:root {
        --color-primary: #65bae5;
        --color-primary-dark: #4a9bc5;
        --color-primary-light: #e0f2fb;
        --color-text-main: #1e293b;
        --color-text-muted: #64748b;
        --color-bg-page: #f8fafc;
        --color-bg-surface: #ffffff;
        --radius-base: 12px;
        --radius-large: 24px;
        --shadow-soft: 0 10px 25px -5px rgba(101, 186, 229, 0.15), 0 8px 10px -6px rgba(101, 186, 229, 0.1);
        --shadow-hover: 0 20px 40px -10px rgba(101, 186, 229, 0.25), 0 12px 16px -8px rgba(101, 186, 229, 0.15);
        --transition: all 0.25s ease;
    }

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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        color: var(--color-text-main);
        background-color: var(--color-bg-page);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
        word-break: break-word;
        overflow-wrap: break-word;
    }

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

    /* Typography */
    .lead-h1 {
        font-size: clamp(2.5rem, 5vw, 4rem);
        font-weight: 800;
        line-height: 1.15;
        letter-spacing: -0.02em;
        color: #0f172a;
        white-space: normal;
        margin-bottom: 1.5rem;
    }

    .lead-h2 {
        font-size: clamp(2rem, 3vw, 2.5rem);
        font-weight: 700;
        line-height: 1.2;
        letter-spacing: -0.01em;
        color: #0f172a;
        white-space: normal;
        margin-bottom: 1rem;
    }

    .lead-h3 {
        font-size: 1.25rem;
        font-weight: 600;
        line-height: 1.4;
        color: #0f172a;
        white-space: normal;
        margin-bottom: 0.75rem;
    }

    .code-large {
        font-size: clamp(1.125rem, 2vw, 1.25rem);
        color: var(--color-text-muted);
        max-width: 720px;
        word-break: keep-all;
    }

    .code-sheath {
        font-size: 1rem;
        color: var(--color-text-muted);
        word-break: keep-all;
    }

    /* Layout Containers */
    .case {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 2rem;
        width: 100%;
    }

    .batch {
        display: flex;
        flex-wrap: wrap;
        gap: 2rem;
    }

    .batch > * {
        min-width: 0;
    }

    /* Navigation (Inherited) */
    .peak {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.85);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(101, 186, 229, 0.1);
    }

    .cable {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        height: 80px;
    }
    
    .cable > * {
        min-width: 0;
    }

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

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

    .tape > * {
        min-width: 0;
    }

    .tie {
        font-size: 1rem;
        font-weight: 500;
        color: var(--color-text-muted);
        position: relative;
    }

    .tie:hover {
        color: var(--color-primary);
    }

    .tie.active {
        color: var(--color-primary);
        font-weight: 600;
    }

    /* Hero Section - Mosaic Collage Variant */
    .station {
        padding: 8rem 0 6rem;
        background-color: var(--color-bg-page);
        background-image: 
            radial-gradient(circle at 15% 30%, rgba(101, 186, 229, 0.08) 0%, transparent 40%),
            radial-gradient(circle at 85% 70%, rgba(101, 186, 229, 0.12) 0%, transparent 45%),
            linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.95) 100%);
        position: relative;
        overflow: hidden;
    }

    .station::before {
        content: '';
        position: absolute;
        top: -10%;
        right: -5%;
        width: 40vw;
        height: 40vw;
        background: linear-gradient(135deg, var(--color-primary-light) 0%, transparent 100%);
        border-radius: 50%;
        opacity: 0.6;
        z-index: 0;
        pointer-events: none;
    }

    .station .case {
        position: relative;
        z-index: 1;
        display: flex;
        flex-wrap: wrap;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .station .case > * {
        min-width: 0;
    }

    /* Buttons */
    .tap {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 1rem 2.5rem;
        font-size: 1.125rem;
        font-weight: 600;
        border-radius: var(--radius-base);
        border: none;
        cursor: pointer;
        transition: var(--transition);
        margin-top: 2.5rem;
    }

    .tap-primary {
        background-color: var(--color-primary);
        color: white;
        box-shadow: 0 4px 14px 0 rgba(101, 186, 229, 0.39);
    }

    .tap-primary:hover, .tap-primary:focus {
        background-color: var(--color-primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px 0 rgba(101, 186, 229, 0.5);
    }

    /* Topic Focus Section */
    .sheath {
        padding: 6rem 0;
        background: var(--color-bg-surface);
        position: relative;
    }

    .sheath-lead {
        text-align: center;
        margin-bottom: 4rem;
        display: flex;
        flex-wrap: wrap;
        flex-direction: column;
        align-items: center;
    }

    .sheath-lead > * {
        min-width: 0;
    }

    .gram-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
        width: 100%;
    }

    .gram {
        background: var(--color-bg-surface);
        padding: 2.5rem;
        border-radius: var(--radius-large);
        box-shadow: var(--shadow-soft);
        border: 1px solid rgba(101, 186, 229, 0.08);
        transition: var(--transition);
        display: flex;
        flex-wrap: wrap;
        flex-direction: column;
    }

    .gram > * {
        min-width: 0;
    }

    .gram:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(101, 186, 229, 0.2);
    }

    .mark {
        width: 56px;
        height: 56px;
        background: var(--color-primary-light);
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 1.5rem;
        color: var(--color-primary);
    }

    .mark svg {
        width: 28px;
        height: 28px;
        fill: currentColor;
    }

    /* Key Path Section */
    .desk {
        padding: 6rem 0;
        background: linear-gradient(180deg, var(--color-bg-page) 0%, var(--color-bg-surface) 100%);
    }

