.page-contact {
  --pc-gap: clamp(16px, 2.4vw, 26px);
  --pc-r: 24px;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-contact .crumb {
  margin-bottom: clamp(16px, 2.6vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  display: grid;
  gap: var(--pc-gap);
  padding: clamp(22px, 3.4vw, 44px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, var(--c-panel) 0%, var(--c-bg) 68%);
  overflow: hidden;
  isolation: isolate;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  right: -140px;
  bottom: -170px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 255, 61, .2) 0%, rgba(200, 255, 61, 0) 72%);
  pointer-events: none;
}

.page-contact .contact-hero__copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(30px, 6vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--c-ink);
}

.page-contact .contact-hero .lede {
  max-width: 56ch;
  margin: 0;
  color: var(--c-text);
}

.page-contact .contact-quick {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.page-contact .contact-quick li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  background: rgba(27, 34, 48, .74);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--c-text);
}

.page-contact .contact-quick li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-lime);
}

.page-contact .contact-hero__art {
  position: relative;
  z-index: 1;
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: var(--c-raise);
  overflow: hidden;
  max-width: 380px;
  justify-self: center;
}

.page-contact .contact-hero__art img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 双栏 ---------- */
.page-contact .contact-duo {
  display: grid;
  gap: var(--pc-gap);
  margin-top: clamp(34px, 5vw, 62px);
}

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

.page-contact .channel-stack {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-contact .channel-card {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--c-line);
  border-radius: var(--pc-r);
  background: linear-gradient(160deg, var(--c-panel), var(--c-bg));
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.page-contact .channel-card:hover {
  transform: translateY(-4px);
  border-color: rgba(200, 255, 61, .48);
  box-shadow: var(--shadow);
}

.page-contact .channel-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.page-contact .channel-card__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 14px;
  background: var(--c-lime-dim);
  color: var(--c-lime);
}

.page-contact .channel-card__icon svg {
  width: 22px;
  height: 22px;
}

.page-contact .channel-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .channel-card__value {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(16px, 2.4vw, 21px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--c-lime);
  word-break: break-all;
}

.page-contact .channel-card__value--text {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--c-ink);
  word-break: break-word;
}

.page-contact .channel-card__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 流程 ---------- */
.page-contact .flow {
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--c-line);
  border-radius: var(--pc-r);
  background: var(--c-panel);
}

.page-contact .flow__steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-contact .flow__step {
  position: relative;
  padding: 0 0 6px 44px;
}

.page-contact .flow__step + .flow__step {
  margin-top: 20px;
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 32px;
  bottom: -20px;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-line), rgba(42, 52, 66, 0));
}

.page-contact .flow__step:last-child::before {
  display: none;
}

.page-contact .flow__dot {
  position: absolute;
  left: 0;
  top: 2px;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-lime);
  color: var(--c-bg);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-contact .flow__step h3 {
  margin: 0 0 4px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-contact .flow__art {
  margin: 24px 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--c-raise);
}

.page-contact .flow__art img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 邮件怎么写 ---------- */
.page-contact .mail-how {
  margin-top: clamp(38px, 5.4vw, 70px);
}

.page-contact .mail-how__grid {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-contact .mail-how__item {
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
}

.page-contact .mail-how__item--accent {
  background: linear-gradient(150deg, rgba(255, 106, 43, .14), rgba(18, 23, 31, .9));
  border-color: rgba(255, 106, 43, .38);
}

.page-contact .mail-how__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .mail-how__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-contact .mail-how__code {
  padding: 10px 14px;
  margin-bottom: 12px !important;
  border-radius: var(--r-sm);
  border: 1px dashed rgba(200, 255, 61, .4);
  background: rgba(38, 54, 15, .55);
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--c-lime) !important;
  word-break: break-all;
}

.page-contact .mail-how__list {
  margin: 0;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--c-text);
}

.page-contact .mail-how__list li::marker {
  color: var(--c-orange);
}

.page-contact .mail-tpl {
  margin-top: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-raise);
  overflow: hidden;
}

.page-contact .mail-tpl summary {
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-lime);
  letter-spacing: .01em;
}

.page-contact .mail-tpl summary:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: -2px;
}

.page-contact .mail-tpl__body {
  padding: 4px 20px 20px;
  border-top: 1px solid var(--c-line);
}

.page-contact .mail-tpl__line {
  margin: 0;
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-text);
  word-break: break-word;
}

/* ---------- 合作与接口 ---------- */
.page-contact .partner {
  margin-top: clamp(38px, 5.4vw, 70px);
}

.page-contact .partner__grid {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-contact .partner__card {
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  border-left: 3px solid var(--c-blue);
  background: var(--c-panel);
}

.page-contact .partner__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .partner__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-contact .partner__foot {
  margin: 16px 0 0;
  padding: 14px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: rgba(27, 34, 48, .6);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text);
}

/* ---------- 回复时效 ---------- */
.page-contact .reply {
  margin-top: clamp(38px, 5.4vw, 70px);
}

.page-contact .reply-matrix {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.page-contact .reply-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  padding: 15px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
  transition: border-color .18s ease, background .18s ease;
}

.page-contact .reply-row:hover {
  border-color: rgba(200, 255, 61, .4);
  background: var(--c-raise);
}

.page-contact .reply-row__type {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .reply-row__time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: var(--c-muted);
}

.page-contact .reply-row__time b {
  color: var(--c-orange);
  font-weight: 700;
}

.page-contact .reply-row--note {
  border-style: dashed;
}

.page-contact .reply-row--note .reply-row__time {
  color: var(--c-blue);
}

/* ---------- 收束条 ---------- */
.page-contact .contact-outro {
  display: grid;
  gap: 18px;
  margin-top: clamp(38px, 5.4vw, 70px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(200, 255, 61, .1) 0%, var(--c-panel) 52%, var(--c-panel) 100%);
}

.page-contact .contact-outro h2 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-contact .contact-outro p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text);
}

.page-contact .contact-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-contact .mail-how__grid,
  .page-contact .partner__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .reply-row {
    flex-wrap: nowrap;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: center;
  }

  .page-contact .contact-hero__art {
    max-width: none;
  }
}

@media (min-width: 980px) {
  .page-contact .contact-duo {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-outro {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-contact .contact-outro__links {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .reply-row {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}