.page-contact {
  --pc-card-pad: 20px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: 26px 0 10px;
}

.page-contact .contact-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(28px, 7vw, 46px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-contact .hero-lead {
  max-width: 66ch;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .hero-meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .hero-meta li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 12px 16px;
  background: var(--deep);
  border: 1px solid var(--grid-soft);
  border-radius: var(--radius-sm);
}

.page-contact .hero-meta .label {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.page-contact .hero-meta .num {
  color: var(--white);
  font-size: 15px;
  font-weight: 700;
  word-break: break-all;
}

/* ---------- 渠道区 ---------- */
.page-contact .channels {
  display: grid;
  gap: 24px;
}

.page-contact .channel-stack {
  display: grid;
  gap: 16px;
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  align-items: stretch;
  background: var(--deep);
  border: 1px solid var(--grid-soft);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--dim);
  transform: translateY(-2px);
}

.page-contact .channel-bar {
  flex: 0 0 5px;
  align-self: stretch;
}

.page-contact .channel-bar-blue {
  background: linear-gradient(180deg, var(--blue), rgba(47, 139, 255, 0.15));
}

.page-contact .channel-bar-gold {
  background: linear-gradient(180deg, var(--gold), rgba(242, 180, 65, 0.15));
}

.page-contact .channel-bar-green {
  background: linear-gradient(180deg, var(--green), rgba(39, 192, 138, 0.15));
}

.page-contact .channel-body {
  padding: var(--pc-card-pad);
  min-width: 0;
}

.page-contact .channel-body .label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .channel-value {
  margin: 8px 0 10px;
  color: var(--white);
  font-size: clamp(16px, 4.4vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  word-break: break-all;
}

.page-contact .channel-body > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-contact .channel-aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .channel-aside .figure {
  margin: 0;
}

.page-contact .channel-aside .figure-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--grid-soft);
}

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

.page-contact .aside-note {
  margin: 0;
  padding: 14px 16px;
  border: 1px dashed var(--grid);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

/* ---------- 双栏主体 ---------- */
.page-contact .contact-body {
  padding-top: 8px;
}

.page-contact .contact-layout {
  display: grid;
  gap: 28px;
}

.page-contact .contact-rail {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .rail-card {
  padding: 20px;
  background: var(--deep);
  border: 1px solid var(--grid-soft);
  border-radius: var(--radius);
}

.page-contact .rail-card-quiet {
  background: rgba(18, 35, 60, 0.55);
  border-style: dashed;
}

.page-contact .rail-title {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.page-contact .rail-big {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: clamp(20px, 5vw, 26px);
  font-weight: 700;
  line-height: 1.25;
}

.page-contact .rail-text {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-contact .rail-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .rail-links li {
  position: relative;
  padding-left: 16px;
}

.page-contact .rail-links li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 1px;
  background: var(--grid);
}

.page-contact .rail-links a {
  color: var(--white);
  font-size: 14px;
  line-height: 1.7;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-contact .rail-links a:hover,
.page-contact .rail-links a:focus-visible {
  border-bottom-color: var(--gold);
  color: var(--gold);
}

.page-contact .block + .block {
  margin-top: 54px;
  padding-top: 40px;
  border-top: 1px solid var(--grid-soft);
}

.page-contact .block h2 {
  margin: 0 0 12px;
  font-size: clamp(21px, 5vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-contact .block-lead {
  max-width: 62ch;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 反馈信息清单 ---------- */
.page-contact .info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .info-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 16px 18px;
  background: rgba(18, 35, 60, 0.78);
  border-left: 2px solid var(--grid);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-contact .info-item:nth-child(1) {
  border-left-color: var(--blue);
}

.page-contact .info-item:nth-child(2) {
  border-left-color: var(--gold);
}

.page-contact .info-item:nth-child(3) {
  border-left-color: var(--green);
}

.page-contact .info-item:nth-child(4) {
  border-left-color: var(--red);
}

.page-contact .info-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--muted);
  line-height: 1.2;
}

.page-contact .info-title {
  margin: 0 0 6px;
  color: var(--white);
  font-size: 16px;
  font-weight: 700;
}

.page-contact .info-body p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 处理流程 ---------- */
.page-contact .flow {
  position: relative;
  margin-top: 26px;
}

.page-contact .flow-track {
  display: none;
  position: absolute;
  left: 0;
  top: 44px;
  width: 100%;
  height: 40px;
  pointer-events: none;
}

.page-contact .flow-track path {
  fill: none;
  stroke: var(--grid);
  stroke-width: 2;
  stroke-dasharray: 8 10;
}

.page-contact .flow-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.page-contact .flow-node {
  position: relative;
  padding: 20px;
  background: var(--deep);
  border: 1px solid var(--grid-soft);
  border-radius: var(--radius);
  transition: border-color 0.2s ease;
}

.page-contact .flow-node:hover,
.page-contact .flow-node:focus-within {
  border-color: var(--dim);
}

.page-contact .flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 50%;
  border: 1px solid var(--grid);
  background: var(--ink);
  color: var(--gold);
  font-size: 17px;
  font-weight: 700;
}

.page-contact .panel-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 0;
  background: none;
  border: 0;
  color: var(--white);
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.page-contact .panel-toggle::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--muted);
}

.page-contact .panel-toggle[aria-expanded="true"]::after {
  content: "−";
}

.page-contact .panel-body {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--grid);
}

.page-contact .panel-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-contact .panel-body[hidden] {
  display: none;
}

/* ---------- 合作对接 ---------- */
.page-contact .coop-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .coop-item {
  display: grid;
  gap: 10px;
  padding: 20px 22px;
  background: rgba(18, 35, 60, 0.55);
  border: 1px solid var(--grid-soft);
  border-radius: var(--radius);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-contact .coop-item:hover {
  background: var(--deep);
  border-color: var(--dim);
}

.page-contact .coop-tag {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-contact .coop-body h3 {
  margin: 0 0 8px;
  color: var(--white);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-contact .coop-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

/* ---------- 底部轨道装饰 ---------- */
.page-contact .base-rail {
  margin-top: 46px;
  padding: 20px 0 40px;
  border-top: 1px solid var(--grid-soft);
}

.page-contact .base-rail-ticks {
  display: block;
  height: 16px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--grid) 0 1px,
    transparent 1px 52px
  );
  opacity: 0.75;
}

/* ---------- 悬停提示（仅指针设备） ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-contact .flow-node::after {
    content: attr(data-tip);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%) translateY(4px);
    padding: 8px 12px;
    max-width: 260px;
    background: var(--ink);
    border: 1px solid var(--grid);
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 12px;
    line-height: 1.5;
    white-space: normal;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
    z-index: 5;
  }

  .page-contact .flow-node:hover::after,
  .page-contact .flow-node:focus-within::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-contact .hero-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .contact-hero h1 {
    max-width: 22ch;
  }

  .page-contact .block h2 {
    font-size: 28px;
  }
}

@media (min-width: 900px) {
  .page-contact .channels {
    grid-template-columns: 7fr 5fr;
    gap: 30px;
    align-items: start;
  }

  .page-contact .coop-item {
    grid-template-columns: 132px 1fr;
    align-items: start;
    gap: 20px;
  }

  .page-contact .coop-tag {
    padding-top: 4px;
  }

  .page-contact .flow-track {
    display: block;
  }

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

@media (min-width: 1000px) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(272px, 320px) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

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

  .page-contact .contact-hero {
    padding-top: 34px;
  }
}