:root {
            --primary: #48b6e9;
            --primary-soft: rgba(72, 182, 233, 0.1);
            --shadow: 0 12px 40px rgba(0,0,0,0.08);
            --radius: 14px;
            --text-dark: #1d1d1f;
            --text-gray: #86868b;
            --bg-light: #f5f5f7;
            --white: #ffffff;
        }

        * {
            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-dark);
            background-color: var(--white);
            -webkit-font-smoothing: antialiased;
            word-break: break-word;
        }

        /* 强制导航栏样式复用 */
        .crest {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            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;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
        }

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

        .seal img {
            height: 100%;
            width: auto;
        }

        .scroll {
            display: flex;
            gap: 32px;
        }

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

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

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

        /* 布局容器 */
        .sheath {
            width: 100%;
            overflow: hidden;
        }

        main {
            padding-top: 64px;
        }

        /* 模块样式 */
        .cover {
            min-height: 90vh;
            display: flex;
            align-items: center;
            padding: 80px 24px;
            background: linear-gradient(135deg, #f5faff 0%, #ffffff 50%, #f0f7ff 100%);
            position: relative;
        }

        .spread {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 60px;
        }

        .canvas {
            flex: 1;
            min-width: 320px;
        }

        .topic-folder {
            font-size: clamp(36px, 5vw, 64px);
            line-height: 1.1;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 24px;
            color: var(--text-dark);
        }

        .prose {
            font-size: 18px;
            color: var(--text-gray);
            margin-bottom: 40px;
            max-width: 540px;
        }

        .stamp-primary {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            box-shadow: 0 10px 30px rgba(72, 182, 233, 0.3);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .stamp-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 35px rgba(72, 182, 233, 0.4);
        }

        /* AI 对话框视觉 */
        .folio-chat {
            flex: 1;
            min-width: 320px;
            background: var(--white);
            border-radius: 20px;
            box-shadow: var(--shadow);
            padding: 30px;
            border: 1px solid rgba(0,0,0,0.05);
            position: relative;
        }

        .bullet-chat {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .bullet-chat li {
            padding: 15px 20px;
            border-radius: 12px;
            max-width: 85%;
            font-size: 15px;
        }

        .bullet-chat li.user {
            align-self: flex-end;
            background: var(--primary-soft);
            color: var(--primary);
            border-bottom-right-radius: 2px;
        }

        .bullet-chat li.ai {
            align-self: flex-start;
            background: #f1f1f1;
            color: var(--text-dark);
            border-bottom-left-radius: 2px;
        }

        /* 功能矩阵区 */
        .jacket {
            padding: 100px 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .batch {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 60px;
        }

        .memo {
            flex: 1;
            min-width: 300px;
            background: var(--white);
            padding: 40px;
            border-radius: var(--radius);
            border: 1px solid #d2d2d7;
            transition: all 0.25s ease;
        }

        .memo:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .glyph-box {
            width: 56px;
            height: 56px;
            background: var(--primary-soft);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary);
        }

        .topic-sub {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        /* 数据工作流区 */
        .rule-break {
            background: #000;
            color: #fff;
            padding: 100px 24px;
        }

        .plate-sheath {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
            align-items: center;
        }

        .plate-plate {
            flex: 1;
            min-width: 320px;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
        }

        .plate-plate img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 阅读理解区 */
        .binder {
            padding: 100px 24px;
            background: var(--bg-light);
        }

        .sheet-center {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .rule-scroll {
            margin-top: 50px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            text-align: left;
        }

        .bullet-bullet {
            background: var(--white);
            padding: 24px;
            border-radius: 12px;
            display: flex;
            gap: 16px;
        }

        /* 页脚复用逻辑 */
        .tail {
            background: #f5f5f7;
            padding: 60px 24px;
            border-top: 1px solid #d2d2d7;
        }

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

        .margin-brand {
            flex: 1;
            min-width: 200px;
        }

        .margin-brand span {
            font-weight: 700;
            font-size: 20px;
            display: block;
            margin-bottom: 16px;
        }

        .batch-links {
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
        }

        .folder-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .folder-links h4 {
            font-size: 14px;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .knot-knot {
            text-decoration: none;
            color: var(--text-gray);
            font-size: 14px;
            transition: color 0.2s;
        }

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

        @media (max-width: 768px) {
            .scroll {
                display: none; /* 移动端简化 */
            }
            .cover {
                padding-top: 100px;
                text-align: center;
            }
            .prose {
                margin-left: auto;
                margin-right: auto;
            }
            .spread, .plate-sheath {
                flex-direction: column;
            }
        }

.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;
        }