/* ============================================
           Design Tokens — Aurora Glass 风格
           深午夜底 + 流动极光 + 毛玻璃卡片
           ============================================ */
        :root {
            /* 基底 - 深午夜蓝 */
            --bg-base: #08081A;
            --bg-deep: #050514;
            --bg-surface: rgba(16, 16, 36, 0.6);
            --bg-glass: rgba(255, 255, 255, 0.04);
            --bg-glass-hover: rgba(255, 255, 255, 0.07);

            /* 文字 */
            --text-1: #F0F0FF;
            --text-2: #A8A8C8;
            --text-3: #6B6B8A;

            /* 极光色系 */
            --aurora-1: #00D4FF;   /* 电光蓝 */
            --aurora-2: #7B61FF;   /* 干涉紫 */
            --aurora-3: #FF006E;   /* 品红 */
            --aurora-4: #00FFA3;   /* 荧光绿 */
            --aurora-5: #FFB800;   /* 金黄 */

            /* 品牌 - 取极光主色 */
            --brand: #7B61FF;
            --brand-light: #9D8AFF;
            --brand-glow: rgba(123, 97, 255, 0.4);

            /* 边框 */
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glass-hover: rgba(255, 255, 255, 0.15);
            --border-brand: rgba(123, 97, 255, 0.3);

            /* 品类色 */
            --c-doc: #3B82F6;
            --c-img: #A855F7;
            --c-classics: #F59E0B;
            --c-dev: #10B981;
            --c-daily: #F97316;
            --c-convert: #EC4899;

            /* 渐变 */
            --grad-aurora: linear-gradient(135deg, #00D4FF 0%, #7B61FF 35%, #FF006E 70%, #00FFA3 100%);
            --grad-text: linear-gradient(135deg, #00D4FF 0%, #7B61FF 50%, #FF006E 100%);
            --grad-glass: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.02) 100%);

            /* 阴影 */
            --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glass-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(123, 97, 255, 0.15);
            --shadow-glow-strong: 0 0 60px rgba(123, 97, 255, 0.3);

            /* 圆角 */
            --r-sm: 10px;
            --r-md: 14px;
            --r-lg: 20px;
            --r-xl: 28px;
            --r-full: 9999px;

            /* 字体 */
            --ff-display: 'Outfit', sans-serif;
            --ff-body: 'Work Sans', sans-serif;
            --ff-mono: 'JetBrains Mono', monospace;

            /* 动效 */
            --ease: cubic-bezier(0.4, 0, 0.2, 1);
            --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; height: 100%; }
        body { font-family: var(--ff-body); background: var(--bg-deep); color: var(--text-1); line-height: 1.6; overflow-x: hidden; min-height: 100vh; min-height: 100dvh; position: relative; display: flex; flex-direction: column; padding-bottom: 100px; }
        .site-main { flex: 1 0 auto; }
        .footer { position: fixed; bottom: 0; left: 0; right: 0; z-index: 99; }
        a { color: inherit; text-decoration: none; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }

        /* ============================================
           Aurora Background - 核心视觉
           ============================================ */
        .aurora-bg { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -3; background: var(--bg-deep); overflow: hidden; }

        .aurora-blob { position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.35; mix-blend-mode: screen; }
        .aurora-blob-1 { width: 600px; height: 600px; background: radial-gradient(circle, #00D4FF, transparent 65%); top: -200px; left: -150px; animation: auroraMove1 18s ease-in-out infinite; }
        .aurora-blob-2 { width: 500px; height: 500px; background: radial-gradient(circle, #7B61FF, transparent 65%); top: 20%; right: -100px; animation: auroraMove2 22s ease-in-out infinite; }
        .aurora-blob-3 { width: 450px; height: 450px; background: radial-gradient(circle, #FF006E, transparent 65%); bottom: -100px; left: 30%; animation: auroraMove3 25s ease-in-out infinite; }
        .aurora-blob-4 { width: 400px; height: 400px; background: radial-gradient(circle, #00FFA3, transparent 65%); top: 50%; left: 60%; animation: auroraMove4 20s ease-in-out infinite; opacity: 0.2; }

        @keyframes auroraMove1 { 0%,100% { transform: translate(0,0) scale(1); } 33% { transform: translate(100px, 60px) scale(1.15); } 66% { transform: translate(-50px, 120px) scale(0.9); } }
        @keyframes auroraMove2 { 0%,100% { transform: translate(0,0) scale(1); } 33% { transform: translate(-80px, 100px) scale(1.1); } 66% { transform: translate(60px, -50px) scale(0.95); } }
        @keyframes auroraMove3 { 0%,100% { transform: translate(0,0) scale(1); } 33% { transform: translate(120px, -80px) scale(1.2); } 66% { transform: translate(-60px, -40px) scale(0.85); } }
        @keyframes auroraMove4 { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-100px, -60px) scale(1.3); } }

        /* Noise texture overlay */
        .aurora-bg::after { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E"); opacity: 0.03; pointer-events: none; }

        /* ============================================
           Light Effects - 光线效果增强
           ============================================ */

        /* 1. Light Beams - 顶部斜射光柱 */
        .light-beams { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; z-index: -2; pointer-events: none; overflow: hidden; }
        .beam { position: absolute; top: -20%; width: 2px; height: 140%; filter: blur(1px); transform-origin: top center; animation: beamSway 8s ease-in-out infinite; }
        .beam-1 { left: 15%; background: linear-gradient(to bottom, transparent, rgba(0,212,255,0.12) 40%, rgba(0,212,255,0.12) 60%, transparent); --r: 15deg; transform: rotate(15deg); animation-delay: 0s; }
        .beam-2 { left: 35%; background: linear-gradient(to bottom, transparent, rgba(123,97,255,0.1) 40%, rgba(123,97,255,0.1) 60%, transparent); --r: 12deg; transform: rotate(12deg); animation-delay: -2s; }
        .beam-3 { left: 55%; background: linear-gradient(to bottom, transparent, rgba(255,0,110,0.08) 40%, rgba(255,0,110,0.08) 60%, transparent); --r: 18deg; transform: rotate(18deg); animation-delay: -4s; }
        .beam-4 { left: 75%; background: linear-gradient(to bottom, transparent, rgba(0,255,163,0.06) 40%, rgba(0,255,163,0.06) 60%, transparent); --r: 10deg; transform: rotate(10deg); animation-delay: -6s; }
        .beam-5 { left: 85%; background: linear-gradient(to bottom, transparent, rgba(123,97,255,0.08) 40%, rgba(123,97,255,0.08) 60%, transparent); --r: 14deg; transform: rotate(14deg); animation-delay: -3s; }
        @keyframes beamSway { 0%,100% { opacity: 0.3; transform: rotate(var(--r,15deg)) translateX(0); } 50% { opacity: 0.8; transform: rotate(calc(var(--r,15deg) + 3deg)) translateX(20px); } }

        /* 2. Mouse-follow Glow */
        .mouse-glow { position: fixed; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(123,97,255,0.06) 0%, rgba(0,212,255,0.03) 30%, transparent 60%); pointer-events: none; z-index: -1; transform: translate(-50%,-50%); transition: opacity 300ms; opacity: 0; mix-blend-mode: screen; }

        /* 3. Floating Particles */
        .particles { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; overflow: hidden; }
        .particle { position: absolute; width: 3px; height: 3px; border-radius: 50%; animation: floatUp var(--p-duration, 15s) linear infinite; opacity: 0; }
        @keyframes floatUp { 0% { transform: translateY(100vh) translateX(0); opacity: 0; } 10% { opacity: var(--p-opacity, 0.6); } 90% { opacity: var(--p-opacity, 0.6); } 100% { transform: translateY(-10vh) translateX(var(--p-drift, 30px)); opacity: 0; } }

        /* 4. Card Light Sweep */
        .tool-card::after { content: ''; position: absolute; top: 0; left: -100%; width: 60%; height: 100%; background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,0.06) 48%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.06) 52%, transparent 70%); transition: left 600ms var(--ease); pointer-events: none; z-index: 1; }
        .tool-card:hover::after { left: 150%; }

        /* 5. Button Pulse Ring */
        .pulse-ring { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 100%; height: 100%; border-radius: inherit; border: 2px solid var(--brand); opacity: 0; animation: pulseRing 2.5s ease-out infinite; pointer-events: none; }
        @keyframes pulseRing { 0% { width: 100%; height: 100%; opacity: 0.4; } 100% { width: 160%; height: 160%; opacity: 0; } }

        /* 6. Search box inner glow */
        .hero-search-box::after { content: ''; position: absolute; inset: 0; border-radius: var(--r-full); background: radial-gradient(ellipse at center, rgba(123,97,255,0.08) 0%, transparent 70%); opacity: 0; transition: opacity 400ms var(--ease); pointer-events: none; }
        .hero-search-box:focus-within::after { opacity: 1; }

        /* 7. Hero title glow */
        .hero-title-grad { filter: drop-shadow(0 0 30px rgba(123,97,255,0.15)); }

        /* 8. Section divider light line */
        .light-divider { height: 1px; background: linear-gradient(90deg, transparent, rgba(123,97,255,0.2) 20%, rgba(0,212,255,0.2) 50%, rgba(255,0,110,0.15) 80%, transparent); margin: 0 auto; max-width: 800px; }

