:root {
            --dark: #0a1628;
            --dark-light: #111f38;
            --dark-lighter: #1a2d4d;
            --accent: #00d4ff;
            --accent-gold: #FFD700;
            --text: #1a1a1a;
            --text-light: #f0f4f8;
            --text-muted: #94a3b8;
            --bg: #ffffff;
            --bg-light: #f8fafc;
            --border: #e2e8f0;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }
        html { font-size: 16px; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; line-height: 1.7; color: var(--text); background: var(--bg); overflow-x: hidden; }
        a { color: inherit; text-decoration: none; }
        ul, ol { list-style: none; }
        img { max-width: 100%; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        /* Header & Navigation */
        header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(10, 22, 40, 0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255,255,255,0.08); }

        .nav { display: flex; justify-content: space-between; align-items: center; height: 64px; position: relative; }
        .logo { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 1.25rem; font-weight: 800; }
        .logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--accent-gold), #ffb700); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--dark); font-weight: 900; font-size: 1rem; }
        
        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a { color: rgba(255,255,255,0.85); font-size: 0.95rem; transition: 0.2s; }
        .nav-links a:hover { color: var(--accent-gold); }
        .nav-cta { display: inline-flex; align-items: center; justify-content: center; padding: 10px 22px; background: var(--accent-gold); color: var(--dark); font-weight: 700; border-radius: 6px; font-size: 0.9rem; }
        
        .mobile-menu-toggle { display: none; width: 44px; height: 44px; background: transparent; border: none; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 6px; padding: 10px; }
        .mobile-menu-toggle span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: 0.3s; }
        .mobile-menu-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
        .mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
        .mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
        
        .mobile-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(10, 22, 40, 0.98); border-bottom: 1px solid rgba(255,255,255,0.1); padding: 16px 20px; }
        .mobile-menu.active { display: block; }
        .mobile-menu a { display: block; padding: 14px 0; color: #fff; font-size: 1rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu .nav-cta { margin-top: 12px; width: 100%; text-align: center; }
        
        /* Buttons */
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; border-radius: 8px; font-weight: 700; transition: all 0.3s; cursor: pointer; border: none; font-size: 1rem; }
        .btn-primary { background: var(--accent-gold); color: var(--dark); }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 215, 0, 0.3); }
        .btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.3); }
        .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
        
        /* Section Common */
        section { padding: 90px 0; }
        .section-header { margin-bottom: 56px; }
        .section-header.center { text-align: center; }
        .section-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; line-height: 1.25; }
        .section-subtitle { color: #64748b; font-size: 1.05rem; max-width: 680px; line-height: 1.8; }
        .section-header.center .section-subtitle { margin: 0 auto; }
        .title-underline { display: inline-block; position: relative; }
        .title-underline::after { content: ''; position: absolute; bottom: -10px; left: 0; width: 48px; height: 4px; background: var(--accent-gold); border-radius: 2px; }
        .section-header.center .title-underline::after { left: 50%; transform: translateX(-50%); }
        
        /* Hero */
        .hero { position: relative; min-height: auto; background: linear-gradient(135deg, #0a1628 0%, #0f2440 50%, #163056 100%); overflow: hidden; padding: 140px 0 100px; }
        .hero::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.12) 0%, transparent 40%), radial-gradient(circle at 20% 80%, rgba(255, 215, 0, 0.08) 0%, transparent 40%); pointer-events: none; }
        .hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 60px; align-items: center; position: relative; z-index: 2; }
        .hero-label { color: var(--accent-gold); font-weight: 700; margin-bottom: 16px; font-size: 1rem; }
        .hero h1 { font-size: 3.2rem; line-height: 1.15; color: #fff; font-weight: 800; margin-bottom: 24px; }
        .hero h1 span { color: var(--accent-gold); }
        .hero-desc { font-size: 1.1rem; color: var(--text-muted); max-width: 560px; margin-bottom: 36px; line-height: 1.8; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-badges { display: flex; gap: 12px; margin-top: 40px; flex-wrap: wrap; }
        .hero-badge { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); color: #fff; padding: 8px 16px; border-radius: 20px; font-size: 0.9rem; }
        
        /* Trust Bar */
        .trust-bar { background: linear-gradient(90deg, #0a1628 0%, #0f2440 50%, #0a1628 100%); border-bottom: 1px solid rgba(255,255,255,0.06); padding: 14px 0; }
        .trust-inner { display: flex; justify-content: center; align-items: center; gap: 48px; flex-wrap: wrap; }
        .trust-item { display: flex; align-items: center; gap: 8px; color: #e8eef7; font-size: 0.95rem; font-weight: 500; }
        .trust-icon { font-size: 1.15rem; }
        .cta-hint { color: var(--text-muted); font-size: 0.85rem; margin-top: 18px; }
        
