.page-contact {
  --ct-gap: clamp(24px, 3.4vw, 48px);
  --ct-card-pad: clamp(18px, 2.2vw, 26px);
  --ct-hair: 1px dashed var(--orbit);
  padding-bottom: clamp(40px, 7vw, 88px);
  overflow-x: clip;
}

.page-contact .contact-crumbs {
  padding-top: clamp(16px, 2.5vw, 28px);
}

/* ---------- 首屏：左叙事 + 右联系卡 ---------- */
.page-contact .contact-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ct-gap);
  padding-top: clamp(20px, 3vw, 36px);
}

.page-contact .contact-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--warm);
  text-wrap: balance;
}

.page-contact .contact-hero__intro {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.85;
  color: var(--warm-soft);
}

.page-contact .contact-hero__media {
  position: relative;
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  border-radius: 0 0 var(--radius) var(--radius);
  background: linear-gradient(to top, rgba(7, 11, 27, 0.88), rgba(7, 11, 27, 0));
  pointer-events: none;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

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

.page-contact .channel-card {
  position: relative;
  padding: var(--ct-card-pad) var(--ct-card-pad) var(--ct-card-pad) calc(var(--ct-card-pad) + 8px);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--orbit);
  border-radius: var(--radius) 0 0 var(--radius);
  transition: background var(--dur) var(--ease);
}

.page-contact .channel-card--gold::before {
  background: var(--gold);
}

.page-contact .channel-card:hover {
  border-color: var(--gold);
  transform: translate(-2px, -2px);
}

.page-contact .channel-card:hover::before {
  background: var(--gold);
}

.page-contact .channel-card__label {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .channel-card__value {
  margin: 0 0 10px;
  font-size: clamp(15px, 1.6vw, 19px);
  line-height: 1.45;
  color: var(--warm);
  word-break: break-all;
  user-select: all;
}

.page-contact .channel-card--gold .channel-card__value {
  color: var(--gold);
}

.page-contact .channel-card__value--text {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
  word-break: normal;
}

.page-contact .channel-card__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .service-window {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: center;
  padding: var(--ct-card-pad);
  border: 2px solid var(--orbit);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(57, 224, 208, 0.09), rgba(15, 23, 48, 0.94));
}

.page-contact .service-window__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(57, 224, 208, 0.16);
}

.page-contact .service-window__title {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .service-window__time {
  margin: 4px 0 0;
  font-size: clamp(15px, 1.4vw, 17px);
  color: var(--warm);
}

.page-contact .service-window__hint {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  padding-top: 12px;
  border-top: var(--ct-hair);
  font-size: 14px;
  line-height: 1.75;
  color: var(--warm-soft);
}

/* ---------- 问题分类切换 ---------- */
.page-contact .inquiry {
  margin-top: clamp(48px, 7vw, 96px);
}

.page-contact .inquiry__head {
  max-width: 62ch;
}

.page-contact .inquiry__lede {
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--warm-soft);
}

.page-contact .switcher {
  margin-top: clamp(24px, 3vw, 36px);
}

.page-contact .switcher__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

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

.page-contact .switcher__chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 18px;
  border: 2px solid var(--orbit);
  border-radius: 999px;
  background: transparent;
  color: var(--warm-soft);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .switcher__chip::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orbit);
  transition: background var(--dur) var(--ease);
}

.page-contact .switcher__chip:hover {
  border-color: var(--gold);
  color: var(--warm);
  transform: translateY(-1px);
}

.page-contact .switcher__input:focus-visible ~ .switcher__chips {
  outline: 2px solid var(--cyan);
  outline-offset: 5px;
  border-radius: var(--radius);
}

.page-contact #topic-schedule:checked ~ .switcher__chips label[for="topic-schedule"],
.page-contact #topic-column:checked ~ .switcher__chips label[for="topic-column"],
.page-contact #topic-usage:checked ~ .switcher__chips label[for="topic-usage"],
.page-contact #topic-coop:checked ~ .switcher__chips label[for="topic-coop"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--void);
  font-weight: 700;
}

