:root {
  --bg: #be8f66;
  --text: #111111;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

body {
  overflow-x: hidden;
}

.page {
  width: 100%;
  min-height: 100vh;
  background: var(--bg);
  padding: 34px 0 28px 0;
  position: relative;
}

/* 整体横向内容区，靠左，不居中 */
.inner {
  margin-left: 30px;
  margin-right: 30px;
  position: relative;
}

/* 顶部两栏 */
.masthead {
  display: grid;
  grid-template-columns: 260px 420px;
  column-gap: 150px;
  align-items: start;
}

.masthead h1 {
  margin: 0;
  font-size: 22px;
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: 0;
}

.masthead p {
  margin: 10px 0 0 0;
  font-size: 18px;
  line-height: 1.15;
  font-weight: 400;
}

/* 主体正文：左侧窄栏 */
.body-copy {
  width: 780px;
  max-width: 780px;
  margin-top: 145px;
}

.body-copy p {
  margin: 0 0 28px 0;
  width: 780px;
  font-size: 21px;
  line-height: 1.42;
  font-weight: 400;
  letter-spacing: 0;
}

/* 表格 */
.symbol-table {
  border-collapse: collapse;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  color: #222;
  border: 1px solid #9f0d0d;
  letter-spacing: 0.5px;
  margin-top: 20px;
}

.symbol-table td {
  padding: 6px 10px;
}

/* 说明文字 */
.legend {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  color: var(--text);
  letter-spacing: 0.6px;
  line-height: 1.7;
  opacity: 0.85;
  margin-top: 20px;
}

/* featuring 区域 */
.featuring {
  margin-top: 200px;
  width: 980px;
}

.featuring h2 {
  margin: 0 0 10px 0;
  font-size: 20px;
  line-height: 1.1;
  font-weight: 700;
}

.featuring .names {
  font-size: 18px;
  line-height: 1.55;
  font-weight: 400;
  max-width: 980px;
}

.featuring .names a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* footer */
.footer {
  margin-top: 190px;
  padding-bottom: 6px;
  font-size: 12px;
  line-height: 1.8;
  font-weight: 400;
}

.footer a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* 大屏 */
@media (min-width: 1600px) {
  .masthead {
    grid-template-columns: 260px 420px;
    column-gap: 145px;
  }

  .body-copy {
    width: 790px;
  }

  .body-copy p {
    width: 790px;
  }
}

/* 自适应 */
@media (max-width: 1100px) {
  .page {
    padding-top: 26px;
  }

  .inner {
    margin-left: 22px;
    margin-right: 22px;
  }

  .masthead {
    grid-template-columns: 1fr;
    row-gap: 20px;
  }

  .body-copy,
  .body-copy p,
  .featuring {
    width: 100%;
    max-width: 100%;
  }

  .body-copy {
    margin-top: 90px;
  }

  .body-copy p {
    font-size: 18px;
  }

  .masthead h1 {
    font-size: 20px;
  }

  .masthead p,
  .featuring .names {
    font-size: 17px;
  }
}

.transmission-trigger {
  appearance: none;
  border: none;
  background: none;
  padding: 0;
  margin: 0;
  color: var(--text);
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.transmission-box {
  display: none;
  width: 780px;
  max-width: 100%;
  margin-top: 24px;
}

.transmission-box.is-open {
  display: block;
}

.transmission-input {
  width: 100%;
  min-height: 110px;
  padding: 14px 16px;
  border: 1px solid rgba(17, 17, 17, 0.35);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px;
  line-height: 1.5;
  outline: none;

  resize: none;
  overflow: hidden;
}

.transmission-input:focus {
  border-color: rgba(17, 17, 17, 0.65);
}

.transmission-output {
  margin-top: 16px;
  min-height: 60px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "Courier New", Courier, monospace;
  font-size: 22px;
  line-height: 1.8;
}

@media (max-width: 1100px) {
  .transmission-box {
    width: 100%;
  }

  .transmission-input {
    font-size: 17px;
  }

  .transmission-output {
    font-size: 19px;
  }
}