html{--oo_bg:#0c141c;--oo_fg:#e2e8ee;--oo_p:#1368b7;--oo_f:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;--oo_hf:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;--oo_pt:#4ba4f7;--oo_w:1100px;--oo_on:#f8fafb;--oo_mu:#99a7b8;--oo_g:1rem;--oo_bd:#303f50;color-scheme:dark;--oo_p2:#144bc2;--oo_sf:#1a232e;--oo_r:10px;--oo_a:#09f6af}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:3.6rem}
body{background:var(--oo_bg);overflow-wrap:anywhere;font:16px/1.75 var(--oo_f);margin:0;color:var(--oo_fg)}
a{text-underline-offset:3px;color:var(--oo_pt)}
a:focus-visible,summary:focus-visible{outline:2px solid var(--oo_pt);outline-offset:3px;border-radius:2px}
svg{display:block}
h2,h3,h1{line-height:1.3;font-family:var(--oo_hf);margin:0;color:var(--oo_fg)}
.oo_skip{top:0;position:absolute;left:-999px}
.oo_skip:focus{z-index:20;background:var(--oo_sf);padding:.45rem .9rem;top:.9rem;left:.9rem}
.oo_progress{position:fixed;top:0;left:0;height:3px;width:100%;background:var(--oo_a);transform:scaleX(0);transform-origin:0 50%;z-index:15}
.oo_shell{margin:0 auto;max-width:var(--oo_w);padding:0 .9rem}
/* masthead */
.oo_mast{padding:calc(var(--oo_g)*1.2) 0 0}
.oo_dateline{font-size:.7rem;justify-content:space-between;border-bottom:1px solid var(--oo_bd);gap:.9rem;letter-spacing:.06em;flex-wrap:wrap;padding-bottom:.45rem;color:var(--oo_mu);display:flex}
.oo_brand{align-items:center;padding:calc(var(--oo_g)*1.4) 0 calc(var(--oo_g)*1.1);text-decoration:none;gap:.7rem;justify-content:center;display:flex;color:var(--oo_fg)}
.oo_brand .oo_logo{height:44px;width:44px;flex:none}
.oo_brand b{font-family:var(--oo_hf);letter-spacing:.04em;font-size:clamp(1.7rem,5.4vw,3.05rem);font-weight:800;line-height:1.1}
.oo_rule{height:6px;border-bottom:1px solid var(--oo_fg);border-top:3px solid var(--oo_fg);margin:0}
/* category bar */
.oo_cats{top:0;z-index:10;background:var(--oo_bg);border-bottom:1px solid var(--oo_bd);position:sticky}
.oo_cats ul{margin:0 auto;list-style:none;max-width:var(--oo_w);gap:.2rem;padding:0 .9rem;display:flex;overflow-x:auto;scrollbar-width:none}
.oo_cats ul::-webkit-scrollbar{display:none}
.oo_cats a{white-space:nowrap;display:block;font-size:.8rem;padding:.65rem .75rem;text-decoration:none;font-weight:600;border-bottom:2px solid transparent;color:var(--oo_fg)}
.oo_cats a:hover{color:var(--oo_pt);border-bottom-color:var(--oo_p)}
.oo_cats li:first-child a{padding-left:0}
/* body grid */
.oo_body{padding-bottom:calc(var(--oo_g)*3);padding-top:calc(var(--oo_g)*2.2);grid-template-columns:minmax(0,1fr) 300px;gap:calc(var(--oo_g)*3);display:grid}
.oo_main{min-width:0}
.oo_kicker{font-size:.7rem;text-transform:uppercase;margin:0 0 .7rem;font-weight:700;display:inline-block;color:var(--oo_a);letter-spacing:.18em}
.oo_kicker::before{vertical-align:middle;background:var(--oo_a);height:2px;width:1.45rem;content:"";margin-right:.55rem;display:inline-block}
