:root{--bf-orange:#f17832;--bf-orange-deep:#d95720;--bf-sun:#ffc857;--bf-cream:#fff9ef;--bf-paper:#fffdf8;--bf-coffee:#5d3a2e;--bf-muted:#936f61;--bf-line:#ead8c9;--bf-green:#5f8b63;--bf-shadow:0 14px 30px rgba(147,91,56,.12);--bf-radius:18px;--bf-shell:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bf-cream);color:var(--bf-coffee);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.38;z-index:-1;background-image:radial-gradient(rgba(199,131,75,.15) .7px,transparent .7px);background-size:13px 13px}a{color:inherit;text-decoration:none}button,input{font:inherit}.bf-shell{width:min(var(--bf-shell),calc(100% - 56px));margin:0 auto}.bf-sun-orb{position:absolute;right:4vw;top:110px;width:180px;height:180px;border-radius:50%;background:rgba(255,200,87,.15);filter:blur(1px);pointer-events:none}.bf-header{position:relative;background:rgba(255,249,239,.9);border-bottom:1px solid rgba(234,216,201,.9);z-index:5}.bf-header-inner{height:88px;display:flex;align-items:center;gap:30px}.bf-brand{display:flex;align-items:center;gap:11px;min-width:230px}.bf-brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px 18px 12px 17px;background:var(--bf-orange);color:#fff;font-size:22px;box-shadow:5px 5px 0 var(--bf-sun);transform:rotate(-5deg)}.bf-brand-copy{display:flex;flex-direction:column;line-height:1.2}.bf-brand-copy strong{font-size:18px;letter-spacing:.03em}.bf-brand-copy small{font-size:11px;color:var(--bf-muted);margin-top:4px}.bf-search{height:44px;max-width:455px;flex:1;display:flex;align-items:center;gap:8px;padding:0 7px 0 14px;border:1px solid var(--bf-line);background:#fff;border-radius:11px;box-shadow:0 3px 0 rgba(234,216,201,.48)}.bf-search:focus-within{border-color:var(--bf-orange);box-shadow:0 3px 0 var(--bf-sun)}.bf-search-icon{font-size:25px;color:var(--bf-orange);line-height:1}.bf-search input{border:0;outline:0;background:none;min-width:0;flex:1;color:var(--bf-coffee)}.bf-search input::placeholder{color:#b69a8d}.bf-search button{height:32px;border:0;border-radius:8px;padding:0 15px;background:#fff3df;color:var(--bf-orange-deep);font-weight:700;cursor:pointer;transition:.2s}.bf-search button:hover{background:var(--bf-orange);color:#fff}.bf-header-cta{font-weight:700;font-size:14px;white-space:nowrap}.bf-header-cta span{display:inline-block;padding:2px 7px;border-radius:5px;background:var(--bf-sun);color:#684323;font-size:10px;margin-right:4px;vertical-align:2px}.bf-header-cta b{color:var(--bf-orange);font-size:20px;margin-left:6px}.bf-nav-row{display:flex;align-items:center;gap:15px;height:50px;overflow:hidden}.bf-nav{display:flex;gap:5px;align-items:center;overflow:auto;scrollbar-width:none}.bf-nav::-webkit-scrollbar{display:none}.bf-nav-item{position:relative;flex:none;padding:6px 15px;color:var(--bf-muted);font-weight:600;font-size:13px;border-radius:8px;transition:.2s}.bf-nav-item:hover,.bf-nav-item.is-active{color:var(--bf-orange-deep);background:#fff0d7}.bf-nav-item.is-active:after{content:"";position:absolute;height:3px;width:18px;bottom:-7px;left:50%;transform:translateX(-50%) rotate(-3deg);background:var(--bf-orange);border-radius:8px}.bf-nav-arrow{color:var(--bf-orange);font-size:28px;line-height:1;animation:arrowNudge 1.8s ease-in-out infinite}.bf-nav-tip{color:#b1907f;font-size:12px;white-space:nowrap}.bf-main{padding-top:36px}.bf-hero{min-height:420px;display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;padding:58px 62px 54px;background:#fff5e2;border:1px solid #f4dfbd;border-radius:26px;box-shadow:var(--bf-shadow);overflow:hidden;position:relative}.bf-hero:after{content:"";position:absolute;right:-65px;bottom:-95px;width:310px;height:220px;border:2px dashed rgba(241,120,50,.24);border-radius:50%;transform:rotate(-13deg)}.bf-kicker{display:inline-flex;align-items:center;gap:8px;font-size:11px;letter-spacing:.13em;color:var(--bf-orange-deep);font-weight:800}.bf-kicker i{width:8px;height:8px;border-radius:50%;background:var(--bf-orange);box-shadow:0 0 0 5px rgba(241,120,50,.13);display:inline-block}.bf-hero h1,.bf-page-intro h1,.bf-not-found h1{font-size:clamp(38px,5vw,64px);letter-spacing:-.06em;line-height:1.14;margin:17px 0 18px;font-weight:900}.bf-hero h1 em,.bf-page-intro h1 em,.bf-not-found h1 em,.bf-study-copy h2 em,.bf-download-panel h2 em{font-style:normal;color:var(--bf-orange);position:relative;white-space:nowrap}.bf-hero h1 em:after,.bf-page-intro h1 em:after,.bf-not-found h1 em:after{content:"";position:absolute;left:0;right:-5px;bottom:-4px;height:9px;background:rgba(255,200,87,.65);z-index:-1;transform:rotate(-1.5deg);border-radius:8px}.bf-hero-lead{max-width:490px;color:var(--bf-muted);font-size:16px;margin:0 0 27px}.bf-hero-actions{display:flex;align-items:center;gap:24px}.bf-btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:12px 18px;border-radius:10px;font-weight:800;border:0;cursor:pointer;transition:transform .2s,box-shadow .2s}.bf-btn-primary{position:relative;overflow:hidden;background:var(--bf-orange);color:#fff;box-shadow:5px 5px 0 #e6aa43}.bf-btn-primary:before{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(100deg,transparent 20%,rgba(255,247,204,.7) 50%,transparent 80%);transition:transform .55s}.bf-btn-primary:hover:before{transform:translateX(100%)}.bf-btn-primary:hover{transform:translateY(-3px);box-shadow:5px 8px 0 #e6aa43}.bf-btn span{font-size:21px;line-height:0}.bf-text-link{font-weight:700;color:var(--bf-muted);border-bottom:1px dashed var(--bf-orange);padding-bottom:2px}.bf-text-link span{color:var(--bf-orange);font-size:21px;margin-left:5px}.bf-hero-proof{display:flex;gap:22px;color:#b18c79;font-size:11px;margin-top:35px}.bf-hero-proof b{font-size:13px;color:var(--bf-orange);margin-right:4px}.bf-hero-board{height:304px;position:relative;max-width:430px;margin:auto;width:100%}.bf-board-pin{position:absolute;left:48%;top:12px;width:14px;height:14px;background:var(--bf-orange-deep);border-radius:50%;box-shadow:2px 2px 0 #b94b1e;z-index:3}.bf-board-pin:after{content:"";position:absolute;width:5px;height:5px;left:4px;top:3px;border-radius:50%;background:#ffcdb1}.bf-paper{position:absolute;padding:19px 22px;color:#69432d;box-shadow:8px 12px 16px rgba(143,83,46,.17);display:flex;flex-direction:column}.bf-paper:after{content:"";position:absolute;right:0;bottom:0;border-style:solid;border-width:0 0 25px 25px;border-color:transparent transparent rgba(255,255,255,.6) transparent;transition:.4s}.bf-paper:hover:after{border-width:0 0 37px 37px}.bf-paper-yellow{width:205px;height:212px;left:4%;top:43px;background:#ffd974;transform:rotate(-7deg)}.bf-paper-orange{width:190px;height:205px;right:5%;top:67px;background:#ffb45d;transform:rotate(7deg);padding:20px 20px}.bf-paper-label{font-size:10px;letter-spacing:.14em;font-weight:800;opacity:.68;margin-bottom:17px}.bf-paper strong{font-size:22px;line-height:1.25;letter-spacing:-.04em}.bf-paper