.page-contact {
  --contact-gap: clamp(20px, 3vw, 40px);
  --contact-block: clamp(56px, 8vw, 112px);
  display: block;
  padding-bottom: clamp(48px, 6vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(28px, 5vw, 64px) 0 clamp(40px, 6vw, 80px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(76, 29, 149, .55) 0%, rgba(7, 6, 13, 0) 62%),
    radial-gradient(80% 70% at 100% 10%, rgba(58, 199, 245, .10) 0%, rgba(7, 6, 13, 0) 70%);
}

.page-contact .contact-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  align-items: end;
}

.page-contact .contact-hero__title {
  margin: 12px 0 18px;
  line-height: 1.06;
}

.page-contact .contact-hero__lede {
  max-width: 46ch;
  color: var(--text-secondary);
  margin: 0 0 26px;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .contact-hero__aside {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  border-top: 1px solid var(--hairline);
  padding-top: 20px;
}

.page-contact .contact-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: linear-gradient(160deg, rgba(23, 18, 40, .92), rgba(14, 11, 26, .92));
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
}

.page-contact .contact-stat--hot {
  border-color: rgba(255, 166, 83, .45);
}

.page-contact .contact-stat__k {
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--text-muted);
}

.page-contact .contact-stat__v {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.page-contact .contact-stat--hot .contact-stat__v {
  color: var(--amber);
}

.page-contact .contact-stat__d {
  font-size: .8rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- 章节通用 ---------- */
.page-contact .section {
  padding: var(--contact-block) 0;
}

.page-contact .section__head {
  position: relative;
  margin-bottom: clamp(24px, 4vw, 40px);
  padding-left: 0;
}

.page-contact .section__title {
  margin: 6px 0 0;
}

.page-contact .section__num {
  color: var(--neon);
  letter-spacing: .18em;
}

.page-contact .section__anno {
  position: absolute;
  right: 0;
  top: 0;
  color: var(--text-muted);
}

.page-contact .section__head--stack .section__anno {
  display: none;
}

/* ---------- 01 受理范围 ---------- */
.page-contact .contact-scope__lede {
  color: var(--text-secondary);
  margin: 0 0 28px;
  max-width: 40ch;
}

.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--hairline);
}

.page-contact .scope-list__item {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--hairline);
  transition: background 200ms var(--ease);
}

.page-contact .scope-list__item:hover {
  background: linear-gradient(90deg, rgba(168, 85, 247, .08), rgba(7, 6, 13, 0) 70%);
}

.page-contact .scope-list__mark {
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border-radius: 5px;
  border: 1px solid var(--neon);
  position: relative;
}

.page-contact .scope-list__mark::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 4px;
  width: 8px;
  height: 4px;
  border-left: 2px solid var(--neon);
  border-bottom: 2px solid var(--neon);
  transform: rotate(-45deg);
}

.page-contact .scope-list__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 6px;
}

.page-contact .scope-list__desc {
  margin: 0;
  color: var(--text-secondary);
  font-size: .95rem;
  max-width: 46ch;
}

.page-contact .scope-figure {
  margin-bottom: 18px;
}

.page-contact .scope-note {
  padding: 18px 20px;
}

.page-contact .scope-note__title {
  margin: 0 0 8px;
  font-size: .92rem;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .04em;
}

.page-contact .scope-note__text {
  margin: 0;
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- 中段留白 ---------- */
.page-contact .contact-quiet {
  padding: clamp(48px, 10vw, 140px) 0;
  background: linear-gradient(180deg, rgba(14, 11, 26, 0), rgba(76, 29, 149, .16) 50%, rgba(14, 11, 26, 0));
}

.page-contact .contact-quiet__inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.page-contact .contact-quiet__line {
  margin: 0;
  font-size: clamp(1.4rem, 3.4vw, 2.4rem);
  font-weight: 700;
  color: var(--violet-soft);
  letter-spacing: .01em;
  line-height: 1.3;
}

.page-contact .contact-quiet__sub {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .22em;
  color: var(--text-muted);
}

/* ---------- 02 渠道 ---------- */
.page-contact .contact-channels__lede {
  color: var(--text-secondary);
  margin: 0 0 28px;
  max-width: 44ch;
}

.page-contact .channel-deck {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

.page-contact .channel-card {
  position: relative;
  padding: 22px 22px 20px;
  background: linear-gradient(165deg, rgba(23, 18, 40, .95), rgba(14, 11, 26, .95));
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-contact .channel-card--primary {
  border-color: rgba(168, 85, 247, .5);
}

.page-contact .channel-card--primary::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--neon), var(--deep-violet));
}

.page-contact .channel-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.page-contact .channel-card__k {
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--text-muted);
}

.page-contact .channel-card__title {
  margin: 0 0 10px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-contact .channel-card__value {
  margin: 0 0 12px;
  font-size: clamp(.9rem, 2vw, 1.05rem);
  font-weight: 700;
  color: var(--violet-soft);
  word-break: break-all;
  line-height: 1.6;
}

.page-contact .channel-card__desc {
  margin: 0 0 18px;
  font-size: .92rem;
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 40ch;
}

.page-contact .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-contact .copy-btn.is-copied {
  color: var(--amber);
  border-color: rgba(255, 166, 83, .6);
}

.page-contact .contact-channels__foot {
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
  font-size: .92rem;
  color: var(--text-secondary);
  max-width: 60ch;
}

/* ---------- 03 准备事项 ---------- */
.page-contact .contact-prepare__lede {
  color: var(--text-secondary);
  margin: 0 0 32px;
  max-width: 44ch;
}

.page-contact .prep-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--hairline);
  display: grid;
  gap: 26px;
}

.page-contact .prep-step {
  position: relative;
  padding-left: 26px;
}

.page-contact .prep-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(168, 85, 247, .16);
}

