/* =====================================================
   联系与范围 · page-contact
   ===================================================== */

.page-contact {
  --pc-rim: rgba(230,233,239,.13);
  --pc-rim-strong: rgba(230,233,239,.3);
  --pc-gap: clamp(14px, 2.2vw, 24px);
  --pc-cyan-soft: #7ed8bf;
  --pc-soft-text: rgba(230,233,239,.82);
  background:
    radial-gradient(88% 52% at 88% -6%, rgba(63,169,142,.13), transparent 62%),
    var(--c-ink);
  color: var(--c-text);
  overflow-x: clip;
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-contact .section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-celadon);
  margin: 0;
  text-transform: uppercase;
}

.page-contact .section-title {
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.015em;
  color: var(--c-text);
  margin: 10px 0 0;
}

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

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--c-muted);
}

.page-contact .breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--c-line-2);
}

.page-contact .breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-contact .breadcrumb a:hover {
  color: var(--c-signal-soft);
  border-bottom-color: currentColor;
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--c-text);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 34px) clamp(22px, 3.4vw, 38px);
  overflow: hidden;
  isolation: isolate;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: -22%;
  width: 70%;
  height: 100%;
  background: linear-gradient(120deg, rgba(255,122,41,.15), rgba(63,169,142,.08) 55%, transparent 86%);
  clip-path: polygon(0 0, 72% 0, 40% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

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

.page-contact .contact-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(27px, 4.6vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.025em;
  color: var(--c-text);
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-contact .contact-hero .lead {
  max-width: 44ch;
  margin: clamp(14px, 1.8vw, 20px) 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--pc-soft-text);
}

/* ---------- 信息条 ---------- */
.page-contact .contact-band {
  position: relative;
  margin: 0 0 clamp(30px, 4.4vw, 52px);
  border: 1px solid var(--pc-rim);
  border-radius: var(--radius);
  background: var(--c-plate);
  overflow: hidden;
}

.page-contact .contact-band img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: .68;
}

.page-contact .contact-band-caption {
  position: absolute;
  inset: auto 0 0 0;
  margin: 0;
  padding: clamp(16px, 2.6vw, 28px) clamp(16px, 2.6vw, 30px) clamp(12px, 1.8vw, 20px);
  background: linear-gradient(180deg, rgba(14,27,51,0), rgba(14,27,51,.94) 62%);
  font-family: var(--font-mono);
  font-size: clamp(11.5px, 1.1vw, 13px);
  letter-spacing: .05em;
  line-height: 1.6;
  color: var(--c-signal-soft);
}

/* ---------- 三栏联系卡片 ---------- */
.page-contact .channels-section {
  margin-bottom: clamp(38px, 6vw, 72px);
}

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

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 26px) clamp(18px, 2.2vw, 24px);
  background: var(--c-plate);
  border: 1px solid var(--pc-rim);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-contact .channel-card:hover {
  border-color: var(--pc-rim-strong);
  transform: translateY(-2px);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--c-line-2);
}

.page-contact .channel-card--mail::before { background: var(--c-signal); }
.page-contact .channel-card--phone::before { background: var(--c-celadon); }
.page-contact .channel-card--addr::before { background: var(--c-paper-line); }

.page-contact .channel-card .card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-contact .channel-card .card-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-muted);
}

.page-contact .tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  line-height: 1.5;
  border: 1px solid var(--c-line-2);
  border-radius: 999px;
  color: var(--c-muted);
  white-space: nowrap;
}

.page-contact .tag--signal {
  border-color: rgba(255,122,41,.55);
  color: var(--c-signal-soft);
}

.page-contact .tag--celadon {
  border-color: rgba(63,169,142,.55);
  color: var(--pc-cyan-soft);
}

.page-contact .tag--paper {
  border-color: var(--c-paper-line);
  color: var(--c-archive);
}

.page-contact .channel-card .card-title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--c-text);
  margin: 0;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(13.5px, 1.4vw, 15.5px);
  line-height: 1.7;
  letter-spacing: .01em;
  margin: 0;
  padding: 11px 13px;
  background: rgba(14,27,51,.72);
  border: 1px dashed var(--c-line-2);
  border-radius: var(--radius);
  color: var(--c-text);
  word-break: break-word;
  user-select: all;
}

.page-contact .channel-card--mail .channel-value {
  color: var(--c-signal-soft);
  border-color: rgba(255,122,41,.42);
}

.page-contact .channel-card--phone .channel-value {
  color: var(--pc-cyan-soft);
  border-color: rgba(63,169,142,.42);
}

.page-contact .channel-value--plain {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--c-archive);
  border-color: rgba(201,195,182,.45);
}

.page-contact .channel-card .card-divider {
  height: 1px;
  background: var(--pc-rim);
  margin: 2px 0 0;
}