        /* 9. Tool icon glow on hover */
        .tool-card[data-cat="doc"] .tool-icon { transition: box-shadow 400ms; }
        .tool-card[data-cat="doc"]:hover .tool-icon { box-shadow: 0 0 20px rgba(59,130,246,0.3); }
        .tool-card[data-cat="img"] .tool-icon { transition: box-shadow 400ms; }
        .tool-card[data-cat="img"]:hover .tool-icon { box-shadow: 0 0 20px rgba(168,85,247,0.3); }
        .tool-card[data-cat="classics"] .tool-icon { transition: box-shadow 400ms; }
        .tool-card[data-cat="classics"]:hover .tool-icon { box-shadow: 0 0 20px rgba(245,158,11,0.3); }
        .tool-card[data-cat="dev"] .tool-icon { transition: box-shadow 400ms; }
        .tool-card[data-cat="dev"]:hover .tool-icon { box-shadow: 0 0 20px rgba(16,185,129,0.3); }
        .tool-card[data-cat="daily"] .tool-icon { transition: box-shadow 400ms; }
        .tool-card[data-cat="daily"]:hover .tool-icon { box-shadow: 0 0 20px rgba(249,115,22,0.3); }
        .tool-card[data-cat="convert"] .tool-icon { transition: box-shadow 400ms; }
        .tool-card[data-cat="convert"]:hover .tool-icon { box-shadow: 0 0 20px rgba(236,72,153,0.3); }

        /* ============================================
           Navigation - 毛玻璃
           ============================================ */
        .nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 16px 48px; display: flex; align-items: center; justify-content: space-between; backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%); background: rgba(8, 8, 26, 0.6); border-bottom: 1px solid var(--border-glass); transition: all 300ms var(--ease); }
        .nav.scrolled { padding: 10px 48px; background: rgba(8, 8, 26, 0.8); }

        .nav-logo { display: flex; align-items: center; gap: 10px; font-family: var(--ff-display); font-weight: 700; font-size: 1.15rem; }
        .nav-logo-img { width: 38px; height: 38px; border-radius: 11px; object-fit: contain; background: rgba(255,255,255,0.08); border: 1px solid var(--border-glass); box-shadow: 0 0 20px rgba(123, 97, 255, 0.4); transition: transform 400ms var(--ease-bounce); }
        .nav-logo:hover .nav-logo-img { transform: rotate(-8deg) scale(1.08); }

        .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
        .nav-links a { font-size: 0.875rem; font-weight: 500; color: var(--text-2); transition: color 200ms; }
        .nav-links a:hover { color: var(--brand-light); }

        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .nav-search-btn { display: flex; align-items: center; gap: 8px; padding: 8px 16px; border-radius: var(--r-full); background: var(--bg-glass); border: 1px solid var(--border-glass); font-size: 0.8rem; color: var(--text-3); transition: all 200ms; }
        .nav-search-btn:hover { border-color: var(--border-brand); color: var(--brand-light); }
        .nav-search-btn kbd { font-family: var(--ff-mono); font-size: 0.65rem; padding: 2px 6px; border-radius: 4px; background: rgba(255,255,255,0.06); border: 1px solid var(--border-glass); }
        .nav-cta { padding: 8px 20px; border-radius: var(--r-full); font-size: 0.85rem; font-weight: 600; color: #fff; background: var(--grad-aurora); box-shadow: 0 4px 20px rgba(123, 97, 255, 0.3); transition: all 200ms; }
        .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 28px rgba(123, 97, 255, 0.5); }

        .nav-burger { display: none; flex-direction: column; gap: 5px; padding: 10px; cursor: pointer; background: none; border: none; }
        .nav-burger span { width: 22px; height: 2px; background: var(--text-1); border-radius: 2px; display: block; }

        /* ============================================
           Hero
           ============================================ */
        .hero { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 120px 48px 80px; position: relative; }
        .hero-inner { max-width: 820px; width: 100%; text-align: center; }

        .hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 18px; border-radius: var(--r-full); background: var(--bg-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--border-glass); font-size: 0.78rem; font-weight: 500; color: var(--text-2); margin-bottom: 28px; animation: fadeUp 0.6s var(--ease) forwards; opacity: 0; }
        .hero-badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--aurora-4); box-shadow: 0 0 8px var(--aurora-4); animation: pulse 2s ease-in-out infinite; }
        @keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

        .hero-title { font-family: var(--ff-display); font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; line-height: 1.08; letter-spacing: -0.03em; margin-bottom: 24px; animation: fadeUp 0.6s var(--ease) 0.1s forwards; opacity: 0; }
        .hero-title-grad { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; display: inline-block; }

        .hero-desc { font-size: 1.1rem; color: var(--text-2); line-height: 1.7; max-width: 560px; margin: 0 auto 40px; animation: fadeUp 0.6s var(--ease) 0.2s forwards; opacity: 0; }

        /* Hero Search - 毛玻璃 */
        .hero-search-wrap { max-width: 580px; margin: 0 auto; position: relative; z-index: 100; animation: fadeUp 0.6s var(--ease) 0.3s forwards; opacity: 0; }
        .hero-search-box { display: flex; align-items: center; padding: 4px 4px 4px 20px; border-radius: var(--r-full); background: rgba(16, 16, 36, 0.5); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border: 1px solid var(--border-glass); box-shadow: var(--shadow-glass); transition: all 300ms var(--ease); }
        .hero-search-box:focus-within { border-color: var(--border-brand); box-shadow: 0 0 0 4px rgba(123, 97, 255, 0.08), var(--shadow-glass); }
        .hero-search-icon { color: var(--text-3); flex-shrink: 0; }
        .hero-search-input { flex: 1; border: none; outline: none; background: none; font-family: var(--ff-body); font-size: 0.95rem; color: var(--text-1); padding: 12px 8px; }
        .hero-search-input::placeholder { color: var(--text-3); }
        .hero-search-go { padding: 10px 24px; border-radius: var(--r-full); font-size: 0.85rem; font-weight: 600; color: #fff; background: var(--grad-aurora); transition: all 200ms; flex-shrink: 0; }
        .hero-search-go:hover { transform: scale(1.03); box-shadow: 0 4px 16px rgba(123, 97, 255, 0.4); }

        .search-dropdown { position: absolute; top: calc(100% + 10px); left: 0; right: 0; border-radius: var(--r-lg); background: rgba(10, 10, 28, 0.96); backdrop-filter: blur(28px); -webkit-backdrop-filter: blur(28px); border: 1px solid rgba(123, 97, 255, 0.25); box-shadow: 0 12px 48px rgba(0,0,0,0.5), 0 0 0 1px rgba(123,97,255,0.1); max-height: 420px; overflow-y: auto; display: none; z-index: 200; text-align: left; }
        .search-dropdown.visible { display: block; animation: fadeDown 0.2s var(--ease); }
        .search-item { display: flex; align-items: center; gap: 14px; padding: 14px 22px; cursor: pointer; transition: all 150ms; border-bottom: 1px solid rgba(123, 97, 255, 0.08); }
        .search-item:last-child { border-bottom: none; }
        .search-item:hover { background: rgba(123, 97, 255, 0.12); border-bottom-color: rgba(123, 97, 255, 0.2); }
        .search-item-icon { width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .search-item-info { flex: 1; }
        .search-item-name { font-size: 0.9rem; font-weight: 600; color: #fff; text-shadow: 0 0 8px rgba(123,97,255,0.15); }
        .search-item-desc { font-size: 0.78rem; color: rgba(200, 205, 230, 0.85); margin-top: 3px; }
        .search-item-cat { font-family: var(--ff-mono); font-size: 0.65rem; padding: 2px 8px; border-radius: var(--r-full); }

        /* Hero Compact — 工具首页搜索区 */
        .hero--compact { min-height: auto; padding: 140px 48px 64px; }
        .hero--compact .hero-inner { max-width: 720px; }
        .hero--compact .hero-title { font-size: clamp(1.9rem, 4.5vw, 3rem); margin-bottom: 16px; }
        .hero--compact .hero-desc { font-size: 1rem; margin-bottom: 28px; }

        @media (max-width: 768px) {
            .hero--compact { padding: 120px 24px 48px; }
        }

        /* ============================================
           Tools Section
           ============================================ */
        .tools-section { max-width: 1280px; margin: 0 auto; padding: 80px 0px; box-sizing: border-box; }
        .section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 32px; gap: 24px; flex-wrap: wrap; }
        .section-head-left { flex: 1; min-width: 280px; }
        .section-eyebrow { font-family: var(--ff-mono); font-size: 0.72rem; font-weight: 500; color: var(--brand-light); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 8px; }
        .section-title { font-family: var(--ff-display); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.02em; }
        .section-sub { font-size: 0.9rem; color: var(--text-2); margin-top: 4px; }

        /* Category Filter */
        .cat-filter { display: flex; gap: 8px; flex-wrap: wrap; }
        .cat-pill { display: flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--r-full); font-size: 0.82rem; font-weight: 500; color: var(--text-2); background: var(--bg-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--border-glass); transition: all 200ms; cursor: pointer; white-space: nowrap; }
        .cat-pill:hover { border-color: var(--border-glass-hover); color: var(--text-1); background: var(--bg-glass-hover); }
        .cat-pill.active { color: #fff; border-color: transparent; }
        .cat-pill-dot { width: 7px; height: 7px; border-radius: 50%; }
        .cat-pill-count { font-family: var(--ff-mono); font-size: 0.68rem; opacity: 0.6; }
        .cat-pill.active .cat-pill-count { opacity: 0.8; }

        .cat-pill[data-cat="doc"].active { background: rgba(59, 130, 246, 0.2); border-color: rgba(59, 130, 246, 0.3); }
        .cat-pill[data-cat="img"].active { background: rgba(168, 85, 247, 0.2); border-color: rgba(168, 85, 247, 0.3); }
        .cat-pill[data-cat="classics"].active { background: rgba(245, 158, 11, 0.2); border-color: rgba(245, 158, 11, 0.3); }
        .cat-pill[data-cat="dev"].active { background: rgba(16, 185, 129, 0.2); border-color: rgba(16, 185, 129, 0.3); }
        .cat-pill[data-cat="daily"].active { background: rgba(249, 115, 22, 0.2); border-color: rgba(249, 115, 22, 0.3); }
        .cat-pill[data-cat="convert"].active { background: rgba(236, 72, 153, 0.2); border-color: rgba(236, 72, 153, 0.3); }