small{font-size:12px;line-height:1.55;margin-top:auto;opacity:.75}.bf-doodle-arrow{font-family:cursive;font-size:35px;position:absolute;right:22px;bottom:17px;transform:rotate(16deg);color:var(--bf-orange-deep)}.bf-board-scribble{position:absolute;bottom:3px;left:40%;font-family:cursive;font-size:14px;line-height:1.2;transform:rotate(-5deg);color:var(--bf-orange-deep)}.bf-board-scribble span{color:var(--bf-coffee);font-size:12px}.bf-section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:20px}.bf-section-index{display:block;color:var(--bf-orange-deep);font-size:10px;letter-spacing:.14em;font-weight:900}.bf-section-head h2{font-size:27px;letter-spacing:-.04em;margin:5px 0 0}.bf-underlink{font-size:13px;font-weight:700;color:var(--bf-muted)}.bf-underlink span{color:var(--bf-orange);font-size:18px}.bf-hot-zone{padding:74px 7px 68px}.bf-hot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.bf-hot-card{position:relative;padding:21px 23px 18px;background:#fff;border:1px solid var(--bf-line);border-radius:13px;box-shadow:0 5px 0 #f1decb;transition:.25s;overflow:hidden}.bf-hot-card:before{content:"";position:absolute;top:0;left:0;width:50px;height:4px;background:var(--bf-orange)}.bf-hot-card:hover{transform:translateY(-5px) rotate(-.6deg);box-shadow:0 10px 0 #edcfae}.bf-hot-number{font-family:Georgia,serif;color:#e6c0a9;font-size:22px;position:absolute;right:19px;top:12px}.bf-hot-title{font-weight:800;line-height:1.5;max-width:85%;min-height:48px}.bf-hot-meta{display:flex;gap:13px;margin-top:13px;color:#ae8c7a;font-size:11px}.bf-hot-meta span:first-child{color:var(--bf-orange-deep);font-weight:700}.bf-hot-arrow{position:absolute;right:19px;bottom:17px;color:var(--bf-orange);font-size:19px}.bf-empty-hot{grid-column:1/-1;color:var(--bf-muted);padding:24px;background:#fff;border-radius:12px}.bf-resource-section{padding:8px 7px 76px}.bf-resource-head{align-items:center}.bf-filter-note{font-size:12px;color:var(--bf-muted);display:flex;gap:8px;align-items:center}.bf-highlight{display:inline-block;padding:2px 7px;background:linear-gradient(transparent 25%,#ffd974 25%,#ffd974 82%,transparent 82%);font-weight:800;color:var(--bf-coffee)}.bf-mini-arrow{font-size:24px;color:var(--bf-orange);transform:rotate(16deg)}.bf-resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}.bf-resource-card{position:relative;isolation:isolate;min-height:300px;padding:20px 20px 17px;background:var(--bf-paper);border:1px solid var(--bf-line);border-radius:16px;box-shadow:var(--bf-shadow);transition:transform .28s,box-shadow .28s;overflow:hidden}.bf-resource-card:hover{transform:translateY(-7px) rotate(-.45deg);box-shadow:0 20px 35px rgba(147,91,56,.16)}.bf-card-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:2}.bf-subject-tag{display:inline-block;border-radius:6px;padding:3px 8px;background:#fff0d5;color:var(--bf-orange-deep);font-size:11px;font-weight:800}.bf-year{font-size:11px;color:#b79b8e}.bf-note-fold{position:absolute;right:-1px;top:-1px;width:52px;height:52px;background:linear-gradient(135deg,#fffaf0 0 50%,#f1dfc7 51% 100%);clip-path:polygon(0 0,100% 0,100% 100%);transform-origin:100% 0;transition:transform .45s cubic-bezier(.2,.8,.2,1);z-index:3;box-shadow:-2px 2px 3px rgba(107,70,42,.1)}.bf-note-fold:after{content:"";position:absolute;right:4px;top:8px;width:19px;height:2px;background:#ddbda6;transform:rotate(45deg)}.bf-resource-card:hover .bf-note-fold{transform:rotate(19deg) translate(4px,-2px)}.bf-resource-icon{width:42px;height:42px;display:grid;place-items:center;margin-top:24px;border-radius:12px 13px 8px 