.page-contact {
  --pc-grid-line: rgba(42, 61, 92, .5);
  --pc-hairline: rgba(42, 61, 92, .7);
  --pc-cell-bg: linear-gradient(158deg, rgba(19, 28, 43, .96), rgba(11, 18, 32, .92));
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--pc-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--pc-grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(130% 100% at 10% 0%, #000 0%, rgba(0, 0, 0, .35) 46%, transparent 78%);
  mask-image: radial-gradient(130% 100% at 10% 0%, #000 0%, rgba(0, 0, 0, .35) 46%, transparent 78%);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: min(44rem, 80vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(31, 111, 235, .3), rgba(255, 90, 54, .12) 46%, transparent 72%);
  filter: blur(4px);
  pointer-events: none;
}

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

.page-contact .section-readout {
  margin: 1.1rem 0 0;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--text-dim);
}

.page-contact .section-readout span {
  color: var(--blue-400);
}

.page-contact .hero-grid {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
  margin-top: clamp(1.25rem, 3vw, 2.25rem);
  align-items: center;
}

.page-contact .hero-copy h1 {
  font-size: clamp(2rem, 7.2vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin: .75rem 0 0;
  max-width: 18ch;
}

.page-contact .hero-copy .lead {
  margin-top: 1.15rem;
  max-width: 56ch;
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.75rem;
}

.page-contact .hero-meta {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--pc-hairline);
  font-size: .9375rem;
  color: var(--text-dim);
}

.page-contact .hero-visual {
  margin: 0;
  border-radius: var(--radius-l);
}

/* ---------- 通用区块头 ---------- */
.page-contact .block-head {
  max-width: 60ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-contact .block-head h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: .6rem 0 0;
}

.page-contact .block-head .lead {
  margin-top: .9rem;
}

/* ---------- 通道总览拼贴 ---------- */
.page-contact .contact-cells {
  display: grid;
  gap: 1px;
  background: var(--pc-hairline);
  border: 1px solid var(--pc-hairline);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-contact .cell {
  --cell-accent: var(--blue-600);
  position: relative;
  background: var(--pc-cell-bg);
  padding: clamp(1.25rem, 3.4vw, 1.9rem);
  display: flex;
  flex-direction: column;
  gap: .65rem;
  min-width: 0;
}

.page-contact .cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cell-accent);
  opacity: .85;
}

.page-contact .cell--mail { --cell-accent: var(--blue-400); }
.page-contact .cell--phone { --cell-accent: var(--signal); }
.page-contact .cell--addr { --cell-accent: var(--clay); }
.page-contact .cell--hours { --cell-accent: var(--state); }

.page-contact .cell-key {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.page-contact .cell-val {
  margin: 0;
  font-size: clamp(1.05rem, 3.2vw, 1.4rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .cell--phone .cell-val {
  color: var(--signal);
  font-size: clamp(1.3rem, 4.6vw, 1.85rem);
  letter-spacing: .01em;
}

.page-contact .cell-note {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 邮箱与电话 ---------- */
.page-contact .channel-grid {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2rem);
}

.page-contact .channel {
  position: relative;
  padding: clamp(1.35rem, 4vw, 2.15rem);
  border-radius: var(--radius-l);
  background: linear-gradient(165deg, rgba(19, 28, 43, .95), rgba(11, 18, 32, .88));
  border: 1px solid var(--pc-hairline);
  overflow: hidden;
  min-width: 0;
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 111, 235, .22), transparent 68%);
  pointer-events: none;
}

.page-contact .channel--phone::after {
  background: radial-gradient(circle, rgba(255, 90, 54, .22), transparent 68%);
}

.page-contact .channel h3 {
  margin: 1rem 0 0;
  font-size: clamp(1.2rem, 3.4vw, 1.55rem);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-contact .channel p {
  margin: .85rem 0 0;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 46ch;
}

.page-contact .channel-value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1rem;
  margin-top: 1.35rem;
  padding: .85rem 1rem;
  border-radius: var(--radius-s);
  background: rgba(11, 18, 32, .7);
  border: 1px solid var(--pc-hairline);
}

.page-contact .channel-value-text {
  font-size: clamp(.95rem, 2.9vw, 1.15rem);
  color: var(--text);
  overflow-wrap: anywhere;
  flex: 1 1 12rem;
}

.page-contact .channel-note {
  margin-top: .9rem;
  font-size: .875rem;
  color: var(--text-dim);
  padding-left: .9rem;
  border-left: 2px solid var(--line);
}

