/* ================================
     基础设置
  ================================= */

  .voc-why-heading,
  .voc-why-heading *,
  #voc-why,
  #voc-why * {
    box-sizing: border-box;
  }

  /* ================================
     白色标题区域
  ================================= */

  .voc-why-heading {
    width: 100%;
    margin: 0;
    padding: 64px 24px 28px;
    background: #ffffff;
  }

  .voc-why-heading__inner {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
  }

  .voc-why-heading__eyebrow {
    margin: 0 0 10px;
    color: #d4aa00;
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 0.16em;
  }

  .voc-why-heading h2 {
    margin: 0;
    color: #2030a8;
    font-family: inherit;
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.5px;
  }

  .voc-why-heading__description {
    max-width: 900px;
    margin: 14px auto 0;
    color: #4b5563;
    font-family: inherit;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.65;
  }

  /* ================================
     黑色背景区域
  ================================= */

  #voc-why {
    --voc-blue: #2437b8;
    --voc-yellow: #f4c900;
    --voc-panel: rgba(35, 41, 55, 0.96);
    --voc-button: rgba(47, 55, 73, 0.94);

    position: relative;
    width: 100%;
    max-width: none;
    margin: 0;
    isolation: isolate;
    overflow: hidden;
    color: #ffffff;
    font-family: inherit;

    /*
     * 没有填写背景图片地址时，
     * 自动显示这个蓝黑色渐变背景。
     */
    background:
      radial-gradient(
        circle at 82% 8%,
        rgba(36, 55, 184, 0.20),
        transparent 38%
      ),
      linear-gradient(
        120deg,
        #0b101b 0%,
        #101725 55%,
        #121a2c 100%
      );
  }

  /* 背景图片层 */
  #voc-why .voc-why__backdrop {
    position: absolute;
    inset: 0;
    z-index: -2;
    background-position: 78% 20%;
    background-size: cover;
    background-repeat: no-repeat;
    transform: scale(1.01);
  }

  /* 背景图片遮罩 */
  #voc-why::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;

    background: linear-gradient(
      120deg,
      rgba(7, 11, 19, 0.28) 0%,
      rgba(9, 14, 25, 0.18) 55%,
      rgba(12, 18, 32, 0.12) 100%
    );
  }

  /*
   * 黑色区域内容宽度与上方标题一致：
   * 最大宽度都是 1200px。
   */
  #voc-why .voc-why__inner {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 52px 24px 64px;
  }

  #voc-why .voc-why__layout {
    display: grid;
    grid-template-columns:
      minmax(270px, 360px)
      minmax(0, 1fr);
    align-items: start;
    gap: 40px;
  }

  /* ================================
     左侧按钮
  ================================= */

  #voc-why .voc-why__tabs {
    display: grid;
    gap: 12px;
  }

  #voc-why .voc-why__tab {
    appearance: none;
    position: relative;
    width: 100%;
    min-height: 74px;
    display: grid;
    grid-template-columns:
      44px
      minmax(0, 1fr)
      18px;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    color: #f3f4f6;
    background: var(--voc-button);
    font: inherit;
    font-size: 16px;
    font-weight: 650;
    line-height: 1.3;
    text-align: left;
    cursor: pointer;

    transition:
      transform 0.2s ease,
      background 0.2s ease,
      box-shadow 0.2s ease,
      border-color 0.2s ease;
  }

  #voc-why .voc-why__tab:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(2px);
  }

  #voc-why .voc-why__tab:focus-visible {
    outline: 3px solid rgba(244, 201, 0, 0.8);
    outline-offset: 3px;
  }

  #voc-why .voc-why__tab.is-active {
    color: #ffffff;
    background: var(--voc-blue);
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: 0 12px 28px rgba(13, 28, 132, 0.3);
    transform: translateX(4px);
  }

  #voc-why .voc-why__tab.is-active::before {
    content: "";
    position: absolute;
    left: -1px;
    width: 4px;
    height: 28px;
    border-radius: 0 4px 4px 0;
    background: var(--voc-yellow);
  }

  #voc-why .voc-why__tab-icon,
  #voc-why .voc-why__feature-icon {
    display: grid;
    place-items: center;
    color: currentColor;
  }

  #voc-why .voc-why__tab-icon {
    width: 44px;
    height: 44px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.07);
  }

