* { box-sizing: border-box; }

body {
  font-family: Georgia, 'Noto Serif SC', 'Times New Roman', serif;
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  background: #faf8f3;
  color: #2c2c2c;
  line-height: 1.7;
  text-align: center;
}

header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #e0d9c9;
}

h1 {
  color: #1a3a5c;
  font-size: 2.8rem;
  margin: 0.5rem 0;
  letter-spacing: 1px;
}
h1 a { color: inherit; text-decoration: none; }

.subtitulo {
  color: #777;
  font-style: italic;
  font-size: 1.15rem;
  margin: 0.6rem 0 1.5rem;
}

/* 导航 */
nav {
  margin-top: 1.5rem;
  font-size: 1.15rem;
}
nav a {
  color: #1a3a5c;
  text-decoration: none;
  margin: 0 1.5rem;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
nav a:hover { border-bottom-color: #1a3a5c; }

/* 搜索框 */
#buscador {
  width: 100%;
  padding: 0.9rem 1.1rem;
  font-size: 1.1rem;
  font-family: inherit;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff;
  margin-bottom: 2rem;
  text-align: center;
}
#buscador:focus {
  outline: none;
  border-color: #1a3a5c;
  box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.08);
}

/* 卡片 */
.tarjeta {
  background: #fff;
  border-left: 4px solid #1a3a5c;
  padding: 1.3rem 1.5rem;
  margin-bottom: 1.2rem;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  text-align: left;
}
.tarjeta h2 {
  margin: 0 0 0.7rem;
  color: #1a3a5c;
  font-size: 1.25rem;
}
.pinyin {
  font-size: 0.85rem;
  color: #999;
  font-weight: normal;
  font-style: italic;
}
.def {
  margin: 0.4rem 0;
  font-size: 1rem;
}
.def-es { color: #2c2c2c; }
.def-zh { color: #555; font-size: 0.98rem; }
.def-en { color: #555; font-size: 0.98rem; font-style: italic; }
.fuente {
  font-size: 0.8rem;
  color: #999;
  margin-top: 0.7rem;
  padding-top: 0.6rem;
  border-top: 1px dashed #e0d9c9;
}

.sin-resultados {
  color: #999;
  text-align: center;
  font-style: italic;
}

/* 分组 */
.grupo { margin-bottom: 2.5rem; }
.letra {
  color: #1a3a5c;
  border-bottom: 2px solid #1a3a5c;
  padding-bottom: 0.3rem;
  font-size: 1.3rem;
  text-align: left;
  margin-top: 2rem;
}

/* 关于页 */
main h2, main h3 { color: #1a3a5c; }
main h3 {
  margin-top: 1.8rem;
  font-size: 1.1rem;
}
main ul {
  text-align: left;
  display: inline-block;
  padding-left: 1.2rem;
  line-height: 1.8;
}

/* 页脚 */
footer {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid #e0d9c9;
  font-size: 0.9rem;
  color: #666;
}
.footer-contenido p { margin: 0.3rem 0; }
footer a {
  color: #1a3a5c;
  text-decoration: none;
}
footer a:hover { text-decoration: underline; }
.copyright {
  margin-top: 1.2rem;
  font-size: 0.9rem;
  color: #999;
}

/* 移动端 */
@media (max-width: 600px) {
  body { padding: 2rem 1rem 1.5rem; }
  h1 { font-size: 1.6rem; }
  nav a { margin: 0 0.5rem; font-size: 0.9rem; }
  .tarjeta { padding: 1rem 1.1rem; }
}
.footer-contenido {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 2rem;      /* 上下间距 0.5rem，左右间距 2rem */
  margin-bottom: 1rem;
}
.footer-contenido span {
  white-space: nowrap;
}
.banner {
  width: 100%;
  max-width: 720px;
  margin: 0 auto 2rem;
}

.banner-img {
  width: 100% !important;
  max-width: 720px !important;
  height: auto !important;
  display: block !important;
  margin: 0 auto !important;
}
.termino-en {
  color: #888;
  font-size: 0.9rem;
  font-weight: normal;
  font-style: normal;
}