:root{--paper:#f6f0e3;--white:#fffdf8;--ink:#202a25;--muted:#65716b;--green:#174b36;--green2:#2e7050;--wood:#a75e34;--blue:#283a5a;--red:#c94d3d;--purple:#6d5b8b;--line:#d8d0c1;--max:1240px;--shadow:0 18px 50px rgba(32,42,37,.1)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.78}a{color:inherit;text-underline-offset:4px}img{display:block;max-width:100%;height:auto}p{margin:.5em 0 1em}.site-header{position:sticky;top:0;z-index:30;background:rgba(246,240,227,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.topline{padding:5px max(18px,calc((100% - var(--max))/2));background:var(--ink);color:#edf5ef;display:flex;justify-content:space-between;font-size:12px}.navwrap{max-width:var(--max);margin:auto;padding:8px 18px;display:flex;align-items:center;gap:20px}.brand img{width:174px}.navwrap nav{margin-left:auto;display:flex;gap:2px}.navwrap nav a{padding:9px;font-size:13px;font-weight:800;text-decoration:none;border-bottom:2px solid transparent;white-space:nowrap}.navwrap nav a:hover,.navwrap nav a[aria-current]{border-color:var(--red);color:var(--green)}.menubtn{display:none}.crumb{max-width:var(--max);margin:18px auto 0;padding:0 18px;display:flex;gap:9px;font-size:13px;color:var(--muted)}.hero,.subhero,.section{max-width:var(--max);margin:auto;padding:68px 18px}.hero{min-height:680px;display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}.hero h1,.subhero h1{font-size:clamp(39px,5vw,67px);line-height:1.1;letter-spacing:-.05em;margin:0 0 22px}.hero-lead,.subhero>div>p,.lead{font-size:18px;line-height:1.95;color:#39463f}.eyebrow{display:block;color:var(--red);font:800 12px/1.2 Arial;letter-spacing:.16em;margin-bottom:13px}.actions{display:flex;align-items:center;gap:11px;flex-wrap:wrap;margin:28px 0}.btn{display:inline-flex;padding:10px 17px;min-height:45px;align-items:center;text-decoration:none;font-weight:800;border:1px solid var(--ink);background:var(--white)}.btn.green{background:var(--green);color:white;border-color:var(--green)}.btn.wood{background:var(--wood);color:white;border-color:var(--wood)}.evidence-tags{display:flex;gap:7px;flex-wrap:wrap}.evidence-tags span{border:1px solid var(--line);background:var(--white);padding:5px 8px;font-size:12px}.herofig{margin:0;max-width:480px;justify-self:end}.herofig img,.media img{border:1px solid var(--line);background:var(--white)}figcaption{font-size:12px;color:var(--muted);line-height:1.65;margin-top:8px}.section{border-top:1px solid var(--line)}.section h2{font-size:clamp(29px,4vw,46px);line-height:1.2;letter-spacing:-.035em;margin:.1em 0 .55em}.section-head{max-width:820px;margin-bottom:28px}.section-head>p{font-size:17px;color:var(--muted)}.question-columns,.duel{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}.question-columns>div,.duel>div{background:var(--white);padding:28px}.question-columns h3{color:var(--red)}.question-columns p{font-size:18px;border-bottom:1px solid var(--line);padding:10px 0}.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}.split.reverse>div:first-child{order:2}.split.reverse>.media{order:1}.split>.media{max-width:440px;justify-self:end}.split.reverse>.media{justify-self:start}.layers{display:grid;grid-template-columns:1fr 1fr;border-top:2px solid var(--ink)}.layers article{padding:18px 20px;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}.layers b,.featuregrid b{color:var(--red);font:800 12px Arial}.paper{background:var(--white);max-width:calc(var(--max) - 36px);padding-left:46px;padding-right:46px;box-shadow:var(--shadow)}.paper>.media{max-width:400px;margin:28px 0}.pitchdesk,.wooddesk,.no-touch{display:grid;grid-template-columns:1fr 420px;gap:45px;align-items:center}.pitchdesk{background:#dfe9df;max-width:calc(var(--max) - 