:root{--bg-color: #f7f9fc;--header-bg: #ffffff;--text-primary: #1a1f36;--text-secondary: #697386;--border-color: #e3e8ee;--accent-color: #635bff;--accent-hover: #4b45c6;--danger-color: #e5484d;--success-color: #22c55e}.account-layout{min-height:100vh;background-color:var(--bg-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;color:var(--text-primary)}.account-header{height:60px;background-color:var(--header-bg);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:100}.header-left,.header-right{display:flex;align-items:center;gap:24px}.account-logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;color:var(--text-primary)}.header-nav{display:flex;gap:4px;margin-left:12px}.nav-item{background:none;border:none;padding:6px 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#0000004d;transform:perspective(1000px) rotateY(-5deg) rotateX(2deg);width:100%;max-width:400px}.code-editor{background:#1a1f36;border-radius:8px;padding:16px;font-family:SF Mono,Monaco,Inconsolata,Fira Mono,Droid Sans Mono,Source Code Pro,monospace;font-size:13px;color:#aab7c4;line-height:1.5}.code-line{display:flex;gap:16px}.line-num{color:#4f566b;-webkit-user-select:none;user-select:none;width:16px;text-align:right}.phone-float{position:absolute;bottom:-20px;right:-20px;width:200px;height:300px;background:#1a1f36;border-radius:24px;border:8px solid #0a2540;box-shadow:0 20px 40px #0000004d;transform:rotate(5deg);overflow:hidden}.phone-screen{background:#fff;height:100%;display:flex;flex-direction:column}.features-section{padding:100px 0;background-color:#fff}.section-title{text-align:center;margin-bottom:64px}.subtitle{color:var(--accent-color);font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.5px;display:block;margin-bottom:16px}.section-title 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