.so-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 20px 42px;
}
.so-box {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(10, 30, 70, 0.06);
  margin-bottom: 16px;
}
.so-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.so-head h1 {
  margin: 0;
  font-size: 22px;
  color: var(--c-text);
}
.so-stat {
  color: var(--c-text-3);
  font-size: 13px;
}
.so-form {
  display: flex;
  gap: 10px;
}
.so-input {
  flex: 1;
  min-height: 44px;
  border: 1px solid var(--c-line-strong);
  border-radius: 10px;
  padding: 0 12px;
  font-size: 15px;
  background: var(--c-bg);
  color: var(--c-text);
}
.so-input:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(66, 125, 249, 0.15);
}
.so-btn {
  min-height: 44px;
  min-width: 108px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, #3c7bff, #4f8cff);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.so-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.so-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: 12px;
  padding: 14px 16px;
}
a.so-item-link {
  display: block;
  text-decoration: none;
  color: inherit;
  margin: -14px -16px;
  padding: 14px 16px;
  border-radius: 12px;
  outline: none;
}
a.so-item-link:hover {
  background: rgba(66, 125, 249, 0.06);
}
a.so-item-link.so-item-link--ppt {
  display: block;
}
.so-item-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
}
.so-thumb {
  width: 132px;
  min-width: 132px;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(
    135deg,
    rgba(66, 125, 249, 0.1),
    rgba(66, 125, 249, 0.03)
  );
  border: 1px solid var(--c-line);
  position: relative;
}
.so-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.so-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.06));
}
.so-item-main {
  flex: 1;
  min-width: 0;
}
a.so-item-link:focus-visible {
  box-shadow: 0 0 0 2px var(--c-primary);
}
a.so-item-link .so-item-title {
  color: #1f58d8;
}
a.so-item-link:hover .so-item-title {
  text-decoration: underline;
}
.so-item-meta {
  font-size: 12px;
  color: var(--c-text-3);
  margin-bottom: 6px;
}
.so-item-title {
  margin: 0 0 6px;
  font-size: 19px;
  line-height: 1.4;
}
.so-item-title a {
  color: #1f58d8;
  text-decoration: none;
}
.so-item-title a:hover {
  text-decoration: underline;
}
.so-item-snippet {
  margin: 0;
  color: var(--c-text-2);
  line-height: 1.7;
  font-size: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.so-empty,
.so-error {
  background: var(--c-card);
  border: 1px dashed var(--c-line-strong);
  border-radius: 12px;
  padding: 16px;
  color: var(--c-text-3);
}
.so-error {
  color: #c62828;
  border-color: rgba(198, 40, 40, 0.35);
}
.so-pager {
  margin-top: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.so-page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 6px;
  border: 0;
  border-radius: 0;
  text-decoration: none;
  color: var(--c-text-2);
  font-size: 13px;
  background: transparent;
}
.so-page-link:hover {
  color: var(--c-primary);
  text-decoration: underline;
}
.so-page-link.is-active {
  color: var(--c-primary);
  font-weight: 700;
  text-decoration: underline;
}
.so-page-ellipsis {
  color: var(--c-text-3);
  font-size: 13px;
  padding: 0 4px;
}
@media (max-width: 720px) {
  .so-main {
    padding: 14px 12px 28px;
  }
  .so-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .so-form {
    flex-direction: column;
  }
  .so-btn {
    width: 100%;
  }
  .so-item-title {
    font-size: 17px;
  }
  .so-list {
    grid-template-columns: 1fr;
  }
  .so-item-row {
    gap: 10px;
  }
  .so-thumb {
    width: 110px;
    min-width: 110px;
  }
}