        .hero-visual { position: relative; height: 420px; display: flex; align-items: center; justify-content: center; }
        .tech-illustration img { width: 100%; height: auto; border-radius: 18px; }
        .hero-dash { width: 100%; max-width: 560px; border: 1px solid rgba(255,255,255,0.18); box-shadow: 0 24px 60px rgba(0,0,0,0.5); display: block; }
        .tech-illustration { width: 100%; height: 100%; position: relative; }
        .tech-illustration svg { width: 100%; height: 100%; }
        .floating-card { position: absolute; background: rgba(255,255,255,0.08); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.15); border-radius: 16px; padding: 16px 20px; color: #fff; animation: float 6s ease-in-out infinite; }
        .floating-card.pos1 { top: 10%; left: 0; }
        .floating-card.pos2 { top: 45%; right: 0; animation-delay: 2s; }
        .floating-card.pos3 { bottom: 12%; left: 8%; animation-delay: 4s; }
        .floating-card .num { font-size: 1.4rem; font-weight: 800; color: var(--accent-gold); }
        .floating-card .txt { font-size: 0.8rem; color: var(--text-muted); }
        @keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
        
        /* About Card */
        .about-wrap { background: var(--bg-light); padding-bottom: 90px; }
        .about-card { background: var(--bg); border-radius: 24px; padding: 48px; box-shadow: 0 20px 60px rgba(0,0,0,0.08); margin-top: 0; position: relative; z-index: 10; }
        .about-card h2 { color: var(--dark); font-size: 1.8rem; margin-bottom: 20px; }
        .about-card p { color: #475569; line-height: 1.9; }
        .about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; padding-top: 40px; border-top: 1px solid var(--border); }
        .about-stat { text-align: center; }
        .about-stat .num { font-size: 2rem; font-weight: 800; color: var(--dark); }
        .about-stat .label { color: #64748b; font-size: 0.95rem; margin-top: 4px; }
        
        /* Scenarios */
        .scenarios { background: var(--bg-light); }
        .scenario-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
        .scenario-card { background: var(--bg); border-radius: 16px; padding: 28px 16px; text-align: center; box-shadow: 0 4px 12px rgba(0,0,0,0.04); border: 1px solid var(--border); transition: 0.3s; }
        .scenario-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.08); }
        .scenario-icon { width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 14px; display: flex; align-items: center; justify-content: center; }
        .scenario-icon svg { width: 28px; height: 28px; stroke: #fff; }
        .scenario-card h3 { font-size: 0.95rem; color: var(--dark); font-weight: 600; }
        
        /* Features */
        .features-dark { background: linear-gradient(180deg, var(--dark) 0%, #0d1d33 100%); }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .feature-item { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 16px; padding: 32px; transition: 0.3s; }
        .feature-item:hover { background: rgba(255,255,255,0.07); transform: translateY(-4px); }
        .feature-icon { width: 52px; height: 52px; border-radius: 12px; background: rgba(0, 212, 255, 0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
        .feature-icon svg { width: 26px; height: 26px; stroke: var(--accent); }
        .feature-icon.gold { background: rgba(255, 215, 0, 0.1); }
        .feature-icon.gold svg { stroke: var(--accent-gold); }
        .feature-icon.green { background: rgba(34, 197, 94, 0.1); }
        .feature-icon.green svg { stroke: #22c55e; }
        .feature-icon.purple { background: rgba(168, 85, 247, 0.1); }
        .feature-icon.purple svg { stroke: #a855f7; }
        .feature-icon.red { background: rgba(239, 68, 68, 0.1); }
        .feature-icon.red svg { stroke: #ef4444; }
        .feature-icon.cyan { background: rgba(6, 182, 212, 0.1); }
        .feature-icon.cyan svg { stroke: #06b6d4; }
        .feature-item h3 { color: #fff; font-size: 1.15rem; margin-bottom: 12px; }
        .feature-item p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
        .feature-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
        .feature-tag { background: rgba(255,215,0,0.12); color: var(--accent-gold); padding: 4px 10px; border-radius: 4px; font-size: 0.75rem; }
        
