.page-contact {
  --contact-gap: clamp(16px, 2.4vw, 28px);
  --contact-inset: clamp(18px, 4vw, 48px);
  --contact-pad: clamp(20px, 2.8vw, 34px);
  --contact-width: 1280px;
  position: relative;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(90% 55% at 12% 0%, rgba(11, 46, 38, .85), transparent 62%),
    radial-gradient(70% 50% at 92% 8%, rgba(42, 44, 90, .38), transparent 66%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 46%, var(--bg) 100%);
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
}

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

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  width: min(var(--contact-width), 100% - 2 * var(--contact-inset));
  margin-inline: auto;
  padding-block: clamp(44px, 7vw, 92px) clamp(36px, 5vw, 68px);
}

.page-contact .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(20px, 2.6vw, 32px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-contact .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-contact .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms ease, border-color 200ms ease;
}

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

.page-contact .hero-head {
  max-width: 780px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-contact .hero-index {
  display: inline-block;
  margin-bottom: 16px;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-contact h1 {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact h1::after {
  content: "";
  display: block;
  width: 68px;
  height: 3px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
}

.page-contact .lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 首屏双卡 ---------- */

.page-contact .hero-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .card {
  position: relative;
  padding: var(--contact-pad);
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background: var(--panel);
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-contact .card:hover {
  border-color: rgba(47, 243, 208, .5);
  transform: translateY(-2px);
}

.page-contact .card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.page-contact .card-title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-contact .contact-card {
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
  border-color: var(--line);
  background:
    radial-gradient(120% 80% at 0% 0%, rgba(201, 164, 76, .12), transparent 62%),
    var(--char);
}

.page-contact .channel-list {
  margin: 0;
  display: grid;
}

.page-contact .channel-row {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .channel-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .channel-row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-contact .channel-row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.8vw, 16px);
  letter-spacing: .02em;
  color: var(--text);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line);
  word-break: break-all;
  transition: color 200ms ease, border-color 200ms ease;
}

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

.page-contact .channel-value--plain {
  border-bottom-color: transparent;
}

.page-contact .contact-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  overflow: hidden;
}

.page-contact .contact-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.7) brightness(.82);
}

/* ---------- 地址卡 ---------- */

.page-contact .address-card {
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
  align-content: start;
  background:
    radial-gradient(110% 90% at 100% 0%, rgba(42, 44, 90, .5), transparent 64%),
    var(--panel);
}

.page-contact .address-layers {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-contact .address-layers li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-contact .address-layers li:last-child {
  border-bottom: 0;
}

.page-contact .layer-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-contact .layer-val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
}

.page-contact .address-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .seal {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--gold);
  border-radius: 10px;
  background: rgba(201, 164, 76, .07);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease;
}

.page-contact .seal:hover,
.page-contact .seal:focus-visible {
  border-color: var(--gold-2);
  background: rgba(201, 164, 76, .16);
  color: var(--gold-2);
  outline: none;
}

.page-contact .seal-label {
  padding-right: 12px;
  border-right: 1px solid var(--line);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-contact .seal-value {
  color: var(--text);
}

/* ---------- 章节骨架 ---------- */

.page-contact .section {
  width: min(var(--contact-width), 100% - 2 * var(--contact-inset));
  margin-inline: auto;
  padding-block: clamp(44px, 6vw, 84px);
  border-top: 1px solid var(--line-soft);
}

.page-contact .section-head {
  display: grid;
  gap: 14px;
  max-width: 760px;
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-contact .section-index {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--gold);
  opacity: .55;
}

.page-contact .section-title {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.005em;
}

.page-contact .section-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 01 渠道分流 ---------- */

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 22px);
}

.page-contact .channel-card {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: var(--char);
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-contact .channel-card:hover {
  border-color: rgba(47, 243, 208, .5);
  transform: translateY(-2px);
}

.page-contact .channel-card--mail {
  background: linear-gradient(158deg, rgba(11, 46, 38, .95), var(--char) 72%);
}

.page-contact .channel-card--phone {
  background: linear-gradient(158deg, rgba(110, 31, 53, .5), var(--char) 74%);
}

.page-contact .channel-card--visit {
  background: linear-gradient(158deg, rgba(42, 44, 90, .58), var(--char) 76%);
}

.page-contact .channel-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .channel-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

.page-contact .channel-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--muted);
}

.page-contact .channel-foot {
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--gold-2) !important;
}

/* ---------- 02 邮件写法 ---------- */

.page-contact .mail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 36px);
}

.page-contact .mail-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ms;
  display: grid;
}

.page-contact .mail-steps li {
  counter-increment: ms;
  position: relative;
  padding: 18px 0 18px 48px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .mail-steps li:first-child {
  padding-top: 6px;
}