.page-contact .prep-step__num {
  display: block;
  font-size: .78rem;
  letter-spacing: .2em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.page-contact .prep-step__title {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.page-contact .prep-step__desc {
  margin: 0;
  font-size: .94rem;
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 46ch;
}

.page-contact .prepare-tip {
  margin-top: 30px;
  padding: 20px 22px;
  border-left: 3px solid var(--blue);
}

.page-contact .prepare-tip__title {
  margin: 0 0 8px;
  font-size: .85rem;
  letter-spacing: .12em;
  color: var(--blue);
}

.page-contact .prepare-tip__text {
  margin: 0;
  font-size: .95rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ---------- 04 跟进节奏 ---------- */
.page-contact .contact-follow {
  background: linear-gradient(180deg, rgba(14, 11, 26, 0), rgba(23, 18, 40, .55), rgba(14, 11, 26, 0));
}

.page-contact .contact-follow__lede {
  color: var(--text-secondary);
  margin: 0 0 16px;
  max-width: 40ch;
}

.page-contact .follow-figure {
  margin-bottom: 22px;
}

.page-contact .follow-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 1px solid var(--hairline);
}

.page-contact .follow-flow__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
}

.page-contact .follow-flow__k {
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--neon);
}

.page-contact .follow-flow__v {
  font-size: .93rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- 05 常见场景 ---------- */
.page-contact .contact-cases__lede {
  color: var(--text-secondary);
  margin: 0 0 26px;
  max-width: 46ch;
}

.page-contact .case-group {
  display: grid;
  gap: 10px;
}

.page-contact .case-row {
  border: 1px solid var(--hairline);
  border-radius: var(--r-md);
  background: rgba(23, 18, 40, .6);
  overflow: hidden;
  transition: border-color 200ms var(--ease);
}

.page-contact .case-row:hover {
  border-color: rgba(168, 85, 247, .45);
}

.page-contact .case-row__tab {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text-primary);
  font: inherit;
}

.page-contact .case-row__name {
  font-size: .98rem;
  font-weight: 600;
}

.page-contact .case-row__sign {
  font-size: 1.1rem;
  color: var(--neon);
  line-height: 1;
  transition: transform 200ms var(--ease);
}

.page-contact .case-row__tab[aria-expanded="true"] .case-row__sign {
  transform: rotate(45deg);
}

.page-contact .case-row__panel {
  padding: 0 18px 18px;
}

.page-contact .case-row__example {
  margin: 0 0 12px;
  padding: 14px 16px;
  background: rgba(7, 6, 13, .7);
  border-left: 2px solid var(--neon);
  border-radius: var(--r-sm);
  font-size: .93rem;
  color: var(--violet-soft);
  line-height: 1.85;
}

.page-contact .case-row__hint {
  margin: 0;
  font-size: .9rem;
  color: var(--text-secondary);
  line-height: 1.85;
}

.page-contact .case-row__link {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(58, 199, 245, .4);
  white-space: nowrap;
}

.page-contact .case-row__link:hover {
  border-bottom-color: var(--blue);
}

.page-contact .contact-cases__foot {
  margin: 26px 0 0;
  font-size: .92rem;
  color: var(--text-secondary);
  max-width: 56ch;
}

.page-contact .contact-cases__footlink {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(58, 199, 245, .4);
}

/* ---------- 收尾 ---------- */
.page-contact .contact-close {
  margin-top: clamp(32px, 6vw, 72px);
  padding: clamp(32px, 5vw, 56px) 0;
  background: linear-gradient(135deg, rgba(76, 29, 149, .38), rgba(23, 18, 40, .9) 62%, rgba(7, 6, 13, .95));
  border-top: 1px solid var(--hairline);
}

.page-contact .contact-close__inner {
  display: grid;
  gap: 22px;
}

.page-contact .contact-close__title {
  margin: 0 0 8px;
  font-size: clamp(1.3rem, 2.8vw, 1.9rem);
  font-weight: 700;
  color: var(--text-primary);
}

.page-contact .contact-close__sub {
  margin: 0;
  font-size: .94rem;
  color: var(--text-secondary);
  max-width: 46ch;
  line-height: 1.85;
}

.page-contact .contact-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 复制提示 ---------- */
.page-contact .copy-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(10px);
  padding: 10px 20px;
  background: rgba(168, 85, 247, .92);
  color: #07060D;
  font-size: .88rem;
  font-weight: 700;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
  z-index: 60;
}

.page-contact .copy-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .channel-deck {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .prep-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 32px;
    border-left: 0;
    border-top: 1px solid var(--hairline);
    padding-top: 26px;
  }

  .page-contact .prep-step {
    padding-left: 0;
  }

  .page-contact .prep-step::before {
    display: none;
  }

  .page-contact .follow-flow__item {
    grid-template-columns: 150px 1fr;
    gap: 16px;
    align-items: baseline;
  }

  .page-contact .contact-close__inner {
    grid-template-columns: 1.4fr auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-contact .contact-hero__aside {
    border-top: 0;
    padding-top: 0;
    grid-template-columns: 1fr;
    border-left: 1px solid var(--hairline);
    padding-left: 28px;
  }

  .page-contact .section__anno {
    writing-mode: vertical-rl;
    letter-spacing: .3em;
    top: 4px;
  }

  .page-contact .channel-deck {
    grid-template-columns: 1.15fr 1fr 1fr;
    gap: 20px;
  }

  .page-contact .contact-scope .scope-figure {
    margin-bottom: 22px;
  }
}

@media (min-width: 1100px) {
  .page-contact .prep-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .scope-list__item,
  .page-contact .case-row,
  .page-contact .case-row__sign,
  .page-contact .copy-toast {
    transition: none;
  }
}