  #voc-why .voc-why__tab-icon svg {
    width: 24px;
    height: 24px;
  }

  #voc-why .voc-why__tab i {
    color: var(--voc-yellow);
    font-style: normal;
    font-size: 20px;
    opacity: 0;
    transform: translateX(-5px);
    transition: 0.2s ease;
  }

  #voc-why .voc-why__tab.is-active i {
    opacity: 1;
    transform: none;
  }

  /* ================================
     右侧内容卡片
  ================================= */

  #voc-why .voc-why__card {
    min-width: 0;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 18px;
    background: var(--voc-panel);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.24);
  }

  #voc-why .voc-why__media {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #202633;
  }

  #voc-why .voc-why__media::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;

    background: linear-gradient(
      to top,
      rgba(15, 18, 28, 0.18),
      transparent 42%
    );
  }

  #voc-why .voc-why__media img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
    transition: opacity 0.16s ease;
  }

  #voc-why .voc-why__media img.is-changing {
    opacity: 0.35;
  }

  #voc-why .voc-why__copy {
    padding: 26px 30px 30px;
  }

  #voc-why .voc-why__title-row {
    display: flex;
    align-items: center;
    gap: 14px;
  }

  #voc-why .voc-why__feature-icon {
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    border-radius: 11px;
    color: var(--voc-yellow);
    background: rgba(244, 201, 0, 0.1);
  }

  #voc-why .voc-why__feature-icon svg {
    width: 25px;
    height: 25px;
  }

  #voc-why .voc-why__copy h3 {
    margin: 0;
    color: #ffffff;
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 700;
    line-height: 1.2;
  }

  #voc-why .voc-why__copy p {
    max-width: 680px;
    margin: 14px 0 0;
    color: #d7dbe4;
    font-size: 16px;
    line-height: 1.7;
  }

  /* ================================
     平板适配
  ================================= */

  @media (max-width: 900px) {
    #voc-why .voc-why__layout {
      grid-template-columns:
        minmax(230px, 290px)
        minmax(0, 1fr);
      gap: 24px;
    }

    #voc-why .voc-why__tab {
      padding: 12px 14px;
      font-size: 15px;
    }
  }

  /* ================================
     手机适配
  ================================= */

  @media (max-width: 767px) {
    .voc-why-heading {
      padding: 40px 20px 20px;
    }

    .voc-why-heading__eyebrow {
      margin-bottom: 8px;
      font-size: 11px;
    }

    .voc-why-heading h2 {
      font-size: 30px;
      letter-spacing: 0;
    }

    .voc-why-heading__description {
      margin-top: 10px;
      font-size: 14px;
      line-height: 1.6;
    }

    #voc-why .voc-why__backdrop {
      background-position: 68% top;
    }

    #voc-why .voc-why__inner {
      padding: 32px 18px 44px;
    }

    #voc-why .voc-why__layout {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    #voc-why .voc-why__tabs {
      width: 100%;
      grid-template-columns:
        repeat(2, minmax(0, 1fr));
      gap: 9px;
    }

    #voc-why .voc-why__tab {
      min-height: 64px;
      grid-template-columns:
        32px
        minmax(0, 1fr);
      gap: 9px;
      padding: 10px;
      font-size: 13px;
    }

    #voc-why .voc-why__tab:hover,
    #voc-why .voc-why__tab.is-active {
      transform: none;
    }

    #voc-why .voc-why__tab.is-active::before,
    #voc-why .voc-why__tab i {
      display: none;
    }

    #voc-why .voc-why__tab-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
    }

    #voc-why .voc-why__tab-icon svg {
      width: 19px;
      height: 19px;
    }

    #voc-why .voc-why__card {
      width: 100%;
      border-radius: 14px;
    }

    #voc-why .voc-why__media {
      aspect-ratio: 16 / 10;
    }

    #voc-why .voc-why__copy {
      padding: 21px 20px 24px;
    }

    #voc-why .voc-why__feature-icon {
      flex-basis: 38px;
      width: 38px;
      height: 38px;
    }

    #voc-why .voc-why__copy h3 {
      font-size: 24px;
    }

    #voc-why .voc-why__copy p {
      margin-top: 12px;
      font-size: 14px;
      line-height: 1.65;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    #voc-why * {
      transition: none !important;
    }
  }