        /* Feature Modules (3-group layout) */
        .feature-group { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 20px; padding: 28px; margin-bottom: 24px; transition: 0.3s; }
        .feature-group:hover { border-color: rgba(255,255,255,0.16); }
        .feature-group-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
        .feature-group-badge { flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.95rem; color: #fff; letter-spacing: 0.5px; }
        .feature-group-badge.b-blue { background: linear-gradient(135deg, #0ea5e9, #3b82f6); }
        .feature-group-badge.b-gold { background: linear-gradient(135deg, #f59e0b, #eab308); }
        .feature-group-badge.b-green { background: linear-gradient(135deg, #10b981, #22c55e); }
        .feature-group-icon { flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; }
        .feature-group-icon svg { width: 24px; height: 24px; stroke: #fff; }
        .feature-group-icon.g-blue { background: linear-gradient(135deg, rgba(14,165,233,0.25), rgba(59,130,246,0.25)); border: 1px solid rgba(14,165,233,0.4); }
        .feature-group-icon.g-gold { background: linear-gradient(135deg, rgba(245,158,11,0.22), rgba(234,179,8,0.22)); border: 1px solid rgba(245,158,11,0.4); }
        .feature-group-icon.g-green { background: linear-gradient(135deg, rgba(16,185,129,0.22), rgba(34,197,94,0.22)); border: 1px solid rgba(16,185,129,0.4); }
        .feature-group-meta { flex: 1; }
        .feature-group-title { color: #fff; font-size: 1.2rem; font-weight: 700; }
        .feature-group-desc { color: var(--text-muted); font-size: 0.85rem; margin-top: 4px; }
        .feature-group-count { flex-shrink: 0; color: rgba(255,255,255,0.3); font-size: 0.8rem; border: 1px solid rgba(255,255,255,0.12); padding: 4px 12px; border-radius: 20px; }
        .mini-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
        .mini-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; padding: 16px; display: flex; align-items: flex-start; gap: 12px; transition: 0.3s; }
        .mini-card:hover { background: rgba(255,255,255,0.07); transform: translateY(-2px); border-color: rgba(255,255,255,0.14); }
        .mini-icon { width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
        .mini-icon svg { width: 20px; height: 20px; stroke: #fff; }
        .mini-icon.i-blue { background: rgba(14,165,233,0.15); }
        .mini-icon.i-gold { background: rgba(245,158,11,0.15); }
        .mini-icon.i-green { background: rgba(16,185,129,0.15); }
        .mini-icon.i-purple { background: rgba(168,85,247,0.15); }
        .mini-icon.i-red { background: rgba(239,68,68,0.15); }
        .mini-card h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
        .mini-card p { color: var(--text-muted); font-size: 0.8rem; line-height: 1.55; }
        
        /* Cases */
        .cases { background: var(--bg-light); }
        .case-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .case-card { background: var(--bg); border-radius: 20px; padding: 32px; box-shadow: 0 4px 16px rgba(0,0,0,0.04); border: 1px solid var(--border); transition: 0.3s; }
        .case-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
        .case-header { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
        .case-avatar { width: 52px; height: 52px; border-radius: 12px; background: var(--dark); display: flex; align-items: center; justify-content: center; color: var(--dark); font-weight: 800; font-size: 1rem; flex-shrink: 0; overflow: hidden; }
        .case-avatar img { width: 100%; height: 100%; object-fit: contain; display: block; }
        .case-title { font-size: 1.05rem; color: var(--dark); font-weight: 700; line-height: 1.4; }
        .case-meta { color: #64748b; font-size: 0.8rem; }
        .case-card p { color: #475569; font-size: 0.92rem; line-height: 1.8; margin-bottom: 16px; }
        .case-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; padding-top: 18px; border-top: 1px solid var(--border); }
        .case-stat { text-align: center; }
        .case-stat .num { font-size: 1.2rem; font-weight: 800; color: var(--dark); }
        .case-stat .label { font-size: 0.7rem; color: #64748b; }
        
        /* Brand Wall */
        .brand-wall { background: var(--bg-light); }
        .brand-wall .section-header.center { padding-top: 0; }
        .brand-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
        .brand-card { background: var(--bg); border-radius: 14px; overflow: hidden; border: 1px solid var(--border); transition: 0.25s; box-shadow: 0 2px 8px rgba(0,0,0,0.03); }
        .brand-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,0,0,0.08); border-color: rgba(255,215,0,0.35); }
        .brand-img { aspect-ratio: 1/1; overflow: hidden; background: #fff; display: flex; align-items: center; justify-content: center; padding: 16px; }
        .brand-img img { width: 100%; height: 100%; object-fit: contain; display: block; }
        .brand-name { padding: 12px 8px; text-align: center; font-size: 0.9rem; color: var(--dark); font-weight: 600; }
        @media (max-width: 1100px) { .brand-grid { grid-template-columns: repeat(4, 1fr); } }
        @media (max-width: 768px) { .brand-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; } .brand-name { font-size: 0.8rem; padding: 10px 6px; } .brand-img { padding: 10px; } }
        @media (max-width: 480px) { .brand-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; } }

        /* GEO 价格直答块 */
        .direct-answer { background: linear-gradient(135deg, rgba(255,215,0,0.12), rgba(255,215,0,0.04)); border: 1px solid rgba(255,215,0,0.4); border-radius: 14px; padding: 24px 28px; margin-bottom: 36px; }
        .direct-answer h2 { font-size: 1.25rem; margin-bottom: 12px; color: var(--dark); }
        .direct-answer p { font-size: 0.95rem; line-height: 1.85; color: #475569; margin-bottom: 8px; }
        .direct-answer .da-updated { font-size: 0.8rem; color: #94a3b8; margin: 10px 0 0; }
        .direct-answer .da-more { display: inline-block; margin-top: 10px; font-weight: 600; color: #b8860b; }

        /* GEO 价格对比表 */
        .price-table { width: 100%; border-collapse: collapse; margin: 18px 0 10px; background: var(--bg); border-radius: 12px; overflow: hidden; box-shadow: 0 2px 10px rgba(10,22,40,0.06); }
        .price-table th, .price-table td { padding: 13px 16px; text-align: left; font-size: 0.9rem; border-bottom: 1px solid #f1f5f9; color: #334155; }
        .price-table th { background: var(--dark, #0a1628); color: #fff; font-weight: 600; white-space: nowrap; }
        .price-table tr:last-child td { border-bottom: none; }
        .price-table td b { color: #b8860b; }

