/* CSS Reset & Variables */
        :root {
            --color-brand: #508edf;
            --color-brand-dark: #3a6eb0;
            --color-brand-light: #eef4fb;
            --color-bg-base: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-deep: #0f172a;
            --color-text-main: #1e293b;
            --color-text-muted: #64748b;
            --color-text-inverse: #f8fafc;
            
            --font-flow: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --font-peak: "Segoe UI", system-ui, -apple-system, sans-serif;
            
            --radius-sm: 6px;
            --radius-md: 10px;
            
            --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 10px 30px rgba(80, 142, 223, 0.15);
            
            --transition: all 0.15s ease;
            --bound-max: 1280px;
        }

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

        body {
            font-family: var(--font-flow);
            color: var(--color-text-main);
            background-color: var(--color-bg-base);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        /* Mandatory Typography Rules */
        h1, h2, h3, h4 {
            font-family: var(--font-peak);
            font-weight: 700;
            line-height: 1.3;
            white-space: normal;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        p, span, div, a {
            word-break: break-word;
            overflow-wrap: break-word;
            word-break: keep-all; /* Better for Chinese */
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        /* Mandatory Flex/Grid Rules applied via specific classes */
        .flex-shell {
            display: flex;
            flex-wrap: wrap;
        }
        .flex-shell > * {
            min-width: 0;
        }

        /* --------------------------------------------------------
           Global Components (Vocabulary Compliant)
           -------------------------------------------------------- */
        
        .bound-cloak {
            max-width: var(--bound-max);
            margin: 0 auto;
            padding: 0 5vw;
        }

        .peak-xl {
            font-size: clamp(2.5rem, 5vw, 4.5rem);
            letter-spacing: -0.02em;
            color: var(--color-text-inverse);
            margin-bottom: 1.5rem;
        }

        .peak-lg {
            font-size: clamp(2rem, 4vw, 3rem);
            letter-spacing: -0.01em;
            color: var(--color-text-main);
            margin-bottom: 1.5rem;
        }

        .peak-md {
            font-size: 1.5rem;
            color: var(--color-text-main);
            margin-bottom: 1rem;
        }

        .flow-lead {
            font-size: clamp(1.125rem, 2vw, 1.375rem);
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 2.5rem;
            max-width: 800px;
        }

        .flow-base {
            font-size: 1.0625rem;
            color: var(--color-text-muted);
        }

        /* Pulse (Button) */
        .pulse-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.875rem 2rem;
            background-color: var(--color-brand);
            color: #fff;
            font-weight: 600;
            font-size: 1.125rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .pulse-primary:hover, .pulse-primary:focus {
            background-color: var(--color-brand-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(80, 142, 223, 0.3);
        }

        .pulse-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.875rem 2rem;
            background-color: transparent;
            color: var(--color-brand);
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 2px solid var(--color-brand);
            transition: var(--transition);
        }
        .pulse-ghost:hover, .pulse-ghost:focus {
            background-color: var(--color-brand-light);
            transform: translateY(-2px);
        }

        /* --------------------------------------------------------
           Header & Navigation
           -------------------------------------------------------- */
        .crest-hull {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .crest-tunnel {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 5vw;
            max-width: var(--bound-max);
            margin: 0 auto;
        }

        .crest-tunnel > * {
            min-width: 0;
        }

        /* Strict requirement: Logo container */
        .core {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--color-text-main);
            letter-spacing: -0.02em;
        }

        .core img {
            height: 32px;
            width: auto;
            display: block;
        }

        .route-mesh {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: center;
        }

        .route-mesh > * {
            min-width: 0;
        }

        .route-beam {
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-muted);
            position: relative;
            padding: 0.5rem 0;
        }

        .route-beam:hover, .route-beam:focus {
            color: var(--color-brand);
        }

        .route-beam.active {
            color: var(--color-brand);
        }

        .route-beam.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--color-brand);
            border-radius: 2px;
        }

        @media (max-width: 768px) {
            .route-mesh {
                gap: 1rem;
                margin-top: 1rem;
                width: 100%;
                justify-content: center;
            }
        }

        /* --------------------------------------------------------
           Main Content Blocks
           -------------------------------------------------------- */

