.page-contact {
  --contact-rule: 2px solid var(--ink);
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-contact a:focus-visible {
  outline: 3px solid var(--aurora);
  outline-offset: 2px;
}

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

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  background: var(--ice-deep);
  color: var(--bone);
  border-bottom: var(--contact-rule);
  padding: clamp(26px, 5vw, 56px) 0 clamp(34px, 6vw, 72px);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  align-items: center;
}

.page-contact .contact-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .contact-hero .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .contact-hero .breadcrumb a:hover {
  color: var(--bone);
  border-bottom-color: var(--lava);
}

.page-contact .contact-hero .kicker {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.22em;
  color: var(--lava);
}

.page-contact .contact-hero h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-contact .contact-hero .lede {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.8;
  color: #D7E1EA;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .contact-hero .btn {
  background: var(--bone);
  color: var(--ice-deep);
  border: 2px solid var(--bone);
  box-shadow: none;
}

.page-contact .contact-hero .btn--lava {
  background: var(--lava);
  border-color: var(--lava);
  color: #FFFFFF;
}

.page-contact .contact-hero .btn--lava:hover,
.page-contact .contact-hero .btn--lava:focus-visible {
  background: var(--bone);
  border-color: var(--bone);
  color: var(--ice-deep);
}

.page-contact .contact-hero__media {
  margin: 0;
  border: 2px solid rgba(244, 241, 234, 0.45);
  box-shadow: 12px 12px 0 rgba(226, 84, 43, 0.6);
  background: var(--glacier);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
}

/* ---------- 章节索引条 ---------- */
.page-contact .contact-index {
  background: var(--ink);
  border-bottom: var(--contact-rule);
}

.page-contact .contact-index__inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-top: 12px;
  padding-bottom: 12px;
  scrollbar-width: thin;
}

.page-contact .contact-index a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid rgba(244, 241, 234, 0.3);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .contact-index a:hover,
.page-contact .contact-index a:focus-visible,
.page-contact .contact-index a.is-active,
.page-contact .contact-index a[aria-current="true"] {
  border-color: var(--lava);
  background: rgba(226, 84, 43, 0.16);
  color: var(--lava);
}

.page-contact .contact-index__num {
  color: var(--ivory);
  font-size: 11px;
}

/* ---------- 通用小件 ---------- */
.page-contact .contact-lede {
  max-width: 62ch;
  margin-top: 12px;
}

.page-contact .section-number {
  color: var(--lava);
}

.page-contact .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

/* ---------- 01 直接联系 ---------- */
.page-contact .contact-channels {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-contact .contact-channel {
  border: var(--contact-rule);
  background: var(--bone);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .contact-channel--dark {
  background: var(--ice-deep);
  color: var(--bone);
  box-shadow: 6px 6px 0 var(--lava);
}

.page-contact .contact-channel > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .contact-channel--dark > p {
  color: #D7E1EA;
}

.page-contact .contact-channel__title {
  margin: 14px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 3.4vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
  color: var(--ink);
}

.page-contact .contact-channel--dark .contact-channel__title {
  color: var(--bone);
}

.page-contact .contact-channel__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid rgba(23, 18, 15, 0.2);
}

.page-contact .contact-channel--dark .contact-channel__list {
  border-top-color: rgba(244, 241, 234, 0.28);
}

.page-contact .contact-channel__list li {
  position: relative;
  padding: 11px 0 11px 20px;
  font-size: 14.5px;
  line-height: 1.7;
  border-bottom: 1px dashed rgba(23, 18, 15, 0.18);
}

.page-contact .contact-channel--dark .contact-channel__list li {
  border-bottom-color: rgba(244, 241, 234, 0.2);
  color: #D7E1EA;
}

.page-contact .contact-channel__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--lava);
  font-family: var(--font-mono);
}

/* ---------- 02 事项分流 ---------- */
.page-contact .route-grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-contact .route-card {
  border: var(--contact-rule);
  background: var(--bone);
  box-shadow: 5px 5px 0 rgba(11, 34, 57, 0.22);
}

.page-contact .route-card > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 17px 18px;
  border-left: 8px solid var(--glacier);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(16px, 2.4vw, 20px);
  line-height: 1.4;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .route-card > summary::-webkit-details-marker {
  display: none;
}