.oo_lead h1{font-size:clamp(1.6rem,4.6vw,2.7rem);letter-spacing:-.005em;font-weight:800;line-height:1.18}
.oo_dek{line-height:1.7;color:var(--oo_mu);max-width:40em;font-size:1.05rem;margin:.9rem 0 0}
.oo_byline{border-bottom:1px solid var(--oo_bd);flex-wrap:wrap;border-top:1px solid var(--oo_bd);padding:.65rem 0;color:var(--oo_mu);display:flex;font-size:.75rem;gap:.35rem 1.1rem;margin:1rem 0 0}
.oo_cover{margin:calc(var(--oo_g)*1.6) 0 0}
.oo_cover_art{overflow:hidden;aspect-ratio:3/2;border-radius:var(--oo_r);background:linear-gradient(135deg,color-mix(in srgb,var(--oo_p) 16%,var(--oo_bg)),color-mix(in srgb,var(--oo_p2) 6%,var(--oo_sf)))}
.oo_cover_art .oo_decor{width:100%;height:100%}
.oo_cover figcaption{border-left:2px solid var(--oo_a);padding-left:.65rem;font-size:.7rem;margin-top:.45rem;color:var(--oo_mu)}
/* reading */
.oo_read{margin-top:calc(var(--oo_g)*2.4)}
.oo_article{font-family:var(--oo_hf);line-height:1.95;font-size:.95rem;max-width:40em}
.oo_article+.oo_article{padding-top:calc(var(--oo_g)*2.2);border-top:1px solid var(--oo_bd);margin-top:calc(var(--oo_g)*2.6)}
.oo_article h2{font-size:clamp(1.25rem,3vw,1.65rem);font-weight:800;margin-bottom:.9rem}
.oo_article h3{padding-left:.65rem;margin:1.6rem 0 .35rem;font-size:1.05rem;border-left:3px solid var(--oo_p)}
.oo_article p{margin:0 0 .95rem}
.oo_article ul,.oo_article ol{margin:0 0 1rem;padding-left:1.15rem}
.oo_article li{margin:.25rem 0}
.oo_article li::marker{color:var(--oo_pt)}
.oo_article>p:first-of-type::first-letter{margin:.08em .12em 0 0;float:left;font-size:3.3em;color:var(--oo_pt);font-weight:800;line-height:.9}
/* sections in main */
.oo_sec{margin-top:calc(var(--oo_g)*3.2)}
.oo_sec_h{padding-top:.55rem;margin-bottom:1.1rem;border-top:3px solid var(--oo_fg);gap:.7rem;display:flex;align-items:baseline}
.oo_sec_h h2{font-size:1.3rem;font-weight:800}
.oo_sec_h span{white-space:nowrap;font-size:.7rem;color:var(--oo_mu);letter-spacing:.16em}
.oo_sub{margin:-.4rem 0 1.15rem;font-size:.85rem;color:var(--oo_mu)}
.oo_pulls{grid-template-columns:repeat(2,minmax(0,1fr));gap:calc(var(--oo_g)*1.2);display:grid}
.oo_note{border-top:4px solid var(--oo_p);background:var(--oo_sf);position:relative;border-radius:0 0 var(--oo_r) var(--oo_r);padding:1.45rem 1rem 1rem}
.oo_note.oo_con{border-top-color:var(--oo_a)}
.oo_note.oo_tip_n{border-top-color:var(--oo_mu)}
.oo_note::before{color:color-mix(in srgb,var(--oo_p) 35%,transparent);top:-.1rem;right:.8rem;content:"\201C";position:absolute;font:800 3.25rem/1 var(--oo_hf)}
.oo_verdict{color:var(--oo_pt);letter-spacing:.1em;font-weight:700;font-size:.65rem}
.oo_note.oo_con .oo_verdict{color:var(--oo_a)}
.oo_note h3{font-size:1rem;margin:.3rem 0 .4rem;line-height:1.45}
.oo_note p{font-size:.85rem;margin:0;color:var(--oo_mu)}
.oo_stepset h3{margin-bottom:.7rem;font-size:1rem}
.oo_steps{list-style:none;padding:0;margin:0;counter-reset:oo_st}