        /* Tools Layout — 左侧大类导航 + 右侧小类/工具 */
        .tools-layout { display: grid; grid-template-columns: 300px 1fr; gap: 32px; align-items: start; }
        .cat-sidebar { position: sticky; top: 90px; }
        .cat-sidebar-title { font-family: var(--ff-display); font-size: 0.85rem; font-weight: 600; color: var(--text-1); margin-bottom: 16px; padding-left: 12px; letter-spacing: 0.02em; }
        .cat-sidebar-list { display: flex; flex-direction: column; gap: 8px; }
        .cat-sidebar-item { display: flex; align-items: center; gap: 16px; width: 100%; padding: 14px 16px; border-radius: var(--r-lg); font-size: 1rem; font-weight: 600; color: var(--text-2); background: var(--bg-glass); border: 1px solid var(--border-glass); cursor: pointer; transition: all 200ms var(--ease); text-align: left; box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
        .cat-sidebar-item:hover { background: var(--bg-glass-hover); border-color: var(--border-glass-hover); color: var(--text-1); transform: translateY(-2px); box-shadow: 0 10px 28px -10px rgba(0,0,0,0.35); }
        .cat-sidebar-item.active { color: #fff; background: rgba(123, 97, 255, 0.18); border-color: var(--border-brand); box-shadow: 0 0 28px -4px rgba(123,97,255,0.4); }
        .cat-sidebar-item .cat-pill-dot { width: 44px; height: 44px; border-radius: 14px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; font-size: 1.35rem; line-height: 1; box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
        .cat-sidebar-item .cat-pill-dot::before { font-size: 1.35rem; }
        .cat-sidebar-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        .cat-sidebar-count { font-family: var(--ff-mono); font-size: 0.75rem; font-weight: 600; color: var(--text-2); background: rgba(255,255,255,0.08); padding: 3px 9px; border-radius: var(--r-full); flex-shrink: 0; min-width: 24px; text-align: center; }
        .cat-sidebar-item.active .cat-sidebar-count { color: #fff; background: rgba(255,255,255,0.18); }

        /* 分类 emoji 配图 */
        .cat-sidebar-item[data-cat="doc"] .cat-pill-dot::before { content: "📄"; }
        .cat-sidebar-item[data-cat="img"] .cat-pill-dot::before { content: "🖼️"; }
        .cat-sidebar-item[data-cat="classics"] .cat-pill-dot::before { content: "🎮"; }
        .cat-sidebar-item[data-cat="dev"] .cat-pill-dot::before { content: "💻"; }
        .cat-sidebar-item[data-cat="daily"] .cat-pill-dot::before { content: "🛠️"; }
        .cat-sidebar-item[data-cat="convert"] .cat-pill-dot::before { content: "🔄"; }
        .cat-sidebar-item[data-cat="media"] .cat-pill-dot::before { content: "🎬"; }
        .cat-sidebar-item[data-cat="calc"] .cat-pill-dot::before { content: "🧮"; }
        .cat-sidebar-item[data-cat="ai"] .cat-pill-dot::before { content: "🤖"; }
        .cat-sidebar-item[data-cat="life"] .cat-pill-dot::before { content: "🏠"; }
        .cat-sidebar-item[data-cat="pro"] .cat-pill-dot::before { content: "🏢"; }

        .cat-sidebar-item[data-cat="doc"].active { background: rgba(59, 130, 246, 0.18); border-color: rgba(59, 130, 246, 0.4); }
        .cat-sidebar-item[data-cat="img"].active { background: rgba(168, 85, 247, 0.18); border-color: rgba(168, 85, 247, 0.4); }
        .cat-sidebar-item[data-cat="classics"].active { background: rgba(245, 158, 11, 0.18); border-color: rgba(245, 158, 11, 0.4); }
        .cat-sidebar-item[data-cat="dev"].active { background: rgba(16, 185, 129, 0.18); border-color: rgba(16, 185, 129, 0.4); }
        .cat-sidebar-item[data-cat="daily"].active { background: rgba(249, 115, 22, 0.18); border-color: rgba(249, 115, 22, 0.4); }
        .cat-sidebar-item[data-cat="convert"].active { background: rgba(236, 72, 153, 0.18); border-color: rgba(236, 72, 153, 0.4); }
        .cat-sidebar-item[data-cat="media"].active { background: rgba(236, 72, 153, 0.18); border-color: rgba(236, 72, 153, 0.4); }
        .cat-sidebar-item[data-cat="calc"].active { background: rgba(245, 158, 11, 0.18); border-color: rgba(245, 158, 11, 0.4); }
        .cat-sidebar-item[data-cat="ai"].active { background: rgba(139, 92, 246, 0.18); border-color: rgba(139, 92, 246, 0.4); }
        .cat-sidebar-item[data-cat="life"].active { background: rgba(249, 115, 22, 0.18); border-color: rgba(249, 115, 22, 0.4); }
        .cat-sidebar-item[data-cat="pro"].active { background: rgba(6, 182, 212, 0.18); border-color: rgba(6, 182, 212, 0.4); }

        .cat-content { min-width: 0; }

        /* Tool Grid - 毛玻璃卡片 */
        .tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; grid-auto-rows: 1fr; align-items: stretch; position: relative; min-height: 520px; }

        /* Loading overlay - keeps grid height stable while switching categories */
        .tool-grid.is-loading::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(8, 8, 26, 0.45);
            backdrop-filter: blur(2px);
            -webkit-backdrop-filter: blur(2px);
            border-radius: var(--r-lg);
            z-index: 10;
        }
        .tool-grid.is-loading::before {
            content: '';
            position: absolute;
            top: 120px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            border: 2px solid var(--border-glass);
            border-top-color: var(--brand);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            z-index: 11;
        }

        .tool-grid .tool-card { border-radius: var(--r-lg); background: var(--bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border: 1px solid var(--border-glass); padding: 24px; cursor: pointer; position: relative; overflow: hidden; transition: all 300ms var(--ease); display: flex; flex-direction: column; min-height: 230px; height: 100%; box-sizing: border-box; }
        .tool-grid .tool-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; border-radius: var(--r-lg); padding: 1px; background: var(--grad-aurora); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity 300ms; pointer-events: none; }
        .tool-grid .tool-card:hover { background: var(--bg-glass-hover); transform: translateY(-4px); box-shadow: var(--shadow-glass-lg), var(--shadow-glow); }
        .tool-grid .tool-card:hover::before { opacity: 0.4; }

        .tool-grid .tool-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; flex-shrink: 0; }
        .tool-grid .tool-icon { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: transform 400ms var(--ease-bounce); }
        .tool-grid .tool-card:hover .tool-icon { transform: scale(1.12) rotate(-6deg); }

        .tool-grid .tool-card[data-cat="doc"] .tool-icon { background: rgba(59, 130, 246, 0.15); color: #60A5FA; }
        .tool-grid .tool-card[data-cat="img"] .tool-icon { background: rgba(168, 85, 247, 0.15); color: #C084FC; }
        .tool-grid .tool-card[data-cat="classics"] .tool-icon { background: rgba(245, 158, 11, 0.15); color: #FBBF24; font-family: 'Noto Serif SC', serif; font-weight: 700; }
        .tool-grid .tool-card[data-cat="dev"] .tool-icon { background: rgba(16, 185, 129, 0.15); color: #34D399; }
        .tool-grid .tool-card[data-cat="daily"] .tool-icon { background: rgba(249, 115, 22, 0.15); color: #FB923C; }
        .tool-grid .tool-card[data-cat="convert"] .tool-icon { background: rgba(236, 72, 153, 0.15); color: #F472B6; }

        .tool-badge { font-family: var(--ff-mono); font-size: 0.6rem; padding: 2px 8px; border-radius: var(--r-full); font-weight: 600; flex-shrink: 0; }
        .tool-badge.live { background: rgba(16, 185, 129, 0.15); color: #34D399; }
        .tool-badge.new { background: rgba(123, 97, 255, 0.15); color: var(--brand-light); }
        .tool-badge.soon { background: rgba(255, 255, 255, 0.06); color: var(--text-3); }

        .tool-grid .tool-card-body { flex: 1; display: flex; flex-direction: column; min-height: 0; }
        .tool-grid .tool-card-name { font-family: var(--ff-display); font-weight: 600; font-size: 1rem; color: var(--text-1); margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .tool-grid .tool-card-desc { font-size: 0.8rem; color: var(--text-2); line-height: 1.5; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2; overflow: hidden; min-height: 2.4em; flex-shrink: 0; }
        .tool-grid .tool-card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 12px; flex-shrink: 0; }
        .tool-cat-tag { font-family: var(--ff-mono); font-size: 0.65rem; padding: 3px 10px; border-radius: var(--r-full); }

        .tool-grid .tool-card[data-cat="doc"] .tool-cat-tag { background: rgba(59, 130, 246, 0.12); color: #60A5FA; }
        .tool-grid .tool-card[data-cat="img"] .tool-cat-tag { background: rgba(168, 85, 247, 0.12); color: #C084FC; }
        .tool-grid .tool-card[data-cat="classics"] .tool-cat-tag { background: rgba(245, 158, 11, 0.12); color: #FBBF24; }
        .tool-grid .tool-card[data-cat="dev"] .tool-cat-tag { background: rgba(16, 185, 129, 0.12); color: #34D399; }
        .tool-grid .tool-card[data-cat="daily"] .tool-cat-tag { background: rgba(249, 115, 22, 0.12); color: #FB923C; }
        .tool-grid .tool-card[data-cat="convert"] .tool-cat-tag { background: rgba(236, 72, 153, 0.12); color: #F472B6; }

        .tool-grid .tool-arrow { color: var(--text-3); transition: all 300ms var(--ease); }
        .tool-grid .tool-card:hover .tool-arrow { color: var(--brand-light); transform: translateX(4px); }

