/* ===== 设计系统 ===== */
        :root {
            /* 深色主题（默认） */
            --bg-deep: #0B0F17;
            --bg-surface: #151E2C;
            --bg-surface-raised: #1E2A3A;
            --bg-surface-highlight: #2A3A4F;
            --accent-primary: #F59E0B;        /* 活力橙 */
            --accent-secondary: #6366F1;       /* 靛蓝紫 */
            --accent-gradient: linear-gradient(135deg, #F59E0B, #8B5CF6);
            --text-primary: #F3F4F6;
            --text-secondary: #CBD5E0;
            --text-tertiary: #94A3B8;
            --border-subtle: rgba(255,255,255,0.08);
            --border-strong: rgba(255,255,255,0.15);
            --shadow-card: 0 8px 20px rgba(0,0,0,0.5), 0 0 0 1px rgba(245,158,11,0.1);
            --shadow-card-hover: 0 16px 30px rgba(0,0,0,0.6), 0 0 0 1px rgba(245,158,11,0.3);
            --glow-color: rgba(245, 158, 11, 0.15);
        }

        /* 亮色主题 */
        body.light-theme {
            --bg-deep: #F8FAFC;
            --bg-surface: #FFFFFF;
            --bg-surface-raised: #F1F5F9;
            --bg-surface-highlight: #E2E8F0;
            --accent-primary: #E67E22;         /* 温暖橙 */
            --accent-secondary: #4F46E5;
            --accent-gradient: linear-gradient(135deg, #E67E22, #4F46E5);
            --text-primary: #0F172A;
            --text-secondary: #334155;
            --text-tertiary: #64748B;
            --border-subtle: rgba(0,0,0,0.06);
            --border-strong: rgba(0,0,0,0.12);
            --shadow-card: 0 8px 20px rgba(0,0,0,0.04), 0 0 0 1px rgba(230,126,34,0.2);
            --shadow-card-hover: 0 16px 30px rgba(0,0,0,0.08), 0 0 0 1px rgba(230,126,34,0.4);
            --glow-color: rgba(230, 126, 34, 0.1);
        }

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

        body {
            background: var(--bg-deep);
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            color: var(--text-primary);
            line-height: 1.6;
            transition: background-color 0.3s, color 0.2s;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 2rem;
        }

        /* ===== 装饰性背景网格 ===== */
        body::before {
            content: "";
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background-image: 
                linear-gradient(var(--border-subtle) 1px, transparent 1px),
                linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
            z-index: -1;
        }

        /* ===== 导航 ===== */
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 4rem;
            flex-wrap: wrap;
            gap: 1rem;
            position: relative;
            z-index: 10;
        }

        .logo {
            font-family: 'Space Grotesk', sans-serif;
            font-size: 1.8rem;
            font-weight: 700;
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
            position: relative;
        }
        .logo::after {
            content: "</>";
            font-family: 'JetBrains Mono', monospace;
            font-size: 1rem;
            background: var(--accent-primary);
            color: var(--bg-deep);
            padding: 0.2rem 0.6rem;
            border-radius: 40px;
            margin-left: 1rem;
            -webkit-text-fill-color: initial;
            background: var(--accent-primary);
            color: var(--bg-deep);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            font-size: 1rem;
            transition: color 0.2s;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0%;
            height: 2px;
            background: var(--accent-gradient);
            transition: width 0.2s;
        }
        .nav-links a:hover {
            color: var(--text-primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }

        /* 主题切换按钮 */
        .theme-toggle {
            background: var(--bg-surface-raised);
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.2rem;
            padding: 0.4rem 1rem;
            border-radius: 40px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            transition: 0.2s;
            box-shadow: var(--shadow-card);
        }
        .theme-toggle:hover {
            border-color: var(--accent-primary);
            transform: scale(1.05);
        }

        /* ===== Hero 区域 (重新设计) ===== */
        .hero {
            position: relative;
            background: var(--bg-surface);
            border-radius: 40px;
            padding: 3rem 3rem 2.5rem;
            margin-bottom: 5rem;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            isolation: isolate;
        }