.oo_steps li{position:relative;margin-left:.9rem;padding:0 0 1rem 2.7rem;counter-increment:oo_st;border-left:1px dashed var(--oo_bd)}
.oo_steps li:last-child{border-left-color:transparent}
.oo_steps li::before{content:counter(oo_st);position:absolute;left:-1rem;top:0;width:1.8rem;height:1.8rem;border-radius:50%;background:var(--oo_bg);border:2px solid var(--oo_p);display:grid;place-items:center;font-weight:800;font-size:.8rem;color:var(--oo_pt)}
.oo_steps b,.oo_steps strong{display:block;padding-top:.2rem}
.oo_steps p{font-size:.85rem;color:var(--oo_mu);margin:.2rem 0 0}
.oo_tablewrap{overflow-x:auto;border:1px solid var(--oo_bd);border-radius:var(--oo_r)}
.oo_compare{width:100%;border-collapse:collapse;font-size:.85rem;min-width:27rem}
.oo_compare caption{caption-side:top;text-align:left;padding:.65rem .8rem;font-weight:700}
.oo_compare th,.oo_compare td{vertical-align:top;text-align:left;border-top:1px solid var(--oo_bd);padding:.55rem .8rem}
.oo_compare thead th{background:var(--oo_sf);letter-spacing:.04em;font-size:.75rem}
.oo_compare tbody th{font-weight:600}
.oo_letters{gap:0;display:grid}
.oo_letter{padding:.9rem 0;border-bottom:1px solid var(--oo_bd)}
.oo_letter h3{gap:.55rem;font-size:.95rem;display:flex}
.oo_letter h3::before{color:var(--oo_on);background:var(--oo_p);width:1.35rem;margin-top:.1rem;font-size:.7rem;place-items:center;height:1.35rem;content:"问";flex:none;border-radius:var(--oo_r);display:grid}
.oo_letter p{margin:.4rem 0 0 1.9rem;color:var(--oo_mu)}
/* sidebar */
.oo_side{flex-direction:column;gap:calc(var(--oo_g)*1.8);display:flex;min-width:0}
.oo_box h2,.oo_latest h2{font-family:var(--oo_f);font-size:.7rem;border-bottom:2px solid var(--oo_fg);margin:0 0 .7rem;font-weight:800;letter-spacing:.18em;padding-bottom:.4rem}
.oo_dl{background:var(--oo_sf);border:1px solid var(--oo_bd);border-radius:var(--oo_r);padding:1rem}
.oo_dl h2{border-bottom-color:var(--oo_p)}
.oo_dl p{margin:0 0 .7rem;color:var(--oo_mu);font-size:.75rem}
.oo_dl ul{gap:.45rem;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr}
.oo_dl a{display:flex;align-items:center;gap:.4rem;padding:.55rem .6rem;border-radius:var(--oo_r);background:var(--oo_bg);border:1px solid var(--oo_bd);color:var(--oo_fg);text-decoration:none;font-size:.8rem;font-weight:600}
.oo_dl a:hover{border-color:var(--oo_p)}
.oo_dl svg{width:18px;height:18px;flex:none;fill:none;stroke:var(--oo_pt);stroke-width:1.8}
.oo_gloss{gap:.7rem;margin:0;display:grid}
.oo_gloss dt{font-size:.85rem;font-weight:700}
.oo_gloss dd{margin:.1rem 0 0;line-height:1.6;color:var(--oo_mu);font-size:.75rem}
.oo_rel{flex-direction:column;display:flex}
.oo_rel a{border-bottom:1px dotted var(--oo_bd);font-size:.85rem;text-decoration:none;color:var(--oo_fg);padding:.45rem 0}
.oo_rel a::before{content:"→";margin-right:.45rem;color:var(--oo_pt)}
.oo_rel a:hover{color:var(--oo_pt)}
