/* ===================================
   Open Sans 300 字体（唯一引用字体）
   =================================== */
@font-face {
  font-family: "Open Sans";
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url(./fonts/open-sans-300.ttf) format("truetype");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}

/* ===================================
   全局字体设置：全部使用 Open Sans 300
   =================================== */
body {
  font-family:
    "Open Sans", "Microsoft YaHei", "微软雅黑", arial, tahoma, "宋体", sans-serif;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Open Sans", "Microsoft YaHei", "微软雅黑", sans-serif;
}

button,
input,
select,
textarea {
  font-family:
    "Open Sans", "Microsoft YaHei", "微软雅黑", arial, tahoma, sans-serif;
}