        /* GEO 案例实名化：前后对照表 + 一手细节 + 图片占位 */
        .case-compare { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 0.85rem; background: var(--bg); border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
        .case-compare th, .case-compare td { padding: 9px 12px; text-align: left; border-bottom: 1px solid #f1f5f9; color: #475569; }
        .case-compare th { background: rgba(10,22,40,0.05); font-weight: 600; color: var(--dark); white-space: nowrap; }
        .case-compare tr:last-child td { border-bottom: none; }
        .case-compare .after { color: #b8860b; font-weight: 700; }
        .case-detail { font-size: 0.85rem; color: #64748b; line-height: 1.75; background: #f8fafc; border-left: 3px solid #b8860b; padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 12px 0 0; }
        .case-detail b { color: #475569; }
        .case-photo { margin-top: 14px; border: 1.5px dashed #cbd5e1; border-radius: 10px; padding: 6px; text-align: center; color: #94a3b8; font-size: 0.82rem; background: #fafafa; }
        .case-photo img { width: 100%; height: auto; display: block; border-radius: 8px; }
        @media (max-width: 768px) {
            .direct-answer { padding: 18px 16px; }
            .price-table th, .price-table td { padding: 9px 10px; font-size: 0.8rem; }
            .case-compare th, .case-compare td { padding: 8px 10px; font-size: 0.78rem; }
        }
        
        /* Demo */
        .demo-section { background: var(--bg-light); }
        .demo-wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
        .demo-media { position: relative; border-radius: 18px; overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,0.12); border: 1px solid var(--border); background: var(--bg); }
        .demo-media img { width: 100%; height: auto; display: block; }
        .demo-play { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); background: rgba(255,215,0,0.95); color: #0a1628; width: 80px; height: 80px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; box-shadow: 0 8px 24px rgba(0,0,0,0.25); transition: 0.2s; }
        .demo-play:hover { transform: translate(-50%, -50%) scale(1.05); }
        .demo-play svg { width: 28px; height: 28px; }
        .demo-play span { font-size: 0.7rem; font-weight: 700; }
        .demo-body { padding: 10px 0; }
        .demo-list { list-style: none; display: flex; flex-direction: column; gap: 24px; margin-bottom: 28px; }
        .demo-list li { display: flex; gap: 16px; }
        .demo-list li span { width: 36px; height: 36px; border-radius: 10px; background: var(--dark); color: var(--accent-gold); font-weight: 800; font-size: 0.85rem; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
        .demo-list li strong { display: block; color: var(--dark); font-size: 1.05rem; margin-bottom: 4px; }
        .demo-list li p { color: #475569; font-size: 0.9rem; line-height: 1.7; margin: 0; }
        .demo-cta { display: inline-flex; }
        
        /* Tech */
        .tech-section { background: linear-gradient(135deg, #0a1628 0%, #132744 100%); position: relative; overflow: hidden; }
        .tech-section::before { content: ''; position: absolute; top: -30%; right: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%); }
        .tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; position: relative; z-index: 2; }
        .tech-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; padding: 36px 28px; text-align: center; }
        .tech-card .icon { width: 60px; height: 60px; margin: 0 auto 20px; border-radius: 50%; background: rgba(255,215,0,0.1); border: 1px solid rgba(255,215,0,0.2); display: flex; align-items: center; justify-content: center; }
        .tech-card .icon svg { width: 28px; height: 28px; stroke: var(--accent-gold); }
        .tech-card h3 { color: #fff; font-size: 1.15rem; margin-bottom: 12px; }
        .tech-card p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; }
        
        /* FAQ */
        .faq-section { background: var(--bg-light); }
        .faq-grid { display: grid; grid-template-columns: 0.38fr 0.62fr; gap: 60px; }
        .faq-list { display: flex; flex-direction: column; gap: 14px; }
        .faq-item { background: var(--bg); border-radius: 12px; border: 1px solid var(--border); overflow: hidden; }
        .faq-question { padding: 18px 22px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; color: var(--dark); font-size: 0.98rem; gap: 16px; }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
        .faq-answer-inner { padding: 0 22px 18px; color: #475569; line-height: 1.8; font-size: 0.95rem; }
        .faq-item.active .faq-answer { max-height: 300px; }
        .faq-toggle { font-size: 1.4rem; color: var(--accent-gold); transition: 0.3s; flex-shrink: 0; line-height: 1; }
        .faq-item.active .faq-toggle { transform: rotate(45deg); }
        
        /* Contact */
        .contact { background: linear-gradient(135deg, #0a1628 0%, #163056 100%); text-align: center; position: relative; overflow: hidden; }
        .contact::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(circle at 50% 50%, rgba(0,212,255,0.1) 0%, transparent 50%); }
        .contact .container { position: relative; z-index: 2; }
        .contact h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
        .contact > .container > p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 48px; }
        .contact-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 760px; margin: 0 auto 40px; }
        .contact-card { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); border-radius: 16px; padding: 32px 20px; }
        .contact-card .icon { width: 48px; height: 48px; margin: 0 auto 16px; border-radius: 12px; background: rgba(255,215,0,0.1); display: flex; align-items: center; justify-content: center; }
        .contact-card .icon svg { width: 24px; height: 24px; stroke: var(--accent-gold); }
        .contact-card .label { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 8px; }
        .contact-card .value { color: #fff; font-size: 1.2rem; font-weight: 700; }
        .contact-card .value a { color: #fff; }
        .contact-card .value a:hover { color: var(--accent-gold); }
        
