.page-contact {
  --pc-gap: clamp(22px, 3.6vw, 52px);
  --pc-pad: clamp(20px, 3vw, 34px);
  --pc-soft: rgba(244, 247, 248, 0.78);
  --pc-faint: rgba(244, 247, 248, 0.52);
  --pc-hair: rgba(30, 74, 102, 0.85);
  --pc-card: linear-gradient(155deg, rgba(14, 47, 79, 0.95), rgba(7, 26, 47, 0.98));
  position: relative;
  overflow-x: clip;
  padding-bottom: clamp(36px, 5vw, 72px);
  color: var(--white);
  background:
    radial-gradient(92% 56% at 88% -8%, rgba(39, 225, 210, 0.13), transparent 62%),
    radial-gradient(74% 52% at -12% 38%, rgba(255, 107, 61, 0.09), transparent 60%),
    var(--navy);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  margin: 0 0 clamp(18px, 3vw, 30px);
}
.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--pc-faint);
}
.page-contact .breadcrumb-list a {
  color: var(--cyan);
  text-decoration: none;
}
.page-contact .breadcrumb-list a:hover,
.page-contact .breadcrumb-list a:focus-visible {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(20px, 3vw, 38px) 0 clamp(34px, 5.5vw, 76px);
}
.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
}
.page-contact .contact-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-contact .contact-mega {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(52px, 12.5vw, 148px);
  line-height: 0.86;
  letter-spacing: -0.045em;
  color: var(--white);
}
.page-contact .contact-mega span {
  color: var(--cyan);
  text-shadow: 0 0 46px rgba(39, 225, 210, 0.42);
}
.page-contact .contact-lede {
  max-width: 36ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--pc-soft);
}

.page-contact .contact-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .contact-jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--pc-hair);
  color: var(--pc-soft);
  text-decoration: none;
  font-size: 13px;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-contact .contact-jump a .mono {
  font-size: 11px;
  color: var(--cyan);
}
.page-contact .contact-jump a:hover,
.page-contact .contact-jump a:focus-visible {
  border-color: var(--cyan);
  background: rgba(39, 225, 210, 0.09);
  color: var(--white);
}

.page-contact .contact-visual-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-contact .contact-visual {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--navy-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}
.page-contact .contact-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 26, 47, 0.06) 0%, rgba(7, 26, 47, 0.62) 100%);
}
.page-contact .contact-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.page-contact .contact-status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--pc-soft);
  background: rgba(14, 47, 79, 0.7);
  border-left: 2px solid var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-contact .contact-channels,
.page-contact .contact-prep,
.page-contact .contact-collab,
.page-contact .contact-hours {
  padding: clamp(30px, 5vw, 64px) 0;
}
.page-contact .contact-sec-head {
  display: grid;
  gap: 10px;
  max-width: 700px;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-contact .section-index {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}
.page-contact .contact-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--white);
}
.page-contact .contact-sec-lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 1.8;
  color: var(--pc-soft);
}
.page-contact a {
  color: var(--cyan);
}

/* ---------- 渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--pc-pad);
  background: var(--pc-card);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  overflow: hidden;
}
.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 62px;
  height: 3px;
  background: var(--cyan);
}
.page-contact .channel-card-main::before {
  width: 128px;
  background: var(--orange);
}
.page-contact .channel-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}
.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.6vw, 24px);
  line-height: 1.35;
  color: var(--white);
  text-decoration: none;
  overflow-wrap: anywhere;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-contact a.channel-value:hover,
.page-contact a.channel-value:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-contact .channel-value-plain {
  font-size: clamp(15px, 2.1vw, 19px);
}
.page-contact .channel-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--pc-soft);
}
.page-contact .channel-meta {
  display: grid;
  gap: 6px;
  margin: 4px 0 0;
  padding: 10px 0 0;
  list-style: none;
  border-top: 1px solid var(--pc-hair);
  font-size: 13px;
  color: var(--pc-soft);
}
.page-contact .channel-meta .mono {
  display: inline-block;
  min-width: 44px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--pc-faint);
}

/* ---------- 反馈清单 ---------- */
.page-contact .contact-prep-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
}
.page-contact .contact-prep-copy > .section-index {
  display: block;
  margin-bottom: 10px;
}
.page-contact .checklist {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .check-item {
  position: relative;
}
.page-contact .check-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}
.page-contact .check-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--pc-hair);
  cursor: pointer;
  transition: background 0.2s var(--ease);
}
.page-contact .check-label:hover {
  background: rgba(39, 225, 210, 0.05);
}
.page-contact .check-box {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(39, 225, 210, 0.05);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-contact .check-input:checked + .check-label .check-box {
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-contact .check-input:checked + .check-label .check-box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
}
.page-contact .check-input:focus-visible + .check-label {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-contact .check-no {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}
.page-contact .check-text {
  font-size: 15px;
  line-height: 1.65;
  color: var(--pc-soft);
}
.page-contact .check-input:checked + .check-label .check-text {
  color: var(--white);
}

