/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 16px 0 36px;
}

.hero__title {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 3.6vw, 2.4rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
}

.hero__desc {
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 首页搜索框 ---------- */
.search {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
}

.search__label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.search__input {
  width: 100%;
  height: 46px;
  padding: 0 18px 0 44px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  box-shadow: var(--shadow);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  appearance: none;
}
.search__input::placeholder { color: var(--text-3); }
.search__input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border-strong));
  box-shadow:
    0 0 0 3px var(--accent-soft),
    var(--shadow);
}

/* 搜索框左侧的放大镜，纯 CSS 绘制 */
.search::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 50%;
  width: 13px;
  height: 13px;
  border: 1.6px solid var(--text-3);
  border-radius: 50%;
  transform: translateY(-65%);
  pointer-events: none;
}
.search::after {
  content: "";
  position: absolute;
  left: 29px;
  top: 50%;
  width: 5px;
  height: 1.6px;
  border-radius: 1px;
  background: var(--text-3);
  transform: translateY(3px) rotate(45deg);
  pointer-events: none;
}

.search-hint {
  max-width: 480px;
  margin: 0 auto 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-3);
  text-align: center;
}

/* ---------- 文档入口卡片 ---------- */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.doc-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}
.doc-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border-strong));
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04), 0 16px 36px -18px rgba(0, 0, 0, 0.18);
}

.doc-card__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 620;
  letter-spacing: -0.01em;
  color: var(--text);
}
.doc-card__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-2);
}
.doc-card[hidden] { display: none; }

/* ---------- 首页内联搜索结果（复用已有 .search-result 的样式） ---------- */
.search-results:empty { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .doc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .doc-grid { grid-template-columns: 1fr; }
}