/* CSS Variables - 继承首页视觉基因 */
        :root {
            --bg-main: #faf9f8;
            --bg-pure: #ffffff;
            --text-primary: #1a1a1a;
            --text-secondary: #4a4a4a;
            --text-muted: #8c8c8c;
            --primary: #e471b4;
            --primary-hover: #d65da3;
            --gradient: linear-gradient(135deg, #e471b4 0%, #ff8c82 100%);
            --radius-lg: 24px;
            --radius-md: 18px;
            --shadow-soft: 0 12px 40px rgba(228, 113, 180, 0.08);
            --shadow-hover: 0 20px 50px rgba(228, 113, 180, 0.15);
            --transition: all 0.15s ease;
            --max-width: 1240px;
        }

        /* Reset & Base */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            word-break: break-word;
            overflow-wrap: break-word;
        }
        img, svg {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        
        /* Flexbox Utility Rules (强制要求) */
        .stack {
            display: flex;
            flex-wrap: wrap;
        }
        .stack > * {
            min-width: 0;
        }

        /* Header & Navigation (强制复用) */
        .crown {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
        }
        .ribbon {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 16px 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .ribbon > * { min-width: 0; }
        .crest {
            flex-shrink: 0;
        }
        .crest img {
            height: 32px;
            width: auto;
        }
        .index {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            align-items: center;
        }
        .index > * { min-width: 0; }
        .ribbon-jump {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: normal;
        }
        .ribbon-jump:hover, 
        .ribbon-jump.active {
            color: var(--primary);
        }

        /* Main Binder */
        .binder {
            width: 100%;
        }

        /* Typography */
        .topic-xl {
            font-weight: 800;
            letter-spacing: -0.02em;
            font-size: clamp(2.5rem, 5vw, 4.5rem);
            line-height: 1.1;
            color: var(--text-primary);
            white-space: normal;
            margin-bottom: 24px;
        }
        .topic-lg {
            font-weight: 800;
            letter-spacing: -0.01em;
            font-size: clamp(2rem, 3.5vw, 2.5rem);
            line-height: 1.2;
            color: var(--text-primary);
            white-space: normal;
            margin-bottom: 16px;
        }
        .topic-md {
            font-weight: 700;
            font-size: 1.25rem;
            line-height: 1.4;
            color: var(--text-primary);
            white-space: normal;
            margin-bottom: 12px;
        }
        .ink-lead {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 40px;
            line-height: 1.6;
        }
        .ink-base {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Buttons/Stamps */
        .stamp-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            padding: 18px 40px;
            background: var(--gradient);
            color: #fff;
            font-weight: 700;
            font-size: 1.125rem;
            border-radius: 100px;
            box-shadow: var(--shadow-soft);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            transform: translateY(0);
        }
        .stamp-primary:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .stamp-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            background: var(--bg-main);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            border-radius: 100px;
            border: 1px solid rgba(0, 0, 0, 0.08);
            transition: var(--transition);
        }
        .stamp-secondary:hover {
            background: var(--bg-pure);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Section 1: Hero (Acquire) - split_diagonal variant */
        .cover {
            background: var(--bg-pure);
            padding: 80px 24px;
            position: relative;
            overflow: hidden;
        }
        .cover-ream {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }
        .cover-ream > * { min-width: 0; }
        .cover-leaf {
            flex: 1 1 480px;
            z-index: 2;
        }
        .cover-plate {
            flex: 1 1 540px;
            position: relative;
            z-index: 1;
        }
        .cover-plate-inner {
            border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 120px;
            overflow: hidden;
            box-shadow: var(--shadow-soft);
            transform: translateZ(0); /* Force hardware acceleration */
        }
        /* Background decor */
        .cover::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -5%;
            width: 60%;
            height: 120%;
            background: linear-gradient(to bottom right, rgba(228, 113, 180, 0.05), rgba(255, 140, 130, 0.05));
            transform: skewX(-15deg);
            z-index: 0;
            border-radius: 40px;
        }
        
        .sys-detect {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-top: 24px;
        }
        .sys-detect-glyph {
            width: 16px;
            height: 16px;
            fill: currentColor;
        }

        /* Section 2: Platform Selection (Comparison) */
        .deck {
            padding: 100px 24px;
            background: var(--bg-main);
        }
        .deck-ream {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .deck-head {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 64px auto;
        }
        .deck-plate-wrap {
            margin-bottom: 64px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-soft);
            border: 1px solid rgba(0,0,0,0.04);
        }
        .deck-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }
        .pane-platform {
            background: var(--bg-pure);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-soft);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            transform: translateY(0);
        }
        .pane-platform:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .glyph-wrap {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: rgba(228, 113, 180, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary);
        }
        .glyph-wrap svg {
            width: 32px;
            height: 32px;
        }
        .platform-actions {
            margin-top: auto;
            padding-top: 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .platform-actions > * { min-width: 0; }