        /* Footer */
        footer { background: #070f1c; color: #94a3b8; padding: 60px 0 24px; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; margin-bottom: 48px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.8; margin-top: 16px; color: #94a3b8; }
        .footer-links h4 { color: #fff; margin-bottom: 18px; font-size: 1rem; }
        .footer-links li { margin-bottom: 12px; }
        .footer-address { font-style: normal; }
        .footer-address .c-label { color: var(--text-muted); }
        .footer-address ul { margin: 0; padding: 0; }
        .footer-links a { opacity: 0.8; transition: 0.2s; font-size: 0.9rem; }
        .footer-links a:hover { opacity: 1; color: var(--accent-gold); }
        .copyright { text-align: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.85rem; }
        
        /* Solutions (Service Matrix) */
        .solutions { background: var(--bg); }
        .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .service-card { background: var(--bg); border: 1px solid var(--border); border-radius: 16px; padding: 32px; transition: 0.3s; position: relative; overflow: hidden; }
        .service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent-gold), #ffb700); opacity: 0; transition: 0.3s; }
        .service-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
        .service-card:hover::before { opacity: 1; }
        .service-num { font-size: 0.8rem; font-weight: 800; color: var(--accent-gold); letter-spacing: 1px; margin-bottom: 12px; }
        .service-icon { width: 52px; height: 52px; border-radius: 12px; margin-bottom: 18px; display: flex; align-items: center; justify-content: center; }
        .service-icon svg { width: 26px; height: 26px; stroke: #fff; }
        .service-card h3 { font-size: 1.1rem; color: var(--dark); margin-bottom: 10px; }
        .service-card p { color: #475569; font-size: 0.92rem; line-height: 1.75; }
        .service-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
        .service-tag { background: #f1f5f9; color: #475569; padding: 4px 10px; border-radius: 4px; font-size: 0.75rem; }
        
        /* Partners */
        .partners { background: var(--bg-light); }
        .partner-group-title { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin: 0 0 20px; display: flex; align-items: center; gap: 10px; }
        .partner-group-title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-gold); }
        .partner-group { margin-bottom: 44px; }
        .partner-group:last-child { margin-bottom: 0; }
        .partner-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
        .partner-card { display: flex; align-items: center; gap: 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 14px; padding: 20px 18px; transition: 0.3s; }
        .partner-card:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(0,0,0,0.07); border-color: #cbd5e1; }
        .partner-logo { width: 48px; height: 48px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: #fff; font-weight: 800; font-size: 1.1rem; }
        .partner-name { font-weight: 700; color: var(--dark); font-size: 0.95rem; }
        .partner-desc { font-size: 0.75rem; color: #64748b; line-height: 1.5; margin-top: 2px; }
        .partner-note { margin-top: 28px; text-align: center; color: #94a3b8; font-size: 0.82rem; }
        
        /* Certificates */
        .cert-section { background: linear-gradient(135deg, #0a1628 0%, #132744 100%); position: relative; overflow: hidden; }
        .cert-section::before { content: ''; position: absolute; top: -30%; left: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(255,215,0,0.07) 0%, transparent 70%); }
        .cert-section .section-subtitle { color: var(--text-muted); }
        .cert-badges { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; position: relative; z-index: 2; margin-bottom: 48px; }
        .cert-badge { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; padding: 28px 24px; text-align: center; }
        .cert-badge .icon { width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%; background: rgba(255,215,0,0.1); border: 1px solid rgba(255,215,0,0.25); display: flex; align-items: center; justify-content: center; }
        .cert-badge .icon svg { width: 26px; height: 26px; stroke: var(--accent-gold); }
        .cert-badge h3 { color: #fff; font-size: 1.05rem; margin-bottom: 8px; }
        .cert-badge p { color: var(--text-muted); font-size: 0.85rem; line-height: 1.6; }
        
