.development-accordion{max-width:800px;margin:0 auto;font-family:inherit}.stage{border-radius:12px;margin-bottom:16px;overflow:hidden;box-shadow:0 6px 18px rgba(0,0,0,.08)}.stage-header{width:100%;background:linear-gradient(135deg,#5b8def,#6fc3f7);color:#fff;border:none;padding:18px 22px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-size:18px}.stage-header .age{font-weight:600}.stage-header .years{font-size:14px;opacity:.9;margin-left:10px}.stage-header .icon{font-size:26px;font-weight:300;transition:transform .3s ease}.stage-content{background:#fff;max-height:0;overflow:hidden;transition:max-height .35s ease}.stage-content p{padding:20px 22px;margin:0;line-height:1.6;color:#333}.stage.active .stage-content{max-height:300px}.stage.active .icon{transform:rotate(45deg)}