.page-contact {
  --c-line: rgba(168, 182, 204, .2);
  --c-line-strong: rgba(168, 182, 204, .34);
  --c-panel: rgba(18, 32, 58, .72);
  background: var(--ink-900);
  color: var(--text-dark);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-contact__crumbs {
  padding-top: calc(var(--header-h) + 22px);
}

.page-contact .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .04em;
}

.page-contact .breadcrumbs__current {
  color: var(--silver);
}

.page-contact .breadcrumbs__current::before {
  content: "/";
  margin-right: 10px;
  color: var(--hairline);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(34px, 5vw, 62px) 0 clamp(48px, 7vw, 92px);
  background:
    linear-gradient(var(--tilt), rgba(255, 106, 43, .07) 0 20%, transparent 20%),
    radial-gradient(120% 80% at 90% 0%, rgba(37, 230, 200, .13), transparent 62%),
    radial-gradient(90% 70% at 2% 100%, rgba(255, 62, 134, .1), transparent 64%),
    var(--ink-900);
  overflow: hidden;
}

.page-contact .contact-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7vw, 72px);
  line-height: 1.03;
  letter-spacing: -.02em;
  color: #FFFFFF;
}

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

.page-contact .quick-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--c-line);
}

.page-contact .quick-fact {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
}

.page-contact .quick-fact__k {
  color: var(--silver);
  letter-spacing: .08em;
}

.page-contact .quick-fact__v {
  color: var(--cyan);
  word-break: break-all;
}

/* 联系卡片 */
.page-contact .contact-card {
  display: grid;
  grid-template-columns: 1fr;
  background: linear-gradient(180deg, rgba(18, 32, 58, .96), rgba(10, 17, 34, .96));
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--orange);
}

.page-contact .contact-card__rail {
  padding: 22px 20px;
  border-bottom: 1px solid var(--c-line);
  background: rgba(255, 255, 255, .02);
}

.page-contact .contact-card__rail .annotation {
  margin: 0;
  color: var(--silver);
  font-size: 12px;
  letter-spacing: .22em;
}

.page-contact .segmented--rail {
  display: grid;
  gap: 6px;
  margin-top: 16px;
}

.page-contact .segmented--rail .segmented__btn {
  width: 100%;
  padding: 11px 14px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--silver);
  background: rgba(255, 255, 255, .04);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .segmented--rail .segmented__btn:hover {
  color: #FFFFFF;
  border-color: var(--c-line-strong);
}

.page-contact .segmented--rail .segmented__btn.is-active,
.page-contact .segmented--rail .segmented__btn[aria-selected="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: #17120F;
}

.page-contact .contact-panel {
  padding: clamp(22px, 3vw, 34px);
}

.page-contact .contact-panel__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--silver);
}

.page-contact .contact-panel__value {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 22px);
  font-weight: 600;
  line-height: 1.35;
  color: var(--cyan);
  word-break: break-all;
  user-select: all;
}

.page-contact .contact-panel__note {
  margin: 0 0 20px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .contact-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .copy-btn {
  padding: 9px 16px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--orange);
  background: transparent;
  border: 1px solid rgba(255, 106, 43, .5);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .copy-btn:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: #17120F;
}

.page-contact .copy-btn.is-copied {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #06231F;
}

/* ---------- 章节头 ---------- */
.page-contact .chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: start;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-contact .chapter__num {
  font-family: var(--font-display);
  font-size: clamp(52px, 8vw, 104px);
  font-weight: 900;
  line-height: .82;
  letter-spacing: -.03em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 106, 43, .72);
}

.page-contact .chapter__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.3vw, 36px);
  line-height: 1.18;
  color: #FFFFFF;
}

.page-contact .chapter__note {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 渠道与写法 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.2vw, 44px);
  align-items: start;
}

.page-contact .channel-grid__figure {
  margin: 0;
  border: 1px solid var(--c-line);
  aspect-ratio: 14 / 9;
}

.page-contact .channel-grid__figure img,
.page-contact .visit-grid__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .media-frame__caption {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}

