.page-contact {
  --c-line: rgba(53, 224, 214, .18);
  --c-line-soft: rgba(53, 224, 214, .10);
  position: relative;
  isolation: isolate;
  display: block;
  background-color: var(--sea-900);
  background-image:
    radial-gradient(760px 460px at 12% -6%, rgba(53, 224, 214, .15), transparent 68%),
    radial-gradient(620px 420px at 92% 4%, rgba(255, 107, 74, .09), transparent 70%);
  background-repeat: no-repeat;
  color: var(--ink-100);
}

/* ---------- 首屏 ---------- */
.page-contact .c-hero {
  padding: 30px 0 46px;
}

.page-contact .c-hero-grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-contact .c-hero-main {
  max-width: 40ch;
}

.page-contact .c-hero-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.35rem, 11vw, 5rem);
  line-height: 1.02;
  letter-spacing: .02em;
  color: var(--paper-000);
}

.page-contact .c-hero-lead {
  margin: 18px 0 0;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ink-200);
}

.page-contact .c-hero-facts {
  list-style: none;
  margin: 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--c-line-soft);
  display: grid;
  gap: 16px;
}

.page-contact .c-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-contact .c-hero-facts .mono {
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .04em;
  color: var(--cyan-400);
  word-break: break-all;
}

.page-contact .c-hero-facts em {
  font-style: normal;
  font-size: .8rem;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */
.page-contact .c-section {
  padding: 44px 0 12px;
  scroll-margin-top: 120px;
}

.page-contact .c-head {
  display: grid;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--c-line-soft);
  margin-bottom: 26px;
}

.page-contact .c-num {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .2em;
  color: var(--cyan-400);
}

.page-contact .c-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 5.4vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: .01em;
  color: var(--paper-000);
}

.page-contact .c-sub {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--ink-200);
}

/* ---------- 渠道卡片 ---------- */
.page-contact .c-channel-grid {
  display: grid;
  gap: 18px;
}

.page-contact .c-channel {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--glass);
  border: 1px solid var(--line-glass);
  backdrop-filter: blur(8px);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  min-width: 0;
}

.page-contact .c-channel-dot {
  position: absolute;
  top: 20px;
  right: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 4px rgba(53, 224, 214, .14);
}

.page-contact .c-channel-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .2em;
  color: var(--slate-500);
}

.page-contact .c-channel-name {
  margin: 10px 0 0;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--paper-000);
}

.page-contact .c-channel-value {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: .9rem;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--cyan-400);
  word-break: break-all;
}

.page-contact .c-channel-desc {
  margin: 16px 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--ink-200);
}

.page-contact .copy-btn {
  display: inline-flex;
  align-items: center;
  margin-top: 16px;
  padding: 8px 15px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .09em;
  color: var(--cyan-400);
  background: rgba(53, 224, 214, .08);
  border: 1px solid var(--line-glass);
  cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-contact .copy-btn:hover {
  background: rgba(53, 224, 214, .2);
}

.page-contact .copy-btn:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .copy-btn[data-copied="true"] {
  color: var(--ink-950);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

/* ---------- 反馈类型切换 ---------- */
.page-contact .c-fb {
  position: relative;
}

.page-contact .c-fb-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .c-fb-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-contact .c-fb-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--ink-200);
  background: var(--glass-soft);
  border: 1px solid var(--line-glass);
  cursor: pointer;
  white-space: nowrap;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-contact .c-fb-tab .mono {
  color: var(--slate-500);
  transition: color .22s var(--ease);
}

.page-contact #cfb-1:checked ~ .c-fb-tabs label[for="cfb-1"],
.page-contact #cfb-2:checked ~ .c-fb-tabs label[for="cfb-2"],
.page-contact #cfb-3:checked ~ .c-fb-tabs label[for="cfb-3"],
.page-contact #cfb-4:checked ~ .c-fb-tabs label[for="cfb-4"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
}

.page-contact #cfb-1:checked ~ .c-fb-tabs label[for="cfb-1"] .mono,
.page-contact #cfb-2:checked ~ .c-fb-tabs label[for="cfb-2"] .mono,
.page-contact #cfb-3:checked ~ .c-fb-tabs label[for="cfb-3"] .mono,
.page-contact #cfb-4:checked ~ .c-fb-tabs label[for="cfb-4"] .mono {
  color: rgba(4, 18, 28, .62);
}

.page-contact .c-fb-radio:focus-visible ~ .c-fb-tabs label[for="cfb-1"] {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .c-fb-panels {
  margin-top: 20px;
}

.page-contact .c-fb-panel {
  display: none;
}

.page-contact #cfb-1:checked ~ .c-fb-panels .c-fb-panel[data-panel="1"],
.page-contact #cfb-2:checked ~ .c-fb-panels .c-fb-panel[data-panel="2"],
.page-contact #cfb-3:checked ~ .c-fb-panels .c-fb-panel[data-panel="3"],
.page-contact #cfb-4:checked ~ .c-fb-panels .c-fb-panel[data-panel="4"] {
  display: block;
}

.page-contact .c-fb-inner {
  display: grid;
  gap: 22px;
  padding: 24px 22px 26px;
  background: var(--paper-050);
  color: var(--sea-900);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-contact .c-fb-title {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--sea-900);
}

.page-contact .c-fb-text {
  margin: 12px 0 0;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--sea-700);
}

