.support-main { background: #fff; }
  .support-hero { position: relative; min-height: 680px; padding: 130px 0 86px; color: #fff; background: url('../images/support-background.png') center/cover no-repeat; }
  .support-container { position: relative; z-index: 1; width: min(var(--container), calc(100% - 72px)); margin: auto; }
  .support-eyebrow { margin: 0 0 14px; color: #4ab5ff; font-size: 14px; font-weight: 800; letter-spacing: 3px; }
  .support-title { margin: 0 0 42px; color: #fff; font-size: clamp(42px, 5vw, 64px); line-height: 1.15; }
  .support-featured-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
  .support-featured-card { min-height: 330px; display: flex; flex-direction: column; align-items: flex-start; padding: 38px; color: #172536; background: rgba(255,255,255,.97); border-radius: 14px; text-decoration: none; box-shadow: 0 18px 48px rgba(0,0,0,.18); transition: transform .2s ease, box-shadow .2s ease; }
  .support-featured-card:hover { transform: translateY(-5px); box-shadow: 0 24px 58px rgba(0,0,0,.24); }
  .support-tag { display: inline-flex; padding: 7px 13px; color: #0878e9; background: #eaf5ff; border-radius: 999px; font-size: 13px; font-weight: 800; }
  .support-featured-card h2 { margin: 23px 0 14px; font-size: 28px; line-height: 1.35; }
  .support-featured-card p { margin: 0; color: #5b6877; font-size: 16px; line-height: 1.8; }
  .support-read { margin-top: auto; padding-top: 30px; color: #0878e9; font-weight: 800; }
  .support-list-section { padding: 88px 0 100px; background: #fff; }
  .support-list-title { margin: 0 0 34px; font-size: 38px; color: #172536; }
  .support-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
  .support-tabs a { padding: 9px 18px; border-radius: 999px; background: #f2f6fa; color: #526174; font-size: 14px; font-weight: 700; text-decoration: none; }
  .support-tabs a.active { color: #fff; background: #0878e9; }
  .support-list { border-top: 1px solid #dfe7ef; }
  .support-list-item { display: grid; grid-template-columns: 180px 1fr auto; align-items: center; gap: 34px; padding: 30px 0; color: inherit; text-decoration: none; border-bottom: 1px solid #dfe7ef; }
  .support-list-thumb { height: 112px; border-radius: 10px; background: #f2f6fa center/contain no-repeat; }
  .support-list-copy small { color: #0878e9; font-weight: 800; }
  .support-list-copy h3 { margin: 8px 0; font-size: 22px; color: #172536; }
  .support-list-copy p { margin: 0; color: #667385; line-height: 1.7; }
  .support-list-arrow { color: #0878e9; font-size: 26px; }
  @media (max-width: 900px) {
    .support-hero { min-height: auto; padding: 105px 0 66px; }
    .support-featured-grid { grid-template-columns: 1fr; }
    .support-container { width: min(100% - 36px, var(--container)); }
    .support-list-item { grid-template-columns: 110px 1fr; gap: 18px; }
    .support-list-thumb { height: 86px; }
    .support-list-arrow { display: none; }
  }

/* 置顶文章卡片新版背景 */
.support-featured-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: #102a43;
  background: linear-gradient(
    145deg,
    rgba(239, 248, 255, 0.98) 0%,
    rgba(255, 255, 255, 0.96) 58%,
    rgba(219, 240, 255, 0.96) 100%
  );
  border: 1px solid rgba(134, 203, 248, 0.72);
  border-radius: 22px;
  box-shadow:
    0 20px 48px rgba(0, 31, 61, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease;
}

.support-featured-card:nth-child(2) {
  background: linear-gradient(
    145deg,
    rgba(239, 248, 255, 0.98) 0%,
    rgba(255, 255, 255, 0.96) 58%,
    rgba(219, 240, 255, 0.96) 100%
  );
  border-color: rgba(134, 203, 248, 0.72);
}

.support-featured-card::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, #169af4 0%, #52c4ff 72%, transparent 100%);
}

.support-featured-card::after {
  content: "01";
  position: absolute;
  z-index: -1;
  right: 24px;
  bottom: -28px;
  color: rgba(22, 154, 244, 0.075);
  font-size: 142px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -10px;
}

.support-featured-card:nth-child(2)::after { content: "02"; }

.support-featured-card:hover {
  transform: translateY(-7px);
  border-color: rgba(22, 154, 244, 0.78);
  box-shadow:
    0 28px 64px rgba(0, 31, 61, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.92);
}

.support-tag,
.support-featured-card:nth-child(2) .support-tag {
  color: #0878e9;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(22, 154, 244, 0.22);
  box-shadow: 0 6px 16px rgba(22, 154, 244, 0.09);
}

.support-featured-card h2 { color: #102a43; }
.support-featured-card p { color: #52677c; }

@media (max-width: 560px) {
  .support-featured-card { border-radius: 18px; }
  .support-featured-card::after {
    right: 18px;
    bottom: -18px;
    font-size: 108px;
  }
}
  @media (max-width: 560px) {
    .support-title { font-size: 40px; }
    .support-featured-card { min-height: 300px; padding: 28px; }
    .support-featured-card h2 { font-size: 23px; }
    .support-list-item { grid-template-columns: 1fr; }
    .support-list-thumb { height: 140px; }
  }