*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:#333;font-family:system-ui,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:#f45132}img{max-width:100%}button{font:inherit;cursor:pointer}.container{width:calc(100% - 48px);max-width:1120px;margin:0 auto;min-width:0}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 16px rgba(0,0,0,.05)}.topbar{height:70px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;flex-shrink:0;max-width:150px}.brand img{height:38px;width:auto;max-width:145px;object-fit:contain}.brand strong,.footer-brand{font-size:26px;font-weight:850;color:#1a1a1a;white-space:nowrap}.brand span,.footer-brand span{color:#f45132}.desktop-nav{display:flex;gap:27px;white-space:nowrap;align-items:center;margin:auto;font-size:14px;font-weight:650}.desktop-nav a{height:70px;display:flex;align-items:center;position:relative}.desktop-nav a.active,.subnav a.active{color:#f45132}.desktop-nav a.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background:#f45132}.join-btn,.primary-btn{background:#f45132;color:#fff!important;border-radius:50px;padding:7px 24px;font-weight:700;white-space:nowrap;text-align:center}.join-btn:hover,.primary-btn:hover{background:#ff684e}.subnav{background:#f6f7f9}.subnav-content{height:44px;display:flex;align-items:center;gap:27px;overflow-x:auto;white-space:nowrap;scrollbar-width:none;font-size:13px;color:#666}.subnav-content::-webkit-scrollbar{display:none}.menu-toggle{display:none;background:none;border:0;width:38px;height:38px;padding:9px;flex-direction:column;justify-content:space-around}.menu-toggle span{display:block;height:2px;background:#333;width:100%}.mobile-drawer,.drawer-mask{display:none}.hero{padding:42px 0;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center;border-bottom:1px solid #eee}.hero h1{font-size:38px;line-height:1.35;letter-spacing:-.5px;color:#1a1a1a;margin:12px 0 20px}.hero p{color:#555;font-size:16px}.eyebrow{font-weight:750;font-size:12px;color:#f45132;letter-spacing:2px}.section{padding:36px 0;border-bottom:1px solid #f0f0f0}.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.section-head h2{margin:0;font-size:25px;color:#1a1a1a}.section-head>a,.read-more{color:#e8452c;font-size:14px;font-weight:650}.grid{display:grid;gap:18px;min-width:0}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{border:1px solid #eee;border-radius:13px;background:#fff;padding:20px;min-width:0}.card h3{font-size:18px;color:#1a1a1a;line-height:1.5;margin:4px 0 10px}.card p,.picture-card p{font-size:14px;color:#666;line-height:1.75;margin:0 0 12px}.card:hover{border-color:#f4b0a2}.picture-card{min-width:0;padding:12px;background:#f6f7f9;border-radius:13px}.picture-card h3{font-size:16px;margin:10px 0 4px}.media{background:#f6f7f9;border-radius:12px;overflow:hidden;width:100%;min-width:0;position:relative}.media img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.media-natural img{height:auto;max-height:280px;width:100%;object-fit:contain}.media-feature img{max-height:290px}.media-square{aspect-ratio:1/1}.media-wide{aspect-ratio:16/9}.media-banner{aspect-ratio:16/7}.media-device{max-width:300px;margin:auto}.media-placeholder{background:#f6f7f9;width:100%;min-height:150px;border-radius:12px}.media-square .media-placeholder{height:100%;min-height:0}.media-wide .media-placeholder{height:100%;min-height:0}.feature-split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.feature-split h3{font-size:25px;color:#1a1a1a;margin:0 0 16px}.feature-split p{color:#555}.text-panel{padding:10px 0}.article-head{padding:38px 0 24px;border-bottom:1px solid #eee}.crumb{font-size:13px;color:#888}.article-head h1{font-size:32px;line-height:1.4;color:#1a1a1a;margin:14px 0}.article-head .lead{font-size:17px;max-width:850px;color:#555}.article-grid{display:grid;grid-template-columns:minmax(0,790px) minmax(0,1fr);gap:44px;padding:28px 0 40px}.article-body h2{color:#1a1a1a;font-size:24px;margin:30px 0 10px}.article-body h3{font-size:18px;margin:20px 0 8px}.article-body p{font-size:16px;line-height:1.85;margin:0 0 16px}.article-body .media{margin:15px 0 30px}.sidebar{align-self:start;position:sticky;top:140px;background:#f6f7f9;border-radius:13px;padding:19px}.sidebar h2{font-size:19px;margin:0 0 12px}.sidebar a{display:block;border-bottom:1px solid #e7e7e7;padding:10px 0;font-size:14px}.notice{border-left:3px solid #f45132;padding:16px 20px;background:#fff6f4;margin:26px 0;color:#555}.site-footer{background:#1a1a1a;color:#f5f5f5;padding:44px 0 20px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:34px}.footer-grid p{font-size:14px;color:#ccc}.footer-grid h3{font-size:16px;margin:3px 0 14px}.footer-grid a{display:block;color:#ccc;font-size:14px;margin:8px 0}.footer-grid a:hover{color:#ff684e}.footer-brand{color:#fff}.copyright{border-top:1px solid #444;margin-top:28px;padding-top:20px;font-size:12px;color:#ccc}.mobile-bottom{display:none}.back-top{position:fixed;bottom:28px;right:20px;background:#f45132;border:0;border-radius:50%;width:43px;height:43px;color:white;z-index:100;font-size:22px}@media(max-width:980px){.container{width:calc(100% - 40px)}.topbar{height:59px;justify-content:space-between;gap:12px}.desktop-nav{display:none}.menu-toggle{display:flex}.brand{margin:auto}.brand img{height:29px;max-width:115px}.brand strong{font-size:21px}.join-btn{font-size:13px;min-width:74px;padding:6px 12px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;background:white;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;overflow-y:auto;padding:16px}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-heading{display:flex;justify-content:space-between;align-items:center;padding:6px 0 20px}.drawer-close{border:0;background:#f6f7f9;border-radius:8px;font-size:24px;width:38px;height:38px}.drawer-group{padding-bottom:14px;border-bottom:1px solid #eee}.drawer-group h2{font-size:14px;color:#f45132;margin:14px 0 7px}.drawer-group a{display:block;font-size:14px;padding:6px 3px}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;height:60px;background:white;border-top:1px solid #ddd;display:grid;grid-template-columns:repeat(4,1fr);align-items:center;text-align:center;z-index:900}.mobile-bottom a{font-size:13px;color:#666}.mobile-bottom a:hover{color:#f45132}body{padding-bottom:60px}.back-top{bottom:75px}.article-grid{grid-template-columns:1fr}.sidebar{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:5px}.sidebar h2{grid-column:1/-1}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:767px){.container{width:calc(100% - 32px)}.hero{padding:25px 0;grid-template-columns:1fr;gap:16px}.hero>.media{grid-row:1}.hero h1{font-size:28px}.section{padding:27px 0}.section-head h2{font-size:21px}.grid-4,.grid-3,.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.card{padding:14px}.card h3{font-size:16px}.feature-split{grid-template-columns:1fr;gap:18px}.article-head h1{font-size:26px}.article-head{padding:25px 0 16px}.article-body h2{font-size:21px}.article-body p{font-size:15.5px}.footer-grid{gap:22px}.media-natural img{max-height:240px}}@media(max-width:350px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}.subnav-content{gap:18px}.brand strong{font-size:19px}.join-btn{min-width:72px}.menu-toggle{width:34px}.footer-grid{grid-template-columns:1fr}}@media(min-width:981px){.subnav-content{gap:25px}}