.page-contact .c-fb-label {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--cyan-700);
}

.page-contact .c-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .c-list li {
  position: relative;
  padding-left: 19px;
  font-size: .93rem;
  line-height: 1.7;
  color: var(--sea-700);
}

.page-contact .c-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--cyan-700);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.page-contact .c-fb-aside {
  padding: 18px 18px 20px;
  background: var(--paper-000);
  border-left: 3px solid var(--coral-500);
}

.page-contact .c-fb-aside-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--coral-500);
}

.page-contact .c-fb-aside-text {
  margin: 10px 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--sea-700);
}

/* ---------- 自检清单 ---------- */
.page-contact .c-check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .c-check {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 15px 17px;
  background: var(--glass-soft);
  border: 1px solid var(--c-line-soft);
  cursor: pointer;
  transition: border-color .22s var(--ease), background .22s var(--ease);
}

.page-contact .c-check:hover {
  border-color: var(--line-glass);
  background: var(--glass);
}

.page-contact .c-check-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.page-contact .c-check-mark {
  flex: 0 0 auto;
  width: 19px;
  height: 19px;
  margin-top: 1px;
  display: grid;
  place-items: center;
  background: rgba(4, 18, 28, .55);
  border: 1px solid var(--line-glass);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .c-check-mark::after {
  content: "";
  width: 9px;
  height: 5px;
  margin-top: -3px;
  border-left: 2px solid var(--ink-950);
  border-bottom: 2px solid var(--ink-950);
  transform: rotate(-45deg) scale(0);
  transition: transform .18s var(--ease);
}

.page-contact .c-check-input:checked ~ .c-check-mark {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-contact .c-check-input:checked ~ .c-check-mark::after {
  transform: rotate(-45deg) scale(1);
}

.page-contact .c-check-input:focus-visible ~ .c-check-mark {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .c-check-text {
  font-size: .95rem;
  line-height: 1.65;
  color: var(--ink-100);
  transition: color .2s var(--ease);
}

.page-contact .c-check-input:checked ~ .c-check-text {
  color: var(--muted);
}

/* ---------- 处理节奏 ---------- */
.page-contact .c-figure {
  margin: 0 0 22px;
  background: var(--sea-800);
  border: 1px solid var(--c-line-soft);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

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

.page-contact .c-steps {
  display: grid;
  gap: 16px;
}

.page-contact .c-step {
  padding: 20px 20px 22px;
  background: var(--glass);
  border: 1px solid var(--c-line-soft);
  border-top: 2px solid var(--cyan-400);
}

.page-contact .c-step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--amber-300);
}

.page-contact .c-step-title {
  margin: 10px 0 0;
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--paper-000);
}

.page-contact .c-step-text {
  margin: 10px 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--ink-200);
}

.page-contact .action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 22px;
}

/* ---------- 常见情形 ---------- */
.page-contact .c-examples {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .c-example {
  padding: 18px 20px 20px;
  background: var(--glass-soft);
  border-left: 2px solid var(--cyan-400);
}

.page-contact .c-example-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--cyan-400);
}

.page-contact .c-example p {
  margin: 10px 0 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--ink-100);
}

/* ---------- 在线时段 ---------- */
.page-contact .c-hours {
  position: relative;
  display: grid;
  gap: 20px;
  padding: 24px 22px 26px;
  background: var(--glass);
  border: 1px solid var(--line-glass);
  backdrop-filter: blur(8px);
}

.page-contact .c-hours-dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: var(--coral-500);
}

.page-contact .c-hours-title {
  margin: 0;
  font-size: clamp(1.3rem, 4.6vw, 1.7rem);
  font-weight: 700;
  color: var(--paper-000);
}

.page-contact .c-hours-text {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--ink-200);
}

.page-contact .c-hours-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

/* ---------- 地域与备案 ---------- */
.page-contact .c-region {
  display: grid;
  gap: 22px;
  padding: 24px 22px 26px;
  background: var(--glass);
  border: 1px solid var(--c-line-soft);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-contact .c-region-list {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-contact .c-region-row {
  display: grid;
  gap: 5px;
}

.page-contact .c-region-row dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--slate-500);
}

.page-contact .c-region-row dd {
  margin: 0;
  font-size: .97rem;
  line-height: 1.7;
  color: var(--ink-100);
  word-break: break-all;
}

.page-contact .c-region-note {
  margin: 18px 0 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .c-region-note a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .c-region-figure {
  margin: 0;
  border: 1px solid var(--c-line-soft);
  overflow: hidden;
  background: var(--sea-800);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .c-hero {
    padding: 40px 0 56px;
  }

  .page-contact .c-section {
    padding: 54px 0 14px;
  }

  .page-contact .c-check-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
  }
}

@media (min-width: 820px) {
  .page-contact .c-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 46px;
    align-items: end;
  }

  .page-contact .c-channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .c-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .c-examples {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .c-fb-inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 34px;
    padding: 30px 28px 32px;
  }

  .page-contact .c-hours {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 30px;
    padding: 30px 28px 32px;
  }

  .page-contact .c-hours-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

@media (min-width: 1024px) {
  .page-contact .c-region {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: stretch;
    gap: 32px;
    padding: 30px 28px 32px;
  }

  .page-contact .c-region-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 28px;
  }

  .page-contact .c-region-row:first-child {
    grid-column: 1 / -1;
  }
}
<<<END>>>