:root {
            --p21sl-primary: #62e286;
            --p21sl-accent: #4caf50;
            --p21sl-dark: #141915;
            --p21sl-light: #ffffff;
            --p21sl-grey: #f4f7f5;
            --p21sl-shadow: 10px 10px 0px rgba(20, 25, 21, 0.05);
            --p21sl-radius: 0px;
            --p21sl-transition: 0.35s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.8;
            color: var(--p21sl-dark);
            background-color: var(--p21sl-light);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* Drift/Orbit: Navigation */
        .p21sl-drift {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            backdrop-filter: blur(10px);
        }

        .p21sl-orbit {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }

        .p21sl-logo {
            display: flex;
            align-items: center;
        }

        .p21sl-logo img {
            height: 32px;
            width: auto;
        }

        .p21sl-orbit-links {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
        }

        .p21sl-orbit-links a {
            text-decoration: none;
            color: var(--p21sl-dark);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--p21sl-transition);
            position: relative;
        }

        .p21sl-orbit-links a:hover,
        .p21sl-orbit-links a.active {
            color: var(--p21sl-primary);
        }

        .p21sl-orbit-links a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--p21sl-primary);
        }

        /* Blaze/Strobe: Hero Section (Fullbleed Overlay) */
        .p21sl-blaze {
            position: relative;
            width: 100%;
            height: 100vh;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .p21sl-blaze-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
        }

        .p21sl-blaze-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .p21sl-blaze-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, rgba(20, 25, 21, 0.4), rgba(20, 25, 21, 0.8));
            z-index: 2;
        }

        .p21sl-strobe {
            position: relative;
            z-index: 3;
            max-width: 900px;
            text-align: center;
            color: var(--p21sl-light);
            padding: 0 20px;
        }

        .p21sl-strobe h1 {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            line-height: 1.1;
            margin-bottom: 1.5rem;
            font-weight: 800;
        }

        .p21sl-strobe p {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            margin-bottom: 2.5rem;
            opacity: 0.9;
        }

        /* Snap/Pulse: Buttons */
        .p21sl-snap {
            display: inline-block;
            padding: 1.2rem 2.5rem;
            background: var(--p21sl-primary);
            color: var(--p21sl-dark);
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--p21sl-transition);
            box-shadow: 4px 4px 0px var(--p21sl-dark);
        }

        .p21sl-snap:hover {
            transform: translate(-2px, -2px);
            box-shadow: 8px 8px 0px var(--p21sl-dark);
            background: var(--p21sl-accent);
        }

        /* Warp/Vessel: Content Sections */
        .p21sl-warp {
            padding: 100px 0;
            display: flex;
            justify-content: center;
        }

        .p21sl-vessel {
            max-width: 1200px;
            width: 100%;
            padding: 0 20px;
        }

        .p21sl-nexus {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
        }

        .p21sl-nexus > div {
            flex: 1;
            min-width: 300px;
        }

        .p21sl-heading-group {
            margin-bottom: 40px;
        }

        .p21sl-heading-group h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            position: relative;
            padding-left: 1rem;
            border-left: 6px solid var(--p21sl-primary);
        }

        /* Replica/Glyph: Cards */
        .p21sl-replica-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }

        .p21sl-replica {
            background: var(--p21sl-light);
            padding: 40px;
            border: 1px solid rgba(0,0,0,0.08);
            box-shadow: var(--p21sl-shadow);
            transition: var(--p21sl-transition);
            height: 100%;
        }

        .p21sl-replica:hover {
            transform: translateY(-5px);
            border-color: var(--p21sl-primary);
        }

        .p21sl-glyph {
            width: 60px;
            height: 60px;
            background: var(--p21sl-grey);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            border-radius: 12px;
        }

        .p21sl-glyph svg {
            width: 30px;
            height: 30px;
            fill: var(--p21sl-primary);
        }

        /* Performance Data Style */
        .p21sl-performance-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
            background: var(--p21sl-grey);
        }

        .p21sl-performance-table th, 
        .p21sl-performance-table td {
            padding: 1.5rem;
            text-align: left;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .p21sl-performance-table th {
            background: var(--p21sl-dark);
            color: var(--p21sl-light);
            font-weight: 600;
        }

        .p21sl-highlight-text {
            color: var(--p21sl-accent);
            font-weight: 800;
        }

        /* Trace/Origin: Footer */
        .p21sl-trace {
            background: var(--p21sl-dark);
            color: var(--p21sl-light);
            padding: 80px 0 40px;
        }