.page-contact .route-card > summary:hover {
  background: var(--cream);
}

.page-contact .route-card[open] > summary {
  background: var(--ice-deep);
  border-left-color: var(--lava);
  color: var(--bone);
}

.page-contact .route-card[open] > summary:hover {
  background: var(--ice-deep);
}

.page-contact .route-card__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--lava);
}

.page-contact .route-card[open] .route-card__num {
  color: var(--aurora);
}

.page-contact .route-card__body {
  border-top: var(--contact-rule);
  padding: 18px 18px 20px;
}

.page-contact .route-card__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .route-card__link {
  display: inline-block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--lava);
  text-decoration: none;
  border-bottom: 2px solid currentColor;
  padding-bottom: 2px;
}

.page-contact .route-card__link:hover {
  color: var(--ink);
}

.page-contact .contact-diagram {
  margin: 32px 0 0;
  border: var(--contact-rule);
  box-shadow: var(--shadow-hard);
  background: var(--bone);
}

.page-contact .contact-diagram img {
  display: block;
  width: 100%;
}

.page-contact .contact-diagram .media-frame__caption {
  border-top: var(--contact-rule);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: var(--cream);
}

/* ---------- 03 合作 ---------- */
.page-contact .coop {
  display: grid;
  gap: 24px;
  margin-top: 30px;
}

.page-contact .coop__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: coopstep;
}

.page-contact .coop__steps li {
  position: relative;
  counter-increment: coopstep;
  padding: 0 0 22px 48px;
}

.page-contact .coop__steps li::before {
  content: "0" counter(coopstep);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--lava);
}

.page-contact .coop__steps strong {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17.5px;
  line-height: 1.4;
}

.page-contact .coop__steps span {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .coop__card {
  background: var(--ice-deep);
  color: var(--bone);
  border: var(--contact-rule);
  box-shadow: 8px 8px 0 var(--lava);
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .coop__card-title {
  margin: 14px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 3vw, 25px);
  line-height: 1.3;
  color: var(--bone);
}

.page-contact .coop__card p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.8;
  color: #D7E1EA;
}

.page-contact .coop__card .btn {
  margin-top: 4px;
}

/* ---------- 04 来信与服务范围 ---------- */
.page-contact .section--dark .h-section {
  color: var(--bone);
}

.page-contact .section--dark .section-number {
  color: var(--aurora);
}

.page-contact .addr-grid {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-contact .addr-card {
  border: 2px solid var(--bone);
  background: rgba(244, 241, 234, 0.07);
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .addr-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ivory);
}

.page-contact .addr-card__value {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3.2vw, 28px);
  line-height: 1.35;
  color: var(--bone);
}

.page-contact .addr-card__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #C8D4DE;
}

.page-contact .addr-text p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: #C8D4DE;
}

.page-contact .range-band {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 2px solid var(--bone);
}

.page-contact .range-band__origin {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--aurora);
}

.page-contact .range-band__origin::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 9px;
  background: var(--aurora);
  vertical-align: middle;
}

.page-contact .range-band__cells {
  list-style: none;
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
}

.page-contact .range-band__cells li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  border-left: 6px solid var(--glacier);
  background: rgba(244, 241, 234, 0.08);
  padding: 11px 14px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .range-band__cells li:hover {
  border-left-color: var(--lava);
  background: rgba(226, 84, 43, 0.18);
}

.page-contact .range-band__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .range-band__val {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  color: var(--bone);
}

.page-contact .range-band__reach {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--bone);
}

.page-contact .range-band__reach strong {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  color: var(--lava);
  margin: 0 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 780px) {
  .page-contact .route-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .addr-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 32px;
  }

  .page-contact .contact-index__inner {
    justify-content: flex-start;
    gap: 10px;
  }
}

@media (min-width: 880px) {
  .page-contact .contact-channels {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .coop {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 34px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    gap: clamp(32px, 4vw, 60px);
  }
}

@media (min-width: 720px) {
  .page-contact .range-band__cells {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-contact .range-band__cells li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 14px 12px;
    min-height: 92px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-index a,
  .page-contact .route-card > summary,
  .page-contact .range-band__cells li,
  .page-contact .contact-hero .breadcrumb a {
    transition: none;
  }
}