        /* ============================================
           Features
           ============================================ */
        .features { max-width: 1280px; margin: 0 auto; padding: 0 0px 80px; }
        .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
        .feature-card { padding: 28px; border-radius: var(--r-lg); background: var(--bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border: 1px solid var(--border-glass); transition: all 300ms; }
        .feature-card:hover { background: var(--bg-glass-hover); transform: translateY(-2px); box-shadow: var(--shadow-glass); }
        .feature-icon { width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
        .feature-card h4 { font-family: var(--ff-display); font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
        .feature-card p { font-size: 0.8rem; color: var(--text-2); line-height: 1.5; }

        /* ============================================
           Home Articles - 最新文章 & 热门阅读
           ============================================ */
        .home-articles-section { max-width: 1280px; margin: 0 auto; padding: 40px 0px; }
        .home-articles-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
        .home-articles-col { min-width: 0; }
        .home-articles-col .section-head { margin-bottom: 16px; }
        .section-more { display: inline-flex; align-items: center; gap: 4px; font-size: 0.82rem; color: var(--text-3); text-decoration: none; transition: color 200ms; white-space: nowrap; }
        .section-more:hover { color: var(--brand-light); }
        .section-more svg { transition: transform 200ms; }
        .section-more:hover svg { transform: translateX(3px); }
        .home-article-list { display: flex; flex-direction: column; }
        .home-article-item { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.04); text-decoration: none; transition: all 200ms; }
        .home-article-item:last-child { border-bottom: none; }
        .home-article-item:hover { padding-left: 4px; }
        .home-article-item:hover .home-article-title { color: var(--brand-light); }
        .home-article-num { font-family: var(--ff-mono); font-size: 0.82rem; color: var(--text-4); flex-shrink: 0; min-width: 26px; }
        .home-article-num.hot { color: var(--brand-light); font-weight: 600; }
        .home-article-title { flex: 1; font-size: 0.88rem; color: var(--text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color 200ms; }
        .home-article-date { font-family: var(--ff-mono); font-size: 0.75rem; color: var(--text-4); flex-shrink: 0; }
        .home-article-views { font-family: var(--ff-mono); font-size: 0.75rem; color: var(--text-4); flex-shrink: 0; white-space: nowrap; }
        .home-article-empty { color: var(--text-4); font-size: 0.85rem; padding: 20px 0; }

        /* ============================================
           CTA
           ============================================ */
        .cta-section { max-width: 1280px; margin: 0 auto; padding: 0 0px 60px; }
        .cta-card { padding: 56px 48px; border-radius: var(--r-xl); background: rgba(16, 16, 36, 0.5); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border: 1px solid var(--border-glass); position: relative; overflow: hidden; text-align: center; box-shadow: var(--shadow-glow); }
        .cta-card-glow { position: absolute; top: -60%; left: 50%; transform: translateX(-50%); width: 700px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(123,97,255,0.12), transparent 60%); pointer-events: none; }
        .cta-title { font-family: var(--ff-display); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; margin-bottom: 8px; position: relative; }
        .cta-desc { font-size: 0.95rem; color: var(--text-2); margin-bottom: 28px; position: relative; }
        .cta-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--r-full); font-size: 0.9rem; font-weight: 600; color: #fff; background: var(--grad-aurora); transition: all 200ms; position: relative; }
        .cta-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(123, 97, 255, 0.4); }

        /* ============================================
           Footer
           ============================================ */
        .footer { border-top: 1px solid var(--border-glass); padding: 32px 48px; background: var(--bg-deep); }
        .footer-inner { max-width: 1280px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
        .footer-brand { font-size: 0.85rem; color: var(--text-3); }
        .footer-brand span { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; font-weight: 600; }
        .footer-links { display: flex; gap: 24px; list-style: none; }
        .footer-links a { font-size: 0.82rem; color: var(--text-2); transition: color 200ms; }
        .footer-links a:hover { color: var(--brand-light); }

        /* ============================================
           Friend Links
           ============================================ */
        .friend-links-section { max-width: 1280px; margin: 0 auto; }
        .friend-links-inner { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 20px;  -webkit-backdrop-filter: blur(12px); }
        .friend-links-label { font-size: 0.8rem; color: var(--text-3); font-weight: 600; white-space: nowrap; text-transform: uppercase; letter-spacing: 0.05em; }
        .friend-links-list { display: flex; flex-wrap: wrap; gap: 10px 20px; list-style: none; }
        .friend-links-list li a { font-size: 0.85rem; color: var(--text-2); transition: color 200ms; }
        .friend-links-list li a:hover { color: var(--brand-light); }
        @media (max-width: 640px) {
            .friend-links-section { padding: 0 16px 16px; }
            .friend-links-inner { padding: 14px 16px; }
        }

        /* ============================================
           Animations
           ============================================ */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes fadeDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
        .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }
        .reveal.visible { opacity: 1; transform: translateY(0); }

        /* ============================================
           Responsive
           ============================================ */
        @media (max-width: 1024px) {
            .tools-layout { grid-template-columns: 1fr; gap: 24px; }
            .cat-sidebar { position: static; top: auto; }
            .cat-sidebar-title { display: none; }
            .cat-sidebar-list { flex-direction: row; overflow-x: auto; gap: 8px; padding-bottom: 8px; scrollbar-width: thin; }
            .cat-sidebar-list::-webkit-scrollbar { height: 4px; }
            .cat-sidebar-list::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 4px; }
            .cat-sidebar-item { width: auto; white-space: nowrap; flex-shrink: 0; padding: 12px 14px; font-size: 0.9rem; }
            .cat-sidebar-item .cat-pill-dot { width: 36px; height: 36px; border-radius: 12px; font-size: 1.1rem; }
        }
        @media (max-width: 768px) {
            .nav { padding: 12px 24px; }
            .nav-links {
                display: none;
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(15, 15, 30, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 20px 24px;
                gap: 16px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
                z-index: 99;
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links a {
                font-size: 1rem;
                padding: 8px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .nav-links a:last-child {
                border-bottom: none;
            }
            .nav-search-btn { display: none; }
            .nav-cta { display: none; }
            .nav-burger { display: flex; }
            .nav-burger.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }
            .nav-burger.active span:nth-child(2) {
                opacity: 0;
            }
            .nav-burger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -7px);
            }
            .nav-burger span {
                transition: transform 300ms, opacity 200ms;
            }
            .hero { padding: 120px 24px 60px; }
            .tools-section, .features, .cta-section { padding-left: 24px; padding-right: 24px; }
            .home-articles-section { padding: 40px 24px; }
            .home-articles-grid { grid-template-columns: 1fr; gap: 32px; }
            .features-grid { grid-template-columns: 1fr 1fr; }
            .section-head { flex-direction: column; align-items: flex-start; }
            .cta-card { padding: 36px 24px; }
            .footer-inner { flex-direction: column; text-align: center; }
        }
        @media (max-width: 1024px) {
            .tool-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .tool-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
        }
        /* ============================================
           Matrix Digital Rain - 黑客帝国数字雨
           ============================================ */
        #matrixCanvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -2; pointer-events: none; opacity: 0.35; mix-blend-mode: screen; }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
            .aurora-blob { animation: none !important; }
            .beam, .particle, .pulse-ring { display: none !important; }
            .mouse-glow { display: none !important; }
            #matrixCanvas { display: none !important; }
        }
    

        /* ============================================
           8-Category Color Extensions
           ============================================ */
        .cat-pill[data-cat="media"].active { background: rgba(236, 72, 153, 0.2); border-color: rgba(236, 72, 153, 0.3); }
        .cat-pill[data-cat="calc"].active { background: rgba(245, 158, 11, 0.2); border-color: rgba(245, 158, 11, 0.3); }
        .cat-pill[data-cat="ai"].active { background: rgba(139, 92, 246, 0.2); border-color: rgba(139, 92, 246, 0.3); }
        .cat-pill[data-cat="life"].active { background: rgba(249, 115, 22, 0.2); border-color: rgba(249, 115, 22, 0.3); }
        .cat-pill[data-cat="pro"].active { background: rgba(6, 182, 212, 0.2); border-color: rgba(6, 182, 212, 0.3); }

        .tool-card[data-cat="media"] .tool-icon { background: rgba(236, 72, 153, 0.15); color: #F472B6; transition: box-shadow 400ms; }
        .tool-card[data-cat="media"]:hover .tool-icon { box-shadow: 0 0 20px rgba(236,72,153,0.3); }
        .tool-card[data-cat="media"] .tool-cat-tag { background: rgba(236, 72, 153, 0.12); color: #F472B6; }

        .tool-card[data-cat="calc"] .tool-icon { background: rgba(245, 158, 11, 0.15); color: #FBBF24; transition: box-shadow 400ms; }
        .tool-card[data-cat="calc"]:hover .tool-icon { box-shadow: 0 0 20px rgba(245,158,11,0.3); }
        .tool-card[data-cat="calc"] .tool-cat-tag { background: rgba(245, 158, 11, 0.12); color: #FBBF24; }

        .tool-card[data-cat="ai"] .tool-icon { background: rgba(139, 92, 246, 0.15); color: #A78BFA; transition: box-shadow 400ms; }
        .tool-card[data-cat="ai"]:hover .tool-icon { box-shadow: 0 0 20px rgba(139,92,246,0.3); }
        .tool-card[data-cat="ai"] .tool-cat-tag { background: rgba(139, 92, 246, 0.12); color: #A78BFA; }

        .tool-card[data-cat="life"] .tool-icon { background: rgba(249, 115, 22, 0.15); color: #FB923C; transition: box-shadow 400ms; }
        .tool-card[data-cat="life"]:hover .tool-icon { box-shadow: 0 0 20px rgba(249,115,22,0.3); }
        .tool-card[data-cat="life"] .tool-cat-tag { background: rgba(249, 115, 22, 0.12); color: #FB923C; }

        .tool-card[data-cat="pro"] .tool-icon { background: rgba(6, 182, 212, 0.15); color: #22D3EE; transition: box-shadow 400ms; }
        .tool-card[data-cat="pro"]:hover .tool-icon { box-shadow: 0 0 20px rgba(6,182,212,0.3); }
        .tool-card[data-cat="pro"] .tool-cat-tag { background: rgba(6, 182, 212, 0.12); color: #22D3EE; }

