.page-contact {
  --contact-gap: clamp(24px, 4vw, 48px);
  --contact-pad: clamp(20px, 4vw, 44px);
  --contact-ridge: rgba(44, 224, 194, .35);
  background: var(--night);
  color: var(--mist);
  overflow-x: hidden;
}

.page-contact .eyebrow {
  margin: 0 0 10px;
}

.page-contact .section {
  padding: clamp(44px, 7vw, 88px) 0;
}

.page-contact .section-lede {
  max-width: 40em;
  color: var(--fog);
  font-size: var(--fs-annot);
  line-height: 1.8;
  margin: 12px 0 0;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 48px) 0 clamp(40px, 6vw, 76px);
  border-bottom: var(--line);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: .3;
  filter: saturate(.75) contrast(1.05);
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(158deg, rgba(10, 17, 32, .68) 0%, rgba(10, 17, 32, .93) 52%, var(--night) 100%),
    linear-gradient(90deg, rgba(18, 160, 106, .18), transparent 60%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--contact-gap);
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 8vw, 68px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--mist);
  text-shadow: 0 6px 0 rgba(6, 19, 31, .55);
}

.page-contact .contact-hero__text {
  max-width: 34em;
  margin: 18px 0 0;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: #cfdcd9;
}

.page-contact .contact-lines {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: var(--line);
  border-left: var(--line);
  border-right: var(--line);
  background: rgba(27, 39, 64, .78);
  box-shadow: var(--shadow-hard);
}

.page-contact .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 16px var(--contact-pad);
  border-bottom: var(--line);
}

.page-contact .contact-line:last-child {
  border-bottom: 0;
}

.page-contact .contact-line__key {
  flex: 0 0 auto;
  font-family: var(--font-serif);
  font-size: var(--fs-annot);
  color: var(--fog);
  letter-spacing: .04em;
}

.page-contact .contact-line__value {
  flex: 1 1 220px;
  min-width: 0;
  font-size: clamp(16px, 3.2vw, 26px);
  font-weight: 700;
  color: var(--cyan);
  overflow-wrap: anywhere;
  letter-spacing: .01em;
}

.page-contact .copy-btn {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: var(--fs-annot);
  font-weight: 700;
  color: var(--ink);
  background: var(--amber);
  border: 3px solid var(--ink);
  box-shadow: 0 5px 0 rgba(0, 0, 0, .5);
  cursor: pointer;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: var(--orange);
  transform: translateY(-2px);
}

.page-contact .copy-btn[data-copied] {
  background: var(--jade);
  color: var(--mist);
}

.page-contact .contact-hero__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .channel-card {
  position: relative;
  padding: 18px 20px 18px 26px;
  background: rgba(18, 28, 46, .86);
  border: 3px solid var(--iron);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--jade);
  transform: scaleY(.35);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-contact .channel-card:hover {
  transform: translateY(-2px);
  border-color: var(--jade);
}

.page-contact .channel-card:hover::before {
  transform: scaleY(1);
}

.page-contact .channel-card__mark {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: var(--cyan);
}

.page-contact .channel-card__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .channel-card__tip {
  margin: 0;
  font-size: var(--fs-annot);
  line-height: 1.7;
  color: var(--fog);
}

.page-contact .channel-card__tip a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 渠道分类 ---------- */
.page-contact .section--channels {
  background:
    linear-gradient(180deg, rgba(18, 28, 46, .9), rgba(10, 17, 32, 0) 70%);
}

.page-contact .tablist {
  display: flex;
  gap: 10px;
  margin: 26px 0 0;
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-contact .tab {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-size: var(--fs-annot);
  font-weight: 700;
  color: var(--fog);
  background: transparent;
  border: 3px solid var(--iron);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .tab:hover {
  color: var(--mist);
  border-color: var(--jade);
}

.page-contact .tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--jade);
  border-color: var(--jade);
}

.page-contact .tab-panel {
  margin-top: 22px;
  padding: var(--contact-pad);
  background: var(--slate);
  border: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-contact .tab-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .tab-panel p {
  max-width: 40em;
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: #cfdcd9;
}

.page-contact .tip-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .tip-list li {
  position: relative;
  padding-left: 22px;
  font-size: var(--fs-annot);
  line-height: 1.75;
  color: var(--fog);
}

.page-contact .tip-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 12px;
  height: 3px;
  background: var(--cyan);
}