        /* Cert Gallery (certificate images) */
        .cert-gallery { position: relative; z-index: 2; margin-bottom: 48px; }
        .cert-gallery-title { color: #fff; font-size: 1.2rem; font-weight: 700; text-align: center; margin-bottom: 8px; }
        .cert-gallery-sub { color: var(--text-muted); font-size: 0.9rem; text-align: center; margin-bottom: 24px; }
        .cert-featured { display: grid; grid-template-columns: 1.25fr 1fr; gap: 0; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; overflow: hidden; margin-bottom: 20px; cursor: zoom-in; transition: 0.3s; }
        .cert-featured:hover { border-color: rgba(255,215,0,0.45); transform: translateY(-3px); }
        .cert-featured .cf-img { padding: 18px; background: rgba(255,255,255,0.07); display: flex; align-items: center; justify-content: center; }
        .cert-featured .cf-img img { width: 100%; border-radius: 8px; display: block; }
        .cert-featured .cf-body { padding: 30px 28px; display: flex; flex-direction: column; justify-content: center; gap: 12px; }
        .cert-featured .cf-tag { align-self: flex-start; background: linear-gradient(135deg, #f59e0b, #eab308); color: #0a1628; font-size: 0.75rem; font-weight: 700; padding: 4px 12px; border-radius: 20px; }
        .cert-featured h4 { color: #fff; font-size: 1.3rem; }
        .cert-featured p { color: var(--text-muted); font-size: 0.88rem; line-height: 1.7; }
        .cert-featured .cf-num { color: rgba(255,215,0,0.9); font-size: 0.85rem; font-weight: 600; }
        .cert-featured .cf-view { color: var(--accent); font-size: 0.85rem; display: inline-flex; align-items: center; gap: 6px; }
        .cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
        .cert-img-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; overflow: hidden; cursor: zoom-in; transition: 0.3s; }
        .cert-img-card:hover { transform: translateY(-3px); border-color: rgba(0, 212, 255, 0.5); box-shadow: 0 12px 30px rgba(0,0,0,0.3); }
        .cert-img-card .ci-img { padding: 12px; background: rgba(255,255,255,0.07); }
        .cert-img-card .ci-img img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; display: block; }
        .cert-img-card .ci-meta { padding: 14px; }
        .cert-img-card h5 { color: #fff; font-size: 0.92rem; font-weight: 600; margin-bottom: 4px; }
        .cert-img-card p { color: var(--text-muted); font-size: 0.78rem; line-height: 1.5; }
        .cert-img-card .ci-num { color: rgba(255,215,0,0.85); font-size: 0.75rem; font-weight: 600; margin-top: 6px; }
        .cert-img-card .ci-view { color: var(--accent); font-size: 0.8rem; margin-top: 8px; display: inline-flex; align-items: center; gap: 4px; }
        
        /* Tech & Cert sections: white text */
        .features-dark .section-title,
        .tech-section .section-title,
        .tech-section .section-subtitle,
        .tech-card p,
        .cert-section .section-title,
        .cert-section .section-subtitle,
        .cert-badge p,
        .cert-featured p,
        .cert-img-card p,
        .cert-gallery-sub { color: #fff; }
        
        /* Lightbox */
        .lightbox { display: none; position: fixed; inset: 0; background: rgba(2, 10, 20, 0.94); z-index: 9999; align-items: center; justify-content: center; padding: 48px 24px; }
        .lightbox.open { display: flex; }
        .lightbox img { max-width: 94vw; max-height: 86vh; border-radius: 8px; box-shadow: 0 24px 80px rgba(0,0,0,0.6); }
        .lightbox .lb-close { position: fixed; top: 22px; right: 30px; width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); color: #fff; font-size: 22px; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: 0.3s; }
        .lightbox .lb-close:hover { background: rgba(255,255,255,0.25); transform: rotate(90deg); }
        .lightbox .lb-caption { position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%); color: #fff; font-size: 0.92rem; background: rgba(255,255,255,0.08); padding: 8px 18px; border-radius: 20px; white-space: nowrap; max-width: 90vw; overflow: hidden; text-overflow: ellipsis; }
        
        /* ========== MOBILE RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 40px; }
            .hero-visual { height: 360px; order: -1; }
            .feature-grid, .case-list, .tech-grid { grid-template-columns: repeat(2, 1fr); }
            .mini-grid { grid-template-columns: repeat(2, 1fr); }
            .service-grid { grid-template-columns: repeat(2, 1fr); }
            .cert-badges { grid-template-columns: repeat(3, 1fr); }
            .cert-grid { grid-template-columns: repeat(3, 1fr); }
            .cert-featured { grid-template-columns: 1fr; }
            .cert-featured .cf-body { padding: 24px; }
            .scenario-grid { grid-template-columns: repeat(3, 1fr); }
            .faq-grid { grid-template-columns: 0.45fr 0.55fr; gap: 40px; }
            .about-stats { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .trust-inner { gap: 24px; }
            .demo-wrap { grid-template-columns: 1fr; gap: 36px; }
        }
        
        @media (max-width: 768px) {
            html { font-size: 15px; }
            section { padding: 64px 0; }
            .container { padding: 0 16px; }
            
            /* Mobile Nav */
            .nav-links { display: none; }
            .mobile-menu-toggle { display: flex; }
            .nav { height: 60px; }
            .logo { font-size: 1.15rem; }
            .logo-icon { width: 34px; height: 34px; }
            .mobile-menu { top: 60px; }
            