        /* ============================================
           Sub-Category Filter Bar
           ============================================ */
        .sub-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; overflow-x: auto; max-height: 200px; opacity: 1; transition: opacity 200ms var(--ease), max-height 200ms var(--ease), margin-bottom 200ms var(--ease); }
        .sub-filter.is-hidden { opacity: 0; max-height: 0; margin-bottom: 0; pointer-events: none; overflow: hidden; }
        .sub-filter::-webkit-scrollbar { height: 4px; }
        .sub-filter::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 4px; }
        .sub-pill { padding: 6px 14px; border-radius: var(--r-full); font-size: 0.78rem; font-weight: 500; color: var(--text-2); background: var(--bg-glass); border: 1px solid var(--border-glass); cursor: pointer; white-space: nowrap; transition: all 200ms; }
        .sub-pill:hover { color: var(--text-1); border-color: var(--border-glass-hover); background: var(--bg-glass-hover); }
        .sub-pill.active { color: #fff; border-color: transparent; }
        .sub-pill .sub-count { font-family: var(--ff-mono); font-size: 0.65rem; opacity: 0.6; margin-left: 4px; }

        /* ============================================
           Pagination / Load More
           ============================================ */
        .load-more-wrap { text-align: center; padding: 32px 0 8px; }
        .load-more { display: inline-flex; align-items: center; gap: 8px; padding: 12px 32px; border-radius: var(--r-full); font-size: 0.88rem; font-weight: 600; color: var(--text-1); background: var(--bg-glass); backdrop-filter: blur(12px); border: 1px solid var(--border-glass); cursor: pointer; transition: all 300ms var(--ease); position: relative; }
        .load-more:hover { border-color: var(--border-brand); color: var(--brand-light); box-shadow: var(--shadow-glow); transform: translateY(-2px); }
        .load-more:disabled { opacity: 0.4; cursor: default; transform: none; }
        .results-count { display: none; }

        /* ============================================
           Category Nav Grid (8 categories)
           ============================================ */
        .cat-nav-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 32px; }
        .cat-nav-card { padding: 20px; border-radius: var(--r-md); background: var(--bg-glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--border-glass); cursor: pointer; transition: all 300ms var(--ease); display: flex; align-items: center; gap: 12px; }
        .cat-nav-card:hover { background: var(--bg-glass-hover); transform: translateY(-2px); box-shadow: var(--shadow-glass); }
        .cat-nav-card.active { border-color: transparent; }
        .cat-nav-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .cat-nav-info { flex: 1; min-width: 0; }
        .cat-nav-name { font-family: var(--ff-display); font-size: 0.9rem; font-weight: 600; color: var(--text-1); }
        .cat-nav-count { font-family: var(--ff-mono); font-size: 0.72rem; color: var(--text-3); }

        @media (max-width: 768px) {
            .cat-nav-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 480px) {
            .cat-nav-grid { grid-template-columns: 1fr; }
        }

        /* ============================================
           Tool Detail Page - 工具详情页
           ============================================ */
        .tool-detail { max-width: 1280px; margin: 0 auto; padding: 100px 0px 60px; }

        /* Breadcrumb */
        .detail-breadcrumb { margin-bottom: 16px; }
        .detail-crumb { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--text-3); }
        .detail-crumb a { color: var(--text-2); transition: color 200ms; }
        .detail-crumb a:hover { color: var(--brand-light); }
        .detail-crumb .sep { color: var(--text-4); font-size: 0.7rem; }
        .detail-crumb .current { color: var(--text-1); }

        /* Detail Header */
        .detail-section { margin-bottom: 32px; }
        .detail-header { text-align: left; padding: 0; }
        .detail-title { font-family: var(--ff-display); font-size: 1.8rem; font-weight: 700; line-height: 1.3; margin: 0 0 8px; display: inline-flex; align-items: center; gap: 10px; }
        .detail-desc { font-size: 0.95rem; color: var(--text-2); line-height: 1.6; margin: 0; }

        /* Help Icon */
        .detail-help-icon { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background: var(--bg-glass); border: 1px solid var(--border-glass); color: var(--text-2); cursor: help; transition: all 200ms; }
        .detail-help-icon:hover { color: var(--brand-light); border-color: var(--brand); }
        .detail-help-icon svg { width: 14px; height: 14px; }
        .detail-help-popover { position: absolute; top: calc(100% + 8px); left: 0; min-width: 280px; max-width: 380px; background: rgba(16, 16, 36, 0.95); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border: 1px solid var(--border-glass); border-radius: var(--r-md); box-shadow: 0 12px 40px rgba(0,0,0,0.3); opacity: 0; visibility: hidden; transform: translateY(-8px); transition: all 200ms; z-index: 100; }
        .detail-help-popover.show { opacity: 1; visibility: visible; transform: translateY(0); }
        .help-popover-header { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border-glass); font-size: 0.9rem; font-weight: 600; color: var(--text-1); }
        .help-popover-header svg { width: 16px; height: 16px; color: var(--brand-light); }
        .help-popover-close { margin-left: auto; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; border: none; background: transparent; color: var(--text-3); cursor: pointer; border-radius: 50%; font-size: 14px; transition: all 150ms; }
        .help-popover-close:hover { color: var(--text-1); background: var(--bg-glass); }
        .help-popover-body { padding: 12px 16px; max-height: 300px; overflow-y: auto; }
        .sidebar-instructions { padding-left: 18px; margin: 0; font-size: 0.82rem; color: var(--text-2); line-height: 1.7; }
        .sidebar-instructions li { margin-bottom: 4px; }
        .sidebar-instructions li::marker { color: var(--brand-light); }

        /* Workspace */
        .detail-section { margin-bottom: 32px; }
        .workspace-main { min-width: 0; }
        .workspace-sidebar { display: none; }

        /* Placeholder */
        .detail-placeholder { padding: 64px 32px; text-align: center; }
        .ph-icon { width: 64px; height: 64px; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: var(--bg-deep); }
        .ph-icon svg { width: 32px; height: 32px; color: var(--text-3); }
        .detail-placeholder h2 { font-family: var(--ff-display); font-size: 1.25rem; font-weight: 600; margin-bottom: 8px; }
        .detail-placeholder p { color: var(--text-2); margin-bottom: 24px; }
        .detail-actions-text { color: var(--text-2); margin-bottom: 20px; }
        .detail-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

        /* Buttons */
        .btn-glow { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--r-full); font-size: 0.9rem; font-weight: 600; color: #fff; transition: all 200ms; }
        .btn-glow:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(123, 97, 255, 0.4); }
        .btn-glow svg { width: 18px; height: 18px; }
        .btn-ghost-glass { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--r-full); font-size: 0.9rem; font-weight: 500; color: var(--text-1); background: var(--bg-glass); border: 1px solid var(--border-glass); transition: all 200ms; }
        .btn-ghost-glass:hover { background: var(--bg-glass-hover); border-color: var(--border-glass-hover); }
        .btn-ghost-glass svg { width: 18px; height: 18px; }

        /* Section Divider */
        .detail-divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border-glass), transparent); margin: 40px 0; border: none; }

        /* Related Tools Section */
        .detail-related { }
        .detail-related-title { font-family: var(--ff-display); font-size: 1.1rem; font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
        .detail-related-title::before { content: ''; display: inline-block; width: 3px; height: 18px; background: var(--grad-aurora); border-radius: 2px; }
        .related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
        .related-card { display: block; padding: 16px; border-radius: var(--r-md); background: var(--bg-glass); border: 1px solid var(--border-glass); transition: all 200ms; text-decoration: none; color: inherit; }
        .related-card:hover { background: var(--bg-glass-hover); transform: translateY(-2px); border-color: var(--brand); }
        .rel-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
        .rel-icon { width: 36px; height: 36px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .rel-icon svg { width: 18px; height: 18px; color: #fff; }
        .rel-name { font-size: 0.88rem; font-weight: 500; color: var(--text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        .rel-desc { font-size: 0.78rem; color: var(--text-3); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

        /* Related Articles Section — 复用文章页热门阅读样式 */
        .detail-articles { margin-top: 32px; }
        .detail-articles-title { font-family: var(--ff-display); font-size: 1.1rem; font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
        .detail-articles-title::before { content: ''; display: inline-block; width: 3px; height: 18px; background: var(--grad-aurora); border-radius: 2px; }
        .detail-hot-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }

        @media (max-width: 1024px) {
            .tool-detail { padding: 100px 32px 60px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .detail-hot-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .tool-detail { padding: 90px 20px 40px; }
            .detail-title { font-size: 1.4rem; }
            .related-grid { grid-template-columns: 1fr; }
            .detail-divider { margin: 24px 0; }
        }

        /* ============================================
           Utility Classes
           ============================================ */
        .hidden { display: none !important; }

        .loading-spinner { width: 36px; height: 36px; border: 2px solid var(--border-glass); border-top-color: var(--brand); border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto; }
        @keyframes spin { to { transform: rotate(360deg); } }

        .empty-state { text-align: center; padding: 80px 24px; color: var(--text-3); grid-column: 1/-1; }
        .empty-state h3 { color: var(--text-1); font-size: 1.1rem; margin-bottom: 8px; }

        /* ============================================
           Articles Section — 文章列表页（精致通透版）
           ============================================ */
        .hero--articles { min-height: auto; padding: 136px 48px 56px; }
        .hero--articles .hero-inner { max-width: 760px; }
        .hero--articles .hero-desc { margin-bottom: 30px; }
        .hero--articles .hero-search-wrap { max-width: 540px; }

        .articles-section { max-width: 1320px; margin: 0 auto; padding: 64px 48px 36px; }