36px);padding:48px}.wooddesk{background:#ead7bc;max-width:calc(var(--max) - 36px);padding:48px}.desklinks{display:flex;gap:8px;flex-wrap:wrap}.desklinks a{padding:8px 11px;background:var(--white);border:1px solid var(--line)}table{border-collapse:collapse;width:100%;background:var(--white)}th,td{padding:13px 15px;border:1px solid var(--line);text-align:left;vertical-align:top}th{background:#e8e4d9}.flow{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:22px 0}.flow span{padding:8px 10px;background:var(--white);border:1px solid var(--line)}.flow.vertical{flex-direction:column;align-items:stretch;text-align:center}.storylist{display:grid;gap:26px}.story{display:grid;grid-template-columns:330px 1fr;gap:28px;padding-bottom:30px;border-bottom:1px solid var(--line)}.story>img{width:330px;height:210px;object-fit:cover;border:1px solid var(--line)}.meta{display:flex;gap:9px;font-size:12px;color:var(--muted)}.meta span{background:#dfe9df;color:var(--green);font-weight:800;padding:3px 8px}.story h3{font-size:24px;line-height:1.35;margin:8px 0}.summary{font-weight:700;color:#37443d}.no-touch blockquote,.editorial blockquote,.articlebody blockquote{font-size:23px;font-weight:800;margin:20px 0;padding:18px 24px;border-left:4px solid var(--red);background:var(--white)}.modelband{max-width:none;background:var(--blue);color:white;padding-left:max(18px,calc((100% - var(--max))/2));padding-right:max(18px,calc((100% - var(--max))/2));display:flex;justify-content:space-between;gap:40px;align-items:center}.modelband p{color:#d7deea}.modelband a{padding:10px 14px;background:white;color:var(--blue);font-weight:800}.editorial{max-width:940px}.editorial p{font-size:19px}.company{display:grid;grid-template-columns:1.2fr .8fr;gap:48px}.muted{color:var(--muted);font-size:13px}.faqlist{display:grid;grid-template-columns:1fr 1fr;gap:9px}.faqlist details{background:var(--white);border:1px solid var(--line)}.faqlist summary{padding:16px 18px;font-weight:800;cursor:pointer}.faqlist details p{padding:0 18px 12px;color:var(--muted)}.source-list{columns:2;gap:28px}.source-list li{break-inside:avoid;margin-bottom:11px}.footer{background:#18241e;color:#eef3ef;padding:52px 18px 20px}.footergrid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:45px}.footergrid img{filter:brightness(0) invert(1);width:180px}.footergrid p{font-size:13px;color:#b9c8bf}.footergrid>div:nth-child(2){display:flex;flex-direction:column}.footergrid a{font-size:13px}.copyright{max-width:var(--max);margin:35px auto 0;padding-top:17px;border-top:1px solid #39483f;font-size:12px}.backtop{position:fixed;right:20px;bottom:20px;width:44px;height:44px;background:var(--green);color:white;border:0;font-size:20px;opacity:0;pointer-events:none}.backtop.show{opacity:1;pointer-events:auto}.subhero{display:grid;grid-template-columns:1fr 420px;gap:45px;align-items:center;padding-top:48px}.subhero h1{font-size:clamp(36px,5vw,57px)}.submedia{max-width:420px}.steps{list-style:none;padding:0}.steps li{display:grid;grid-template-columns:145px 1fr;gap:15px;padding:11px 0;border-bottom:1px solid var(--line)}.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}.case-grid>div{padding:20px;background:var(--paper)}.case-line{display:flex;align-items:center;gap:9px;margin:22px 0}.case-line span{flex:1;padding:14px;background:var(--paper);text-align:center}.case-line i{font-style:normal;color:var(--red)}.sequence{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);margin:20px 0}.sequence span{padding:15px;background:var(--paper);text-align:center}.align-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin:22px 0}.align-grid span{background:var(--white);padding:18px;text-align:center}.badgood{display:grid;grid-template-columns:1fr 