.learn-section{background:#f7f7f7;padding:96px 0;color:#121212}
.learn-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.learn-en{display:block;font-size:88px;font-weight:900;color:#e7e7e7;line-height:.9;letter-spacing:0}
.learn-heading h2{position:relative;font-size:38px;line-height:1.2;margin:-18px 0 18px}
.learn-heading p{margin:0;color:#666;font-size:16px}
.learn-topics{color:#666;font-size:14px;white-space:nowrap}
.learn-list{background:#fff;border:1px solid rgba(0,0,0,.06);border-radius:32px;box-shadow:0 22px 70px rgba(0,0,0,.07);overflow:hidden}
.learn-row{display:flex;justify-content:space-between;align-items:center;gap:28px;padding:36px 48px;text-decoration:none;color:inherit;border-bottom:1px solid #ededed;transition:background-color .24s ease}
.learn-row:last-child{border-bottom:0}.learn-row:hover,.learn-row:focus-visible{background:#fff7f7}.learn-row:focus-visible{outline:2px solid #e60012;outline-offset:-3px}.learn-row:active .learn-arrow{transform:translateX(2px) scale(.94)}
.learn-category{margin:0 0 9px;color:#666;font-size:12px;font-weight:600}.learn-category span{color:#e60012;margin:0 9px}
.learn-row h3{margin:0;font-size:20px;line-height:1.5;font-weight:700;overflow-wrap:anywhere}
.learn-arrow{display:grid;place-items:center;flex:0 0 32px;height:32px;border:1px solid #ddd;border-radius:50%;font-size:13px;color:#666;transition:background-color .24s ease,border-color .24s ease,color .24s ease,transform .32s cubic-bezier(.2,.8,.2,1),box-shadow .24s ease}
.learn-row:hover .learn-arrow,.learn-row:focus-visible .learn-arrow{background:#e60012;border-color:#e60012;color:#fff;transform:translateX(4px) scale(1.04);box-shadow:0 6px 16px rgba(230,0,18,.22)}
.article-page{margin:0;background:#f7f7f7;color:#121212;font:16px/1.85 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}
.article-page *{box-sizing:border-box}.article-page a{color:inherit;text-decoration:none}
.article-top{min-height:72px;background:#fff;border-bottom:1px solid #ededed;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px max(24px,calc((100vw - 1080px)/2));font-size:14px}
.article-logo{display:flex;align-items:center;gap:14px;font-weight:700}.article-logo img{width:112px;height:auto}.article-logo span{border-left:1px solid #ddd;padding-left:14px}
.article-sheet{max-width:1000px;margin:60px auto 80px;background:#fff;padding:64px 72px;border-radius:32px;box-shadow:0 24px 72px rgba(18,18,18,.07),0 2px 10px rgba(18,18,18,.035)}
.article-kicker{color:#d90010;font-size:14px;font-weight:700;margin:0 0 26px}
.article-sheet h1{font-size:44px;line-height:1.3;margin:0;font-weight:800;overflow-wrap:anywhere;text-wrap:balance;letter-spacing:0}
.article-summary{color:#555;margin:24px 0 0;font-size:18px}
.article-body{border-top:1px solid #e8e8e8;padding-top:32px;margin-top:42px;overflow-wrap:anywhere}
.article-body p,.article-body li{line-height:1.95}.article-body h2{font-size:26px;margin:36px 0 16px}.article-body h3{font-size:21px;margin:28px 0 12px}
.article-body img{max-width:100%;height:auto;display:block;margin:26px auto}
.article-body a{color:#cc0010;text-decoration:underline}.article-body blockquote{margin:24px 0;padding:14px 20px;background:#f5f5f5;color:#555}
.article-body pre{white-space:pre-wrap;background:#f5f5f5;padding:18px}.article-body table{width:100%;border-collapse:collapse}.article-body td,.article-body th{border:1px solid #ddd;padding:8px;text-align:left}
.article-footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;margin-top:48px;padding-top:24px;border-top:1px solid #e8e8e8;color:#666;font-size:14px}
.preview-notice{text-align:center;background:#fff0f1;color:#a6000d;padding:8px;font-size:14px}
@media(max-width:720px){.learn-section{padding:64px 0}.learn-heading{display:block}.learn-en{font-size:56px}.learn-heading h2{font-size:30px;margin-top:-12px}.learn-heading p{font-size:15px}.learn-topics{display:none}.learn-list{border-radius:24px}.learn-row{padding:24px 20px;gap:16px}.learn-row h3{font-size:17px}.learn-arrow{flex-basis:22px;height:22px;font-size:10.5px}.article-sheet{margin:24px 14px 44px;padding:30px 22px;border-radius:24px}.article-sheet h1{font-size:30px}.article-top{padding:12px 16px;gap:12px}.article-top>a:last-child{font-size:12px}.article-logo img{width:86px}.article-logo span{display:none}.article-body h2{font-size:23px}}
@media(prefers-reduced-motion:reduce){.learn-row,.learn-arrow{transition:none}}