/* ---------- 办公地址 ---------- */
.page-contact .address-block {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  font-style: normal;
  padding: clamp(1.25rem, 4vw, 2rem);
  border-radius: var(--radius-m);
  background: linear-gradient(120deg, rgba(184, 107, 75, .16), rgba(19, 28, 43, .9) 58%);
  border: 1px solid var(--pc-hairline);
}

.page-contact .address-line {
  font-size: clamp(1.1rem, 3.6vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
  line-height: 1.45;
}

.page-contact .address-tag {
  margin-top: .5rem;
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-contact .address-detail {
  margin-top: 1.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--pc-hairline);
}

.page-contact .address-detail summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .7rem;
  font-weight: 600;
  color: var(--text);
}

.page-contact .address-detail summary::-webkit-details-marker {
  display: none;
}

.page-contact .address-detail summary::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--ink-900);
  background: var(--signal);
  border-radius: 50%;
}

.page-contact .address-detail[open] summary::before {
  content: "–";
}

.page-contact .address-list {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
  display: grid;
  gap: .7rem;
  color: var(--text-dim);
  line-height: 1.75;
}

.page-contact .address-list li::marker {
  color: var(--blue-400);
}

/* ---------- 备案与域名 ---------- */
.page-contact .filing-list {
  margin: 0;
  border-top: 1px solid var(--pc-hairline);
}

.page-contact .filing-row {
  display: grid;
  gap: .3rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--pc-hairline);
}

.page-contact .filing-key {
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--text-dim);
}

.page-contact .filing-val {
  margin: 0;
  font-size: clamp(1rem, 3.1vw, 1.2rem);
  font-weight: 600;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .filing-row:nth-child(2) .filing-val {
  color: var(--blue-400);
}

/* ---------- 反馈建议 ---------- */
.page-contact .prepare-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-contact .link-row {
  margin-top: 1.25rem;
}

.page-contact .prep-list {
  list-style: none;
  counter-reset: prep;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-contact .prep-list li {
  counter-increment: prep;
  position: relative;
  padding-left: 3.4rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--pc-hairline);
}

.page-contact .prep-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .prep-list li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .1rem;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--signal);
  padding: .2rem .5rem;
  border: 1px solid rgba(255, 90, 54, .5);
  border-radius: var(--radius-s);
}

.page-contact .prep-title {
  margin: 0;
  font-weight: 700;
  color: var(--text);
}

.page-contact .prep-text {
  margin: .3rem 0 0;
  color: var(--text-dim);
  line-height: 1.7;
  font-size: .9375rem;
}

/* ---------- 服务时间 ---------- */
.page-contact .hours-grid {
  display: grid;
  gap: clamp(1.75rem, 4.5vw, 3rem);
  align-items: center;
}

.page-contact .hours-copy h2 {
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: .6rem 0 0;
}

.page-contact .hours-copy > p {
  margin-top: 1rem;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 54ch;
}

.page-contact .hours-bar {
  position: relative;
  height: 12px;
  margin-top: 1.75rem;
  border-radius: 999px;
  background: rgba(11, 18, 32, .85);
  border: 1px solid var(--pc-hairline);
  overflow: hidden;
}

.page-contact .hours-bar-fill {
  position: absolute;
  inset: 0 14% 0 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue-600), var(--state));
}

.page-contact .hours-scale {
  display: flex;
  justify-content: space-between;
  margin-top: .55rem;
  font-size: .8125rem;
  color: var(--text-dim);
}

.page-contact .hours-note {
  margin-top: 1.25rem;
  font-size: .9375rem;
}

.page-contact .hours-visual {
  margin: 0;
  border-radius: var(--radius-l);
}

.page-contact .back-wrap {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  text-align: center;
}

.page-contact .back-top {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.25rem;
  font-size: .875rem;
  border: 1px solid var(--pc-hairline);
  border-radius: 999px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .back-top::before {
  content: "↑";
  font-family: var(--font-mono);
  color: var(--blue-400);
}

.page-contact .back-top:hover,
.page-contact .back-top:focus-visible {
  color: var(--text);
  border-color: var(--blue-400);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .contact-cells {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .filing-row {
    grid-template-columns: 11rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }

  .page-contact .contact-cells {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-contact .cell--mail { grid-column: span 3; }
  .page-contact .cell--phone { grid-column: span 3; }
  .page-contact .cell--addr { grid-column: span 4; }
  .page-contact .cell--hours { grid-column: span 2; }

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

@media (min-width: 1100px) {
  .page-contact .prepare-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .back-top {
    transition: none;
  }
}