:root {
            --primary: #3979f9;
            --accent: #ea4335;
            --radius: 21px;
            --shadow: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-hover: 0 20px 50px rgba(57,121,249,0.15);
            --bg: #f8f9fa;
            --ink: #202124;
            --mute: #5f6368;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        /* 强制复用首页导航栏样式 */
        .tabstrip {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .omnibar {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0.8rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

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

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

        .coil {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            min-width: 0;
        }

        .knot {
            text-decoration: none;
            color: var(--mute);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 0.8rem;
            border-radius: 10px;
            transition: 0.15s ease;
            word-break: keep-all;
        }

        .knot:hover {
            color: var(--primary);
            background: rgba(57, 121, 249, 0.05);
        }

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

        /* 核心布局结构 */
        .sandbox {
            padding-top: 80px;
        }

        .shroud {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* Hero下载区 - 语义角色: acquire */
        .canvas {
            min-height: 650px;
            display: flex;
            align-items: center;
            padding: 4rem 0;
            background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 100%);
            border-bottom-left-radius: 60px;
            border-bottom-right-radius: 60px;
            margin-bottom: 4rem;
        }

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

        .grain-focus {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .pith {
            font-size: clamp(2rem, 4.5vw, 3.8rem);
            line-height: 1.15;
            color: #202124;
            font-weight: 800;
            letter-spacing: -1.5px;
            margin-bottom: 1.5rem;
        }

        .etch {
            font-size: 1.25rem;
            color: var(--mute);
            max-width: 580px;
            margin-bottom: 2.5rem;
        }

        .lens-frame {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .lens {
            width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transform: perspective(1000px) rotateY(-5deg);
            transition: 0.15s ease;
        }

        .lens:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        .nexus-triggers {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
        }

        .spark {
            display: inline-flex;
            align-items: center;
            background: var(--primary);
            color: white;
            padding: 1.1rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            box-shadow: 0 10px 30px rgba(57,121,249,0.3);
            border: 2px solid transparent;
            transition: 0.15s ease;
            gap: 0.8rem;
        }

        .spark:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            background: #2a66e6;
        }

        /* 版本对比区 - 语义角色: comparison */
        .skyline {
            padding: 6rem 0;
            background: white;
            position: relative;
        }

        .cap-pith {
            text-align: center;
            margin-bottom: 4rem;
        }

        .cap-pith h2 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .facet-nexus {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
        }

        .facet {
            background: #fff;
            padding: 2.5rem;
            border-radius: var(--radius);
            border: 1px solid #eee;
            transition: 0.15s ease;
            position: relative;
            overflow: hidden;
            min-width: 0;
        }

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

        .glyph-box {
            width: 56px;
            height: 56px;
            background: rgba(57, 121, 249, 0.08);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }

        .facet-pith {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .facet-etch {
            color: var(--mute);
            font-size: 0.95rem;
            margin-bottom: 2rem;
        }

        .trigger-knot {
            display: inline-flex;
            align-items: center;
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            gap: 0.5rem;
            transition: 0.15s ease;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }

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

        /* 安装步骤区 - 语义角色: steps */
        .vessel {
            padding: 8rem 0;
            background: #fdfdfd;
        }

        .step-path {
            display: flex;
            flex-wrap: wrap;
            gap: 3rem;
            justify-content: space-between;
            counter-reset: step-counter;
        }

        .step-grain {
            flex: 1;
            min-width: 260px;
            position: relative;
            padding: 2.5rem;
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            counter-increment: step-counter;
        }

        .step-grain::before {
            content: counter(step-counter);
            position: absolute;
            top: -20px;
            right: 30px;
            font-size: 5rem;
            font-weight: 900;
            color: rgba(57, 121, 249, 0.05);
            line-height: 1;
        }

        .step-pith {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--ink);
        }

        .step-etch {
            color: var(--mute);
            font-size: 1rem;
        }

        /* 页脚 */
        .subbase {
            background: #202124;
            color: #bdc1c6;
            padding: 4rem 0 2rem;
        }

        .bedrock {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 3rem;
        }

        .stem-column {
            flex: 1;
            min-width: 200px;
        }

        .stem-pith {
            color: white;
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }

        .stem-knot {
            display: block;
            color: #9aa0a6;
            text-decoration: none;
            margin-bottom: 0.8rem;
            transition: 0.15s ease;
            font-size: 0.9rem;
        }

