.page-contact {
  --contact-rule: rgba(201, 162, 39, .26);
  --contact-card-bg: rgba(20, 50, 41, .68);
}

.page-contact img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(26px, 6vw, 58px) 0 clamp(26px, 5vw, 48px);
  border-bottom: 1px solid var(--contact-rule);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(79, 227, 208, .07), transparent 58%),
    linear-gradient(180deg, rgba(15, 74, 61, .34), rgba(6, 42, 36, 0) 92%);
}

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

.page-contact .contact-hero h1 {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-size: clamp(28px, 6.4vw, 52px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: .005em;
  color: var(--c-ink);
  max-width: 22ch;
}

.page-contact .contact-hero .lede {
  margin: 0;
  max-width: 60ch;
}

.page-contact .contact-quick {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin: 26px 0 0;
  padding: 0;
}

.page-contact .contact-quick li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-silver);
  background: rgba(6, 42, 36, .58);
  border: 1px solid var(--line-hair);
  border-radius: 999px;
  padding: 7px 13px;
}

/* ---------- 章节骨架 ---------- */
.page-contact .contact-section {
  padding: clamp(34px, 7vw, 70px) 0;
}

.page-contact .contact-section + .contact-section {
  border-top: 1px solid var(--line-hair);
}

.page-contact .contact-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin: 0 0 clamp(20px, 3.4vw, 34px);
}

.page-contact .contact-head .chapter-num {
  font-family: var(--font-head);
  font-size: clamp(44px, 11vw, 96px);
  font-weight: 900;
  line-height: .92;
  letter-spacing: -.03em;
  color: var(--c-gold);
  opacity: .36;
}

.page-contact .contact-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(23px, 4.4vw, 34px);
  font-weight: 900;
  line-height: 1.25;
  color: var(--c-ink);
}

.page-contact .contact-head .lede {
  margin: 0;
  max-width: 62ch;
}

.page-contact .filter-bar {
  margin-bottom: 20px;
}

/* ---------- 三种对接方式 ---------- */
.page-contact .channel-grid {
  display: grid;
  gap: 16px;
}

.page-contact .channel-card {
  position: relative;
  padding: 24px 20px 22px;
}

.page-contact .channel-card__bar {
  display: block;
  width: 62px;
  height: 3px;
  margin-bottom: 16px;
  background: linear-gradient(90deg, var(--c-gold), rgba(201, 162, 39, 0));
}

.page-contact .channel-card--data .channel-card__bar {
  background: linear-gradient(90deg, var(--c-cyan), rgba(79, 227, 208, 0));
}

.page-contact .channel-card--media .channel-card__bar {
  background: linear-gradient(90deg, var(--c-amber), rgba(232, 180, 74, 0));
}

.page-contact .channel-card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--c-ink);
}

.page-contact .channel-card__desc {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-silver);
}

.page-contact .channel-card__meta {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-hair);
}

.page-contact .channel-card__meta dt {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--c-gold-lit);
}

.page-contact .channel-card__meta dd {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-contact .channel-card__meta dd:last-child {
  margin-bottom: 0;
}

.page-contact .contact-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

/* ---------- 联系信息 ---------- */
.page-contact .info-grid {
  display: grid;
  gap: 14px;
}

.page-contact .info-cell {
  position: relative;
  padding: 20px 18px 18px 22px;
  background: var(--contact-card-bg);
  border: 1px solid var(--line-hair);
}

.page-contact .info-cell::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--c-gold);
}

.page-contact .info-cell--tel::before {
  background: var(--c-cyan);
}

.page-contact .info-cell--addr::before {
  background: var(--c-amber);
}

.page-contact .info-cell--icp::before {
  background: var(--c-silver);
}

.page-contact .info-cell__key {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--c-silver);
  opacity: .82;
}

.page-contact .info-cell__value {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--c-ink);
  overflow-wrap: anywhere;
}

.page-contact .info-cell__value.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .02em;
}

.page-contact .info-cell__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-silver);
}

/* ---------- 邮件五件事 ---------- */
.page-contact .letter {
  border-top: 1px solid var(--contact-rule);
}

.page-contact .letter__item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-hair);
}

.page-contact .letter__num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--c-gold-lit);
  padding-top: 4px;
}

.page-contact .letter__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--c-ink);
}

.page-contact .letter__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-silver);
}

.page-contact .letter__foot {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .03em;
  line-height: 1.8;
  color: var(--c-cyan);
}

/* ---------- 合作流程 ---------- */
.page-contact .flow {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
}

.page-contact .flow__step {
  position: relative;
  padding: 22px 18px 18px;
  background: var(--contact-card-bg);
  border: 1px solid var(--line-hair);
}

.page-contact .flow__step::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), rgba(201, 162, 39, .12));
}

.page-contact .flow__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 26px;
  letter-spacing: .02em;
  color: var(--c-gold-lit);
}

.page-contact .flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--c-ink);
}

.page-contact .flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-silver);
}

.page-contact .flow__step p.flow__meta {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-cyan);
}

/* ---------- 地址与来访 ---------- */
.page-contact .address-band {
  display: grid;
  gap: 22px;
}

.page-contact .address-band__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-silver);
}

.page-contact .address-band__text .address-band__line {
  margin-bottom: 18px;
  padding-left: 16px;
  border-left: 3px solid var(--c-gold);
  font-family: var(--font-head);
  font-size: clamp(17px, 2.6vw, 21px);
  font-weight: 800;
  line-height: 1.6;
  color: var(--c-ink);
}

.page-contact .address-band__text .address-band__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
}

.page-contact .address-band__figure {
  margin: 0;
}

/* ---------- 结尾行动 ---------- */
.page-contact .contact-close {
  padding: clamp(34px, 7vw, 64px) 0;
  border-top: 1px solid var(--contact-rule);
  background: linear-gradient(180deg, rgba(15, 74, 61, .32), rgba(6, 42, 36, .04));
}

.page-contact .contact-close__inner {
  max-width: 720px;
}

.page-contact .contact-close h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 900;
  line-height: 1.3;
  color: var(--c-ink);
}

.page-contact .contact-close p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--c-silver);
  overflow-wrap: anywhere;
}

.page-contact .contact-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 780px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
}

@media (min-width: 840px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-contact .contact-head {
    grid-template-columns: minmax(110px, 170px) 1fr;
    gap: 0 34px;
    align-items: start;
  }

  .page-contact .letter__item {
    grid-template-columns: 64px 1fr;
    gap: 16px;
    padding: 22px 0;
  }
}

@media (min-width: 900px) {
  .page-contact .address-band {
    grid-template-columns: 1fr 1fr;
    gap: 34px;
    align-items: start;
  }
}

@media (min-width: 1020px) {
  .page-contact .info-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}