        /* Category Filter — 精致玻璃胶囊（仅作用于文章页，不影响工具广场） */
        #catFilter { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
        #catFilter .cat-pill { position: relative; display: inline-flex; align-items: center; gap: 7px; padding: 9px 18px; border: none; border-radius: var(--r-full); font-size: 0.82rem; font-weight: 500; color: var(--text-2); background: var(--bg-glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); cursor: pointer; white-space: nowrap; overflow: hidden; transition: color 240ms var(--ease), transform 240ms var(--ease), background 240ms var(--ease); }
        #catFilter .cat-pill::before { content: ''; position: absolute; inset: 0; border-radius: var(--r-full); padding: 1px; background: linear-gradient(135deg, rgba(255,255,255,0.22), rgba(255,255,255,0.05)); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; transition: background 300ms var(--ease); }
        #catFilter .cat-pill:hover { color: var(--text-1); background: var(--bg-glass-hover); transform: translateY(-2px); }
        #catFilter .cat-pill:hover::before { background: linear-gradient(135deg, var(--aurora-1), var(--aurora-2)); }
        #catFilter .cat-pill.active { color: #fff; background: rgba(123,97,255,0.14); box-shadow: 0 0 22px rgba(123,97,255,0.22); }
        #catFilter .cat-pill.active::before { background: var(--grad-aurora); }
        #catFilter .cat-pill-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
        #catFilter .cat-pill-count { font-family: var(--ff-mono); font-size: 0.68rem; opacity: 0.55; }

        /* Grid */
        .articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

        /* Article Card */
        .article-card { position: relative; display: flex; flex-direction: column; border-radius: var(--r-lg); background: linear-gradient(160deg, rgba(255,255,255,0.055), rgba(255,255,255,0.018)); backdrop-filter: blur(22px); -webkit-backdrop-filter: blur(22px); border: 1px solid var(--border-glass); overflow: hidden; cursor: pointer; transition: transform 360ms var(--ease), box-shadow 360ms var(--ease), border-color 360ms var(--ease), opacity 360ms var(--ease); }
        .article-card::before { content: ''; position: absolute; inset: 0; border-radius: var(--r-lg); padding: 1px; background: var(--grad-aurora); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity 360ms var(--ease); pointer-events: none; z-index: 5; }
        .article-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-glass-lg), var(--shadow-glow); border-color: transparent; }
        .article-card:hover::before { opacity: 1; }
        .article-card::after { content: ''; position: absolute; top: 0; left: -120%; width: 55%; height: 100%; background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,0.05) 48%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.05) 52%, transparent 70%); transition: left 700ms var(--ease); pointer-events: none; z-index: 2; }
        .article-card:hover::after { left: 160%; }

        /* 封面：保留全局 .article-cover（供详情页复用），卡片内做细化 */
        .article-cover { width: 100%; height: 180px; overflow: hidden; position: relative; }
        .article-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms var(--ease); }
        .article-card .article-cover { height: 196px; background: var(--grad-aurora); }
        .article-card:hover .article-cover img { transform: scale(1.06); }
        .article-cover.is-empty { background: linear-gradient(135deg, rgba(123,97,255,0.28), rgba(34,211,238,0.14) 52%, rgba(255,0,110,0.20)); }
        .article-cover-ph { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: radial-gradient(circle at 24% 22%, rgba(255,255,255,0.12), transparent 42%), radial-gradient(circle at 80% 82%, rgba(255,255,255,0.07), transparent 46%); }
        .article-ph-icon { width: 46px; height: 46px; color: rgba(255,255,255,0.55); }
        .article-cover-shade { position: absolute; left: 0; right: 0; bottom: 0; height: 62%; background: linear-gradient(to top, rgba(8,8,26,0.6), transparent); pointer-events: none; }
        .article-cover-cat { position: absolute; top: 12px; left: 12px; z-index: 2; font-family: var(--ff-mono); font-size: 0.62rem; letter-spacing: 0.04em; padding: 3px 11px; border-radius: var(--r-full); color: #fff; background: rgba(8,8,26,0.42); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.16); }
        .article-badges { position: absolute; top: 12px; right: 12px; z-index: 2; display: flex; gap: 6px; }
        .article-badge { font-family: var(--ff-mono); font-size: 0.6rem; font-weight: 600; padding: 3px 10px; border-radius: var(--r-full); color: #fff; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.18); }
        .article-badge.badge-top { background: rgba(123,97,255,0.5); }
        .article-badge.badge-hot { background: rgba(255,0,110,0.45); }

        /* 兼容详情页全局规则，保持原状 */
        .article-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
        .article-title { font-family: var(--ff-display); font-size: 1.05rem; font-weight: 600; color: var(--text-1); line-height: 1.4; margin: 0 0 8px; transition: color 200ms; }

        .article-body { position: relative; z-index: 3; display: flex; flex-direction: column; flex: 1; padding: 22px 24px 22px; }
        .article-card .article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
        .article-card .article-card-title { font-family: var(--ff-display); font-size: 1.12rem; font-weight: 600; color: var(--text-1); line-height: 1.4; margin: 0 0 10px; letter-spacing: -0.01em; transition: color 240ms var(--ease); }
        .article-card:hover .article-card-title { color: var(--brand-light); }
        .article-date { font-family: var(--ff-mono); font-size: 0.72rem; color: var(--text-3); }
        .article-by { display: inline-flex; align-items: center; gap: 4px; font-size: 0.74rem; color: var(--text-2); }
        .article-by svg { width: 12px; height: 12px; opacity: 0.7; }
        .article-src { font-size: 0.74rem; color: var(--text-3); }
        .article-card .article-summary { font-size: 0.84rem; color: var(--text-2); line-height: 1.65; margin: 0 0 16px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .article-card .article-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
        .article-card .article-tag { font-family: var(--ff-mono); font-size: 0.66rem; padding: 3px 10px; border-radius: var(--r-full); color: var(--brand-light); background: rgba(123,97,255,0.1); border: 1px solid rgba(123,97,255,0.18); }
        .article-card .article-foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border-glass); }
        .article-card .article-views { display: inline-flex; align-items: center; gap: 5px; font-family: var(--ff-mono); font-size: 0.72rem; color: var(--text-3); }
        .article-card .article-views svg { width: 14px; height: 14px; }
        .article-card .article-arrow { display: inline-flex; color: var(--text-3); transition: all 240ms var(--ease); }
        .article-card:hover .article-arrow { color: var(--brand-light); transform: translateX(4px); }
        .article-link { position: absolute; inset: 0; z-index: 10; }

        /* Hot Articles — 精致阅读榜 */
        .hot-articles-section { max-width: 1320px; margin: 0 auto; padding: 56px 48px 80px; }
        .hot-articles-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
        .hot-article-card { position: relative; display: flex; align-items: center; gap: 16px; padding: 18px 22px; border-radius: var(--r-md); background: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.018)); border: 1px solid var(--border-glass); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); transition: transform 260ms var(--ease), border-color 260ms var(--ease), background 260ms var(--ease); text-decoration: none; overflow: hidden; }
        .hot-article-card::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad-aurora); opacity: 0; transition: opacity 260ms var(--ease); }
        .hot-article-card:hover { transform: translateX(6px); background: var(--bg-glass-hover); border-color: var(--border-brand); }
        .hot-article-card:hover::before { opacity: 1; }
        .hot-rank { font-family: var(--ff-mono); font-size: 0.7rem; color: var(--brand-light); white-space: nowrap; flex-shrink: 0; padding: 4px 10px; border-radius: var(--r-full); background: rgba(123,97,255,0.12); border: 1px solid rgba(123,97,255,0.18); }
        .hot-title { font-size: 0.9rem; font-weight: 500; color: var(--text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color 240ms var(--ease); }
        .hot-article-card:hover .hot-title { color: var(--brand-light); }

        /* Article page responsive */
        @media (max-width: 768px) {
            .hero--articles { padding: 110px 22px 44px; }
            #catFilter { gap: 8px; }
            #catFilter .cat-pill { padding: 8px 14px; font-size: 0.78rem; }
            .article-card .article-cover { height: 172px; }
        }

        /* Article Detail */
        .article-detail-hero { text-align: center; max-width: 800px; margin: 0 auto; }
        .article-detail-meta { display: flex; align-items: center; justify-content: center; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
        .article-detail-cat { font-family: var(--ff-mono); font-size: 0.72rem; padding: 4px 12px; border-radius: var(--r-full); background: rgba(123,97,255,0.12); color: var(--brand-light); text-decoration: none; transition: all 200ms; }
        .article-detail-cat:hover { background: rgba(123,97,255,0.2); }
        .article-detail-date { font-family: var(--ff-mono); font-size: 0.78rem; color: var(--text-3); }
        .article-detail-views { display: flex; align-items: center; gap: 4px; font-family: var(--ff-mono); font-size: 0.72rem; color: var(--text-3); }
        .article-detail-title { font-family: var(--ff-display); font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
        .article-detail-summary { font-size: 1rem; color: var(--text-2); max-width: 600px; margin: 0 auto 20px; line-height: 1.6; }
        .article-content-section { max-width: 800px; margin: 0 auto; padding: 40px 48px 80px; }
        .article-content-wrap { background: var(--bg-glass); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border: 1px solid var(--border-glass); border-radius: var(--r-lg); padding: 40px; }
        .article-detail-cover { margin: -40px -40px 32px; border-radius: var(--r-lg) var(--r-lg) 0 0; overflow: hidden; }
        .article-detail-cover img { width: 100%; height: auto; display: block; }
        .article-content-body { font-size: 1rem; color: var(--text-1); line-height: 1.8; }
        .article-content-body h2 { font-family: var(--ff-display); font-size: 1.4rem; font-weight: 700; margin: 32px 0 16px; color: var(--text-1); }
        .article-content-body h3 { font-family: var(--ff-display); font-size: 1.15rem; font-weight: 600; margin: 24px 0 12px; color: var(--text-1); }
        .article-content-body p { margin: 0 0 16px; }
        .article-content-body ul, .article-content-body ol { margin: 0 0 16px 20px; padding-left: 0; }
        .article-content-body li { margin-bottom: 6px; }
        .article-content-body code { font-family: var(--ff-mono); font-size: 0.88rem; padding: 2px 6px; border-radius: 4px; background: rgba(123,97,255,0.1); color: var(--brand-light); }
        .article-content-body pre { background: var(--bg-deep); border: 1px solid var(--border-glass); border-radius: var(--r-md); padding: 16px; overflow-x: auto; margin: 16px 0; }
        .article-content-body pre code { background: none; padding: 0; color: var(--text-1); }
        .article-content-body blockquote { border-left: 3px solid var(--brand); padding-left: 16px; margin: 16px 0; color: var(--text-2); font-style: italic; }
        .article-content-body img { max-width: 100%; border-radius: var(--r-md); margin: 16px 0; }
        .article-content-body a { color: var(--brand-light); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 200ms; }
        .article-content-body a:hover { border-bottom-color: var(--brand-light); }
        .article-detail-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border-glass); }
        .article-detail-share { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--text-2); }
        .share-btn { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: var(--bg-glass); border: 1px solid var(--border-glass); color: var(--text-2); cursor: pointer; transition: all 200ms; }
        .share-btn:hover { background: var(--bg-glass-hover); border-color: var(--brand-light); color: var(--brand-light); }
        .back-link { display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--text-2); text-decoration: none; transition: color 200ms; }
        .back-link:hover { color: var(--brand-light); }
        .related-articles-section { max-width: 1280px; margin: 0 auto; padding: 60px 48px 80px; }

