.page-contact {
  --contact-line: rgba(255, 154, 69, 0.26);
  --contact-line-strong: rgba(255, 154, 69, 0.62);
  --contact-soft: rgba(255, 154, 69, 0.10);
}

.page-contact .eyebrow {
  color: var(--amber);
}

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

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 460px;
  z-index: 0;
  background: radial-gradient(62% 100% at 20% 0%, rgba(255, 154, 69, 0.18), rgba(7, 11, 24, 0));
  pointer-events: none;
  animation: contact-breathe 11s ease-in-out infinite;
}

.page-contact .contact-hero > .shell {
  position: relative;
  z-index: 1;
}

@keyframes contact-breathe {
  0%, 100% { transform: translate3d(0, 0, 0); opacity: 1; }
  50% { transform: translate3d(0, -12px, 0); opacity: 0.84; }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-hero::before { animation: none; }
}

.page-contact .crumbs {
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-contact .contact-hero__ambient {
  position: relative;
  margin: 0 0 clamp(1.75rem, 4vw, 3rem);
  border: 1px solid var(--contact-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .contact-hero__ambient::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 24, 0.08) 0%, rgba(7, 11, 24, 0.86) 100%);
  pointer-events: none;
}

.page-contact .contact-hero__ambient img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 800;
  object-fit: cover;
}

@media (min-width: 768px) {
  .page-contact .contact-hero__ambient img {
    aspect-ratio: 1200 / 440;
  }
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 2.75rem);
}

@media (min-width: 1000px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

.page-contact h1 {
  margin: 0.35rem 0 0.9rem;
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-contact .lede {
  max-width: 46ch;
  color: var(--mist);
  font-size: clamp(0.98rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
}

/* ---------- 三条通道 ---------- */

.page-contact .channel-list {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .channel {
  position: relative;
  padding: 20px 22px 20px 30px;
  border: 1px solid var(--contact-line);
  border-radius: 6px 20px 20px 20px;
  background:
    linear-gradient(135deg, var(--contact-soft), rgba(16, 23, 49, 0) 58%),
    var(--panel-2);
  transition: border-color 320ms var(--ease), box-shadow 320ms var(--ease);
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--amber), rgba(255, 154, 69, 0));
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  border-color: var(--contact-line-strong);
  box-shadow: 0 0 0 1px rgba(255, 154, 69, 0.16), 0 20px 46px -32px rgba(255, 154, 69, 0.55);
}

.page-contact .channel__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.page-contact .channel__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(255, 154, 69, 0.78);
}

.page-contact .channel__key {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--silver);
  letter-spacing: -0.01em;
}

.page-contact .channel__value {
  margin: 8px 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(0.94rem, 2.4vw, 1.06rem);
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--amber);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel__note {
  margin: 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.82;
}

/* ---------- 区位示意 ---------- */

.page-contact .locator {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
}

@media (min-width: 1000px) {
  .page-contact .locator {
    position: sticky;
    top: 88px;
  }
}

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

.page-contact .locator__frame {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.page-contact .locator__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 600;
  object-fit: cover;
}

.page-contact .locator__caption {
  margin: 14px 2px 2px;
  color: var(--mist);
  font-size: 0.88rem;
  line-height: 1.78;
}

/* ---------- 准备清单 ---------- */

.page-contact .prep {
  margin-top: clamp(3rem, 8vw, 5.5rem);
}

.page-contact .section-head h2 {
  margin: 0.35rem 0 0.75rem;
  font-size: clamp(1.5rem, 4vw, 2.3rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-contact .prep-list {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .prep-item__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .prep-item__title {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-contact .prep-item__text {
  grid-column: 2;
  margin: 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.82;
}

@media (min-width: 860px) {
  .page-contact .prep-item {
    grid-template-columns: 56px minmax(0, 240px) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 22px 0;
  }

  .page-contact .prep-item__no,
  .page-contact .prep-item__text {
    padding-top: 0;
  }

  .page-contact .prep-item__text {
    grid-column: 3;
  }
}

/* ---------- 合作与反馈 ---------- */

.page-contact .coop {
  margin-top: clamp(3rem, 8vw, 5.5rem);
}

.page-contact .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 2.5rem);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

@media (min-width: 1000px) {
  .page-contact .coop-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

.page-contact .coop-folds {
  display: grid;
  gap: 12px;
}

.page-contact .coop-fold {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 154, 69, 0.06), rgba(16, 23, 49, 0) 70%), var(--panel-2);
  overflow: hidden;
  transition: border-color 320ms var(--ease);
}

.page-contact .coop-fold:hover {
  border-color: var(--contact-line);
}

.page-contact .coop-fold .coop-fold__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 56px;
  padding: 18px 20px;
  border: 0;
  background: none;
  color: var(--silver);
  font-family: inherit;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  letter-spacing: -0.01em;
  cursor: pointer;
}

.page-contact .coop-fold .coop-fold__btn::after {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: 4px;
  border-right: 2px solid var(--amber);
  border-bottom: 2px solid var(--amber);
  transform: rotate(45deg);
  transition: transform 300ms var(--ease);
}

.page-contact .coop-fold .coop-fold__btn[aria-expanded="true"]::after {
  transform: rotate(-135deg);
}

.page-contact .coop-fold .coop-fold__panel {
  padding: 0 20px 4px;
}

.page-contact .coop-fold .coop-fold__panel p {
  margin: 0 0 14px;
  max-width: 66ch;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.85;
}

.page-contact .coop-fold .coop-fold__panel p:last-child {
  margin-bottom: 18px;
}

.page-contact .coop-fold .coop-fold__panel a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-contact .coop-fold .coop-fold__panel a:hover {
  color: var(--cyan);
}

.page-contact .coop-aside {
  padding: 24px 22px;
  border: 1px solid var(--contact-line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--contact-soft), rgba(16, 23, 49, 0) 62%), var(--panel);
}

.page-contact .coop-aside__title {
  margin: 0 0 10px;
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-contact .coop-aside__note {
  margin: 0 0 18px;
  color: var(--mist);
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-contact .coop-aside__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-contact .coop-aside__list li + li {
  border-top: 1px solid var(--line);
}

.page-contact .coop-aside__list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 10px 26px 10px 0;
  color: var(--silver);
  font-size: 0.95rem;
  line-height: 1.6;
  text-decoration: none;
  position: relative;
  transition: color 240ms var(--ease);
}

.page-contact .coop-aside__list a::after {
  content: "";
  position: absolute;
  right: 6px;
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--mist);
  border-right: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

.page-contact .coop-aside__list a:hover {
  color: var(--amber);
}

.page-contact .coop-aside__list a:hover::after {
  border-color: var(--amber);
  transform: translateX(3px) rotate(45deg);
}

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