1fr;gap:10px}.badgood>div{padding:24px;background:var(--paper);border-left:4px solid var(--red)}.badgood>div+div{border-color:var(--green)}.filters{display:flex;gap:7px;flex-wrap:wrap}.filters button{padding:8px 11px;background:var(--paper);border:1px solid var(--line)}.filters button.active{background:var(--green);color:white}.timeline{list-style:none;padding:0;border-top:2px solid var(--ink)}.timeline li{display:grid;grid-template-columns:145px 120px 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.timeline time,.timeline span{font-size:12px;color:var(--muted)}.timeline a{font-weight:800}.fullarticle{scroll-margin-top:120px;border-top:3px solid var(--ink);padding:64px 0}.fullarticle h2{font-size:clamp(30px,4vw,48px)}.facts{display:flex;gap:8px;flex-wrap:wrap;font-size:12px;color:var(--muted)}.fullarticle>.media{max-width:400px;margin:28px 0}.abstract{max-width:900px;background:#dfe9df;padding:22px;font-size:17px}.articlebody{max-width:900px}.articlebody p,.articlebody li{font-size:17px;line-height:2}.articlebody h3{font-size:25px;margin-top:32px}.sourcebox{max-width:900px;margin-top:26px;padding:16px;border:1px solid var(--line);font-size:13px;color:var(--muted)}.fullarticle footer{display:flex;gap:13px;flex-wrap:wrap;margin-top:20px}.fullarticle footer a{font-weight:800}.featuregrid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}.featuregrid article{padding:22px;background:var(--white)}.featuregrid small{color:var(--red)}.notice{max-width:calc(var(--max) - 36px);background:#dfe9df;display:flex;align-items:center;justify-content:space-between;gap:30px;padding:38px}.downloadgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.downloadgrid article{background:var(--white);padding:16px;border:1px solid var(--line)}.downloadgrid .media img{height:170px;object-fit:cover}.problem{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;padding:28px 0;border-bottom:1px solid var(--line)}.problem .media{max-width:360px}
@media(max-width:1020px){.navwrap nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--white);grid-template-columns:1fr 1fr;padding:15px}.navwrap nav.open{display:grid}.menubtn{display:flex;margin-left:auto;align-items:center;gap:4px;padding:8px;background:var(--white);border:1px solid var(--line)}.menubtn i{width:4px;height:4px;background:var(--ink)}.menubtn b{margin-left:4px}.hero{grid-template-columns:1fr}.herofig{justify-self:start}.pitchdesk,.wooddesk,.no-touch{grid-template-columns:1fr}.featuregrid{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.topline span:last-child{display:none}.brand img{width:145px}.hero,.subhero,.section{padding:44px 15px}.hero h1,.subhero h1{font-size:37px}.hero-lead,.lead{font-size:16px}.split,.subhero,.company{grid-template-columns:1fr}.split.reverse>div:first-child,.split.reverse>.media{order:initial}.split>.media,.submedia,.herofig{max-width:100%;justify-self:stretch}.question-columns,.duel,.faqlist,.badgood{grid-template-columns:1fr}.paper,.pitchdesk,.wooddesk,.notice{max-width:calc(100% - 18px);padding:34px 18px}.layers{grid-template-columns:1fr}.story{grid-template-columns:1fr}.story>img{width:100%;height:auto}.modelband{display:block}.modelband a{display:inline-block;margin-top:10px}.source-list{columns:1}.footergrid{grid-template-columns:1fr}.case-grid,.align-grid{grid-template-columns:1fr}.case-line{flex-direction:column}.case-line i{transform:rotate(90deg)}.sequence{grid-template-columns:1fr}.timeline li{grid-template-columns:1fr;gap:2px}.featuregrid,.downloadgrid{grid-template-columns:1fr}.steps li{grid-template-columns:1fr;gap:2px}.problem{grid-template-columns:1fr}.articlebody p,.articlebody li{font-size:16px}}