        /* Pagination */
        .articles-section .pagination { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 44px; }
        .articles-section .page-btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 22px; border-radius: var(--r-full); font-size: 0.82rem; font-weight: 500; color: var(--text-1); background: var(--bg-glass); border: 1px solid var(--border-glass); text-decoration: none; transition: all 240ms var(--ease); }
        .articles-section .page-btn:hover { color: #fff; border-color: var(--border-brand); background: rgba(123,97,255,0.14); box-shadow: 0 0 18px rgba(123,97,255,0.2); transform: translateY(-1px); }
        .articles-section .page-info { font-family: var(--ff-mono); font-size: 0.78rem; color: var(--text-3); }

        @media (max-width: 1024px) {
            .articles-grid { grid-template-columns: repeat(2, 1fr); }
            .hot-articles-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .articles-section, .hot-articles-section, .related-articles-section { padding-left: 24px; padding-right: 24px; }
            .articles-grid { grid-template-columns: 1fr; }
            .article-content-section { padding: 24px 16px 60px; }
            .article-content-wrap { padding: 24px; }
            .article-detail-cover { margin: -24px -24px 24px; }
            .article-detail-title { font-size: 1.6rem; }
            .hot-articles-section { padding-left: 24px; padding-right: 24px; }
            .article-container { padding: 0 20px; }
            .article-title { font-size: 1.8rem !important; }
            .article-nav { flex-direction: column; }
            .nav-item { width: 100% !important; }
        }

        /* ========== Article Detail V2 Layout (1280px) ========== */

        /* Breadcrumb */
        .article-breadcrumb {
            max-width: 1280px;
            margin: 0 auto;
            padding: 100px 48px 20px 0px;
        }
        .bc-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            flex-wrap: wrap;
        }
        .bc-link {
            color: var(--text-3);
            text-decoration: none;
            transition: color 200ms;
        }
        .bc-link:hover {
            color: var(--brand-light);
        }
        .bc-sep {
            color: var(--text-4);
            font-size: 0.75rem;
        }
        .bc-current {
            color: var(--text-2);
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* Article Main - 1280px 居中单栏布局 */
        .article-main {
            padding: 20px 48px 60px;
        }
        .article-container {
            max-width: 1280px;
            margin: 0 auto;
        }

        /* Article Header */
        .article-header {
            text-align: center;
            margin-bottom: 32px;
        }
        .article-cat-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-family: var(--ff-mono);
            font-size: 0.72rem;
            padding: 5px 14px;
            border-radius: var(--r-full);
            background: rgba(123, 97, 255, 0.12);
            color: var(--brand-light);
            text-decoration: none;
            transition: all 200ms;
            margin-bottom: 20px;
        }
        .article-cat-badge:hover {
            background: rgba(123, 97, 255, 0.22);
        }
        .cat-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
        }
        .article-header .article-title {
            font-family: var(--ff-display);
            font-size: clamp(1.6rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
        }
        .article-header .article-summary {
            font-size: 1.05rem;
            color: var(--text-2);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.82rem;
            color: var(--text-3);
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .meta-item svg {
            opacity: 0.7;
        }

        /* Article Cover */
        .article-cover {
            margin: 0 0 32px;
            border-radius: var(--r-lg);
            overflow: hidden;
            border: 1px solid var(--border-glass);
        }
        .article-cover img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Article Content */
        .article-content {
            font-size: 1.02rem;
            color: var(--text-1);
            line-height: 1.9;
            margin-bottom: 32px;
        }
        .article-content h2 {
            font-family: var(--ff-display);
            font-size: 1.5rem;
            font-weight: 700;
            margin: 36px 0 18px;
            color: var(--text-1);
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-glass);
        }
        .article-content h3 {
            font-family: var(--ff-display);
            font-size: 1.2rem;
            font-weight: 600;
            margin: 28px 0 14px;
            color: var(--text-1);
        }
        .article-content p {
            margin: 0 0 18px;
            text-align: justify;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 18px 24px;
            padding-left: 0;
        }
        .article-content li {
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .article-content code {
            font-family: var(--ff-mono);
            font-size: 0.88rem;
            padding: 2px 8px;
            border-radius: 6px;
            background: rgba(123, 97, 255, 0.12);
            color: var(--brand-light);
        }
        .article-content pre {
            background: var(--bg-deep);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-md);
            padding: 20px;
            overflow-x: auto;
            margin: 20px 0;
        }
        .article-content pre code {
            background: none;
            padding: 0;
            color: var(--text-1);
            font-size: 0.88rem;
        }
        .article-content blockquote {
            border-left: 3px solid var(--brand);
            padding: 12px 20px;
            margin: 20px 0;
            color: var(--text-2);
            font-style: italic;
            background: rgba(123, 97, 255, 0.05);
            border-radius: 0 var(--r-md) var(--r-md) 0;
        }
        .article-content img {
            max-width: 100%;
            border-radius: var(--r-md);
            margin: 20px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .article-content a {
            color: var(--brand-light);
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: border-color 200ms;
        }
        .article-content a:hover {
            border-bottom-color: var(--brand-light);
        }

        /* Article Tags */
        .article-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            padding: 20px 0;
            margin-bottom: 20px;
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .tags-label {
            font-size: 0.85rem;
            color: var(--text-3);
            font-weight: 500;
        }
        .tag-item {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--r-full);
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            font-size: 0.8rem;
            color: var(--text-2);
            text-decoration: none;
            transition: all 200ms;
        }
        .tag-item:hover {
            border-color: var(--brand-light);
            color: var(--brand-light);
            background: rgba(123, 97, 255, 0.1);
        }

        /* Share Button Inline */
        .share-btn-inline {
            background: none;
            border: none;
            color: var(--text-3);
            font-size: 0.82rem;
            cursor: pointer;
            padding: 0;
            display: inline-flex;
            align-items: center;
            font-family: inherit;
            transition: color 200ms;
        }
        .share-btn-inline:hover {
            color: var(--brand-light);
        }
        .share-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--r-md);
            background: var(--bg-deep);
            border: 1px solid var(--border-glass);
            color: var(--text-1);
            font-size: 0.85rem;
            cursor: pointer;
            transition: all 200ms;
        }
        .share-btn:hover {
            border-color: var(--brand-light);
            color: var(--brand-light);
        }

        /* Article Nav (Prev/Next) */
        .article-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 48px;
        }
        .nav-item {
            display: block;
            padding: 20px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-md);
            text-decoration: none;
            transition: all 200ms;
        }
        .nav-item:hover {
            border-color: var(--brand-light);
            transform: translateY(-2px);
        }
        .nav-prev {
            text-align: left;
        }
        .nav-next {
            text-align: right;
        }
        .nav-disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        .nav-dir {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-family: var(--ff-mono);
            color: var(--text-3);
            margin-bottom: 8px;
        }
        .nav-prev .nav-dir {
            justify-content: flex-start;
        }
        .nav-next .nav-dir {
            justify-content: flex-end;
        }
        .nav-title {
            font-size: 0.95rem;
            color: var(--text-1);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        /* Related Section */
        .related-section,
        .tools-section {
            padding: 30px 0px;
            box-sizing: border-box;
        }
        .container-inner {
            max-width: 1280px;
            margin: 0 auto;
        }
        .related-section .articles-grid {
            grid-template-columns: repeat(4, 1fr);
        }

        /* Tools Section */
        .tools-section {
            background: rgba(123, 97, 255, 0.02);
        }
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .tool-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-md);
            text-decoration: none;
            transition: all 250ms;
            position: relative;
        }
        .tool-card:hover {
            border-color: var(--brand-light);
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(123, 97, 255, 0.15);
        }
        .tool-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--r-md);
            background: linear-gradient(135deg, rgba(123, 97, 255, 0.2), rgba(0, 212, 255, 0.2));
            color: var(--brand-light);
            flex-shrink: 0;
        }
        .tool-info {
            flex: 1;
            min-width: 0;
        }
        .tool-name {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 4px;
        }
        .tool-desc {
            font-size: 0.82rem;
            color: var(--text-3);
            line-height: 1.4;
            margin: 0;
        }
        .tool-arrow {
            position: absolute;
            top: 20px;
            right: 20px;
            color: var(--text-4);
            transition: color 200ms, transform 200ms;
        }
        .tool-card:hover .tool-arrow {
            color: var(--brand-light);
            transform: translateX(4px);
        }