        /* 装饰性二进制背景 */
        .hero::before {
            content: "0100 0110 0010 0110 1110 0011 0001 1101";
            font-family: 'JetBrains Mono', monospace;
            font-size: 1.2rem;
            color: var(--accent-primary);
            opacity: 0.03;
            position: absolute;
            top: 10%;
            right: 5%;
            white-space: pre;
            transform: rotate(15deg);
            pointer-events: none;
            z-index: 0;
            line-height: 2;
        }
        .hero::after {
            content: "";
            position: absolute;
            top: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
            z-index: 0;
        }

        .hero > * {
            position: relative;
            z-index: 2;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--bg-surface-raised);
            color: var(--accent-primary);
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 600;
            border: 1px solid var(--border-subtle);
            margin-bottom: 2rem;
            backdrop-filter: blur(4px);
        }
        .badge i {
            font-size: 1rem;
        }

        h1 {
            font-family: 'Space Grotesk', sans-serif;
            font-size: 4.5rem;
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: 1.2rem;
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
        }

        .tagline {
            font-size: 1.5rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            padding-left: 1.5rem;
            border-left: 4px solid var(--accent-primary);
            background: var(--bg-surface-raised);
            padding: 1.2rem 2rem;
            border-radius: 60px;
            display: inline-block;
            font-style: italic;
            box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
        }

        .platform-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 2rem;
        }

        .platform-tag {
            background: var(--bg-surface-raised);
            border: 1px solid var(--border-subtle);
            border-radius: 40px;
            padding: 0.5rem 1.3rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: 0.2s;
        }
        .platform-tag i {
            color: var(--accent-primary);
        }
        .platform-tag.highlight {
            background: rgba(245,158,11,0.15);
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            font-weight: 600;
        }
        .platform-tag:hover {
            transform: translateY(-2px);
            border-color: var(--accent-primary);
            box-shadow: 0 4px 12px rgba(245,158,11,0.2);
        }

        /* ===== 统计卡片 (徽章风格) ===== */
        .stats-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem;
            margin: 3rem 0 4rem;
        }
        .stat-item {
            flex: 1 1 180px;
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: 32px;
            padding: 2rem 1rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: 0.2s;
        }
        .stat-item:hover {
            transform: scale(1.02);
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-card-hover);
        }
        .stat-number {
            font-family: 'Space Grotesk', sans-serif;
            font-size: 2.8rem;
            font-weight: 700;
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.3rem;
            margin-top: 0.5rem;
        }

        /* ===== 卡片通用 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-bottom: 4rem;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
            margin-bottom: 4rem;
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
        }

        .card {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: 32px;
            padding: 2rem;
            box-shadow: var(--shadow-card);
            transition: all 0.2s;
            position: relative;
            overflow: hidden;
        }
        .card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 0%;
            background: var(--accent-gradient);
            transition: height 0.3s;
        }
        .card:hover {
            transform: translateY(-6px);
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-card-hover);
        }
        .card:hover::after {
            height: 100%;
        }
        .card h3 {
            font-family: 'Space Grotesk', sans-serif;
            font-size: 1.6rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            color: var(--text-primary);
        }
        .card h3 i {
            color: var(--accent-primary);
            font-size: 1.8rem;
        }

        .intro-text p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .intro-text strong {
            color: var(--accent-primary);
            font-weight: 600;
        }

        /* 技能云 */
        .skill-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .skill-item {
            font-family: 'JetBrains Mono', monospace;
            background: var(--bg-surface-raised);
            padding: 0.4rem 1.2rem;
            border-radius: 40px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            transition: 0.2s;
        }
        .skill-item:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            background: var(--bg-surface-highlight);
            transform: scale(1.05);
        }

        /* 热门标签 (彩色) */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .tag-item {
            font-family: 'JetBrains Mono', monospace;
            background: var(--bg-surface-raised);
            padding: 0.3rem 1.2rem;
            border-radius: 30px;
            font-size: 1rem;
            border: 1px solid transparent;
            transition: 0.2s;
            background: linear-gradient(145deg, var(--bg-surface-highlight), var(--bg-surface-raised));
            color: var(--text-primary);
        }
        .tag-item[data-size="lg"] { font-size: 1.3rem; padding: 0.5rem 1.5rem; }
        .tag-item[data-size="md"] { font-size: 1.1rem; }
        .tag-item[data-size="sm"] { font-size: 0.9rem; }
        .tag-item:hover {
            border-color: var(--accent-primary);
            transform: translateY(-2px) scale(1.02);
        }