12px;background:#fff0d8;color:var(--bf-orange);font-size:21px;transform:rotate(-4deg)}.bf-resource-card:nth-child(3n+2) .bf-resource-icon{background:#fff4b9;color:#a86f1d;transform:rotate(4deg)}.bf-resource-card:nth-child(3n) .bf-resource-icon{background:#e9f0d9;color:var(--bf-green);transform:rotate(-3deg)}.bf-resource-card h3{font-size:18px;line-height:1.4;letter-spacing:-.03em;margin:13px 0 6px;max-width:90%}.bf-resource-card h3 a:hover{color:var(--bf-orange-deep)}.bf-resource-card p{font-size:12px;color:var(--bf-muted);line-height:1.7;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:41px}.bf-card-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:13px;border-top:1px dashed var(--bf-line)}.bf-format{color:#9b7b6d;font-size:11px}.bf-format i{display:inline-block;width:6px;height:6px;background:var(--bf-orange);border-radius:2px;margin-right:3px}.bf-preview{font-size:12px;color:var(--bf-orange-deep);font-weight:800}.bf-preview span{font-size:18px;margin-left:2px}.bf-download{position:absolute;right:18px;bottom:15px;display:flex;align-items:center;gap:6px;color:var(--bf-orange);font-weight:800;font-size:12px;padding:5px 0}.bf-download:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--bf-orange);transform-origin:left;transform:scaleX(.25);transition:.35s}.bf-download:hover:after{transform:scaleX(1)}.bf-download b{display:grid;place-items:center;width:24px;height:24px;border-radius:7px;background:#fff0d5;font-size:16px;transition:.3s}.bf-download:hover b{background:var(--bf-orange);color:#fff;transform:translateY(3px)}.bf-empty-state{grid-column:1/-1;text-align:center;padding:68px 20px;background:#fff;border:1px dashed var(--bf-line);border-radius:16px}.bf-empty-icon{font-size:36px;color:var(--bf-orange)}.bf-empty-state h3{margin:8px 0 0}.bf-empty-state p{margin:4px;color:var(--bf-muted)}.bf-pagination{margin-top:32px}.bf-pagination ul{list-style:none;display:flex;justify-content:center;gap:7px;padding:0;margin:0}.bf-pagination li a,.bf-pagination li span{display:grid;place-items:center;min-width:34px;height:34px;border:1px solid var(--bf-line);border-radius:8px;background:#fff;color:var(--bf-muted);font-size:12px}.bf-pagination li .current,.bf-pagination li a:hover{background:var(--bf-orange);border-color:var(--bf-orange);color:#fff}.bf-study-strip{position:relative;display:grid;grid-template-columns:1fr 270px 100px;gap:48px;align-items:center;padding:55px 60px;background:#f6e5ba;border-radius:22px;overflow:hidden;margin:0 7px 82px}.bf-study-strip:before{content:"";position:absolute;inset:12px;border:1px dashed rgba(166,104,54,.27);border-radius:16px;pointer-events:none}.bf-study-copy{position:relative}.bf-study-copy h2{font-size:31px;line-height:1.22;margin:11px 0 12px;letter-spacing:-.05em}.bf-study-copy p{color:#8b6853;max-width:450px;font-size:13px;margin:0}.bf-study-checklist{position:relative;padding:21px 22px;background:#fff8e6;box-shadow:5px 7px 0 #dca95d;transform:rotate(2deg)}.bf-check-title{font-weight:900;margin-bottom:12px}.bf-check-title span{float:right;color:var(--bf-orange);font-size:19px}.bf-study-checklist label{display:block;font-size:12px;color:#8d6d5d;padding:5px 0;cursor:pointer}.bf-study-checklist input{appearance:none;width:13px;height:13px;vertical-align:-2px;margin:0 7px 0 0;border:1.5px solid #cfa889;border-radius:3px;background:#fff;cursor:pointer}.bf-study-checklist input:checked{background:var(--bf-orange);border-color:var(--bf-orange);box-shadow:inset 0 0 0 2px #fff}.bf-progress{height:5px;background:#f2d9bc;border-radius:9px;margin:13px 0 8px;overflow:hidden}.bf-progress