:root {
            --primary: #48b6e9;
            --primary-soft: rgba(72, 182, 233, 0.1);
            --shadow-deep: 0 20px 40px rgba(0,0,0,0.12);
            --shadow-light: 0 4px 12px rgba(0,0,0,0.05);
            --radius: 14px;
            --bg-gray: #f5f5f7;
            --text-main: #1d1d1f;
            --text-sub: #86868b;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--text-main);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
        }

        /* 导航继承与复用 */
        .crest {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .ribbon {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            height: 64px;
        }

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

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

        .scroll {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .guide {
            text-decoration: none;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.25s ease;
            position: relative;
        }

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

        .guide.active {
            color: var(--primary);
        }

        .guide.active::after {
            content: '';
            position: absolute;
            bottom: -21px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
        }

        /* 主体容器 */
        main {
            padding-top: 64px;
        }

        /* Hero Download Section */
        .canvas {
            min-height: 85vh;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            background: radial-gradient(circle at 10% 20%, rgba(72, 182, 233, 0.05) 0%, rgba(255, 255, 255, 1) 90%);
            padding: 80px 5%;
            overflow: hidden;
            position: relative;
        }

        .spread {
            flex: 1;
            min-width: 320px;
            padding-right: 40px;
            z-index: 2;
        }

        .topic-jacket {
            font-size: clamp(36px, 6vw, 68px);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            letter-spacing: -0.03em;
            word-break: keep-all;
        }

        .topic-jacket span {
            color: var(--primary);
            display: block;
        }

        .prose-sheath {
            font-size: clamp(18px, 2vw, 22px);
            color: var(--text-sub);
            max-width: 600px;
            margin-bottom: 48px;
            word-break: break-word;
        }

        .press-batch {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
        }

        .press-key {
            display: inline-flex;
            align-items: center;
            padding: 18px 42px;
            background: var(--primary);
            color: white;
            border-radius: 50px;
            font-weight: 600;
            font-size: 18px;
            text-decoration: none;
            box-shadow: 0 10px 30px rgba(72, 182, 233, 0.3);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .press-key:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(72, 182, 233, 0.4);
        }

        .plate-sheath {
            flex: 1.2;
            min-width: 400px;
            position: relative;
        }

        .plate-stage {
            width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow-deep);
            transform: perspective(1000px) rotateY(-10deg) rotateX(5deg);
        }

        /* Platform Selection Article */
        .binder {
            padding: 100px 5%;
            background: var(--bg-gray);
        }

        .topic-folder {
            text-align: center;
            font-size: clamp(28px, 4vw, 42px);
            margin-bottom: 60px;
            font-weight: 700;
        }

        .folio-rule {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .folio {
            background: white;
            padding: 40px;
            border-radius: var(--radius);
            border: 1px solid #e5e5e7;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .folio:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-deep);
            border-color: var(--primary);
        }

        .glyph-sheath {
            width: 64px;
            height: 64px;
            background: var(--primary-soft);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary);
        }

        .glyph-sheath svg {
            width: 32px;
            height: 32px;
        }

        .folio-topic {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .folio-prose {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .knot-key {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: opacity 0.2s;
        }

        .knot-key:hover {
            opacity: 0.8;
        }

        /* Update Highlights Div */
        .jacket-batch {
            padding: 100px 5%;
            max-width: 1200px;
            margin: 0 auto;
        }

        .sheet-rule {
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
            align-items: center;
            margin-top: 60px;
        }

        .sheet-rule:nth-child(even) {
            flex-direction: row-reverse;
        }

        .sheet-plate {
            flex: 1;
            min-width: 300px;
        }

        .sheet-plate img {
            width: 100%;
            border-radius: var(--radius);
            box-shadow: var(--shadow-light);
        }

        .sheet-prose {
            flex: 1;
            min-width: 300px;
        }

        .sheet-topic {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .sheet-bullet {
            list-style: none;
            margin-top: 24px;
        }

        .bullet-knot {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
            font-size: 16px;
        }

