:root {
      --main-blue: #2ca5dc;
      --dark-blue: #004a97;
      --light-blue: #95d2ed;
      --gray: #f5f7fa;
      --light-gray: #c1c2c3;
      --text-gray: #444;
      --button-red: #ef5a4e;
      --card-bg: #fff;
      --border-radius: 18px;
    }

    html, body {
      height: 100%;
      margin: 0;
      padding: 0;
      font-family: 'Noto Sans TC', 'Microsoft JhengHei', Arial, sans-serif;
      background: var(--gray);
    }

    html, body {
      /* 防止 body 出現捲軸 */
      /*overflow: hidden;*/
    }

    body {
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: flex-start;
      padding: 25px 0;
      box-sizing: border-box;
    }

    .container {
      color: white;
      background: #0084ff;
      border-radius: 24px;
      padding: 24px 20px 32px 20px;
      box-shadow: 0 6px 24px 0 #cdd7e2;
      width: 100%;
      max-width: 440px;
      /*height: calc(100vh - 50px);*/
      margin: 0 auto;
      box-sizing: border-box;
      position: relative;
      /* Add aspect ratio for desktop */
      /*aspect-ratio: 375/696;*/
      display: flex;
      flex-direction: column;
      justify-content: flex-start;
    }

    .headset-icon {
      position: relative;
      margin: 0;
    }
    .icon-headset {
      width: 50px;
      height: 50px;
      display: block;
      margin: 0 0 6px auto;
    }

    .AMClogo {
      width: 38px;
      display: block;
      margin: -50px 0 0 auto;
      position: absolute;
      right: 6px;
    }
      
    .logo {
      width: 168px;
      display: block;
      margin: -10px auto 10px;
      padding: 8px 12px 8px 20px;
      border-radius: 12px;
      background-color: var(--card-bg);
    }

    .title {
      color: white;
      font-size: 28px;
      font-weight: bold;
      text-align: center;
      margin-top: 10px;
      margin-bottom: 10px;
      letter-spacing: 1px;
      flex-shrink: 0;
    }
/*--  top-bar header  --*/
    .top-bar {
      display: flex;
      align-items: center;
      margin-bottom: 10px;
      flex-shrink: 0;
    }
    .back-arrow {
      width: 32px;
      height: 32px;
      margin-right: 8px;
      cursor: pointer;
      flex-shrink: 0;
    }
    .header-title {
      flex: 1;
      /* color: var(--text-gray); */
      font-size: 15px;
      font-weight: 400;
      text-align: center;
      margin-right: 34px; /* for centering with arrow present */
    }
/*--  main content  --*/
    .main-title, .question-title {
      /* color: var(--main-blue); */
      font-size: 28px;
      font-weight: bold;
      text-align: center;
      margin-top: 10px;
      margin-bottom: 10px;
      letter-spacing: 1px;
      flex-shrink: 0;
    }
    .question-title {
      font-size: 25px;
      letter-spacing: 0px;
    }

    .desc {
      /* color: var(--text-gray); */
      font-size: 18px;
      line-height: 1.5;
      text-align: left;
      margin: 0 25px 18px;
      flex-shrink: 0;
    }

    .main-card, .card {
      /*background: var(--card-bg);
      border-radius: var(--border-radius);*/
      padding: 10px 16px;
      margin: -20px 0 10px;
      color: var(--text-gray);
      font-size: 16px;
      position: relative;
      /*overflow-y: auto;*/
    }
    .main-card ul {
      list-style: none;
      padding: 0;
      margin: 0 auto;
      max-width: 310px;
    }
    .main-card li {
      position: relative;
      display: flex;
      align-items: flex-start;
      justify-content: center;
      margin: 20px auto 40px;
      padding: 15px 0 0;
      font-size: 18px;
      line-height: 1.35;
      background-color: #fff;
      border-radius: 42px; 
      height: 66px;
      border-bottom: solid #cae8f5 2px;
    }
    .main-card li::before{
      content: '↓';
      display: flex;
      padding: 0.125em;
      align-items: center;
      justify-content: center;
      font-size: 0.65em;
      font-weight: bold;
      width: 18px;
      height: 18px;
      border: 1px solid white;
      border-radius: 50%;
      color: white;
      position: absolute;
      bottom: -2.65em;
      animation: jump 0.3s infinite;
    }
    .main-card li::after{
      content: '';
      padding: 0.25em;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 18px;
      height: 18px;
      font-size: 2.25em;
      color: #0084ff;
      /* background-color: #0084ff; */
      border-radius: 50%;
      position: absolute;
      top: 20px;
      /* transform: translateY(50%); */
      right: 0.25em;
    }
    .main-card li:nth-child(1)::after{
      content: '1';
    }
    .main-card li:nth-child(2)::after{
      content: '2';
    }.main-card li:nth-child(3)::after{
      content: '3';
    }
    @keyframes jump {
      0%{
        transform: translateY(0);
      }
      50%{
        transform: translateY(5px);
      }
      100%{
        transform: translateY(0);
      }
    }
    .main-card li:last-child::before{
      display: none;
    }
    .main-card li:last-child {
      margin-bottom: 0;
    }
    .main-card .emoji {
      width: 180px;
      display: inline-flex;
    }
    .main-card img {
      flex-shrink: 0;
      width: 100px;
      height: 100px;
      margin-top: -25px;
      text-align: center;

