:root{--v4-bg:#ffffff;--v4-bg-secondary:#fbfbfd;--v4-bg-tertiary:#f5f5f7;--v4-surface:#ffffff;--v4-surface-hover:#f5f5f7;--v4-border:#d2d2d7;--v4-border-light:#e8e8ed;--v4-text:#1d1d1f;--v4-text-secondary:#424245;--v4-text-muted:#86868b;--v4-primary:#0071e3;--v4-primary-hover:#0077ed;--v4-primary-light:rgba(0,113,227,0.1);--v4-success:#34c759;--v4-warning:#ff9f0a;--v4-error:#ff3b30;--v4-shadow-sm:0 1px 3px rgba(0,0,0,0.04),0 1px 2px rgba(0,0,0,0.06);--v4-shadow-md:0 4px 12px rgba(0,0,0,0.08);--v4-shadow-lg:0 12px 40px rgba(0,0,0,0.12);--v4-shadow-focus:0 0 0 4px rgba(0,113,227,0.3);--v4-container-max:980px;--v4-container-wide:1200px;--v4-container-padding:22px;--v4-font-display:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--v4-font-text:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.theme-apple{background-color:var(--v4-bg);color:var(--v4-text);min-height:100vh;font-family:var(--v4-font-text);font-size:17px;line-height:1.47059;font-weight:400;letter-spacing:-.022em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.apple-page{position:relative}.apple-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--v4-border-light)}.apple-header-inner{max-width:var(--v4-container-wide);margin:0 auto;padding:0 var(--v4-container-padding);height:48px;display:flex;align-items:center;justify-content:space-between}.apple-logo{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--v4-text);font-weight:600;font-size:21px;letter-spacing:-.02em}.apple-logo img{height:24px;width:auto}.apple-nav{display:flex;align-items:center;gap:2rem}.apple-nav-link{color:var(--v4-text-secondary);text-decoration:none;font-size:14px;font-weight:400;transition:color .2s}.apple-nav-link.active,.apple-nav-link:hover{color:var(--v4-text)}.apple-search-trigger{display:flex;align-items:center;gap:.5rem;padding:8px 16px;background:var(--v4-bg-tertiary);border:none;border-radius:980px;color:var(--v4-text-muted);font-size:14px;cursor:pointer;transition:all .2s}.apple-search-trigger:hover{background:var(--v4-border-light)}.apple-search-trigger kbd{font-size:11px;color:var(--v4-text-muted);font-family:inherit}.apple-main{max-width:var(--v4-container-max);margin:0 auto;padding:40px var(--v4-container-padding) 80px}.apple-main-wide{max-width:var(--v4-container-wide)}.apple-hero{text-align:center;padding:80px 0 60px}.apple-hero-eyebrow{font-size:17px;font-weight:600;color:var(--v4-primary);margin-bottom:12px}.apple-hero-title{font-family:var(--v4-font-display);font-size:clamp(40px,8vw,64px);font-weight:700;line-height:1.05;letter-spacing:-.025em;color:var(--v4-text);margin-bottom:20px}.apple-hero-description{font-size:21px;font-weight:400;line-height:1.381;color:var(--v4-text-secondary);max-width:600px;margin:0 auto 32px}.apple-hero-cta{display:inline-flex;align-items:center;gap:6px;padding:12px 24px;background:var(--v4-primary);border:none;border-radius:980px;color:white;font-size:17px;font-weight:400;cursor:pointer;transition:all .2s}.apple-hero-cta:hover{background:var(--v4-primary-hover)}.apple-hero-cta:focus-visible{outline:none;box-shadow:var(--v4-shadow-focus)}.apple-section{margin-bottom:60px}.apple-section-header{margin-bottom:24px}.apple-section-title{font-family:var(--v4-font-display);font-size:28px;font-weight:600;line-height:1.14286;letter-spacing:.007em;color:var(--v4-text)}.apple-section-subtitle{font-size:17px;color:var(--v4-text-muted);margin-top:4px}.apple-category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}@media (max-width:768px){.apple-category-grid{grid-template-columns:1fr}}.apple-category-card{display:flex;flex-direction:column;padding:24px;background:var(--v4-surface);border:1px solid var(--v4-border-light);border-radius:18px;text-decoration:none;color:inherit;transition:all .3s ease}.apple-category-card:hover{transform:scale(1.02);box-shadow:var(--v4-shadow-lg);border-color:transparent}.apple-category-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--v4-primary-light);border-radius:12px;color:var(--v4-primary);margin-bottom:16px}.apple-category-title{font-size:21px;font-weight:600;color:var(--v4-text);margin-bottom:8px}.apple-category-desc{font-size:14px;color:var(--v4-text-muted);line-height:1.43;margin-bottom:16px;flex-grow:1}.apple-category-link{display:inline-flex;align-items:center;gap:4px;font-size:14px;color:var(--v4-primary);font-weight:400}.apple-category-link svg{transition:transform .2s}.apple-category-card:hover .apple-category-link svg{transform:translateX(3px)}.apple-article-list{display:flex;flex-direction:column}.apple-article-item{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid var(--v4-border-light);text-decoration:none;color:inherit;transition:all .2s}.apple-article-item:first-child{border-top:1px solid var(--v4-border-light)}.apple-article-item:hover{color:var(--v4-primary)}.apple-article-title{font-size:17px;font-weight:400;color:inherit}.apple-article-category{font-size:14px;color:var(--v4-text-muted);margin-top:2px}.apple-pill{display:inline-flex;padding:6px 14px;background:var(--v4-bg-tertiary);border-radius:980px;font-size:14px;color:var(--v4-text-secondary);transition:all .2s}.apple-pill:hover{background:var(--v4-border-light)}.apple-pill.active{background:var(--v4-primary);color:white}.apple-search-input{width:100%;padding:14px 20px 14px 44px;background:var(--v4-bg-tertiary);border:none;border-radius:12px;color:var(--v4-text);font-size:17px;outline:none;transition:all .2s}.apple-search-input::-moz-placeholder{color:var(--v4-text-muted)}.apple-search-input::placeholder{color:var(--v4-text-muted)}.apple-search-input:focus{background:var(--v4-surface);box-shadow:0 0 0 4px rgba(0,113,227,.2),var(--v4-shadow-md)}.apple-article-header{text-align:center;padding:60px 0 40px;border-bottom:1px solid var(--v4-border-light);margin-bottom:40px}.apple-article-header h1{font-family:var(--v4-font-display);font-size:48px;font-weight:700;letter-spacing:-.025em;line-height:1.08;margin-bottom:16px}.apple-article-meta{display:flex;align-items:center;justify-content:center;gap:16px;font-size:14px;color:var(--v4-text-muted)}.apple-article-content{max-width:720px;margin:0 auto;font-size:17px;line-height:1.58824}.apple-article-content h2{font-family:var(--v4-font-display);font-size:28px;font-weight:600;margin:48px 0 16px;letter-spacing:.007em}.apple-article-content h3{font-size:21px;font-weight:600;margin:32px 0 12px}.apple-article-content p{color:var(--v4-text-secondary);margin-bottom:20px}.apple-article-content code{padding:2px 6px;background:var(--v4-bg-tertiary);border-radius:4px;font-family:SF Mono,monospace;font-size:.9em}.apple-article-content pre{background:var(--v4-bg-tertiary);border-radius:12px;padding:20px;overflow-x:auto;margin:24px 0}.apple-article-content ol,.apple-article-content ul{padding-left:24px;margin-bottom:20px;color:var(--v4-text-secondary)}.apple-article-content li{margin-bottom:8px}.apple-article-content blockquote{border-left:3px solid var(--v4-primary);padding-left:20px;margin:24px 0;color:var(--v4-text-secondary);font-style:italic}.apple-sidebar{display:flex;flex-direction:column;gap:24px}.apple-sidebar-card{padding:20px;background:var(--v4-bg-tertiary);border-radius:12px}.apple-sidebar-title{font-size:12px;font-weight:600;color:var(--v4-text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:12px}.apple-feedback{display:flex;align-items:center;gap:12px;padding:24px;background:var(--v4-bg-tertiary);border-radius:12px;margin-top:48px}.apple-feedback-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--v4-surface);border:1px solid var(--v4-border);border-radius:980px;font-size:14px;color:var(--v4-text-secondary);cursor:pointer;transition:all .2s}.apple-feedback-btn:hover{background:var(--v4-surface);border-color:var(--v4-primary);color:var(--v4-primary)}.apple-feedback-btn.active{background:var(--v4-primary);border-color:var(--v4-primary);color:white}.apple-footer{border-top:1px solid var(--v4-border-light);padding:20px 0;text-align:center}.apple-footer-text{font-size:12px;color:var(--v4-text-muted)}.apple-quick-actions{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:40px}.apple-quick-action{display:flex;align-items:center;gap:16px;padding:20px 24px;background:var(--v4-bg-tertiary);border-radius:18px;text-decoration:none;color:inherit;transition:all .2s}.apple-quick-action:hover{background:var(--v4-border-light)}.apple-quick-action-icon{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--v4-primary-light);border-radius:10px;color:var(--v4-primary)}.apple-quick-action-title{font-size:17px;font-weight:600;color:var(--v4-text)}.apple-quick-action-desc{font-size:14px;color:var(--v4-text-muted);margin-top:2px}@media (max-width:768px){.apple-hero{padding:40px 0}.apple-hero-title{font-size:40px}.apple-hero-description{font-size:17px}.apple-nav{display:none}.apple-quick-actions{grid-template-columns:1fr}}