        .stem-knot:hover {
            color: white;
        }

        .stem-bottom {
            margin-top: 4rem;
            padding-top: 2rem;
            border-top: 1px solid #3c4043;
            text-align: center;
            font-size: 0.85rem;
        }

        .brand-etch {
            font-weight: 700;
            color: white;
            margin-bottom: 0.5rem;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .streak { gap: 2rem; }
            .pith { font-size: 3rem; }
        }

        @media (max-width: 768px) {
            .omnibar { justify-content: center; gap: 1rem; }
            .coil { justify-content: center; }
            .canvas { padding: 3rem 0; text-align: center; }
            .streak { flex-direction: column; }
            .etch { margin: 0 auto 2.5rem; }
            .nexus-triggers { justify-content: center; }
            .lens { transform: none; }
            .facet-nexus { grid-template-columns: 1fr; }
        }

.tabstrip-tabstrip {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    word-break: keep-all;
    color: var(--dark);
}
.tabstrip-tabstrip,
.tabstrip-tabstrip *,
.tabstrip-tabstrip *::before,
.tabstrip-tabstrip *::after {
    box-sizing: border-box;
}

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

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

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

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

.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active,
.tabstrip-tabstrip a.tabstrip-knot {
    --aisite-shell-nav-padding: 0.5rem 0.8rem;
    --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;
}

.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active,
.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active:hover,
.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active:focus,
.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active:active,
.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active.active,
.tabstrip-tabstrip a.tabstrip-knot.tabstrip-active[aria-current="page"],
.tabstrip-tabstrip a.tabstrip-knot,
.tabstrip-tabstrip a.tabstrip-knot:hover,
.tabstrip-tabstrip a.tabstrip-knot:focus,
.tabstrip-tabstrip a.tabstrip-knot:active,
.tabstrip-tabstrip a.tabstrip-knot.active,
.tabstrip-tabstrip a.tabstrip-knot[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);
}

.tabstrip-tabstrip{ position: fixed; top: 0; width: 100%; z-index: 1000; background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(15px); border-bottom: 1px solid rgba(0,0,0,0.05); }

.tabstrip-tabstrip .tabstrip-omnibar{ max-width: 1400px; margin: 0 auto; padding: 0 2rem; height: 72px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; }

.tabstrip-tabstrip .tabstrip-emblem{ height: 36px; display: flex; align-items: center; }

.tabstrip-tabstrip .tabstrip-emblem img{ height: 100%; width: auto; }

.tabstrip-tabstrip .tabstrip-coil{ display: flex; gap: 1.5rem; flex-wrap: wrap; }

.tabstrip-tabstrip .tabstrip-knot{ text-decoration: none; color: #5f6368; font-weight: 500; font-size: 15px; transition: 0.15s ease; padding: 0.5rem 0.8rem; border-radius: 12px; }

.tabstrip-tabstrip .tabstrip-knot:hover{ color: #3979f9; background: rgba(57,121,249,0.05); }

.tabstrip-tabstrip .tabstrip-knot.tabstrip-active{ color: #3979f9; position: relative; }

.tabstrip-tabstrip .tabstrip-knot.tabstrip-active::after{ content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 4px; height: 4px; border-radius: 50%; background: #3979f9; }

@media (max-width: 768px){.tabstrip-tabstrip .tabstrip-omnibar{ height: auto; padding: 1rem; }

.tabstrip-tabstrip .tabstrip-coil{ margin-top: 1rem; width: 100%; justify-content: center; }}

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

.subbase-subbase {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    word-break: keep-all;
    color: var(--dark);
}
.subbase-subbase,
.subbase-subbase *,
.subbase-subbase *::before,
.subbase-subbase *::after {
    box-sizing: border-box;
}

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

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

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

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

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

.subbase-subbase{ background: #202124; padding: 4rem 2rem; border-top: 1px solid rgba(255,255,255,0.1); color: #9aa0a6; }

.subbase-subbase .subbase-subbase-nexus{ max-width: 1400px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 2rem; }

.subbase-subbase .subbase-brand-etch{ font-size: 1.5rem; font-weight: 700; color: white; }

.subbase-subbase .subbase-legal-coil{ display: flex; gap: 2rem; flex-wrap: wrap; }

.subbase-subbase .subbase-legal-knot{ text-decoration: none; color: #9aa0a6; font-size: 14px; transition: 0.15s ease; }

.subbase-subbase .subbase-legal-knot:hover{ color: white; }