        .bullet-knot svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        /* Footer */
        .tail {
            background: #1d1d1f;
            color: white;
            padding: 80px 5% 40px;
        }

        .endnote-bind {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 60px;
        }

        .endnote-folio {
            flex: 1;
            min-width: 200px;
        }

        .endnote-topic {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 24px;
            color: #f5f5f7;
        }

        .endnote-bullet {
            list-style: none;
        }

        .endnote-bullet li {
            margin-bottom: 12px;
        }

        .endnote-bullet a {
            color: #a1a1a6;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s;
        }

        .endnote-bullet a:hover {
            color: white;
        }

        .margin-rule {
            max-width: 1200px;
            margin: 40px auto 0;
            text-align: center;
            color: #86868b;
            font-size: 13px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .scroll {
                display: none; /* 简化移动端 */
            }
            .plate-sheath {
                min-width: 100%;
                margin-top: 40px;
            }
            .plate-stage {
                transform: none;
            }
            .press-batch {
                justify-content: center;
            }
            .spread {
                text-align: center;
                padding-right: 0;
            }
        }

        /* 动画增强 */
        .visible {
            animation: fadeIn 0.8s ease forwards;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

.ribbon-crest {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    word-break: break-word;
    color: var(--deep);
}
.ribbon-crest,
.ribbon-crest *,
.ribbon-crest *::before,
.ribbon-crest *::after {
    box-sizing: border-box;
}

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

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

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

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

.ribbon-crest a.ribbon-guide {
    --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-crest a.ribbon-guide,
.ribbon-crest a.ribbon-guide:hover,
.ribbon-crest a.ribbon-guide:focus,
.ribbon-crest a.ribbon-guide:active,
.ribbon-crest a.ribbon-guide.active,
.ribbon-crest a.ribbon-guide[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-crest{
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

.ribbon-crest .ribbon-ribbon{
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 30px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

.ribbon-crest .ribbon-seal{
            height: 32px;
            display: flex;
            align-items: center;
        }

.ribbon-crest .ribbon-seal img{
            height: 100%;
            display: block;
        }

.ribbon-crest .ribbon-scroll{
            display: flex;
            gap: 32px;
            list-style: none;
            flex-wrap: wrap;
        }

.ribbon-crest .ribbon-guide{
            text-decoration: none;
            color: #424245;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.25s ease;
            position: relative;
        }

.ribbon-crest .ribbon-guide:hover{
            color: #48b6e9;
        }

.ribbon-crest .ribbon-guide.active{
            color: #48b6e9;
        }

.ribbon-crest .ribbon-guide.active::after{
            content: '';
            position: absolute;
            bottom: -22px;
            left: 0;
            width: 100%;
            height: 2px;
            background: #48b6e9;
        }

@media (max-width: 768px){.ribbon-crest .ribbon-ribbon{ height: auto; padding: 15px; flex-direction: column; gap: 15px; }

.ribbon-crest .ribbon-scroll{ justify-content: center; gap: 15px; }}

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

.endnote-tail {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    word-break: break-word;
    color: var(--deep);
}
.endnote-tail,
.endnote-tail *,
.endnote-tail *::before,
.endnote-tail *::after {
    box-sizing: border-box;
}

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

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

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

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

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

.endnote-tail{
            background: #f5f5f7;
            padding: 80px 0 40px;
            border-top: 1px solid #d2d2d7;
        }

.endnote-tail .endnote-endnote{
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 30px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
        }

.endnote-tail .endnote-margin-topic{
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 24px;
            color: #1d1d1f;
        }

.endnote-tail .endnote-bind-links{
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

.endnote-tail .endnote-knot-tail{
            text-decoration: none;
            color: #424245;
            font-size: 14px;
            transition: color 0.25s ease;
        }

.endnote-tail .endnote-knot-tail:hover{
            color: #48b6e9;
        }

.endnote-tail .endnote-tail-bottom{
            grid-column: 1 / -1;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #86868b;
            flex-wrap: wrap;
            gap: 20px;
        }