    .path-batch {
        display: flex;
        flex-wrap: wrap;
        align-items: stretch;
        gap: 3rem;
        margin-top: 3rem;
    }

    .path-batch > * {
        min-width: 0;
    }

    .path-tick {
        flex: 1 1 300px;
        position: relative;
        padding-left: 3rem;
    }

    .path-tick::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        width: 32px;
        height: 32px;
        background: var(--color-primary);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-weight: bold;
        font-size: 14px;
        box-shadow: 0 4px 10px rgba(101, 186, 229, 0.4);
    }

    .path-tick:nth-child(1)::before { content: '1'; }
    .path-tick:nth-child(2)::before { content: '2'; }
    .path-tick:nth-child(3)::before { content: '3'; }

    /* Usage Context Section */
    .bind {
        padding: 6rem 0;
        background: var(--color-bg-surface);
    }

    .context-case {
        display: flex;
        flex-wrap: wrap;
        gap: 4rem;
        align-items: center;
    }

    .context-case > * {
        min-width: 0;
    }

    .context-code {
        flex: 1 1 500px;
    }

    .context-visual {
        flex: 1 1 400px;
        display: flex;
        flex-wrap: wrap;
        gap: 1.5rem;
    }

    .context-visual > * {
        min-width: 0;
    }

    .shield-gram {
        background: var(--color-bg-page);
        padding: 2rem;
        border-radius: var(--radius-large);
        border: 1px solid rgba(101, 186, 229, 0.1);
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        align-items: flex-start;
        gap: 1.5rem;
        transition: var(--transition);
    }

    .shield-gram > * {
        min-width: 0;
    }

    .shield-gram:hover {
        background: var(--color-bg-surface);
        box-shadow: var(--shadow-soft);
    }

    .shield-mark {
        flex-shrink: 0;
        width: 48px;
        height: 48px;
        background: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-primary);
        box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .shield-mark svg {
        width: 24px;
        height: 24px;
    }

    /* Footer */
    .tail {
        background-color: #0f172a;
        color: white;
        padding: 4rem 0 2rem;
    }

    .ground {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        padding-top: 2rem;
        border-top: 1px solid rgba(255,255,255,0.1);
        margin-top: 2rem;
    }
    
    .ground > * {
        min-width: 0;
    }

    .ground-code {
        color: #94a3b8;
        font-size: 0.875rem;
    }

    .ground-brand {
        font-size: 1.25rem;
        font-weight: 700;
        color: white;
    }

    /* Responsive */
    @media (max-width: 768px) {
        .cable {
            justify-content: center;
            height: auto;
            padding: 1rem 0;
            gap: 1rem;
        }
        .tape {
            width: 100%;
            justify-content: center;
            gap: 1.5rem;
        }
        .station {
            padding: 5rem 0 4rem;
        }
        .lead-h1 {
            font-size: 2.25rem;
        }
        .sheath, .desk, .bind {
            padding: 4rem 0;
        }
        .path-tick {
            flex: 1 1 100%;
        }
        .context-case {
            gap: 2rem;
        }
        .ground {
            flex-direction: column;
            gap: 1rem;
            text-align: center;
        }
    }

.cable-peak .cable-case{
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 5vw;
        }

.cable-peak{
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(101, 186, 229, 0.1);
        }

.cable-peak .cable-cable{
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            min-width: 0;
            height: 80px;
        }

.cable-peak .cable-seal{
            display: flex;
            align-items: center;
            min-width: 0;
        }

.cable-peak .cable-seal img{
            height: 36px;
            width: auto;
        }

.cable-peak .cable-tape{
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            min-width: 0;
        }

.cable-peak .cable-tie{
            font-weight: 500;
            color: #1e293b;
            transition: all 0.25s ease;
            position: relative;
            padding: 0.5rem 0;
        }

.cable-peak .cable-tie:hover{
            color: #65bae5;
        }

.cable-peak .cable-tie.active{
            color: #65bae5;
        }

.cable-peak .cable-tie.active::after{
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #65bae5;
            border-radius: 2px;
        }

@media (max-width: 768px){.cable-peak .cable-tape{
                display: none; 
            }}

.cable-peak {
    background: rgb(255, 255, 255);
    background-image: none;
}

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

.ground-ground [role="navigation"],
.ground-ground div,
.ground-ground section,
.ground-ground article,
.ground-ground aside,
.ground-ground p,
.ground-ground h1,
.ground-ground h2,
.ground-ground h3,
.ground-ground h4,
.ground-ground h5,
.ground-ground h6,
.ground-ground a {
    margin: 0;
    padding: 0;
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
    line-height: inherit;
}

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

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

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

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

.ground-ground .ground-case{
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 5vw;
        }

.ground-ground{
            background-color: #020617;
            color: #94a3b8;
            padding: 4rem 0 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

.ground-ground .ground-ground-layout{
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 3rem;
            min-width: 0;
            margin-bottom: 3rem;
        }

.ground-ground .ground-ground-brand{
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: 1rem;
        }

.ground-ground .ground-ground-code{
            max-width: 400px;
            margin-bottom: 1.5rem;
        }

.ground-ground .ground-ground-tape{
            display: flex;
            flex-direction: column;
            gap: 1rem;
            min-width: 0;
        }

.ground-ground .ground-ground-lead{
            color: white;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

.ground-ground .ground-ground-tie{
            transition: all 0.25s ease;
        }

.ground-ground .ground-ground-tie:hover{
            color: #65bae5;
        }

.ground-ground .ground-ground-bottom{
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            min-width: 0;
            gap: 1rem;
            font-size: 0.875rem;
        }