        .p21sl-origin {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .p21sl-origin-info {
            flex: 1;
            min-width: 300px;
        }

        .p21sl-origin-info h3 {
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            color: var(--p21sl-primary);
        }

        .p21sl-origin-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
        }

        .p21sl-origin-group h4 {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .p21sl-origin-group ul {
            list-style: none;
        }

        .p21sl-origin-group ul li {
            margin-bottom: 0.8rem;
        }

        .p21sl-origin-group ul li a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            transition: var(--p21sl-transition);
        }

        .p21sl-origin-group ul li a:hover {
            color: var(--p21sl-primary);
        }

        .p21sl-copyright {
            width: 100%;
            margin-top: 60px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            color: rgba(255,255,255,0.4);
            font-size: 0.9rem;
        }

        /* Media Queries */
        @media (max-width: 768px) {
            .p21sl-orbit {
                padding: 1rem;
            }
            .p21sl-orbit-links {
                display: none; /* Hide desktop nav on mobile */
            }
            .p21sl-blaze {
                height: 80vh;
            }
            .p21sl-warp {
                padding: 60px 0;
            }
            .p21sl-nexus {
                flex-direction: column;
            }
        }

.p21sl-hdr-drift {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    word-break: keep-all;
    color: var(--p21sl-dark);
}
.p21sl-hdr-drift,
.p21sl-hdr-drift *,
.p21sl-hdr-drift *::before,
.p21sl-hdr-drift *::after {
    box-sizing: border-box;
}

.p21sl-hdr-drift nav,
.p21sl-hdr-drift div,
.p21sl-hdr-drift section,
.p21sl-hdr-drift article,
.p21sl-hdr-drift aside,
.p21sl-hdr-drift p,
.p21sl-hdr-drift h1,
.p21sl-hdr-drift h2,
.p21sl-hdr-drift h3,
.p21sl-hdr-drift h4,
.p21sl-hdr-drift h5,
.p21sl-hdr-drift h6,
.p21sl-hdr-drift a {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
    line-height: inherit;
}

.p21sl-hdr-drift p,
.p21sl-hdr-drift h1,
.p21sl-hdr-drift h2,
.p21sl-hdr-drift h3,
.p21sl-hdr-drift h4,
.p21sl-hdr-drift h5,
.p21sl-hdr-drift h6 {
    text-decoration: none;
}

.p21sl-hdr-drift img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 0;
}

.p21sl-hdr-drift {
    box-shadow: none;
    filter: none;
    text-shadow: none;
    background-image: none;
    border-top: none;
    border-left: none;
    border-right: none;
    outline: none;
}

.p21sl-hdr-drift a[href="index.html"],
.p21sl-hdr-drift a[href="download.html"],
.p21sl-hdr-drift a[href="engine.html"],
.p21sl-hdr-drift a[href="sync.html"] {
    --aisite-shell-nav-padding: 0;
    --aisite-shell-nav-margin: 0;
    --aisite-shell-nav-line-height: normal;
    --aisite-shell-nav-display: inline;
    --aisite-shell-nav-height: auto;
    --aisite-shell-nav-min-height: auto;
}

.p21sl-hdr-drift a[href="index.html"],
.p21sl-hdr-drift a[href="index.html"]:hover,
.p21sl-hdr-drift a[href="index.html"]:focus,
.p21sl-hdr-drift a[href="index.html"]:active,
.p21sl-hdr-drift a[href="index.html"].active,
.p21sl-hdr-drift a[href="index.html"][aria-current="page"],
.p21sl-hdr-drift a[href="download.html"],
.p21sl-hdr-drift a[href="download.html"]:hover,
.p21sl-hdr-drift a[href="download.html"]:focus,
.p21sl-hdr-drift a[href="download.html"]:active,
.p21sl-hdr-drift a[href="download.html"].active,
.p21sl-hdr-drift a[href="download.html"][aria-current="page"],
.p21sl-hdr-drift a[href="engine.html"],
.p21sl-hdr-drift a[href="engine.html"]:hover,
.p21sl-hdr-drift a[href="engine.html"]:focus,
.p21sl-hdr-drift a[href="engine.html"]:active,
.p21sl-hdr-drift a[href="engine.html"].active,
.p21sl-hdr-drift a[href="engine.html"][aria-current="page"],
.p21sl-hdr-drift a[href="sync.html"],
.p21sl-hdr-drift a[href="sync.html"]:hover,
.p21sl-hdr-drift a[href="sync.html"]:focus,
.p21sl-hdr-drift a[href="sync.html"]:active,
.p21sl-hdr-drift a[href="sync.html"].active,
.p21sl-hdr-drift a[href="sync.html"][aria-current="page"] {
    background: transparent;
    border: none;
    border-bottom: none;
    box-shadow: none;
    outline: none;
    text-decoration: none;
    padding: var(--aisite-shell-nav-padding, 0);
    margin: var(--aisite-shell-nav-margin, 0);
    line-height: var(--aisite-shell-nav-line-height, normal);
    display: var(--aisite-shell-nav-display, inline);
    height: var(--aisite-shell-nav-height, auto);
    min-height: var(--aisite-shell-nav-min-height, auto);
}

