.page-contact {
  --pc-hair: rgba(201, 196, 183, 0.85);
  --pc-dark-hair: rgba(245, 242, 234, 0.14);
  --pc-radius: 2px;
  background: var(--paper);
  color: var(--ink);
}

.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--on-dark-strong);
  padding-block: clamp(116px, 14vw, 172px) clamp(56px, 9vw, 104px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(41, 224, 194, 0.11) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(41, 224, 194, 0.08) 1px, transparent 1px);
  background-size: 64px 64px, 64px 64px;
  -webkit-mask-image: radial-gradient(120% 100% at 82% 4%, #000 18%, transparent 76%);
  mask-image: radial-gradient(120% 100% at 82% 4%, #000 18%, transparent 76%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -10%;
  top: 26%;
  z-index: -1;
  width: 58%;
  height: 120px;
  pointer-events: none;
  transform: rotate(-4deg);
  background: linear-gradient(90deg, rgba(255, 107, 53, 0), rgba(255, 107, 53, 0.2));
}

.page-contact .crumb {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-contact .crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--on-dark);
}

.page-contact .crumb-link {
  color: var(--on-dark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .crumb-link:hover,
.page-contact .crumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .crumb-current {
  color: var(--cyan);
}

.page-contact .crumb-sep {
  opacity: 0.4;
}

.page-contact .hero-grid {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
}

.page-contact h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-contact .hero-copy .lead {
  max-width: 46ch;
  margin: 0;
  font-size: clamp(1rem, 1.3vw, 1.0625rem);
  line-height: 1.75;
  color: var(--on-dark);
}

.page-contact .channel-list {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--pc-dark-hair);
}

.page-contact .channel {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--pc-dark-hair);
}

.page-contact .channel-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.6vw, 1.7rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel-value--mail {
  color: var(--on-dark-strong);
}

.page-contact .channel-value--phone {
  color: var(--orange);
}

.page-contact .channel-value--addr {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(1rem, 1.9vw, 1.2rem);
  color: var(--on-dark-strong);
}

.page-contact .channel-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark);
}

.page-contact .hero-figure {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-contact .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--pc-dark-hair);
  border-radius: var(--pc-radius);
  filter: saturate(0.85) contrast(1.05);
}

.page-contact .hero-figcap {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--on-dark);
}

@media (min-width: 720px) {
  .page-contact .channel {
    grid-template-columns: 128px minmax(0, 1fr);
    column-gap: 24px;
    row-gap: 4px;
    align-items: baseline;
  }

  .page-contact .channel-label {
    grid-row: span 2;
    align-self: start;
    padding-top: 4px;
  }
}

@media (min-width: 960px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 通用节奏 ---------- */
.page-contact .band {
  padding-block: clamp(52px, 7.5vw, 104px);
}

.page-contact .band--paper {
  background: var(--paper);
}

.page-contact .band--white {
  background: var(--paper-white);
}

.page-contact .band--dark {
  background: var(--ink-800);
  color: var(--on-dark-strong);
}

.page-contact .section-head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  margin-bottom: clamp(24px, 3vw, 36px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-contact .band--dark .section-head {
  border-bottom-color: var(--pc-dark-hair);
}

.page-contact .section-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-contact .band--dark .section-num {
  color: var(--cyan);
}

.page-contact .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.page-contact .band-lead {
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .band--white .band-lead,
.page-contact .band--paper .band-lead {
  color: var(--muted);
}

/* ---------- 问题分流 ---------- */
.page-contact .routing-grid {
  display: grid;
  gap: clamp(26px, 3vw, 40px);
}

.page-contact .tablist {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
}

.page-contact .tab {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

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

.page-contact .tab[aria-selected="true"] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--cyan);
}

.page-contact .tab:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-contact .tab-panel {
  margin-top: 18px;
  padding: clamp(20px, 3vw, 32px);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
}

.page-contact .tab-panel[hidden] {
  display: none;
}

.page-contact .tab-panel:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-contact .panel-lead {
  margin: 0 0 18px;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink);
}

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

.page-contact .checklist li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 10px;
  height: 10px;
  border: 1px solid var(--teal);
}

.page-contact .routing-figure {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-contact .routing-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
}

.page-contact .routing-figcap {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-contact .routing-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 准备清单 ---------- */
.page-contact .prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .prep-item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .prep-key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-contact .prep-text {
  margin: 0;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-contact .prep-item {
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: 28px;
    align-items: baseline;
  }
}

/* ---------- 处理流程 ---------- */
.page-contact .flow {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow-step {
  position: relative;
  margin-left: 5px;
  padding: 0 0 clamp(24px, 3vw, 34px) 30px;
  border-left: 1px solid var(--line);
}

.page-contact .flow-step:last-child {
  padding-bottom: 0;
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--paper);
  border: 1px solid var(--teal);
}

.page-contact .flow-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-contact .flow-title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-contact .flow-text {
  margin: 0;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .process-note {
  margin: clamp(26px, 3vw, 34px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--teal);
  background: var(--paper-white);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 合作方向 ---------- */
.page-contact .collab {
  display: grid;
  border-top: 1px solid var(--pc-dark-hair);
}

.page-contact .collab-item {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--pc-dark-hair);
}

.page-contact .collab-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .collab-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-contact .collab-text {
  margin: 0;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-contact .collab-cta {
  margin-top: clamp(26px, 3.4vw, 38px);
}

@media (min-width: 860px) {
  .page-contact .collab-item {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: 32px;
    align-items: start;
  }

  .page-contact .collab-tag {
    align-self: start;
    padding-top: 6px;
  }

  .page-contact .collab-text {
    grid-column: 2;
  }
}

/* ---------- 邮件结构 ---------- */
.page-contact .mail-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .mail-step {
  border-bottom: 1px solid var(--line);
}

.page-contact .mail-step summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
}

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

.page-contact .mail-step summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--teal);
  transition: transform var(--dur) var(--ease);
}

.page-contact .mail-step[open] summary::after {
  transform: rotate(45deg);
}

.page-contact .mail-step summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-contact .mail-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-contact .mail-step p {
  margin: 0 0 20px;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .mail-tail {
  margin: clamp(24px, 3vw, 32px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .mail-tail a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--teal);
}

.page-contact .mail-tail a:hover,
.page-contact .mail-tail a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- 地址与备案 ---------- */
.page-contact .addr-grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 24px);
}

.page-contact .addr-block {
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
}

.page-contact .addr-label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.page-contact .addr-value {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .addr-value.num {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.page-contact .addr-note {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-contact .addr-links li {
  position: relative;
  padding-left: 18px;
}

.page-contact .addr-links li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

.page-contact .addr-links a {
  font-size: 15px;
  line-height: 1.6;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .addr-links a:hover,
.page-contact .addr-links a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

@media (min-width: 780px) {
  .page-contact .addr-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-contact .addr-block--links {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-contact .addr-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 3fr) minmax(0, 4fr);
  }

  .page-contact .addr-block--links {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .tab,
  .page-contact .crumb-link,
  .page-contact .addr-links a,
  .page-contact .mail-step summary::after {
    transition: none;
  }
}
<<<END>>>