.page-contact .channel-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 服务范围 ---------- */
.page-contact .scope {
  position: relative;
  margin-bottom: clamp(38px, 6vw, 72px);
  padding-block: clamp(32px, 5vw, 58px);
  border-top: 1px solid var(--pc-rim);
  border-bottom: 1px solid var(--pc-rim);
  background:
    linear-gradient(90deg, rgba(63,169,142,.06) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(0deg, rgba(63,169,142,.06) 1px, transparent 1px) 0 0 / 56px 56px,
    rgba(22,37,63,.72);
}

.page-contact .scope-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-contact .scope-intro {
  margin: clamp(14px, 1.8vw, 18px) 0 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pc-soft-text);
  max-width: 46ch;
}

.page-contact .scope-tier {
  list-style: none;
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .tier {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 15px 16px;
  background: rgba(14,27,51,.6);
  border: 1px solid var(--pc-rim);
  border-left: 3px solid var(--c-celadon);
  border-radius: var(--radius);
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .tier--ring { border-left-color: var(--c-signal); }
.page-contact .tier--remote { border-left-color: var(--c-paper-line); }

.page-contact .tier:hover,
.page-contact .tier:focus-within {
  background: rgba(29,46,76,.82);
  border-color: var(--pc-rim-strong);
}

.page-contact .tier-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-celadon);
  padding-top: 3px;
}

.page-contact .tier--ring .tier-code { color: var(--c-signal-soft); }
.page-contact .tier--remote .tier-code { color: var(--c-paper-line); }

.page-contact .tier-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
}

.page-contact .tier-desc {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-contact .scope-figure {
  margin: 0;
}

.page-contact .scope-figure-media {
  position: relative;
  border: 1px solid var(--pc-rim);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-ink);
}

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

.page-contact .scope-figure-caption {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 需求对接 ---------- */
.page-contact .demand {
  margin-bottom: clamp(38px, 6vw, 72px);
}

.page-contact .demand-intro {
  margin: clamp(14px, 1.8vw, 18px) 0 clamp(22px, 3vw, 32px);
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pc-soft-text);
  max-width: 50ch;
}

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

.page-contact .demand-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.4vw, 26px);
  background: var(--c-plate);
  border: 1px solid var(--pc-rim);
  border-top: 2px solid var(--c-line-2);
  border-radius: var(--radius);
  transition: border-top-color 200ms var(--ease);
}

.page-contact .demand-item:hover {
  border-top-color: var(--c-celadon);
}

.page-contact .demand-item:nth-child(1):hover { border-top-color: var(--c-signal); }
.page-contact .demand-item:nth-child(3):hover { border-top-color: var(--c-paper-line); }

.page-contact .demand-item .tag {
  align-self: flex-start;
}

.page-contact .demand-title {
  margin: 4px 0 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
}

.page-contact .demand-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--pc-soft-text);
}

.page-contact .demand-subject {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--pc-rim);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--c-signal-soft);
  word-break: break-word;
}

/* ---------- 联系前准备 ---------- */
.page-contact .prep {
  margin-bottom: clamp(38px, 6vw, 72px);
}

.page-contact .prep-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-contact .prep-intro {
  margin: clamp(14px, 1.8vw, 18px) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pc-soft-text);
  max-width: 40ch;
}

.page-contact .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--pc-rim);
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: clamp(16px, 2vw, 22px) 0;
  border-bottom: 1px solid var(--pc-rim);
}

.page-contact .prep-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-celadon);
  padding-top: 3px;
}

.page-contact .prep-name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--c-text);
}

.page-contact .prep-desc {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 自助入口 ---------- */
.page-contact .assist-intro {
  margin: clamp(14px, 1.8vw, 18px) 0 clamp(22px, 3vw, 30px);
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pc-soft-text);
  max-width: 52ch;
}

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

.page-contact .assist-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.2vw, 24px);
  background: rgba(22,37,63,.7);
  border: 1px solid var(--pc-rim);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-contact .assist-card:hover,
.page-contact .assist-card:focus-visible {
  border-color: rgba(63,169,142,.6);
  background: rgba(29,46,76,.9);
}

.page-contact .assist-code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-muted);
}

.page-contact .assist-card h3 {
  margin: 4px 0 0;
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 600;
  color: var(--c-text);
}

.page-contact .assist-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .assist-go {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-celadon);
}

.page-contact .assist-card:hover .assist-go {
  color: var(--c-signal-soft);
}

.page-contact .assist-back {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--pc-soft-text);
}

.page-contact .assist-back a {
  color: var(--c-signal-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,178,122,.5);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-contact .assist-back a:hover {
  color: var(--c-signal);
  border-bottom-color: var(--c-signal);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-contact .channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-card--addr {
    grid-column: 1 / -1;
  }

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

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

  .page-contact .prep-inner {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .channel-card--addr {
    grid-column: auto;
  }

  .page-contact .scope-inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }

  .page-contact .scope-figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

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

  .page-contact .assist-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .demand-intro,
  .page-contact .assist-intro {
    max-width: 58ch;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .tier,
  .page-contact .demand-item,
  .page-contact .assist-card,
  .page-contact .breadcrumb a,
  .page-contact .assist-back a {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}
<<<END>>>