            /* Hero Mobile */
            .hero { padding: 100px 0 60px; }
            .hero h1 { font-size: 2.2rem; text-align: center; }
            .hero-desc { font-size: 1rem; text-align: center; }
            .hero-actions { justify-content: center; flex-direction: column; }
            .hero-actions .btn { width: 100%; }
            .hero-badges { justify-content: center; }
            .hero-visual { height: 280px; }
            .floating-card { padding: 12px 16px; }
            .floating-card.pos1 { top: 5%; left: 0; }
            .floating-card.pos2 { top: 40%; right: 0; }
            .floating-card.pos3 { bottom: 8%; left: 5%; }
            .floating-card .num { font-size: 1.1rem; }
            .floating-card .txt { font-size: 0.7rem; }
            .trust-inner { flex-direction: column; gap: 10px; }
            .trust-item { font-size: 0.9rem; }
            .cta-hint { text-align: center; }
            
            /* About Mobile */
            .about-wrap { padding-bottom: 64px; }
            .about-card { padding: 28px 20px; margin-top: 0; border-radius: 20px; }
            .about-card h2 { font-size: 1.5rem; }
            .about-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 28px; padding-top: 28px; }
            .about-stat .num { font-size: 1.5rem; }
            
            /* Section Headers Mobile */
            .section-title { font-size: 1.7rem; }
            .section-subtitle { font-size: 0.95rem; }
            .section-header { margin-bottom: 36px; }
            
            /* Scenarios Mobile */
            .scenario-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .scenario-card { padding: 20px 10px; }
            .scenario-icon { width: 44px; height: 44px; }
            .scenario-icon svg { width: 24px; height: 24px; }
            .scenario-card h3 { font-size: 0.85rem; }
            
            /* Features Mobile */
            .feature-grid { grid-template-columns: 1fr; gap: 16px; }
            .feature-item { padding: 24px; }
            .feature-icon { width: 48px; height: 48px; margin-bottom: 16px; }
            .feature-item h3 { font-size: 1.05rem; }
            .feature-group { padding: 20px; }
            .feature-group-head { flex-wrap: wrap; gap: 12px; }
            .feature-group-meta { min-width: calc(100% - 130px); }
            .mini-grid { grid-template-columns: 1fr; gap: 10px; }
            
            /* Demo Mobile */
            .demo-list { gap: 18px; }
            .demo-list li span { width: 32px; height: 32px; font-size: 0.8rem; }
            .demo-play { width: 64px; height: 64px; }
            .demo-play svg { width: 24px; height: 24px; }
            .demo-play span { display: none; }
            
            /* Cases Mobile */
            .case-list { grid-template-columns: 1fr; gap: 16px; }
            .case-card { padding: 24px; }
            
            /* Tech Mobile */
            .tech-grid { grid-template-columns: 1fr; gap: 16px; }
            .tech-card { padding: 28px 20px; }
            
            /* Solutions Mobile */
            .service-grid { grid-template-columns: 1fr; gap: 16px; }
            .service-card { padding: 24px; }
            .service-icon { width: 48px; height: 48px; margin-bottom: 16px; }
            .service-card h3 { font-size: 1.05rem; }
            
            /* Partners Mobile */
            .partner-grid { grid-template-columns: 1fr; gap: 12px; }
            .partner-group { margin-bottom: 32px; }
            
            /* Certificates Mobile */
            .cert-badges { grid-template-columns: 1fr; gap: 14px; margin-bottom: 36px; }
            .cert-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
            .cert-gallery { margin-bottom: 36px; }
            .cert-featured .cf-body { padding: 20px; }
            .lightbox { padding: 60px 14px 70px; }
            .lightbox .lb-caption { font-size: 0.8rem; padding: 6px 14px; }
            
            /* FAQ Mobile */
            .faq-grid { grid-template-columns: 1fr; gap: 28px; }
            .faq-question { padding: 16px 18px; font-size: 0.92rem; }
            .faq-answer-inner { padding: 0 18px 16px; }
            
            /* Contact Mobile */
            .contact h2 { font-size: 1.8rem; }
            .contact-cards { grid-template-columns: 1fr; gap: 14px; }
            .contact-card { padding: 24px 16px; }
            .contact-card .value { font-size: 1.1rem; }
            .contact .btn { width: 100%; }
            
            /* Footer Mobile */
            .footer-grid { grid-template-columns: 1fr; gap: 32px; margin-bottom: 32px; }
            .footer-links h4 { margin-bottom: 14px; }
        }

