* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: #221815;
}

ul,
li {
  list-style: none;
}

i {
  font-style: normal;
}

.fl {
  float: left;
}

.fr {
  float: right;
}

.clearfix::after {
  content: '';
  display: block;
  clear: both;
  overflow: hidden;
  height: 0;
}

/* 全局样式补充 */
body {
  font-family: "Helvetica Neue", sans-serif;
  /* 统一字体 */
  color: #333;
  /* 全局文本颜色 */
}

@media screen and (min-width: 820px) {
  .container {
    min-width: 1200px;
  }

  .container .header {
    position: relative;
  }

  .container .header .banner {
    width: 100%;
  }

  .container .content {
    background-image: url(../images/cont-bg.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    padding-bottom: 140px;
  }

  .container .content .w {
    width: 1200px;
    margin: 0 auto;
  }

  .container .content .w .txt-box {
    position: relative;
    background-image: url(../images/circle.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    padding: 30px 40px;
    /* 增大内边距提升阅读体验 */
    margin-bottom: 96px;
    margin-top: -50px;
  }

  .container .content .w .txt-box .arrow-l {
    position: absolute;
    top: -10px;
    left: 30px;
  }

  .container .content .w .txt-box .arrow-r {
    position: absolute;
    bottom: -25px;
    right: 60px;
  }

  .container .content .w .txt-box .pink-box {
    font-size: 21px;
    line-height: 40px;
    padding: 20px;
    text-indent: 2em;
  }

  .container .content .w .list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .container .content .w .list li {
    position: relative;
    width: 100%;
    background-color: #fff;
    padding-top: 0px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    /* Softer shadow */
    transition: all 0.3s ease;
    border-radius: 10px;
    overflow: hidden;
  }

  .container .content .w .list li:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    /* 增强hover阴影 */
    transform: translateY(-3px);
    /* 轻微上浮 */
  }

  .container .content .w .list li .images {
    width: 285px;
    height: 268px;
  }

  .container .content .w .list li .name-box {
    position: relative;
    background-image: url(../images/red.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    padding-top: 90px;
    margin-top: -90px;
    height: 270px;
    z-index: 100;
  }

  .container .content .w .list li .name-box .name-title {
    width: 204px;
    border-radius: 24px;
    padding: 12px 45px;
    background-color: #D41011;
    color: #fff;
    font-size: 22px;
    margin: 0 auto;
    margin-bottom: 18px;
  }

  .container .content .w .list li .name-box .name-txt {
    padding: 0 30px;
    font-size: 17px;
    text-align: left;
    padding-bottom: 20px;
  }

  .container .content .w .list li .name-box .name-a {
    opacity: 0.5;
    font-size: 16px;
    padding-bottom: 20px;
  }

  .container .content .w .list li .name-box .name-a a {
    color: #D41011;
  }

  .container .footer {
    background-color: #E62724;
    padding: 50px 0;
    margin: 0 auto;
  }

  .container .footer p {
    font-size: 15px;
    color: #fff;
    text-align: center;
    margin-bottom: 10px;
  }

  .container .footer p a {
    font-size: 15px;
    color: #fff;
  }

  .container .footer p:last-child {
    margin-bottom: 0;
  }
}

@media screen and (max-width: 820px) {
  .container .header {
    position: relative;
  }

  .container .header .banner {
    width: 100%;
  }

  .container .content {
    display: block;
    padding-bottom: 0.6rem;
  }

  .container .content .w {
    width: 6.86rem;
    margin: 0 auto;
  }

  .container .content .w .txt-box {
    padding: 0.32rem;
    background-image: url(../images/cont-bg-app.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    box-shadow: 2px 2px 10px 2px #bababa;
    border-radius: 0.16rem;
    margin-bottom: 0.32rem;
    margin-top: 0.32rem;
  }

  .container .content .w .txt-box .pink-box {
    font-size: 0.28rem;
    color: #333333;
    text-indent: 2em;
    text-align: justify;
    line-height: 0.5rem;
  }

  .container .content .w .txt-box .arrow-l,
  .container .content .w .txt-box .arrow-r {
    display: none;
  }

  .container .content .w .filter-controls {
    display: flex;
    justify-content: center;
    margin-bottom: 0.3rem;
  }

  .container .content .w .filter-controls .filter-btn {
    padding: 0.15rem 0.4rem;
    font-size: 0.3rem;
    background-color: #f6f6f6;
    border: none;
    border-radius: 0.12rem;
    margin: 0 0.12rem;
    color: #333;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  }

  .container .content .w .filter-controls .filter-btn.active {
    background-color: #C21920;
    color: white;
    box-shadow: 0 4px 8px rgba(194, 25, 32, 0.3);
  }

  .container .content .w .teacher-group {
    display: none;
  }

  .container .content .w .teacher-group.active {
    display: block;
  }

  .container .content .w .list {
    display: flex;
    flex-direction: column;
    gap: 0.32rem;
  }

  /* Transform List Item to Mobile Card Style */
  .container .content .w .list li {
    padding: 0.4rem 0.3rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    /* Softer shadow */
    border-radius: 0.32rem;
    background: linear-gradient(#ffeaea, #fff);
    /* Slightly lighter gradient */
    display: grid;
    grid-template-columns: 1fr 2.2rem;
    /* Give image slightly more space */
    gap: 0.2rem;
    align-items: center;
    transition: unset;
    transform: none;
    min-height: 3.5rem;
  }

  .container .content .w .list li:hover {
    transform: none;
  }

  .container .content .w .list li .images {
    width: 2.2rem;
    height: 3.2rem;
    border-radius: 0.24rem;
    object-fit: cover;
    background-color: #C21920;
    grid-column: 2;
    grid-row: 1;
  }

  .container .content .w .list li .name-box {
    grid-column: 1;
    grid-row: 1;
    background: none;
    padding: 0;
    margin: 0;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    /* Right align content */
    justify-content: center;
    padding-right: 0.1rem;
  }

  .container .content .w .list li .name-box .name-title {
    width: 3.2rem;
    background-image: url(../images/tit-bg.png);
    background-size: 100% 100%;
    border-radius: 0;
    padding: 0.1rem 0;
    padding-right: 0.6rem;
    /* Adjust padding for visual centering in shape */
    background-color: transparent;
    color: #fff;
    font-size: 0.34rem;
    /* Larger Name */
    font-weight: bold;
    margin: 0;
    margin-bottom: 0.24rem;
    text-align: right;
  }

  .container .content .w .list li .name-box .name-txt {
    font-size: 0.28rem;
    color: #333;
    padding: 0;
    text-align: right;
    line-height: 1.5;
    /* Better readability */
    margin-bottom: 0.24rem;
    letter-spacing: 0.02rem;
  }

  .container .content .w .list li .name-box .name-a {
    font-size: 0.26rem;
    padding: 0;
    opacity: 0.8;
  }

  .container .content .w .list li .name-box .name-a a {
    color: #C21920;
    border-bottom: 1px solid rgba(194, 25, 32, 0.3);
    padding-bottom: 2px;
  }

  .container .footer-app {
    padding: 0.4rem 0;
    background-color: #243F52;
    text-align: center;
    font-size: 0.26rem;
    color: #fff;
    line-height: 1.5;
  }
}