.page-contact {
  --co-hair: rgba(255, 255, 255, 0.10);
  --co-line: rgba(53, 227, 218, 0.22);
  --co-soft: rgba(196, 206, 224, 0.84);
  --co-ink-soft: #3D4759;
  --co-meta: #6B7488;
  background-color: var(--ink-950);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.4rem, 3.4vw, 2.2rem) clamp(2.2rem, 6vw, 4.2rem);
  border-bottom: 1px solid var(--co-line);
  background:
    radial-gradient(88% 122% at 6% -18%, rgba(53, 227, 218, 0.18), transparent 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-850) 100%);
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 104px);
}

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

.page-contact .co-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  margin-top: clamp(1.4rem, 3.6vw, 2.4rem);
}

.page-contact .co-hero h1 {
  margin: 0.7rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 5.4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.025em;
}

.page-contact .co-hero .lead {
  margin: 1rem 0 0;
  max-width: 34em;
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.85;
  color: var(--co-soft);
}

.page-contact .co-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-contact .co-fact {
  display: grid;
  grid-template-columns: 4.2rem minmax(0, 1fr);
  align-items: baseline;
  gap: 0.8rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--co-hair);
}

.page-contact .co-fact__num {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan-400);
}

.page-contact .co-fact__label {
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--co-soft);
}

/* ---------- 主体分屏 ---------- */
.page-contact .co-board {
  padding-block: clamp(2rem, 5vw, 3.6rem);
}

.page-contact .co-board__grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 1.8rem);
}

.page-contact .co-lanes-col {
  background: var(--ink-850);
  border: 1px solid var(--co-line);
  padding: clamp(1.3rem, 3.6vw, 2.4rem);
}

.page-contact .co-col-head h2,
.page-contact .co-sheet h2,
.page-contact .co-contact h2,
.page-contact .co-faq h2 {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.6vw, 1.8rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.015em;
}

.page-contact .co-lanes-figure {
  margin: 1.3rem 0 1.2rem;
}

.page-contact .co-lanes-figure .media {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 3 / 4;
  margin: 0;
}

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

.page-contact .co-lanes {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .co-lane {
  border-top: 1px solid var(--co-hair);
}

.page-contact .co-lane:last-child {
  border-bottom: 1px solid var(--co-hair);
}

.page-contact .co-lane__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  padding: 1.05rem 2rem 1.05rem 0;
  position: relative;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-lane__summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--cyan-400);
  transition: transform 220ms var(--ease);
}

.page-contact .co-lane__details[open] .co-lane__summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-contact .co-lane__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-contact .co-lane__name {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--white);
}

.page-contact .co-lane__body {
  padding-bottom: 1.2rem;
}

.page-contact .co-lane__body > p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--co-soft);
}

.page-contact .co-lane__fit {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.page-contact .co-lane__fit li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--cyan-150);
}

.page-contact .co-lane__fit li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  background: var(--cyan-400);
}

.page-contact .co-lane__summary:focus-visible,
.page-contact .co-q summary:focus-visible,
.page-contact .co-links a:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

/* ---------- 右侧纸张区 ---------- */
.page-contact .co-sheets {
  display: grid;
  align-content: start;
  gap: clamp(1rem, 2.6vw, 1.4rem);
}

.page-contact .co-sheet {
  position: relative;
  background: var(--paper-100);
  border: 1px solid var(--paper-300);
  padding: clamp(1.1rem, 3vw, 1.9rem);
  color: var(--paper-ink);
  box-shadow: 6px 6px 0 rgba(27, 36, 54, 0.10);
}

.page-contact .co-sheet h2 {
  color: var(--paper-ink);
}

.page-contact .co-sheet .mono-label {
  color: #5C6478;
}

.page-contact .co-sheet .media {
  margin: 1.2rem 0 0;
}

.page-contact .co-sheet .media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 流程 */
.page-contact .co-flow {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}

.page-contact .co-flow__node {
  position: relative;
  padding-left: 2.5rem;
}

.page-contact .co-flow__node::before {
  content: "";
  position: absolute;
  left: 0.72rem;
  top: 1.8rem;
  bottom: -1.15rem;
  width: 1px;
  background: var(--paper-300);
}