        /* Section 3: Value Proposition (Comparison) */
        .folder {
            padding: 100px 24px;
            background: var(--bg-pure);
            border-top: 1px solid rgba(0,0,0,0.03);
        }
        .folder-ream {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .folder-head {
            margin-bottom: 64px;
        }
        .folder-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }
        .pane-value {
            display: flex;
            gap: 24px;
        }
        .pane-value .glyph-wrap {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(228, 113, 180, 0.1) 0%, rgba(255, 140, 130, 0.1) 100%);
            color: var(--primary);
        }

        /* Footer */
        .base {
            background: #111827;
            color: rgba(255, 255, 255, 0.6);
            padding: 60px 24px;
            text-align: center;
            font-size: 0.875rem;
        }
        .base-ream {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
        }
        .base-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.02em;
        }
        .base-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
        }
        .base-links > * { min-width: 0; }
        .base-links a {
            transition: var(--transition);
        }
        .base-links a:hover {
            color: #ffffff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .topic-xl { font-size: 3rem; }
            .cover-plate-inner { border-radius: var(--radius-lg); }
        }
        @media (max-width: 768px) {
            .index { display: none; /* Simplification for mobile [role="navigation"] as per constraints */ }
            .cover { padding: 60px 24px; }
            .cover-ream { flex-direction: column; }
            .cover::before { display: none; }
            .deck { padding: 60px 24px; }
            .folder { padding: 60px 24px; }
            .pane-value { flex-direction: column; gap: 16px; }
        }

.ribbon-crown {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--ink-dark);
}
.ribbon-crown,
.ribbon-crown *,
.ribbon-crown *::before,
.ribbon-crown *::after {
    box-sizing: border-box;
}

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

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

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

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

.ribbon-crown a.ribbon-ribbon-jump {
    --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;
}

.ribbon-crown a.ribbon-ribbon-jump,
.ribbon-crown a.ribbon-ribbon-jump:hover,
.ribbon-crown a.ribbon-ribbon-jump:focus,
.ribbon-crown a.ribbon-ribbon-jump:active,
.ribbon-crown a.ribbon-ribbon-jump.active,
.ribbon-crown a.ribbon-ribbon-jump[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);
}

.ribbon-crown{
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            padding: 15px 5vw;
        }

.ribbon-crown .ribbon-ribbon{
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }

.ribbon-crown .ribbon-crest{
            flex: 0 0 auto;
            min-width: 0;
        }

.ribbon-crown .ribbon-crest img{
            height: 32px;
            display: block;
        }

.ribbon-crown .ribbon-index{
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            align-items: center;
        }

.ribbon-crown .ribbon-ribbon-jump{
            text-decoration: none;
            color: #4a4a4a;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.15s ease;
            position: relative;
        }

.ribbon-crown .ribbon-ribbon-jump:hover, .ribbon-crown .ribbon-ribbon-jump:focus{
            color: #e471b4;
        }

.ribbon-crown .ribbon-ribbon-jump.active{
            color: #e471b4;
        }

.ribbon-crown .ribbon-ribbon-jump.active::after{
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 100%;
            height: 2px;
            background: #e471b4;
            border-radius: 2px;
        }

@media (max-width: 768px){.ribbon-crown .ribbon-index{
                display: none; 
            }}

.ribbon-crown {
    background: rgb(255, 255, 255);
    background-image: none;
}

.endnote-base {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--ink-dark);
}
.endnote-base,
.endnote-base *,
.endnote-base *::before,
.endnote-base *::after {
    box-sizing: border-box;
}

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

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

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

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

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

.endnote-base .endnote-ink{
            word-break: break-word;
            overflow-wrap: break-word;
        }

.endnote-base p.endnote-ink{
            word-break: keep-all;
        }

.endnote-base{
            background: #ffffff;
            padding: 40px 5vw;
            border-top: 1px solid rgba(0, 0, 0, 0.06);
            text-align: center;
            color: #8c8c8c;
        }

.endnote-base .endnote-base-stack{
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 20px;
        }

.endnote-base .endnote-base-jump{
            color: #4a4a4a;
            text-decoration: none;
            transition: all 0.15s ease;
        }

.endnote-base .endnote-base-jump:hover, .endnote-base .endnote-base-jump:focus{
            color: #e471b4;
        }