.page-contact #topic-schedule:checked ~ .switcher__chips label[for="topic-schedule"]::before,
.page-contact #topic-column:checked ~ .switcher__chips label[for="topic-column"]::before,
.page-contact #topic-usage:checked ~ .switcher__chips label[for="topic-usage"]::before,
.page-contact #topic-coop:checked ~ .switcher__chips label[for="topic-coop"]::before {
  background: var(--void);
}

.page-contact .switcher__panel {
  display: none;
  margin-top: 20px;
  padding: clamp(20px, 2.6vw, 34px);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.page-contact #topic-schedule:checked ~ .switcher__panels [data-panel="schedule"],
.page-contact #topic-column:checked ~ .switcher__panels [data-panel="column"],
.page-contact #topic-usage:checked ~ .switcher__panels [data-panel="usage"],
.page-contact #topic-coop:checked ~ .switcher__panels [data-panel="coop"] {
  display: block;
  animation: ct-panel-in 200ms var(--ease) both;
}

.page-contact .switcher__panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  color: var(--warm);
}

.page-contact .switcher__panel p {
  margin: 0 0 16px;
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--warm-soft);
}

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

.page-contact .switcher__panel a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 193, 78, 0.5);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .switcher__panel a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--warm);
}

.page-contact .checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 16px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 处理流程 ---------- */
.page-contact .handling {
  margin-top: clamp(52px, 8vw, 104px);
}

.page-contact .handling__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 80px);
}

.page-contact .handling__lead p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--warm-soft);
}

.page-contact .handling__media {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-contact .handling__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  border: var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-contact .handling__steps {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  border-left: 1px dashed var(--orbit);
  display: grid;
  gap: 28px;
}

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

.page-contact .step::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--cyan);
}

.page-contact .step__num {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-contact .step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 700;
  color: var(--warm);
}

.page-contact .step p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 提交前准备 ---------- */
.page-contact .prepare {
  margin-top: clamp(52px, 8vw, 104px);
}

.page-contact .prepare__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-contact .prepare__item {
  padding-top: 18px;
  border-top: 2px solid var(--orbit);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .prepare__item:hover {
  border-top-color: var(--gold);
}

.page-contact .prepare__key {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-contact .prepare__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--warm);
}

.page-contact .prepare__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .prepare__foot {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding-top: 20px;
  border-top: var(--ct-hair);
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-soft);
}

.page-contact .prepare__foot a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 193, 78, 0.5);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .prepare__foot a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 内容合作 ---------- */
.page-contact .coop {
  margin-top: clamp(52px, 8vw, 104px);
}

.page-contact .coop .shell {
  padding-block: clamp(40px, 6vw, 80px);
}

.page-contact .coop__lede {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--warm-soft);
}

.page-contact .coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(26px, 3.4vw, 40px);
}

.page-contact .coop__card {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.4vw, 28px);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .coop__card:hover {
  transform: translate(-3px, -3px);
  border-color: var(--gold);
}

.page-contact .coop__card h3 {
  margin: 16px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--warm);
}

.page-contact .coop__card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--warm-soft);
}

.page-contact .coop__meta {
  margin-top: auto;
  margin-bottom: 0;
  padding-top: 14px;
  border-top: var(--ct-hair);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-contact .coop__foot {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding-top: 20px;
  border-top: var(--ct-hair);
  font-size: 15px;
  line-height: 1.85;
  color: var(--warm-soft);
}

.page-contact .coop__foot a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 193, 78, 0.5);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .coop__foot a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 底部轨道收束 ---------- */
.page-contact .rail-close {
  position: relative;
  height: 26px;
  margin-top: clamp(44px, 7vw, 88px);
  border-top: 2px solid var(--gold);
}

.page-contact .rail-close::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 9px;
  border-bottom: 1px dashed var(--orbit);
  background: repeating-linear-gradient(to right, var(--orbit) 0 1px, transparent 1px 28px);
}

@keyframes ct-panel-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .prepare__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-contact .coop__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
    gap: clamp(32px, 4vw, 64px);
  }
}

@media (min-width: 940px) {
  .page-contact .handling__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .prepare__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}