.page-contact .co-flow__node:last-child::before {
  content: none;
}

.page-contact .co-flow__step {
  position: absolute;
  left: 0;
  top: 0;
  width: 1.44rem;
  height: 1.44rem;
  border: 1px solid #9AA2B2;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  line-height: 1;
  color: var(--ink-950);
  background: var(--paper-100);
}

.page-contact .co-flow h3,
.page-contact .co-kit h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-ink);
}

.page-contact .co-flow p {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--co-ink-soft);
}

.page-contact .co-flow .co-flow__meta {
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--co-meta);
}

/* 材料清单 */
.page-contact .co-kit {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-contact .co-kit__item {
  display: grid;
  grid-template-columns: 1.1rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
}

.page-contact .co-kit__box {
  position: relative;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.28rem;
  border: 1px solid #9AA2B2;
  background: var(--white);
}

.page-contact .co-kit__box::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--cyan-400);
}

.page-contact .co-kit p {
  margin: 0.3rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--co-ink-soft);
}

/* ---------- 联系条 ---------- */
.page-contact .co-contact {
  position: relative;
  padding-block: clamp(2rem, 5vw, 3.4rem);
  border-top: 1px solid var(--co-line);
  background: linear-gradient(180deg, var(--ink-850) 0%, var(--ink-950) 100%);
}

.page-contact .co-contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(22%, 240px);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-400) 0%, var(--orange-500) 100%);
}

.page-contact .co-contact__note {
  margin: 0.8rem 0 0;
  max-width: 36em;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--co-soft);
}

.page-contact .co-contact__list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-contact .co-contact__cell {
  display: grid;
  gap: 0.45rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--co-hair);
  background: rgba(11, 18, 32, 0.55);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-contact .co-contact__cell:hover {
  border-color: rgba(53, 227, 218, 0.45);
  background: rgba(16, 27, 46, 0.9);
}

.page-contact .co-contact__k {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.page-contact .co-contact__v {
  display: block;
  font-family: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: clamp(0.8rem, 2.4vw, 0.98rem);
  line-height: 1.55;
  color: var(--cyan-150);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  text-decoration-color: rgba(53, 227, 218, 0.32);
  word-break: break-word;
  transition: color 200ms var(--ease), text-decoration-color 200ms var(--ease);
}

.page-contact .co-contact__v--text {
  font-family: var(--font-body);
  letter-spacing: 0.01em;
  font-size: clamp(0.88rem, 2.4vw, 1rem);
}

.page-contact .co-contact__cell:hover .co-contact__v {
  color: var(--white);
  text-decoration-color: var(--orange-500);
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  padding-block: clamp(2rem, 5vw, 3.4rem) clamp(2.6rem, 7vw, 4.6rem);
  background: var(--ink-950);
}

.page-contact .co-faq__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
}

.page-contact .co-faq__lead {
  margin: 0.9rem 0 0;
  max-width: 30em;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--co-soft);
}

.page-contact .co-links {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-contact .co-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 2px;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--cyan-150);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .co-links a::before {
  content: "→";
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan-400);
}

.page-contact .co-links a:hover {
  color: var(--white);
  border-bottom-color: var(--orange-500);
}

.page-contact .co-q {
  border-top: 1px solid var(--co-hair);
}

.page-contact .co-q:last-child {
  border-bottom: 1px solid var(--co-hair);
}

.page-contact .co-q summary {
  position: relative;
  padding: 1rem 2.2rem 1rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

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

.page-contact .co-q summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--cyan-400);
  transition: transform 220ms var(--ease);
}

.page-contact .co-q[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-contact .co-q__body p {
  margin: 0 0 1.1rem;
  max-width: 36em;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--co-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-contact .co-lanes-figure .media {
    max-width: 340px;
  }

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

@media (min-width: 780px) {
  .page-contact .co-contact__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-contact .co-board__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 0;
    align-items: stretch;
  }

  .page-contact .co-sheets {
    background: var(--paper-100);
    padding: clamp(1.6rem, 3vw, 2.6rem);
    gap: clamp(1.5rem, 3vw, 2.2rem);
  }

  .page-contact .co-faq__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 3.4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-lane__summary::after,
  .page-contact .co-q summary::after,
  .page-contact .co-contact__cell,
  .page-contact .co-contact__v,
  .page-contact .co-links a {
    transition: none;
  }
}
<<<END>>>