    }
    .main-card img.left {
      margin-left: -40px;
      padding-right: 10px;
    }
    .main-card img.right {
      margin-right: -40px;
      padding-left: 10px;
    }

    .tips {
      color: white;
      background: none;
      font-size: 15px;
      display: block;
      text-align: center;
      position: relative;
      margin: 5px 20px 18px 58px;
    }
    .tips .emoji {
      font-size: 24px;
      margin-left: -42px;
      flex-shrink: 0;
      width: 38px;
      text-align: center;
      position: absolute;
      top: -8px;
      left: auto;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--border-radius);
      padding: 18px 25px 18px;
      margin-top: 0px;
      font-size: 18px;
      box-sizing: border-box;
      flex-shrink: 0;
    }
    .card-title-row {
      display: flex;
      align-items: center;
      margin-bottom: 4px;
    }
    .question-title-row {
      display: inline-flex;
      flex-direction: column;
      margin-bottom: 10px;
    }
    .question-title-row img {
      margin: 0 auto;
      padding: 0;
      width: 150px;
      height: auto;
      max-width: 100%;
      max-height: 100%;
    }
    .card-title-row > .question-list {
      position: relative;
      margin: 0 0 0 45px;
    }
    .card-title-row > .question-list input[type="radio"] {
      box-sizing: border-box;
      padding: 0;
    }
    .card-title-row > .question-list .radio-group label, .radio-group {
      display: block;
      margin: 3px 0;
      padding: 0;
    }
    .card-title-row > .question-list .radio-group label {
      display: inline;
      margin-left: -42px;
    }
    .radio-group > .radio-input {
      visibility: hidden;
    }
    .radio-group > .radio-label {
      font-size: 18px;
      cursor: pointer;
      position: relative;
      margin: 0;
      padding: 0;
    }
    .radio-label .radio-button {
      width: 14px;
      height: 14px;
      border: 3px solid var(--main-blue);
      border-radius: 50%;
      display: inline-block;
      position: absolute;
      left: -26px;
      top: 5px;
    }
    .radio-label .radio-button::after {
      content: "";
      display: block;
      height: 7px;
      width: 7px;
      border-radius: 50%;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: var(--main-blue);
      opacity: 0;
      transition: opacity 0.2s;
    }
    .radio-group > .radio-input:checked ~ .radio-label .radio-button::after {
      opacity: 1;
    }

    .card .icon {
      position: relative;
      font-size: 22px;
      margin-right: 10px;
      padding: 2px;
      flex-shrink: 0;
      width: 42px;
      height: 42px;
      text-align: center;
      background: #eee;
      border-radius: 42px;
      display: inline-flex;
    }
    .card .icon.Wifi svg {
      position: absolute;
      margin-top: -9px;
      margin-left: -9px;
    }
    .card .icon.earphone svg {
      position: absolute;
      margin-top: -3px;
    }
    .card .card-title {
      font-size: 17px;
      font-weight: bold;
      color: var(--main-blue);
      margin-right: 4px;
    }
    .card .card-desc {
      font-size: 15px;
      color: var(--text-gray);
      margin: 8px 10px 8px;
    }
    .card .audio-box {
      margin: 6px 0 0 0;
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: flex-start;
    }
    .card .audio-box audio {
      width: 100%;
      max-width: 290px;
      margin-left: auto;
      margin-right: auto;
      background: #eee;
      border-radius: 28px;
    }
    .card .note {
      color: #1894dc;
      font-size: 14px;
      margin: 8px 10px 8px;
      display: block;
      text-decoration: none;
    }
    .card .note strong {
      color: #1894dc;
      font-weight: 700;
      text-decoration: underline;
      cursor: pointer;
    }
    .card .note span {
      color: var(--text-gray);
      display: inline;
    }
    .card .quest-number {
      color: var(--light-gray);
      font-size: 15px;
      text-align: center;
      margin: 10px auto 20px;
      display: block;
    }


/*--  btn  --*/
    .btn-start {
      display: block;
      width: calc(100% - 20px);
      background: #3f3f42;
      color: #ffcc40;
      border: none;
      border-radius: 30px;
      font-size: 20px;
      font-weight: bold;
      padding: 16px 0;
      margin: 8px 10px 8px;
      cursor: pointer;
      /* box-shadow: 0 2px 8px 0 #f3d1d1; */
      transition: background 0.2s;
      letter-spacing: 2px;
    }
    .btn-start:hover, .btn-start:focus {
      color: black;
      background: #ffcc40;
    }

    @media (max-width: 480px) {
      body {
        padding: 0;
      }
      .container {
        border-radius: 0;
        max-width: 100vw;
        min-height: 100vh;
        padding: 28px 8px 28px 8px;
        aspect-ratio: unset;
      }
    }
    @media (min-width: 700px) {
      .container {
        max-width: 600px;
        padding: 32px 40px 40px 40px;
      }
    }
    @media (min-width: 1000px) {
      .container {
        max-width: 700px;
        padding: 32px 60px 48px 60px;
      }
    }