.page-contact {
  --contact-gap: clamp(40px, 6vw, 76px);
  --contact-radius: 20px;
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-contact .breadcrumbs {
  padding-top: clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.5vw, 36px) 0 clamp(38px, 5.5vw, 68px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  left: 50%;
  width: min(940px, 130%);
  height: 420px;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side, rgba(53, 224, 208, 0.15), transparent 72%),
    radial-gradient(closest-side at 78% 40%, rgba(139, 92, 246, 0.13), transparent 70%);
  pointer-events: none;
}

.page-contact .contact-hero .eyebrow {
  position: relative;
  margin: 0;
}

.page-contact .contact-hero__title {
  position: relative;
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 62px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-contact .contact-hero__lead {
  position: relative;
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(242, 239, 233, 0.74);
}

.page-contact .contact-hero__tags {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__tags li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 6px 13px;
  border-radius: 999px;
  color: var(--cyan);
  border: 1px solid rgba(53, 224, 208, 0.28);
  background: rgba(53, 224, 208, 0.07);
}

/* ---------- 左轨 + 主区 ---------- */
.page-contact .layout-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.page-contact .contact-body {
  min-width: 0;
}

.page-contact .index-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 10px;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line);
}

.page-contact .index-rail::-webkit-scrollbar {
  display: none;
}

.page-contact .index-rail__label {
  display: none;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--stone);
}

.page-contact .index-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(242, 239, 233, 0.7);
  text-decoration: none;
  white-space: nowrap;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .index-rail__link:hover,
.page-contact .index-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-color: rgba(53, 224, 208, 0.45);
}

.page-contact .index-rail__num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--violet);
}

/* ---------- 章节骨架 ---------- */
.page-contact .contact-section {
  padding: var(--contact-gap) 0 0;
  margin-top: var(--contact-gap);
  border-top: 1px solid var(--line);
}

.page-contact .contact-body > .contact-section:first-child {
  margin-top: clamp(20px, 3vw, 32px);
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-section__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .contact-section__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-contact .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .contact-section__desc {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 239, 233, 0.66);
}

/* ---------- 三条通道 ---------- */
.page-contact .channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--contact-radius);
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
}

.page-contact .channel {
  padding: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--line);
}

.page-contact .channel:first-child {
  border-top: 0;
}

.page-contact .channel__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 12px;
  color: var(--orange);
  background: rgba(255, 138, 61, 0.12);
  border: 1px solid rgba(255, 138, 61, 0.26);
}

.page-contact .channel__name {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(242, 239, 233, 0.58);
}

.page-contact .channel__value {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 17.5px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--bone);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--addr {
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 239, 233, 0.88);
}

.page-contact .channel__use {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 239, 233, 0.66);
}

.page-contact .channel__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--moss);
}

/* ---------- 按类型选通道 ---------- */
.page-contact .route-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-contact .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .route-item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(53, 224, 208, 0.45);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  background: linear-gradient(180deg, rgba(28, 39, 64, 0.5), rgba(11, 18, 32, 0.18));
}

.page-contact .route-item__title {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}

.page-contact .route-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 239, 233, 0.66);
}

.page-contact .route-item a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.4);
}

.page-contact .route-item a:hover {
  border-bottom-color: var(--cyan);
}

.page-contact .route-figure {
  margin: 0;
  border-radius: var(--contact-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .route-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-contact .route-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(242, 239, 233, 0.55);
}

/* ---------- 材料清单 ---------- */
.page-contact .materials {
  padding: clamp(16px, 2.6vw, 26px);
  border-radius: var(--contact-radius);
  border: 1px solid rgba(53, 224, 208, 0.22);
  background: linear-gradient(118deg, rgba(53, 224, 208, 0.08), rgba(139, 92, 246, 0.09) 52%, rgba(11, 18, 32, 0.12) 100%);
}

.page-contact .materials__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .material {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: rgba(11, 18, 32, 0.5);
}

.page-contact .material__box {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border-radius: 4px;
  border: 1.5px solid rgba(53, 224, 208, 0.55);
  background: rgba(53, 224, 208, 0.1);
}

.page-contact .material__box::after {
  content: "";
  position: absolute;
  left: 3.5px;
  top: 3.5px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-contact .material__text {
  min-width: 0;
}

.page-contact .material__num {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-contact .material h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}

.page-contact .material p {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: rgba(242, 239, 233, 0.62);
}

/* ---------- 时效 ---------- */
.page-contact .response-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--contact-radius);
  overflow: hidden;
  background: var(--line);
}

.page-contact .response-item {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--ink);
}

.page-contact .response-item__key {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-contact .response-item__sub {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-contact .response-item__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 239, 233, 0.66);
}

/* ---------- 合作共建 ---------- */
.page-contact .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .partner {
  position: relative;
  padding: 22px 20px 20px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  border-top: 2px solid rgba(53, 224, 208, 0.5);
  background: rgba(28, 39, 64, 0.46);
}

.page-contact .partner:nth-child(2) {
  border-top-color: rgba(139, 92, 246, 0.55);
}

.page-contact .partner:nth-child(3) {
  border-top-color: rgba(111, 168, 138, 0.6);
}

.page-contact .partner__no {
  position: absolute;
  top: 12px;
  right: 16px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  color: rgba(138, 147, 166, 0.26);
}

.page-contact .partner h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--bone);
}

.page-contact .partner p {
  margin: 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.74;
  color: rgba(242, 239, 233, 0.64);
}

/* ---------- 自助排查 ---------- */
.page-contact .help-card {
  max-width: 660px;
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--contact-radius);
  border: 1px solid rgba(53, 224, 208, 0.24);
  background: linear-gradient(150deg, rgba(28, 39, 64, 0.74), rgba(11, 18, 32, 0.52));
}

.page-contact .help-card .eyebrow {
  margin: 0 0 12px;
}

.page-contact .help-card p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(242, 239, 233, 0.68);
}

.page-contact .help-card a:not(.btn) {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.4);
}

.page-contact .help-card .btn {
  margin-top: 22px;
}

/* ---------- 尾图 ---------- */
.page-contact .contact-tail {
  margin: var(--contact-gap) 0 0;
  border-radius: var(--contact-radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .contact-tail img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .materials__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 16px;
  }

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

@media (min-width: 880px) {
  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .channel {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-contact .channel:first-child {
    border-left: 0;
  }

  .page-contact .route-split {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .route-figure img {
    aspect-ratio: 3 / 4;
  }

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

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

@media (min-width: 1000px) {
  .page-contact .layout-rail {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 44px;
  }

  .page-contact .index-rail {
    position: sticky;
    top: calc(var(--rail-top) + 18px);
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
    border-bottom: 0;
  }

  .page-contact .index-rail__label {
    display: block;
  }

  .page-contact .index-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 8px 0 8px 12px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-contact .index-rail__link:hover,
  .page-contact .index-rail__link[aria-current="true"] {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(53, 224, 208, 0.1), transparent 85%);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact [data-reveal] {
    transform: none !important;
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>