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/* 页头说明保持清晰，避免手机端小字显得模糊。 */
.brand small { font-size:12px; font-weight:500; letter-spacing:.5px; color:#183e35; }
.header-note { font-size:12px; font-weight:500; color:#183e35; }
@media(max-width:700px) {
  .brand small { font-size:12px; letter-spacing:0; }
  .header-note { font-size:12px; }
}