/* 基础变量与重置 */
        :root {
            --color-bg: #0b0b14;
            --color-surface: #151528;
            --color-surface-hover: #1c1c36;
            --color-primary: #6d6fea;
            --color-primary-light: #8e8fff;
            --color-text: #f0f0f5;
            --color-muted: #a0a0ba;
            --color-border: rgba(109, 111, 234, 0.2);
            --color-glow: rgba(109, 111, 234, 0.15);
            
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 20px;
            
            --shadow-sm: 0 4px 12px rgba(0,0,0,0.2);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 30px var(--color-glow);
            
            --transition: all 0.25s ease;
            --width-main: 1280px;
            --width-read: 900px;
            
            --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        /* 文本换行规范 */
        .fur, .crest, .trail {
            word-break: break-word;
            overflow-wrap: break-word;
        }
        .fur {
            word-break: keep-all;
            line-height: 1.7;
        }
        .crest {
            white-space: normal;
        }

        /* 强制Flex规范 */
        .nexus, .orbit, .skulk, .ash, .hearth {
            display: flex;
            flex-wrap: wrap;
        }
        .nexus > *, .orbit > *, .skulk > *, .ash > *, .hearth > * {
            min-width: 0;
        }

        /* 导航区域 (apex -> orbit -> snout/skulk) */
        .apex {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 20, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
        }

        .apex .orbit {
            max-width: var(--width-main);
            margin: 0 auto;
            padding: 1rem 2rem;
            justify-content: space-between;
            align-items: center;
        }

        .snout {
            display: flex;
            align-items: center;
        }

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

        .skulk {
            gap: 2rem;
            align-items: center;
        }

        .trail {
            color: var(--color-muted);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }

        .trail:hover, .trail:focus {
            color: var(--color-text);
            outline: none;
        }

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

        .trail.active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
        }

        /* 主内容区 */
        main {
            padding-top: 80px; /* 补偿固定导航 */
        }

        /* 通用容器 */
        .biome {
            max-width: var(--width-main);
            margin: 0 auto;
            padding: 6rem 2rem;
        }

        /* Hero: 在所有设备间保持同步 (blaze) */
        .blaze {
            position: relative;
            padding: 8rem 2rem 6rem;
            overflow: hidden;
            background: radial-gradient(circle at 50% 30%, rgba(109, 111, 234, 0.08) 0%, transparent 60%);
        }

        .blaze .hearth {
            max-width: var(--width-read);
            margin: 0 auto;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 3rem;
        }

        .blaze .crest {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #fff 0%, var(--color-muted) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .blaze .fur {
            font-size: clamp(1.1rem, 2vw, 1.25rem);
            color: var(--color-muted);
            max-width: 600px;
        }

        /* Data UI: 矢量状态面板 */
        .pelt {
            width: 100%;
            max-width: 800px;
            height: 300px;
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 4rem;
        }

        .paw-device {
            width: 160px;
            height: 160px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            display: flex;
            justify-content: center;
            align-items: center;
            box-shadow: var(--shadow-glow);
            position: relative;
            z-index: 2;
        }

        .paw-device svg {
            width: 80px;
            height: 80px;
            stroke: var(--color-primary-light);
            stroke-width: 1.5;
            fill: none;
        }

        .ring-sync {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 60%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-border), transparent);
            z-index: 1;
        }

        .twig-dot {
            position: absolute;
            width: 8px;
            height: 8px;
            background: var(--color-primary-light);
            border-radius: 50%;
            top: 50%;
            left: 20%;
            transform: translateY(-50%);
            box-shadow: 0 0 10px var(--color-primary);
            animation: syncFlow 3s infinite linear;
        }

        .twig-dot:nth-child(2) {
            animation-delay: 1.5s;
        }

        @keyframes syncFlow {
            0% { left: 20%; opacity: 0; transform: translateY(-50%) scale(0.5); }
            20% { opacity: 1; transform: translateY(-50%) scale(1); }
            80% { opacity: 1; transform: translateY(-50%) scale(1); }
            100% { left: 80%; opacity: 0; transform: translateY(-50%) scale(0.5); }
        }

        /* 类别: 您关心的内容 (globe) */
        .globe {
            background-color: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .globe .biome {
            display: flex;
            flex-direction: column;
            gap: 4rem;
        }
        
        .globe .crest {
            font-size: 2.5rem;
            text-align: center;
            font-weight: 700;
        }

        .globe .nexus {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            width: 100%;
        }

        .ember {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 2.5rem 2rem;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .ember:hover {
            transform: translateY(-5px);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }

