.landing-qa{--ink:var(--commercial-ink,#16191d);--muted:var(--commercial-muted,#626873);--soft-line:#d8dce2;grid-template-columns:minmax(200px,.72fr) minmax(0,1.45fr);align-items:start;column-gap:clamp(32px,6vw,90px);width:min(89%,1200px);margin-inline:auto;padding:24px 0 clamp(52px,7vw,96px);display:grid}.landing-qa,.landing-qa *{box-sizing:border-box}.landing-qa .qa-heading{grid-column:1/-1;margin-bottom:clamp(24px,4vw,48px)}.landing-qa .qa-back{min-height:44px;color:var(--muted);align-items:center;gap:8px;font-size:14px;display:inline-flex}.landing-qa .qa-back:hover{text-underline-offset:3px;text-decoration:underline}.landing-qa .qa-heading h1{color:var(--ink);letter-spacing:-.055em;margin:12px 0;font-size:clamp(36px,5vw,66px);font-weight:570;line-height:1.06}.landing-qa[lang=zh-CN] .qa-heading h1{letter-spacing:-.02em;line-height:1.2}.landing-qa .qa-heading p{max-width:70ch;color:var(--muted);margin:0;font-size:16px;line-height:1.6}.landing-qa .qa-filters{gap:7px;margin-top:0;display:grid}.landing-qa .qa-filters label{font-size:13px;font-weight:560}.landing-qa .qa-filters label:not(:first-child){margin-top:10px}.landing-qa :is(.qa-search,select){width:100%;min-width:0;min-height:46px;color:var(--ink);font:inherit;background:#fff;border:1px solid #aaaeb2;border-radius:7px;font-size:15px}.landing-qa .qa-search{align-items:center;gap:10px;padding-inline:13px;display:flex}.landing-qa .qa-search svg{color:var(--muted);flex:none}.landing-qa .qa-search input{font:inherit;width:100%;min-width:0;min-height:44px;color:var(--ink);background:0 0;border:0;outline:none}.landing-qa select{padding-inline:11px}.landing-qa .qa-search:focus-within{outline:2px solid var(--ink);outline-offset:2px}.landing-qa select:focus-visible{outline:2px solid var(--ink);outline-offset:2px}.landing-qa .qa-meta{min-height:46px;color:var(--muted);justify-content:space-between;align-items:center;font-size:13px;display:flex}.landing-qa button.qa-reset,.landing-qa .qa-answer-link,.landing-qa .qa-empty a{text-underline-offset:3px;text-decoration:underline}.landing-qa button.qa-reset{min-height:44px;padding-inline:8px}.landing-qa .qa-topic{border-bottom:1px solid var(--soft-line)}.landing-qa .qa-topic:first-child{border-top:1px solid var(--soft-line)}.landing-qa summary{cursor:pointer;align-items:center;gap:14px;list-style:none;display:flex}.landing-qa summary::-webkit-details-marker{display:none}.landing-qa summary>svg{flex:none}.landing-qa .qa-topic>summary{min-height:54px;padding:15px 6px;font-size:clamp(16px,1.5vw,20px);font-weight:550;line-height:1.35}.landing-qa .qa-topic-count{color:var(--muted);font-variant-numeric:tabular-nums;margin-left:auto;font-size:13px;font-weight:400}.landing-qa .qa-topic[open]>summary>svg{transform:rotate(180deg)}.landing-qa .qa-entries{padding:0 4px 16px 14px}.landing-qa .qa-item{border-top:1px solid var(--soft-line)}.landing-qa .qa-item>summary{justify-content:space-between;min-height:48px;padding:12px 3px;font-size:15px;font-weight:500;line-height:1.45}.landing-qa .qa-item[open]>summary>svg{transform:rotate(45deg)}.landing-qa .qa-answer{color:#454b53;overflow-wrap:anywhere;max-width:72ch;padding:0 20px 16px 3px;font-size:15px}.landing-qa .qa-answer p{line-height:1.65}.landing-qa .qa-answer-link{margin-top:8px;display:inline-block}.landing-qa .qa-image{margin-top:14px}.landing-qa .qa-image img{border:1px solid var(--soft-line);border-radius:6px;width:100%;height:auto;display:block}.landing-qa figcaption{color:var(--muted);margin-top:6px;font-size:12px}.landing-qa .qa-empty{border-block:1px solid var(--soft-line);padding:28px 0}.landing-qa .qa-empty h3{font-size:20px}.landing-qa .qa-empty p{margin:8px 0}@media (max-width:720px){.landing-qa{grid-template-columns:minmax(0,1fr);gap:14px;padding-top:8px}.landing-qa .qa-heading{margin-bottom:4px}.landing-qa :is(.qa-search input,select){font-size:16px}.landing-qa .qa-entries{padding-left:8px}}.commercial-brand .landing-qa .qa-search input:focus-visible{box-shadow:none;outline:none}.landing-qa .qa-demos{border-top:1px solid var(--soft-line);margin-top:5px}.landing-qa .qa-demos summary{justify-content:space-between;min-height:45px;font-size:14px}.landing-qa .qa-demos[open] svg{transform:rotate(180deg)}.landing-qa .qa-demos ul{flex-wrap:wrap;gap:0 18px;margin:0;padding:0;list-style:none;display:flex}.landing-qa .qa-demos a{text-underline-offset:3px;align-items:center;min-height:44px;font-size:14px;text-decoration:underline;display:inline-flex}