/* 新增：全站左侧常驻热门问答卡片。与“常用工具”分离，右侧客服不受影响。 */
.qa-float{position:fixed;z-index:108;left:14px;top:142px;width:254px;font-family:inherit;line-height:1.45;color:#1f3657;box-sizing:border-box}
.qa-float[hidden]{display:none!important}
.qa-shell{box-shadow:0 18px 50px rgba(19,45,101,.16);background:#fff;border:1px solid #dce7fa;border-radius:17px;overflow:hidden}
.qa-head{background:linear-gradient(118deg,#102e69,#365ff0);color:#fff;padding:15px 15px 13px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.qa-head strong{font-size:15px;letter-spacing:.2px;display:flex;align-items:center;gap:8px}
.qa-head strong:before{content:'?';display:grid;place-items:center;font-size:13px;font-weight:900;border:1px solid #ffffff87;border-radius:50%;width:21px;height:21px}
.qa-head small{display:block;font-size:11px;color:#cfddff;margin-top:4px}
.qa-close{border:1px solid #ffffff6b;background:#ffffff15;color:#fff;border-radius:7px;width:26px;height:26px;cursor:pointer;font-size:18px;line-height:1}
.qa-list{padding:7px 9px 11px;list-style:none;margin:0}
.qa-list li+li{border-top:1px solid #e8eef9}
.qa-list a{padding:11px 7px 10px;display:block;color:#253a5e!important;text-decoration:none!important;border-radius:9px;transition:background .18s}
.qa-list a:hover,.qa-list a:focus-visible{background:#f0f5ff;outline-offset:2px}
.qa-list .qa-item-title{display:flex;justify-content:space-between;align-items:flex-start;gap:8px;font-size:12.5px;font-weight:750;line-height:1.5}
.qa-list .qa-arrow{color:#315cf8;font-size:15px;flex-shrink:0}
.qa-list .qa-desc{display:block;margin-top:3px;font-size:11px;color:#7b8ca5;line-height:1.45}
.qa-foot{font-size:10px;text-align:center;background:#f5f8ff;color:#74849b;padding:8px;border-top:1px solid #e5edfc}
.qa-toggle{position:absolute;left:0;top:0;display:none;align-items:center;gap:7px;border:0;border-radius:12px;background:linear-gradient(115deg,#122d66,#305bdd);color:white;box-shadow:0 9px 24px #1a3e8561;cursor:pointer;padding:11px 13px;font-weight:800;font-size:13px}
.qa-float.is-collapsed{width:auto}
.qa-float.is-collapsed .qa-shell{display:none}
.qa-float.is-collapsed .qa-toggle{display:flex}
/* 桌面环境的常用工具下移，避免与新问答卡片重叠。 */
@media(min-width:981px){.floating-tools{top:auto!important;bottom:20px!important;transform:none!important}.float-tools{top:auto!important;bottom:20px!important;transform:none!important}}
@media(max-width:980px){.qa-float{left:12px;top:auto;bottom:78px;width:min(310px,calc(100vw - 24px))}.qa-float .qa-toggle{display:flex}.qa-float:not(.is-collapsed) .qa-toggle{display:none}.qa-float.is-collapsed{bottom:78px}.qa-shell{max-height:min(60vh,410px);overflow:auto}}
@media(min-width:981px) and (max-width:1230px){.qa-float{top:120px;width:228px}.qa-list .qa-item-title{font-size:12px}.qa-head{padding:12px}}
@media(max-height:680px) and (min-width:981px){.qa-float{top:85px}.qa-list a{padding:7px 6px}}
@media(prefers-reduced-motion:reduce){.qa-list a{transition:none}}