.page-contact .tip-list a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

html[data-js] .page-contact .tablist {
  display: flex;
}

html[data-js] .page-contact .tab-panel {
  display: none;
}

html[data-js] .page-contact .tab-panel[data-open] {
  display: block;
}

/* ---------- 服务时间与维护 ---------- */
.page-contact .hours-grid {
  display: grid;
  gap: var(--contact-gap);
  align-items: start;
}

.page-contact .maintenance-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-contact .maintenance-list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 3px solid var(--iron);
}

.page-contact .maintenance-list__time {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-contact .maintenance-list__text {
  font-size: var(--fs-annot);
  line-height: 1.75;
  color: #cfdcd9;
}

.page-contact .disclosure {
  margin-top: 24px;
}

.page-contact .disclosure summary {
  font-family: var(--font-serif);
  font-size: var(--fs-body);
  color: var(--mist);
}

.page-contact .disclosure__body p {
  max-width: 40em;
  font-size: var(--fs-annot);
  line-height: 1.85;
  color: var(--fog);
}

.page-contact .hours-figure {
  margin: 0;
}

.page-contact .hours-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-contact .hours-figure .media-frame__caption {
  display: block;
  margin-top: 12px;
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--fog);
}

/* ---------- 通信地址 ---------- */
.page-contact .section--address {
  padding-top: 0;
}

.page-contact .mail-address {
  position: relative;
  padding: clamp(32px, 6vw, 64px) var(--contact-pad) clamp(40px, 7vw, 76px);
  transition: transform var(--dur) var(--ease);
}

.page-contact .mail-address::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, var(--navy) 0%, var(--slate) 55%, var(--night) 100%);
  clip-path: polygon(0 0, 100% 9%, 100% 100%, 0 91%);
  border: var(--line);
  transition: background var(--dur) var(--ease);
}

.page-contact .mail-address:hover::before {
  background: linear-gradient(135deg, var(--jade-deep) 0%, var(--navy) 60%, var(--night) 100%);
}

.page-contact .mail-address > * {
  position: relative;
  z-index: 1;
}

.page-contact .mail-address h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 5vw, 42px);
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-contact .mail-address__value {
  max-width: 30em;
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 3.4vw, 26px);
  line-height: 1.6;
  color: var(--amber);
  overflow-wrap: anywhere;
}

.page-contact .mail-address__note {
  max-width: 40em;
  margin: 16px 0 0;
  font-size: var(--fs-annot);
  line-height: 1.8;
  color: #cfdcd9;
}

.page-contact .mail-address__ridge {
  display: block;
  width: min(600px, 100%);
  height: auto;
  margin-top: 26px;
  color: var(--contact-ridge);
}

/* ---------- 来信信息 ---------- */
.page-contact .section--prepare {
  background: linear-gradient(180deg, rgba(18, 28, 46, 0), rgba(18, 28, 46, .82));
}

.page-contact .ask-list {
  display: grid;
  gap: 16px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ask-item {
  position: relative;
  padding: 20px 20px 20px 26px;
  background: var(--night);
  border: 3px solid var(--iron);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .ask-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--amber);
  transform: scaleY(.3);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-contact .ask-item:hover {
  transform: translateY(-2px);
  border-color: var(--amber);
}

.page-contact .ask-item:hover::before {
  transform: scaleY(1);
}

.page-contact .ask-item__num {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-contact .ask-item__title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .ask-item p {
  margin: 0;
  font-size: var(--fs-annot);
  line-height: 1.75;
  color: var(--fog);
}

/* ---------- 合作 ---------- */
.page-contact .partner-grid {
  margin-top: 28px;
}

.page-contact .partner-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
}

.page-contact .partner-card .card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .partner-card p {
  margin: 0;
  font-size: var(--fs-annot);
  line-height: 1.75;
  color: var(--fog);
}

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

.page-contact .partner-tail {
  margin: 26px 0 0;
  font-size: var(--fs-annot);
  line-height: 1.8;
  color: var(--fog);
}

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

/* ---------- 收尾 ---------- */
.page-contact .contact-tail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0 0 clamp(32px, 5vw, 56px);
  padding-top: 18px;
  border-top: 3px solid var(--iron);
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--fog);
}

.page-contact .contact-tail .u-mono {
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .hours-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-contact .ask-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ask-item:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-contact .contact-hero__aside {
    padding-top: 56px;
  }

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

  .page-contact .ask-item:first-child {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .copy-btn,
  .page-contact .channel-card,
  .page-contact .channel-card::before,
  .page-contact .ask-item,
  .page-contact .ask-item::before,
  .page-contact .mail-address {
    transition: none;
  }
}