        .ember .paw {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: rgba(109, 111, 234, 0.1);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .ember .paw svg {
            width: 32px;
            height: 32px;
            stroke: var(--color-primary-light);
            stroke-width: 2;
            fill: none;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .ember .crest {
            font-size: 1.25rem;
            font-weight: 600;
            text-align: left;
        }

        .ember .fur {
            color: var(--color-muted);
            font-size: 0.95rem;
        }

        /* 加密: 端到端加密 (aurora) */
        .aurora .biome {
            display: flex;
            align-items: center;
            gap: 4rem;
        }

        .aurora .hearth {
            flex: 1;
            flex-direction: column;
            gap: 1.5rem;
            min-width: 300px;
        }

        .aurora .crest {
            font-size: 2.5rem;
            font-weight: 700;
        }

        .aurora .fur {
            color: var(--color-muted);
            font-size: 1.1rem;
        }

        /* 加密数据流转视觉 */
        .aurora .pelt {
            flex: 1;
            min-width: 300px;
            height: 350px;
            background: radial-gradient(circle at center, rgba(109, 111, 234, 0.1) 0%, transparent 70%);
            border-radius: var(--radius-lg);
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .shield-paw {
            position: relative;
            z-index: 2;
        }
        
        .shield-paw svg {
            width: 120px;
            height: 120px;
            stroke: var(--color-primary);
            stroke-width: 1.5;
            fill: none;
            filter: drop-shadow(0 0 10px rgba(109, 111, 234, 0.5));
        }

        .orbit-ring {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            border: 1px dashed var(--color-border);
            border-radius: 50%;
            animation: spin 20s linear infinite;
        }

        .orbit-ring:nth-child(2) { width: 200px; height: 200px; }
        .orbit-ring:nth-child(3) { width: 280px; height: 280px; animation-direction: reverse; animation-duration: 25s;}

        @keyframes spin {
            100% { transform: translate(-50%, -50%) rotate(360deg); }
        }

        /* 设置: 三步开启 (flare) */
        .flare {
            background: linear-gradient(180deg, transparent, var(--color-surface));
            padding-bottom: 8rem;
        }

        .flare .biome {
            flex-direction: column;
            align-items: center;
            gap: 4rem;
        }

        .flare .crest {
            font-size: 2.5rem;
            text-align: center;
        }

        .flare .nexus {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 2rem;
            width: 100%;
            max-width: var(--width-read);
        }

        .gecko {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }

        .gecko:hover {
            border-color: var(--color-primary-light);
            background: var(--color-surface-hover);
        }

        .gecko::before {
            content: attr(data-step);
            position: absolute;
            top: -20px;
            right: -10px;
            font-size: 8rem;
            font-weight: 900;
            color: rgba(109, 111, 234, 0.05);
            line-height: 1;
            transition: var(--transition);
        }

        .gecko:hover::before {
            color: rgba(109, 111, 234, 0.1);
            transform: scale(1.1);
        }

        .gecko .crest {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            position: relative;
            z-index: 1;
        }

        .gecko .fur {
            color: var(--color-muted);
            font-size: 0.9rem;
            position: relative;
            z-index: 1;
        }

        .spark {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            padding: 1rem 2.5rem;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            margin-top: 2rem;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(109, 111, 234, 0.4);
            border: none;
            cursor: pointer;
        }

        .spark:hover, .spark:focus {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(109, 111, 234, 0.6);
            background: var(--color-primary-light);
            outline: none;
        }

        /* 页脚 (root) */
        .root {
            background-color: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding: 4rem 2rem;
        }

        .root .ash {
            max-width: var(--width-main);
            margin: 0 auto;
            justify-content: space-between;
            align-items: center;
            gap: 2rem;
        }

        .tail {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .root .crest {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
        }

        .root .fur {
            color: var(--color-muted);
            font-size: 0.85rem;
        }

        .root .nexus {
            gap: 1.5rem;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .aurora .biome {
                flex-direction: column;
                text-align: center;
            }
            .aurora .hearth {
                align-items: center;
            }
        }

        @media (max-width: 768px) {
            .skulk {
                display: none; /* 移动端简化，实际项目中通常有汉堡菜单，此处遵循单一布局约束 */
            }
            .blaze {
                padding: 6rem 1rem 4rem;
            }
            .pelt {
                gap: 1rem;
            }
            .paw-device {
                width: 100px;
                height: 100px;
            }
            .paw-device svg {
                width: 50px;
                height: 50px;
            }
            .globe .nexus, .flare .nexus {
                grid-template-columns: 1fr;
            }
            .root .ash {
                flex-direction: column;
                text-align: center;
            }
        }