.page-contact .mail-steps li::before {
  content: counter(ms, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-contact .mail-steps li:first-child::before {
  top: 8px;
}

.page-contact .mail-sample-wrap {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-contact .sample-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-contact .mail-sample {
  margin: 0;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: 12px;
  background: var(--char);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  letter-spacing: .02em;
  color: var(--muted);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.page-contact .sample-key {
  color: var(--gold-2);
}

/* ---------- 03 纠错与补充 ---------- */

.page-contact .fix-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 42px);
}

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

.page-contact .fix-types li {
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--gold);
}

.page-contact .fix-types h3 {
  margin: 0 0 7px;
  font-size: 15.5px;
  font-weight: 700;
}

.page-contact .fix-types p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
}

.page-contact .fix-submit-title {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
}

.page-contact .fix-points {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .fix-points li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .fix-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  border-radius: 2px;
}

.page-contact .flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-contact .flow-step {
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: var(--panel);
  font-size: 14px;
  line-height: 1.68;
  color: var(--text);
  transition: border-color 200ms ease;
}

.page-contact .flow-step:hover {
  border-color: rgba(47, 243, 208, .45);
}

.page-contact .flow-step span {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .fix-foot {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
}

.page-contact .fix-foot a {
  color: var(--gold-2);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 200ms ease, border-color 200ms ease;
}

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

/* ---------- 04 合作折叠 ---------- */

.page-contact .collab-list {
  display: grid;
  gap: 12px;
}

.page-contact .details {
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: var(--char);
  overflow: hidden;
  transition: border-color 200ms ease;
}

.page-contact .details:hover,
.page-contact .details[open] {
  border-color: rgba(201, 164, 76, .58);
}

.page-contact .details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(18px, 2.4vw, 26px);
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

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

.page-contact .details summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
  transition: color 220ms ease;
}

.page-contact .details[open] summary::after {
  content: "\2212";
  color: var(--cyan);
}

.page-contact .details-body {
  padding: 16px clamp(18px, 2.4vw, 26px) 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .details-body p {
  margin: 0 0 10px;
}

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

.page-contact .details-body a {
  color: var(--gold-2);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 200ms ease, border-color 200ms ease;
}

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

/* ---------- 05 到访 ---------- */

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

.page-contact .visit-body {
  display: grid;
  gap: 18px;
  align-content: start;
  justify-items: start;
}

.page-contact .visit-steps {
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: vs;
  display: grid;
}

.page-contact .visit-steps li {
  counter-increment: vs;
  position: relative;
  padding: 16px 0 16px 46px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-contact .visit-steps li::before {
  content: counter(vs);
  position: absolute;
  left: 0;
  top: 17px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.page-contact .visit-foot {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--muted);
}

.page-contact .visit-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

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

/* ---------- 06 备案 ---------- */

.page-contact .legal-block {
  display: grid;
  gap: 16px;
  max-width: 880px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(140deg, rgba(42, 44, 90, .42), rgba(11, 46, 38, .72));
}

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

.page-contact .legal-number {
  font-family: var(--font-mono);
  letter-spacing: .04em;
  color: var(--gold-2);
}

/* ---------- 收尾邮箱条 ---------- */

.page-contact .mail-bar {
  width: min(var(--contact-width), 100% - 2 * var(--contact-inset));
  margin: 0 auto clamp(44px, 5vw, 76px);
  padding: clamp(20px, 3vw, 32px) clamp(20px, 3.2vw, 40px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(90deg, rgba(201, 164, 76, .14), transparent 42%, rgba(47, 243, 208, .1)),
    var(--char);
}

.page-contact .mail-bar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-contact .mail-bar-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-contact .mail-bar-value {
  flex: 1 1 240px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 20px);
  letter-spacing: .02em;
  color: var(--text);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line);
  word-break: break-all;
  transition: color 200ms ease, border-color 200ms ease;
}

.page-contact .mail-bar-value:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 复制按钮 ---------- */

.page-contact .copy-chip {
  min-height: 30px;
  padding: 5px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold-2);
  cursor: pointer;
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.page-contact .copy-chip:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .copy-chip.is-copied {
  color: var(--bg);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .copy-chip--lg {
  min-height: 38px;
  padding: 9px 22px;
  font-size: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-contact .channel-grid {
    grid-template-columns: 5fr 4fr 3fr;
  }

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

@media (min-width: 900px) {
  .page-contact .hero-cards {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-contact .mail-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-contact .fix-grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-contact .visit-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .card,
  .page-contact .channel-card,
  .page-contact .copy-chip,
  .page-contact .seal,
  .page-contact .details,
  .page-contact .flow-step {
    transition: none;
  }

  .page-contact .card:hover,
  .page-contact .channel-card:hover {
    transform: none;
  }
}