.p21sl-hdr-drift{
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            backdrop-filter: blur(10px);
        }

.p21sl-hdr-drift .p21sl-hdr-orbit{
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }

.p21sl-hdr-drift .p21sl-hdr-logo{
            display: flex;
            align-items: center;
        }

.p21sl-hdr-drift .p21sl-hdr-logo img{
            height: 32px;
            width: auto;
        }

.p21sl-hdr-drift .p21sl-hdr-orbit-links{
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
        }

.p21sl-hdr-drift .p21sl-hdr-orbit-links a{
            text-decoration: none;
            color: #141915;
            font-weight: 600;
            font-size: 1rem;
            transition: 0.35s ease;
            position: relative;
        }

.p21sl-hdr-drift .p21sl-hdr-orbit-links a:hover, .p21sl-hdr-drift .p21sl-hdr-orbit-links a.active{
            color: #62e286;
        }

.p21sl-hdr-drift .p21sl-hdr-orbit-links a.active::after{
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: #62e286;
        }

@media (max-width: 768px){.p21sl-hdr-drift .p21sl-hdr-orbit{
                padding: 1rem;
            }

.p21sl-hdr-drift .p21sl-hdr-orbit-links{
                display: none; 
            }}

.p21sl-hdr-drift {
    background: rgb(255, 255, 255);
    background-image: none;
}

.p21sl-ftr-trace {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    word-break: keep-all;
    color: var(--p21sl-dark);
}
.p21sl-ftr-trace,
.p21sl-ftr-trace *,
.p21sl-ftr-trace *::before,
.p21sl-ftr-trace *::after {
    box-sizing: border-box;
}

.p21sl-ftr-trace nav,
.p21sl-ftr-trace div,
.p21sl-ftr-trace section,
.p21sl-ftr-trace article,
.p21sl-ftr-trace aside,
.p21sl-ftr-trace p,
.p21sl-ftr-trace h1,
.p21sl-ftr-trace h2,
.p21sl-ftr-trace h3,
.p21sl-ftr-trace h4,
.p21sl-ftr-trace h5,
.p21sl-ftr-trace h6,
.p21sl-ftr-trace a {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
    line-height: inherit;
}

.p21sl-ftr-trace p,
.p21sl-ftr-trace h1,
.p21sl-ftr-trace h2,
.p21sl-ftr-trace h3,
.p21sl-ftr-trace h4,
.p21sl-ftr-trace h5,
.p21sl-ftr-trace h6 {
    text-decoration: none;
}

.p21sl-ftr-trace img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 0;
}

.p21sl-ftr-trace {
    box-shadow: none;
    filter: none;
    text-shadow: none;
    background-image: none;
    border-top: none;
    border-left: none;
    border-right: none;
    outline: none;
}

.p21sl-ftr-trace a,
.p21sl-ftr-trace a:hover,
.p21sl-ftr-trace a:focus,
.p21sl-ftr-trace a:active {
    background: transparent;
    box-shadow: none;
    outline: none;
    text-decoration: none;
}

.p21sl-ftr-trace{
            background: #141915;
            color: #ffffff;
            padding: 80px 0 40px;
        }

.p21sl-ftr-trace .p21sl-ftr-origin{
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-info{
            flex: 1;
            min-width: 300px;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-info h3{
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            color: #62e286;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-links{
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-group h4{
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-group ul{
            list-style: none;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-group ul li{
            margin-bottom: 0.8rem;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-group ul li a{
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            transition: 0.35s ease;
        }

.p21sl-ftr-trace .p21sl-ftr-origin-group ul li a:hover{
            color: #62e286;
        }

.p21sl-ftr-trace .p21sl-ftr-copyright{
            width: 100%;
            margin-top: 60px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            color: rgba(255,255,255,0.4);
            font-size: 0.9rem;
        }