        /* 1. Hero (cinematic_strip blueprint) */
        .flare-orbit {
            position: relative;
            width: 100%;
            min-height: 55vh;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end; /* edge_overlay requirement */
            padding-bottom: 6vw;
            padding-top: 6vw;
            overflow: hidden;
        }
        .flare-orbit > * { min-width: 0; }

        /* Cinematic ambient pattern */
        .flare-lens-ambient {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.1;
            background-image: radial-gradient(circle at 80% 20%, var(--color-brand) 0%, transparent 50%);
            pointer-events: none;
        }

        .flare-tunnel {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .flare-cluster {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2.5rem;
        }
        .flare-cluster > * { min-width: 0; }

        /* 2. Capability (Features) - Editorial styling */
        .cloak-capability {
            padding: 8vw 0;
            background-color: var(--color-bg-base);
        }

        .capability-mesh {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 4rem;
            margin-top: 4rem;
        }

        .packet-feature {
            background: var(--color-bg-alt);
            padding: 3rem 2.5rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .packet-feature:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-subtle);
            border-color: rgba(80, 142, 223, 0.2);
        }

        .glyph-hull {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--color-brand-light) 0%, #ffffff 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 2rem;
            color: var(--color-brand);
            box-shadow: 0 4px 10px rgba(0,0,0,0.03);
            border: 1px solid rgba(80, 142, 223, 0.1);
        }

        .glyph-hull svg {
            width: 28px;
            height: 28px;
        }

        /* 3. Proof (Showcase) - Asymmetric layout */
        .proof-hull {
            padding: 8vw 0;
            background-color: var(--color-bg-alt);
            border-top: 1px solid rgba(0,0,0,0.03);
            border-bottom: 1px solid rgba(0,0,0,0.03);
        }

        .proof-tunnel {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6vw;
        }
        .proof-tunnel > * { min-width: 0; }

        .proof-flow {
            flex: 1 1 400px;
        }

        .proof-lens-hull {
            flex: 1.2 1 500px;
            position: relative;
        }

        .proof-lens-hull::before {
            content: '';
            position: absolute;
            inset: -20px;
            background: linear-gradient(135deg, var(--color-brand-light) 0%, transparent 100%);
            border-radius: var(--radius-md);
            z-index: 0;
            transform: rotate(-2deg);
        }

        .proof-lens-lens {
            width: 100%;
            height: auto;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-hover);
            position: relative;
            z-index: 1;
            border: 1px solid rgba(0,0,0,0.05);
            display: block;
        }

        .hop-mesh {
            list-style: none;
            margin-top: 2.5rem;
        }

        .hop-hop {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            margin-bottom: 1.5rem;
            font-size: 1.125rem;
            color: var(--color-text-main);
        }

        .hop-hop svg {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            color: var(--color-brand);
            margin-top: 0.1rem;
        }

        /* 4. Deep Dive / Sub-topic integration */
        .explore-cloak {
            padding: 8vw 0;
            background-color: var(--color-bg-base);
        }

        .explore-mesh {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 4rem;
        }

        .shard-path {
            display: flex;
            flex-direction: column;
            padding: 2.5rem;
            background: var(--color-bg-base);
            border: 1px solid rgba(0,0,0,0.08);
            border-radius: var(--radius-md);
            transition: var(--transition);
            height: 100%;
        }

        .shard-path:hover {
            border-color: var(--color-brand);
            box-shadow: var(--shadow-subtle);
        }

        .shard-peak {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--color-text-main);
        }

        .shard-flow {
            font-size: 1rem;
            color: var(--color-text-muted);
            margin-bottom: 2rem;
            flex-grow: 1;
        }

        .shard-beam {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--color-brand);
            font-weight: 600;
            font-size: 0.95rem;
        }

        .shard-beam svg {
            width: 16px;
            height: 16px;
            transition: transform 0.15s ease;
        }

        .shard-path:hover .shard-beam svg {
            transform: translateX(4px);
        }

        /* --------------------------------------------------------
           Footer
           -------------------------------------------------------- */
        .tail-socket {
            background-color: var(--color-bg-deep);
            color: rgba(255,255,255,0.7);
            padding: 4rem 0 2rem 0;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .tail-tunnel {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-start;
            gap: 3rem;
            margin-bottom: 4rem;
        }
        .tail-tunnel > * { min-width: 0; }

        .tail-brand {
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            display: block;
        }