.page-contact .accordion {
  border-top: 1px solid var(--c-line-strong);
}

.page-contact .accordion__item {
  border-bottom: 1px solid var(--c-line);
}

.page-contact .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 2px;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 600;
  text-align: left;
  color: #FFFFFF;
  background: none;
  border: 0;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .accordion__trigger:hover {
  color: var(--orange);
}

.page-contact .accordion__index {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  border: 1px solid rgba(255, 106, 43, .5);
}

.page-contact .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-left: auto;
}

.page-contact .accordion__icon::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--cyan);
}

.page-contact .accordion__icon::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 50%;
  width: 1px;
  background: var(--cyan);
  transition: transform var(--t-mid) var(--ease), opacity var(--t-mid) var(--ease);
}

.page-contact .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-contact .accordion__body {
  padding: 0 2px 22px 50px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-contact .accordion__body p {
  margin: 0 0 12px;
}

.page-contact .accordion__body p:last-child {
  margin-bottom: 0;
}

.page-contact .write-tip {
  padding: 12px 14px;
  border-left: 2px solid var(--cyan);
  background: rgba(37, 230, 200, .07);
  color: #CFEFE8;
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .write-tip__tag {
  margin-right: 8px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

/* ---------- 合作 ---------- */
.page-contact .coop {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.2vw, 46px);
  align-items: start;
}

.page-contact .coop__intro {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--orange);
}

.page-contact .coop__intro .eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--orange);
}

.page-contact .coop__title {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.2;
  color: #FFFFFF;
}

.page-contact .coop__intro p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-contact .coop__list {
  list-style: none;
  counter-reset: coop;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .coop__list li {
  counter-increment: coop;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--ink-900);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dark);
}

.page-contact .coop__list li::before {
  content: counter(coop, decimal-leading-zero);
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

/* ---------- 地址 ---------- */
.page-contact .visit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: stretch;
}

.page-contact .info-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--cyan);
}

.page-contact .info-bar__mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid var(--cyan);
}

.page-contact .info-bar__mark::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid var(--cyan);
  opacity: .55;
}

.page-contact .info-bar__label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .info-bar__value {
  margin: 0 0 10px;
  font-size: clamp(16px, 2.1vw, 20px);
  font-weight: 600;
  line-height: 1.55;
  color: #FFFFFF;
}

.page-contact .info-bar__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .visit-grid__figure {
  margin: 0;
  border: 1px solid var(--c-line);
  aspect-ratio: 3 / 2;
}

/* ---------- 备案 ---------- */
.page-contact .chapter--slim {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .legal-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .legal-strip__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 20px;
  background: var(--ink-900);
}

.page-contact .legal-strip__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--silver);
}

.page-contact .legal-strip__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: #FFFFFF;
  word-break: break-all;
}

.page-contact .legal-strip__value.mono-num {
  color: var(--cyan);
}

/* ---------- 页尾互链 ---------- */
.page-contact .aside-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  padding-top: 26px;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .page-contact .quick-fact {
    flex-direction: column;
    gap: 4px;
  }

  .page-contact .chapter__num {
    font-size: 48px;
  }

  .page-contact .accordion__body {
    padding-left: 2px;
  }

  .page-contact .legal-strip__item {
    padding: 16px;
  }
}

/* ---------- 宽屏栅格 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-card {
    grid-template-columns: 178px minmax(0, 1fr);
  }

  .page-contact .contact-card__rail {
    border-bottom: 0;
    border-right: 1px solid var(--c-line);
  }

  .page-contact .legal-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .chapter {
    grid-template-columns: auto minmax(0, 1fr);
    gap: clamp(18px, 3vw, 34px);
  }

  .page-contact .channel-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-contact .coop {
    grid-template-columns: minmax(0, 42fr) minmax(0, 58fr);
  }

  .page-contact .visit-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 42fr) minmax(0, 58fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .accordion__icon::after,
  .page-contact .segmented--rail .segmented__btn,
  .page-contact .copy-btn {
    transition: none;
  }
}