        /* 文章列表 */
        .section-title {
            font-family: 'Space Grotesk', sans-serif;
            font-size: 2.2rem;
            margin: 4rem 0 2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 1rem;
            position: relative;
        }
        .section-title span {
            background: var(--accent-gradient);
            width: 8px;
            height: 40px;
            border-radius: 40px;
            display: inline-block;
        }

        .post-list {
            list-style: none;
        }
        .post-item {
            padding: 1.2rem 0;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }
        .post-item:last-child { border-bottom: none; }
        .post-title {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            transition: color 0.2s;
        }
        .post-title i {
            color: var(--accent-primary);
            opacity: 0.5;
            transition: opacity 0.2s;
        }
        .post-title:hover i {
            opacity: 1;
        }
        .post-meta {
            color: var(--text-tertiary);
            font-size: 0.9rem;
            display: flex;
            gap: 1.5rem;
        }

        /* 项目卡片 */
        .repo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .repo-card {
            background: var(--bg-surface-raised);
            border: 1px solid var(--border-subtle);
            border-radius: 24px;
            padding: 1.5rem;
            transition: 0.2s;
        }
        .repo-card:hover {
            border-color: var(--accent-primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .repo-name {
            font-weight: 600;
            color: var(--accent-primary);
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.2rem;
        }
        .repo-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

        /* 留言区 */
        .comment-item {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-subtle);
        }
        .comment-avatar {
            width: 44px;
            height: 44px;
            background: var(--bg-surface-highlight);
            border-radius: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-weight: bold;
            font-size: 1.2rem;
            border: 1px solid var(--border-subtle);
        }
        .comment-content { flex: 1; }
        .comment-author {
            font-weight: 600;
            margin-bottom: 0.3rem;
            color: var(--text-primary);
        }
        .comment-text { color: var(--text-secondary); font-size: 0.95rem; }
        .comment-time {
            color: var(--text-tertiary);
            font-size: 0.8rem;
            margin-top: 0.4rem;
        }

        /* 订阅区域 */
        .subscribe-box {
            background: var(--bg-surface);
            border-radius: 48px;
            padding: 3rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            margin: 4rem 0;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .subscribe-box::before {
            content: "</>";
            font-family: 'JetBrains Mono', monospace;
            font-size: 8rem;
            color: var(--accent-primary);
            opacity: 0.03;
            position: absolute;
            bottom: -20px;
            right: -20px;
            transform: rotate(-10deg);
        }
        .subscribe-text h4 {
            font-family: 'Space Grotesk', sans-serif;
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }
        .subscribe-text p { color: var(--text-tertiary); }
        .subscribe-action {
            display: flex;
            gap: 1.5rem;
        }
        .qrcode-placeholder {
            background: var(--bg-surface-raised);
            width: 100px;
            height: 100px;
            border-radius: 24px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: var(--accent-primary);
            font-size: 0.9rem;
            border: 1px solid var(--border-subtle);
            gap: 0.5rem;
        }
        .qrcode-placeholder i { font-size: 2rem; }

        /* 友链 */
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2.5rem;
            margin: 2rem 0;
        }
        .friend-link {
            color: var(--text-tertiary);
            text-decoration: none;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .friend-link i { color: var(--accent-primary); opacity: 0.5; }
        .friend-link:hover { color: var(--accent-primary); }
        .friend-link:hover i { opacity: 1; }

        .footer {
            margin-top: 5rem;
            padding: 2rem 0;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-tertiary);
            flex-wrap: wrap;
            gap: 1rem;
        }
        .social-links {
            display: flex;
            gap: 1.5rem;
        }
        .social-links a {
            color: var(--text-tertiary);
            font-size: 1.3rem;
            transition: 0.2s;
        }
        .social-links a:hover {
            color: var(--accent-primary);
            transform: translateY(-2px);
        }
        .wechat {
            background: var(--bg-surface-raised);
            padding: 0.4rem 1.2rem;
            border-radius: 40px;
            border: 1px solid var(--border-subtle);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }