-card h3 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--silver);
}

.page-contact .dir-for {
  font-size: 0.8125rem;
  color: rgba(232, 234, 237, 0.6);
  margin: 0;
  letter-spacing: 0.01em;
}

.page-contact .dir-what {
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(232, 234, 237, 0.86);
  margin: 0 0 6px;
  flex: 1;
}

.page-contact .dir-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  color: rgba(232, 234, 237, 0.48);
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--rule);
  transition: color var(--t-mid) var(--ease);
}

.page-contact .dir-card:hover .dir-hint {
  color: var(--cyan);
}

@media (min-width: 780px) {
  .page-contact .direction-grid {
    grid-template-columns: 1.25fr 1fr 0.95fr;
    align-items: stretch;
  }
}

/* ---------- 回复时效 + 流程 ---------- */
.page-contact .contact-process {
  background-color: var(--ink);
  color: var(--silver);
  padding: var(--contact-pad) 0;
}

.page-contact .process-layout {
  display: grid;
  gap: 44px;
}

.page-contact .process-main h2,
.page-contact .rail-h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  line-height: 1.26;
  letter-spacing: -0.01em;
  margin: 8px 0 16px;
  color: var(--silver);
}

.page-contact .process-main > p {
  line-height: 1.9;
  color: var(--contact-dark);
  max-width: 34em;
  margin: 0 0 22px;
}

.page-contact .reply-panel {
  display: grid;
  gap: 14px;
  padding: 22px 4px;
  margin: 0 0 22px;
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--hairline-light);
}

.page-contact .reply-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-contact .reply-k {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-contact .reply-v {
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 600;
  color: var(--silver);
  letter-spacing: -0.01em;
}

.page-contact .reply-v b {
  color: var(--cyan);
  font-weight: 700;
}

.page-contact .reply-tip-label {
  color: var(--silver);
  font-size: 0.95rem;
  margin: 0 0 12px;
}

.page-contact .reply-tips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 34em;
}

.page-contact .reply-tips li {
  position: relative;
  padding-left: 22px;
  line-height: 1.8;
  font-size: 0.95rem;
  color: var(--contact-dark);
}

.page-contact .reply-tips li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.78em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background-color: var(--cyan);
}

.page-contact .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-contact .steps::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background-color: var(--hairline-light);
}

.page-contact .step {
  position: relative;
}

.page-contact .step details {
  padding: 4px 0;
}

.page-contact .step summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
  cursor: pointer;
  list-style: none;
  color: var(--silver);
}

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

.page-contact .step-num {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  background-color: var(--ink);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  position: relative;
  z-index: 1;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-contact .step[open] .step-num,
.page-contact .step summary:hover .step-num {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-contact .step-title {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.page-contact .step-body {
  padding: 0 0 14px 44px;
}

.page-contact .step-body p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
  color: rgba(232, 234, 237, 0.66);
}

@media (min-width: 900px) {
  .page-contact .process-layout {
    grid-template-columns: 1.3fr 1fr;
    gap: 68px;
    align-items: start;
  }
  .page-contact .reply-panel {
    grid-template-columns: 1fr 1fr;
    column-gap: 28px;
  }
}

/* ---------- 大留白联系区 ---------- */
.page-contact .reach {
  background-color: var(--paper);
  color: var(--ink);
  padding: clamp(72px, 12vw, 152px) 0;
}

.page-contact .reach-card {
  text-align: center;
}

.page-contact .reach-mark {
  display: block;
  width: 44px;
  height: 44px;
  margin: 0 auto 26px;
  border: 1.5px solid var(--gold);
  border-radius: 12px;
  position: relative;
}

.page-contact .reach-mark::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 4px;
  background-color: var(--cyan);
  opacity: 0.85;
}

.page-contact .reach h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 10px 0 16px;
}

.page-contact .reach-lead {
  color: var(--muted);
  max-width: 30em;
  margin: 0 auto clamp(38px, 6vw, 56px);
  line-height: 1.9;
}

.page-contact .reach-rows {
  display: grid;
  gap: 30px;
  margin: 0 0 40px;
}

.page-contact .reach-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.page-contact .reach-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-contact .reach-value {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.15rem, 3.6vw, 1.9rem);
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--ink);
  word-break: break-word;
  max-width: 100%;
}

.page-contact .reach-value--sm {
  font-size: clamp(0.95rem, 2.3vw, 1.12rem);
  font-weight: 500;
  color: var(--muted);
  line-height: 1.7;
}

.page-contact .reach-note {
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 34em;
  margin: 0 auto 18px;
}

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

.page-contact .reach-legal {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(92, 99, 107, 0.8);
  margin: 0;
}

/* ---------- 常见问题 ---------- */
.page-contact .faq {
  background-color: var(--graphite);
  color: var(--silver);
  padding: var(--contact-pad) 0;
}

.page-contact .section-head--ink h2 {
  color: var(--silver);
}

.page-contact .section-head--ink .eyebrow {
  color: var(--gold);
}

.page-contact .faq-list {
  display: grid;
  gap: 12px;
  max-width: 54em;
}

.page-contact .faq-item {
  background-color: var(--slate);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--t-fast) var(--ease);
}

.page-contact .faq-item[open] {
  border-color: var(--gold);
}

.page-contact .faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 17px 20px;
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--silver);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

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

.page-contact .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--cyan);
  transition: transform var(--t-fast) var(--ease);
}

.page-contact .faq-item[open] summary::after {
  transform: rotate(45deg);
}

.page-contact .faq-body {
  padding: 0 20px 20px;
}

.page-contact .faq-body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: rgba(232, 234, 237, 0.78);
}

/* ---------- 延伸阅读 ---------- */
.page-contact .contact-related {
  background-color: var(--paper);
  color: var(--ink);
  padding: clamp(44px, 6vw, 68px) 0;
}

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

.page-contact .related-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 15px 2px;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .related-list a:hover,
.page-contact .related-list a:focus-visible {
  color: var(--cyan-deep);
  border-color: var(--cyan-deep);
}

.page-contact .related-arrow {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold);
}

/* ---------- 键盘可达 ---------- */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}