i{display:block;height:100%;width:0;background:var(--bf-orange);transition:width .35s}.bf-study-checklist small{font-size:10px;color:#ae8b77}.bf-study-doodle{font-family:cursive;color:var(--bf-orange-deep);font-size:47px;line-height:.7;position:relative;transform:rotate(-10deg)}.bf-study-doodle span{font-size:13px;line-height:1;display:block;margin-top:10px}.bf-footer{background:#5c3b31;color:#f7e6d3;padding:40px 0 45px}.bf-footer-inner{display:grid;grid-template-columns:1fr 1fr 1.4fr;align-items:start;gap:35px}.bf-footer-brand{display:flex;gap:13px;align-items:center}.bf-footer-brand .bf-brand-mark{width:35px;height:35px;font-size:17px;box-shadow:4px 4px 0 #d18c43}.bf-footer-brand strong{font-size:17px}.bf-footer-brand p{font-size:11px;color:#c9a89a;margin:4px 0 0}.bf-footer-links{display:flex;flex-wrap:wrap;gap:17px;font-size:12px}.bf-footer-links a{color:#efd1a9}.bf-footer-links a:hover{color:#fff}.bf-footer-copy{font-size:11px;line-height:1.7;color:#bd988b}.bf-modal{display:none;position:fixed;inset:0;z-index:20;align-items:center;justify-content:center;padding:22px}.bf-modal.is-open{display:flex}.bf-modal-backdrop{position:absolute;inset:0;background:rgba(67,37,25,.48);backdrop-filter:blur(3px)}.bf-modal-card{position:relative;width:min(450px,100%);padding:38px 35px 34px;border-radius:20px;background:#fff8e9;box-shadow:0 20px 50px rgba(50,25,15,.2);animation:modalIn .25s ease-out}.bf-modal-card h2{font-size:25px;line-height:1.35;margin:15px 0 8px}.bf-modal-card p{color:var(--bf-muted);margin:0 0 22px}.bf-modal-close{position:absolute;right:14px;top:10px;border:0;background:none;color:var(--bf-muted);font-size:27px;cursor:pointer}.bf-page-intro{padding:65px 7px 47px}.bf-page-intro h1{font-size:48px;margin:12px 0}.bf-page-intro p{color:var(--bf-muted);max-width:390px}.bf-search-results{padding-left:7px;padding-right:7px}.bf-breadcrumb{display:flex;gap:9px;align-items:center;color:#ae8b7a;font-size:12px;padding:15px 7px 30px}.bf-breadcrumb a:hover{color:var(--bf-orange)}.bf-breadcrumb b{font-weight:600;color:var(--bf-coffee)}.bf-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:42px;align-items:start;padding:16px 7px 80px}.bf-article-main{min-width:0;padding:33px 38px;background:#fffdf8;border:1px solid var(--bf-line);border-radius:18px;box-shadow:var(--bf-shadow)}.bf-article-label{display:flex;gap:12px;align-items:center;color:#aa8a7c;font-size:11px}.bf-article-main h1{font-size:clamp(30px,4vw,47px);line-height:1.25;letter-spacing:-.05em;margin:16px 0 13px}.bf-article-meta{display:flex;align-items:center;gap:9px;color:#ad8e80;font-size:11px;padding-bottom:22px;border-bottom:1px dashed var(--bf-line)}.bf-article-mark{margin-left:auto;padding:3px 8px;background:#fff0c4;color:#9b6b27;border-radius:5px}.bf-article-content{font-size:16px;line-height:2;color:#594338;padding:27px 0}.bf-article-content h2,.bf-article-content h3{color:var(--bf-coffee);line-height:1.35;margin-top:27px}.bf-article-content img{max-width:100%;height:auto;border-radius:10px}.bf-article-content blockquote{margin:20px 0;padding:13px 18px;border-left:4px solid var(--bf-orange);background:#fff4de;color:#876857}.bf-article-content a{color:var(--bf-orange-deep);text-decoration:underline;text-decoration-color:#f5c35b}.bf-article-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:18px 0;border-top:1px dashed var(--bf-line);font-size:12px}.bf-article-tags span{color:#ac8c7a}.bf-article-tags a{padding:3px 