.oo_latest ul{counter-reset:oo_lt;list-style:none;padding:0;margin:0}
.oo_latest li{counter-increment:oo_lt;padding:.5rem 0;font-size:.85rem;border-bottom:1px solid var(--oo_bd);gap:.65rem;display:flex;line-height:1.5}
.oo_latest li::before{font:800 1.15rem/1 var(--oo_hf);min-width:1rem;content:counter(oo_lt);color:var(--oo_a)}
.oo_latest a{text-decoration:none;color:var(--oo_fg)}
.oo_latest a:hover{text-decoration:underline;color:var(--oo_pt)}
.oo_tags{flex-wrap:wrap;gap:.35rem;display:flex}
.oo_tags a{font-size:.75rem;padding:.25rem .6rem;border:1px solid var(--oo_bd);border-radius:999px;color:var(--oo_mu);text-decoration:none}
.oo_tags a:nth-child(3n+1){font-size:.85rem;color:var(--oo_fg)}
.oo_tags a:hover{border-color:var(--oo_p);color:var(--oo_pt)}
/* colophon */
.oo_colophon{border-top:1px solid var(--oo_bd);padding:calc(var(--oo_g)*2) .9rem calc(var(--oo_g)*2.4);text-align:center;color:var(--oo_mu);font-size:.75rem}
.oo_colophon .oo_logo{height:28px;width:28px;margin:0 auto .45rem}
.oo_colophon b{display:block;font-size:1rem;font-family:var(--oo_hf);letter-spacing:.05em;color:var(--oo_fg)}
.oo_colophon p{margin:.25rem 0}
@media (max-width:900px){
.oo_body{gap:calc(var(--oo_g)*2.6);grid-template-columns:minmax(0,1fr)}
.oo_side{grid-template-columns:repeat(auto-fit,minmax(13.5rem,1fr));display:grid}
}
@media (max-width:560px){
body{font-size:15px}
.oo_pulls{grid-template-columns:minmax(0,1fr)}
.oo_article{line-height:1.85;font-size:.9rem}
.oo_dateline span:last-child{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.oo_progress{display:none}}
.oo_mast2_in{align-items:center;border-bottom:3px double var(--oo_fg);justify-content:space-between;padding:.8rem 0 .7rem;gap:.9rem;display:flex}
.oo_mast2 .oo_brand{justify-content:flex-start;padding:0}
.oo_mast2 .oo_brand b{font-size:clamp(1.25rem,3.4vw,1.9rem)}
.oo_mast2 .oo_dateline{align-items:flex-end;flex-direction:column;border:0;padding:0;gap:.1rem}
.oo_mast3 .oo_brand{padding-top:1.1rem}
.oo_pulls_1{grid-template-columns:1fr}
.oo_letters_2{gap:1.1rem;grid-template-columns:repeat(2,minmax(0,1fr))}
.oo_colophon2{margin:0 auto;gap:1.8rem;text-align:left;padding-right:.9rem;max-width:var(--oo_w);padding-left:.9rem;display:grid;grid-template-columns:1fr 1fr}
.oo_colophon2 .oo_brand{justify-content:flex-start;padding:0 0 .45rem}
.oo_colophon2 .oo_brand b{font-size:1.25rem}
@media (max-width:640px){.oo_colophon2,.oo_letters_2{grid-template-columns:1fr}.oo_mast2_in{flex-direction:column;align-items:flex-start}.oo_mast2 .oo_dateline{align-items:flex-start}}
@media (min-width:1024px){.oo_body{grid-template-columns:300px minmax(0,1fr)}.oo_side{order:-1}}
.oo_cover_art{aspect-ratio:21/9}.oo_mast .oo_brand{justify-content:flex-start}
.oo_ext{margin:.8rem 0 0;color:var(--oo_mu);font-size:.75rem}.oo_ext span{opacity:.8;margin-right:.45rem}.oo_ext a{color:var(--oo_mu)}
h1{text-wrap:balance}