        /* ========== Sidebar Cards ========== */
        .sidebar-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-md);
            padding: 20px;
            margin-bottom: 20px;
        }
        .sidebar-title {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-1);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-glass);
        }
        .sidebar-dot {
            width: 4px;
            height: 16px;
            border-radius: 2px;
            background: var(--brand);
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .sidebar-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            text-decoration: none;
            transition: all 200ms;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .sidebar-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .sidebar-item:hover {
            opacity: 0.85;
        }
        .sidebar-num {
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--text-4);
            background: var(--bg-deep);
            border-radius: 4px;
            flex-shrink: 0;
        }
        .sidebar-num-hot {
            background: var(--brand);
            color: #fff;
        }
        .sidebar-item-body {
            flex: 1;
            min-width: 0;
        }
        .sidebar-item-title {
            font-size: 0.85rem;
            color: var(--text-1);
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .sidebar-item-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.72rem;
            color: var(--text-4);
        }
        .sidebar-views {
            display: inline-flex;
            align-items: center;
            gap: 3px;
        }
        .sidebar-tools {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-tool-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px;
            border-radius: var(--r-sm);
            text-decoration: none;
            transition: all 200ms;
        }
        .sidebar-tool-item:hover {
            background: rgba(123, 97, 255, 0.08);
        }
        .sidebar-tool-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--r-sm);
            background: linear-gradient(135deg, rgba(123, 97, 255, 0.2), rgba(0, 212, 255, 0.2));
            color: var(--brand-light);
            flex-shrink: 0;
        }
        .sidebar-tool-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-tool-name {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-1);
            margin-bottom: 2px;
        }
        .sidebar-tool-desc {
            font-size: 0.72rem;
            color: var(--text-4);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ========== Related List (简洁列表) ========== */
        .related-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-md);
            overflow: hidden;
        }
        .related-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 20px;
            text-decoration: none;
            transition: background 200ms;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .related-item:last-child {
            border-bottom: none;
        }
        .related-item:hover {
            background: rgba(123, 97, 255, 0.06);
        }
        .related-num {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-4);
            background: var(--bg-deep);
            border-radius: 6px;
            flex-shrink: 0;
        }
        .related-item:nth-child(-n+3) .related-num {
            background: var(--brand);
            color: #fff;
        }
        .related-title {
            flex: 1;
            font-size: 0.95rem;
            color: var(--text-1);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .related-date {
            font-size: 0.8rem;
            color: var(--text-4);
            flex-shrink: 0;
        }
        .related-views {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.8rem;
            color: var(--text-4);
            flex-shrink: 0;
        }
        .related-arrow {
            color: var(--text-4);
            transition: color 200ms, transform 200ms;
            flex-shrink: 0;
        }
        .related-item:hover .related-arrow {
            color: var(--brand-light);
            transform: translateX(4px);
        }

        @media (max-width: 1024px) {
            .tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .article-breadcrumb {
                padding: 90px 24px 16px;
            }
            .article-main {
                padding: 16px 20px 40px;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.78rem;
            }
            .article-nav {
                grid-template-columns: 1fr;
            }
            .nav-next {
                text-align: left;
            }
            .nav-next .nav-dir {
                justify-content: flex-start;
            }
            .related-section,
            .tools-section {
                padding: 40px 20px;
            }
            .tools-grid {
                grid-template-columns: 1fr;
            }
            .related-item {
                flex-wrap: wrap;
                gap: 8px 12px;
            }
            .related-title {
                flex: 1 1 100%;
            }
        }

        /* ============================================
           返回顶部 + 意见反馈 浮动按钮（Aurora Glass）
           ============================================ */
        .fab-group {
            position: fixed;
            right: 24px;
            bottom: 112px;
            z-index: 101;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 14px;
        }
        .fab {
            width: 50px;
            height: 50px;
            border-radius: var(--r-full);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--text-1);
            background: var(--bg-surface);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-glass);
            transition: transform 300ms var(--ease), box-shadow 300ms var(--ease), border-color 300ms var(--ease), background 300ms var(--ease);
        }
        .fab:hover {
            transform: translateY(-3px) scale(1.06);
            box-shadow: var(--shadow-glass-lg), var(--shadow-glow);
            border-color: var(--border-brand);
        }
        .fab-feedback {
            background: linear-gradient(135deg, rgba(123, 97, 255, 0.92), rgba(0, 212, 255, 0.85));
            border-color: rgba(255, 255, 255, 0.20);
        }
        .fab-feedback:hover {
            box-shadow: 0 10px 30px rgba(123, 97, 255, 0.45);
        }
        .fab-top {
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: opacity 300ms var(--ease), transform 300ms var(--ease), box-shadow 300ms var(--ease), border-color 300ms var(--ease), background 300ms var(--ease);
        }
        .fab-top.is-visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        /* 意见反馈弹窗 */
        .feedback-modal {
            position: fixed;
            inset: 0;
            z-index: 9999;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        .feedback-modal.is-open {
            display: flex;
        }
        .feedback-modal-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(3, 3, 12, 0.6);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }
        .feedback-modal-card {
            position: relative;
            width: 100%;
            max-width: 440px;
            background: rgba(14, 14, 34, 0.96);
            backdrop-filter: blur(28px);
            -webkit-backdrop-filter: blur(28px);
            border: 1px solid rgba(123, 97, 255, 0.28);
            border-radius: var(--r-xl);
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(123, 97, 255, 0.12);
            padding: 28px 26px 26px;
            animation: feedbackPop 320ms var(--ease-bounce);
        }
        @keyframes feedbackPop {
            from { opacity: 0; transform: translateY(18px) scale(0.96); }
            to   { opacity: 1; transform: translateY(0) scale(1); }
        }
        .feedback-modal-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .feedback-modal-head h3 {
            font-family: var(--ff-display);
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-1);
        }
        .feedback-modal-close {
            width: 34px;
            height: 34px;
            border-radius: var(--r-full);
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            color: var(--text-2);
            font-size: 1.4rem;
            line-height: 1;
            cursor: pointer;
            transition: all 200ms;
        }
        .feedback-modal-close:hover {
            color: var(--text-1);
            background: var(--bg-glass-hover);
            transform: rotate(90deg);
        }
        .feedback-modal-sub {
            font-size: 0.85rem;
            color: var(--text-2);
            margin: 6px 0 18px;
        }
        .feedback-textarea {
            width: 100%;
            min-height: 130px;
            resize: vertical;
            background: rgba(8, 8, 26, 0.6);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-md);
            color: var(--text-1);
            font-family: var(--ff-body);
            font-size: 0.92rem;
            line-height: 1.6;
            padding: 14px 16px;
            outline: none;
            transition: border-color 200ms, box-shadow 200ms;
        }
        .feedback-textarea::placeholder { color: var(--text-3); }
        .feedback-textarea:focus {
            border-color: var(--border-brand);
            box-shadow: 0 0 0 3px rgba(123, 97, 255, 0.15);
        }
        .feedback-meta-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-top: 12px;
        }
        .feedback-contact {
            flex: 1;
            background: rgba(8, 8, 26, 0.6);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-full);
            color: var(--text-1);
            font-family: var(--ff-body);
            font-size: 0.82rem;
            padding: 9px 16px;
            outline: none;
            transition: border-color 200ms;
        }
        .feedback-contact::placeholder { color: var(--text-3); }
        .feedback-contact:focus { border-color: var(--border-brand); }
        .feedback-count {
            font-family: var(--ff-mono);
            font-size: 0.74rem;
            color: var(--text-3);
            white-space: nowrap;
        }
        .feedback-error {
            margin-top: 10px;
            font-size: 0.82rem;
            color: #ff9a9a;
            min-height: 0;
        }
        .feedback-submit {
            width: 100%;
            margin-top: 16px;
            padding: 13px;
            border: none;
            border-radius: var(--r-full);
            cursor: pointer;
            font-family: var(--ff-display);
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: var(--grad-aurora);
            background-size: 200% 200%;
            box-shadow: 0 8px 24px rgba(123, 97, 255, 0.35);
            transition: background-position 600ms var(--ease), transform 200ms var(--ease), box-shadow 200ms var(--ease);
        }
        .feedback-submit:hover {
            background-position: 100% 0;
            transform: translateY(-1px);
            box-shadow: 0 12px 32px rgba(123, 97, 255, 0.5);
        }
        .feedback-submit:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }
        .feedback-captcha-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 12px;
        }
        .feedback-captcha-q {
            font-family: var(--ff-mono);
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-1);
            background: rgba(123, 97, 255, 0.12);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-full);
            padding: 9px 14px;
            min-width: 96px;
            text-align: center;
            white-space: nowrap;
            user-select: none;
            transition: background 200ms, border-color 200ms;
        }
        .feedback-captcha-q:hover {
            background: rgba(123, 97, 255, 0.22);
            border-color: rgba(123, 97, 255, 0.55);
        }
        .feedback-captcha-input {
            flex: 1;
            background: rgba(8, 8, 26, 0.6);
            border: 1px solid var(--border-glass);
            border-radius: var(--r-full);
            color: var(--text-1);
            font-family: var(--ff-mono);
            font-size: 0.85rem;
            padding: 9px 16px;
            outline: none;
            transition: border-color 200ms;
        }
        .feedback-captcha-input::placeholder { color: var(--text-3); }
        .feedback-captcha-input:focus { border-color: var(--border-brand); }

        /* 反馈成功 Toast */
        .feedback-toast {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, calc(-50% + 20px));
            z-index: 10000;
            padding: 14px 26px;
            border-radius: var(--r-full);
            background: rgba(0, 255, 163, 0.16);
            border: 1px solid rgba(0, 255, 163, 0.5);
            color: #6effc0;
            font-size: 0.95rem;
            font-weight: 500;
            text-align: center;
            white-space: nowrap;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
            opacity: 0;
            visibility: hidden;
            transition: opacity 300ms var(--ease), transform 300ms var(--ease);
        }
        .feedback-toast.is-show {
            opacity: 1;
            visibility: visible;
            transform: translate(-50%, -50%);
        }

        @media (max-width: 600px) {
            .fab-group { right: 16px; bottom: 104px; }
            .fab { width: 46px; height: 46px; }
        }