8px;border-radius:5px;background:#fff2d7;color:var(--bf-orange-deep)}.bf-article-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;border-top:1px dashed var(--bf-line);padding-top:18px}.bf-article-nav a{display:flex;flex-direction:column;gap:4px;padding:12px;border-radius:9px;background:#fff6e8}.bf-article-nav a:last-child{text-align:right}.bf-article-nav small{color:#b28b78;font-size:10px}.bf-article-nav strong{font-size:12px;line-height:1.45}.bf-article-aside{position:sticky;top:20px}.bf-download-panel{padding:28px 24px;border-radius:16px;background:#ffd36d;box-shadow:7px 8px 0 #dc9850;transform:rotate(1.3deg)}.bf-download-panel h2{font-size:27px;line-height:1.22;letter-spacing:-.05em;margin:11px 0}.bf-download-panel p{font-size:12px;color:#8a5e3b;line-height:1.7}.bf-btn-wide{width:100%;margin:8px 0 14px}.bf-quark-note{font-size:11px;color:#8b694e}.bf-quark-note i{display:inline-block;width:7px;height:7px;background:#6d936e;border-radius:50%;margin-right:5px}.bf-side-note{position:relative;margin-top:31px;padding:20px;background:#fff0a8;box-shadow:4px 5px 0 #ddbb6b;transform:rotate(-3deg)}.bf-side-note span{font-size:11px;color:#a96f27;font-weight:900}.bf-side-note p{font-size:12px;line-height:1.65;margin:7px 0;color:#795642}.bf-side-note b{position:absolute;right:18px;bottom:13px;color:var(--bf-orange);font-size:27px}.bf-not-found{min-height:570px;padding:120px 7px;text-align:center}.bf-not-found h1{font-size:53px;margin:15px 0}.bf-not-found p{color:var(--bf-muted);margin-bottom:25px}.bf-404-doodle{font-family:cursive;color:var(--bf-orange);font-size:62px;line-height:.7;transform:rotate(-9deg);margin:55px auto}.bf-404-doodle span{font-size:14px}.msg{list-style:none;padding:0}.post{margin-top:30px}.posttop{font-weight:800}.post input.text,.post textarea{max-width:100%;border:1px solid var(--bf-line);border-radius:8px;padding:8px;background:#fff}.post textarea{width:100%;min-height:100px}.post .button{background:var(--bf-orange);border:0;color:#fff;border-radius:8px;padding:8px 15px}.commentpagebar{list-style:none;padding:0;display:flex;gap:5px}
@keyframes arrowNudge{0%,100%{transform:translateX(0)}50%{transform:translateX(6px) rotate(-5deg)}}@keyframes modalIn{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
@media(max-width:900px){.bf-header-inner{gap:15px}.bf-brand{min-width:auto}.bf-brand-copy small,.bf-header-cta{display:none}.bf-hero{grid-template-columns:1fr;padding:42px 38px}.bf-hero-board{margin-top:4px}.bf-resource-grid{grid-template-columns:repeat(2,1fr)}.bf-study-strip{grid-template-columns:1fr 235px;gap:28px;padding:45px 38px}.bf-study-doodle{display:none}.bf-article-layout{grid-template-columns:1fr}.bf-article-aside{position:static}.bf-download-panel{max-width:380px}.bf-footer-inner{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.bf-shell{width:calc(100% - 30px)}.bf-header-inner{height:auto;min-height:75px;flex-wrap:wrap;padding:13px 0}.bf-brand{flex:1}.bf-search{order:3;flex-basis:100%;max-width:none}.bf-nav-row{height:46px;width:calc(100% - 30px)}.bf-nav-tip{display:none}.bf-hero{padding:32px 22px 25px;min-height:auto;border-radius:19px}.bf-hero h1{font-size:38px}.bf-hero-lead{font-size:14px}.bf-hero-proof{gap:12px;flex-wrap:wrap;margin-top:27px}.bf-hero-board{height:245px;transform:scale(.83);transform-origin:top center;margin-bottom:-37px}.bf-paper-yellow{left:0}.bf-paper-orange{right:0}.bf-hot-zone{padding:52px 0 46px}.bf-hot-grid{grid-template-columns:1fr}.bf-section-head h2{font-size:24px}.bf-resource-section{padding-bottom:53px}.bf-resource-grid{grid-template-columns:1fr;gap:14px}.bf-resource-card{min-height:278px}.bf-study-strip{grid-template-columns:1fr;padding:38px 25px;margin:0 0 56px}.bf-study-checklist{max-width:280px;margin:10px auto 0;width:100%}.bf-footer{padding:32px 0}.bf-footer-inner{grid-template-columns:1fr;gap:20px}.bf-footer-copy{max-width:450px}.bf-page-intro{padding:43px 0 30px}.bf-page-intro h1{font-size:39px}.bf-article-layout{padding-left:0;padding-right:0}.bf-article-main{padding:23px 19px}.bf-article-meta{flex-wrap:wrap}.bf-article-mark{margin-left:0}.bf-article-nav{grid-template-columns:1fr}.bf-article-nav a:last-child{text-align:left}.bf-not-found{padding:90px 0}.bf-not-found h1{font-size:42px}}
.bf-hot-grid .bf-hot-card:nth-child(n+4){display:none}
.bf-module{padding:19px;background:#fffdf8;border:1px solid var(--bf-line);border-radius:14px;margin-bottom:14px;box-shadow:0 7px 18px rgba(147,91,56,.08)}.bf-module h3{font-size:15px;margin:0 0 12px;padding-bottom:9px;border-bottom:1px dashed var(--bf-line)}.bf-module h3:before{content:"✦";color:var(--bf-orange);margin-right:6px}.bf-module-body{font-size:12px;color:var(--bf-muted)}.bf-module-list{list-style:none;padding:0;margin:0}.bf-module-list li{padding:6px 0;border-bottom:1px dashed #f0dfd1;font-size:12px}.bf-module-list li:last-child{border:0}.bf-module-list a:hover{color:var(--bf-orange)}
.bf-sidebar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:34px}.bf-article-modules{max-width:760px;padding:0 7px 70px}.bf-article-modules .bf-module{display:inline-block;vertical-align:top;width:calc(50% - 10px);margin-right:12px}.bf-article-modules .bf-module:nth-child(2n){margin-right:0}@media(max-width:620px){.bf-sidebar-grid{grid-template-columns:1fr}.bf-article-modules .bf-module{display:block;width:100%;margin-right:0}}.bf-header-scrolled{box-shadow:0 5px 18px rgba(108,66,42,.08)}body.bf-modal-open{overflow:hidden}
.bf-highlight{animation:highlightPop 2.8s ease-in-out infinite}.bf-download.is-loading:after{animation:downloadFill .7s ease forwards}.bf-download.is-loading b{animation:downloadPulse .7s ease}.bf-download.is-loading span{color:var(--bf-orange-deep)}@keyframes highlightPop{0%,68%,100%{transform:scale(1) rotate(0)}72%{transform:scale(1.08) rotate(-1deg)}77%{transform:scale(.98) rotate(1deg)}82%{transform:scale(1.04) rotate(0)}}@keyframes downloadFill{0%{transform:scaleX(.25)}100%{transform:scaleX(1)}}@keyframes downloadPulse{50%{transform:translateY(4px) scale(1.08);background:var(--bf-orange);color:#fff}}
.bf-content-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px;align-items:start}.bf-primary-column{min-width:0}.bf-sidebar-column{position:sticky;top:20px;padding-top:74px}.bf-sidebar-column .bf-module{margin-bottom:14px}.bf-article-sidebar-modules{margin-top:28px}.bf-article-sidebar-modules .bf-module{margin-bottom:14px}@media(max-width:900px){.bf-content-layout{grid-template-columns:1fr}.bf-sidebar-column{position:static;padding-top:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.bf-sidebar-column .bf-module{margin-bottom:0}}@media(max-width:620px){.bf-sidebar-column{grid-template-columns:1fr}}
.bf-resource-card h3{height:50.4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bf-card-bottom{justify-content:flex-start;padding-right:92px}
.bf-card-bottom .bf-preview{margin-left:auto;white-space:nowrap}
.bf-card-bottom .bf-preview{position:absolute;right:18px;bottom:43px;margin:0}
.bf-card-bottom{padding-right:0;padding-bottom:34px}
.bf-card-bottom .bf-preview{position:static;margin-left:auto}