.page-contact .contact-prep-visual {
  margin: 0;
  align-self: start;
  overflow: hidden;
  background: var(--navy-2);
  clip-path: polygon(0 30px, 30px 0, 100% 0, 100% 100%, 0 100%);
}
.page-contact .contact-prep-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-contact .contact-prep-cap {
  display: block;
  padding: 12px 16px;
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--pc-faint);
  border-top: 1px solid var(--pc-hair);
}

/* ---------- 合作 ---------- */
.page-contact .topic-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .topic-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(14px, 2vw, 20px) 0;
  border-top: 1px solid var(--pc-hair);
}
.page-contact .topic-row:last-child {
  border-bottom: 1px solid var(--pc-hair);
}
.page-contact .topic-tag {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}
.page-contact .topic-body {
  display: grid;
  gap: 5px;
}
.page-contact .topic-body strong {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}
.page-contact .topic-body span {
  font-size: 14px;
  line-height: 1.75;
  color: var(--pc-soft);
}

/* ---------- 回复时间 ---------- */
.page-contact .hours-panel {
  position: relative;
  padding: var(--pc-pad);
  background: linear-gradient(142deg, rgba(14, 47, 79, 0.92), rgba(7, 26, 47, 0.98));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}
.page-contact .hours-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 72px;
  background: var(--orange);
}
.page-contact .hours-head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(16px, 2.5vw, 24px);
}
.page-contact .hours-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .hours-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "dot key"
    "dot text";
  gap: 3px 10px;
  padding: 14px 0;
  border-top: 1px solid var(--pc-hair);
}
.page-contact .hours-row .state-dot {
  grid-area: dot;
  margin-top: 7px;
}
.page-contact .hours-key {
  grid-area: key;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}
.page-contact .hours-text {
  grid-area: text;
  font-size: 14px;
  line-height: 1.75;
  color: var(--pc-soft);
}
.page-contact .hours-note {
  margin: clamp(16px, 2.5vw, 22px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--pc-hair);
  font-size: 13px;
  line-height: 1.75;
  color: var(--pc-faint);
}

/* ---------- 登记信息 ---------- */
.page-contact .contact-reg {
  padding: clamp(28px, 4vw, 48px) 0 0;
}
.page-contact .contact-reg::before {
  content: "";
  display: block;
  height: 10px;
  margin-bottom: clamp(18px, 3vw, 26px);
  background: repeating-linear-gradient(115deg, rgba(39, 225, 210, 0.55) 0 2px, transparent 2px 14px);
  border-top: 1px solid var(--pc-hair);
}
.page-contact .reg-title {
  font-size: clamp(19px, 2.4vw, 24px);
  margin-bottom: clamp(12px, 2vw, 18px);
}
.page-contact .reg-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .reg-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(30, 74, 102, 0.6);
  font-size: 14px;
}
.page-contact .reg-key {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--pc-faint);
  padding-top: 3px;
}
.page-contact .reg-val {
  color: var(--white);
  overflow-wrap: anywhere;
}
.page-contact .reg-note {
  margin: clamp(16px, 2.5vw, 22px) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--pc-faint);
}
.page-contact .back-to-top {
  display: inline-block;
  margin-top: clamp(20px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--cyan);
  border-bottom: 1px solid rgba(39, 225, 210, 0.45);
  padding-bottom: 2px;
}
.page-contact .back-to-top:hover,
.page-contact .back-to-top:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-contact .channel-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    grid-template-areas:
      "mail tel"
      "mail addr";
  }
  .page-contact .channel-card-main { grid-area: mail; }
  .page-contact .channel-card-tel { grid-area: tel; }
  .page-contact .channel-card-addr { grid-area: addr; }

  .page-contact .topic-row {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }
  .page-contact .reg-row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(28px, 4vw, 64px);
  }
  .page-contact .contact-prep-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(28px, 4vw, 60px);
  }
  .page-contact .hours-row {
    grid-template-columns: auto 190px minmax(0, 1fr);
    grid-template-areas: "dot key text";
    align-items: baseline;
  }
  .page-contact .hours-row .state-dot {
    margin-top: 0;
  }
  .page-contact .hours-key {
    padding-top: 1px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-jump a,
  .page-contact .check-label,
  .page-contact .check-box,
  .page-contact a.channel-value {
    transition: none;
  }
}
<<<END>>>