        .tail-flow {
            max-width: 300px;
            font-size: 0.95rem;
        }

        .tail-mesh {
            display: flex;
            flex-wrap: wrap;
            gap: 4rem;
        }
        .tail-mesh > * { min-width: 0; }

        .tail-cluster {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .tail-peak {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .tail-beam {
            color: rgba(255,255,255,0.6);
            font-size: 0.95rem;
        }

        .tail-beam:hover {
            color: #fff;
        }

        .tail-base-line {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.875rem;
        }

.route-crest-hull{
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

.route-crest-hull .route-crest-tunnel{
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 5vw;
            max-width: 1280px;
            margin: 0 auto;
        }

.route-crest-hull .route-crest-tunnel > *{
            min-width: 0;
        }

.route-crest-hull .route-core{
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-weight: 700;
            font-size: 1.5rem;
            color: #1e293b;
            letter-spacing: -0.02em;
        }

.route-crest-hull .route-core img{
            height: 32px;
            width: auto;
            display: block;
        }

.route-crest-hull .route-route-mesh{
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: center;
        }

.route-crest-hull .route-route-mesh > *{
            min-width: 0;
        }

.route-crest-hull .route-route-beam{
            font-size: 1rem;
            font-weight: 500;
            color: #64748b;
            position: relative;
            padding: 0.5rem 0;
        }

.route-crest-hull .route-route-beam:hover, .route-crest-hull .route-route-beam:focus{
            color: #508edf;
        }

.route-crest-hull .route-route-beam.active{
            color: #508edf;
        }

.route-crest-hull .route-route-beam.active::after{
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #508edf;
            border-radius: 2px;
        }

@media (max-width: 768px){.route-crest-hull .route-route-mesh{
                gap: 1rem;
                margin-top: 1rem;
                width: 100%;
                justify-content: center;
            }}

.route-crest-hull {
    background: rgb(255, 255, 255);
    background-image: none;
}

.socket-tail-socket {
    font-family: var(--font-flow);
    line-height: 1.7;
    color: var(--color-text-main);
}
.socket-tail-socket,
.socket-tail-socket *,
.socket-tail-socket *::before,
.socket-tail-socket *::after {
    box-sizing: border-box;
}

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

.socket-tail-socket p,
.socket-tail-socket h1,
.socket-tail-socket h2,
.socket-tail-socket h3,
.socket-tail-socket h4,
.socket-tail-socket h5,
.socket-tail-socket h6 {
    text-decoration: none;
}

.socket-tail-socket img {
    display: block;
    max-width: 100%;
    height: auto;
    border: 0;
}

.socket-tail-socket {
    box-shadow: none;
    filter: none;
    text-shadow: none;
    background-image: none;
    border-top: none;
    border-left: none;
    border-right: none;
    outline: none;
}

.socket-tail-socket a,
.socket-tail-socket a:hover,
.socket-tail-socket a:focus,
.socket-tail-socket a:active {
    background: transparent;
    box-shadow: none;
    outline: none;
    text-decoration: none;
}

.socket-tail-socket .socket-bound-cloak{
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 5vw;
        }

.socket-tail-socket{
            background-color: #0f172a;
            color: rgba(255,255,255,0.7);
            padding: 4rem 0 2rem 0;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

.socket-tail-socket .socket-tail-tunnel{
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-start;
            gap: 3rem;
            margin-bottom: 4rem;
        }

.socket-tail-socket .socket-tail-tunnel > *{ min-width: 0; }

.socket-tail-socket .socket-tail-brand{
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            display: block;
        }

.socket-tail-socket .socket-tail-flow{
            max-width: 300px;
            font-size: 0.95rem;
        }

.socket-tail-socket .socket-tail-mesh{
            display: flex;
            flex-wrap: wrap;
            gap: 4rem;
        }

.socket-tail-socket .socket-tail-mesh > *{ min-width: 0; }

.socket-tail-socket .socket-tail-cluster{
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

.socket-tail-socket .socket-tail-peak{
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

.socket-tail-socket .socket-tail-beam{
            color: rgba(255,255,255,0.6);
            font-size: 0.95rem;
        }

.socket-tail-socket .socket-tail-beam:hover{
            color: #fff;
        }

.socket-tail-socket .socket-tail-base-line{
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.875rem;
        }