        /* 软著证书保持一排三个，仅超小屏降为单列 */
        @media (max-width: 560px) {
            .cert-grid { grid-template-columns: 1fr; }
        }
/* ===== Pricing Section ===== */
.pricing-section { padding: 80px 0; background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%); }
.pricing-section .section-subtitle { max-width: 720px; margin: 0 auto; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; align-items: stretch; }
.price-card { background: #fff; border: 1px solid #e5e7eb; border-radius: 16px; padding: 32px 28px; position: relative; transition: all 0.3s ease; display: flex; flex-direction: column; }
.price-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(15,23,42,0.08); border-color: #d4af37; }
.price-card-featured { border: 2px solid #d4af37; box-shadow: 0 12px 28px rgba(212,175,55,0.18); background: linear-gradient(180deg, #fffdf3 0%, #fff 50%); transform: scale(1.04); }
.price-card-featured:hover { transform: scale(1.04) translateY(-4px); }
.price-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: linear-gradient(135deg, #d4af37, #b8941f); color: #fff; padding: 6px 18px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.5px; white-space: nowrap; }
.price-head h3 { font-size: 1.5rem; color: #0f172a; margin: 0 0 4px; font-weight: 700; }
.price-tagline { color: #64748b; font-size: 0.88rem; margin: 0 0 22px; }
.price-num { display: flex; align-items: baseline; gap: 4px; margin-bottom: 8px; }
.price-num .currency { font-size: 1.1rem; color: #0f172a; font-weight: 600; }
.price-num strong { font-size: 2.6rem; color: #0f172a; font-weight: 700; line-height: 1; }
.price-card-featured .price-num strong { color: #b8941f; }
.price-num .unit { color: #64748b; font-size: 0.9rem; }
.price-renew { font-size: 0.86rem; color: #64748b; margin: 0 0 8px; display: flex; align-items: baseline; gap: 5px; flex-wrap: wrap; }
.price-renew .renew-badge { background: #fff7e0; border: 1px solid #ecd9a0; color: #b8941f; font-size: 0.72rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; letter-spacing: 0.5px; }
.price-renew b { font-size: 1.18rem; color: #b8941f; font-weight: 700; line-height: 1; }
.price-ideal { color: #475569; font-size: 0.85rem; margin: 0 0 20px; padding-bottom: 16px; border-bottom: 1px dashed #e5e7eb; }
.price-features { list-style: none; padding: 0; margin: 0 0 28px; flex: 1; }
.price-features li { color: #334155; font-size: 0.92rem; line-height: 1.7; padding-left: 22px; position: relative; }
.price-features li::before { content: "\2713"; position: absolute; left: 0; top: 0; color: #94a3b8; font-weight: 600; }
.price-features li.star::before { content: "\2605"; color: #d4af37; }
.price-features li.check { color: #0f172a; font-weight: 500; }
.price-features li b { color: #0f172a; font-weight: 600; }
.price-card .btn { width: 100%; text-align: center; display: inline-block; padding: 12px 20px; box-sizing: border-box; }
.price-card .btn-outline { border: 1px solid #d4af37; color: #b8941f; background: #fff; }
.price-card .btn-outline:hover { background: #d4af37; color: #fff; }
.modules-block { margin-top: 80px; }
.modules-title { text-align: center; font-size: 1.4rem; color: #0f172a; margin: 0 0 8px; font-weight: 700; }
.modules-sub { text-align: center; color: #64748b; font-size: 0.95rem; margin: 0 0 32px; }
.modules-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.module-item { background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; padding: 22px 22px; transition: all 0.2s; }
.module-item:hover { border-color: #d4af37; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15,23,42,0.06); }
.module-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; gap: 12px; }
.module-head h4 { font-size: 1.05rem; color: #0f172a; margin: 0; font-weight: 600; }
.module-price { font-size: 0.88rem; color: #b8941f; font-weight: 700; white-space: nowrap; background: #fffbef; padding: 2px 10px; border-radius: 6px; }
.module-item p { color: #64748b; font-size: 0.88rem; line-height: 1.65; margin: 0; }
.chain-block { margin-top: 80px; padding: 44px 36px; background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); border-radius: 18px; color: #fff; }
.chain-block .modules-title { color: #fff; }
.chain-block .modules-sub { color: rgba(255,255,255,0.7); }
.chain-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 32px; }
.chain-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.12); border-radius: 14px; padding: 26px 24px; transition: all 0.2s; }
.chain-card:hover { background: rgba(255,255,255,0.07); border-color: #d4af37; }
.chain-card h4 { color: #d4af37; font-size: 1.25rem; margin: 0 0 4px; font-weight: 700; }
.chain-card p { color: rgba(255,255,255,0.7); font-size: 0.88rem; margin: 0 0 16px; }
.chain-card ul { list-style: none; padding: 0; margin: 0 0 22px; }
.chain-card li { color: rgba(255,255,255,0.85); font-size: 0.92rem; line-height: 1.85; padding-left: 18px; position: relative; }
.chain-card li::before { content: "\B7"; position: absolute; left: 4px; color: #d4af37; font-weight: 700; }
.chain-card .btn-outline-light { border: 1px solid rgba(255,255,255,0.3); color: #fff; background: transparent; display: inline-block; padding: 11px 24px; border-radius: 8px; text-decoration: none; transition: 0.2s; }
.chain-card .btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #d4af37; }
.chain-card .btn-primary { background: #d4af37; color: #0f172a; display: inline-block; padding: 11px 24px; border-radius: 8px; text-decoration: none; font-weight: 600; transition: 0.2s; }
.chain-card .btn-primary:hover { background: #b8941f; color: #fff; }
.pricing-foot { text-align: center; margin-top: 40px; color: #64748b; font-size: 0.88rem; line-height: 1.8; }
.pricing-foot p { margin: 0; }

/* ===== Pricing v2: 软硬拆开 ===== */
.step-block { margin-top: 4px; }
.step-num { display: flex; align-items: center; gap: 14px; padding: 14px 18px; background: linear-gradient(135deg, var(--dark, #0a1628), #26364d); border-radius: 12px; color: #fff; margin: 0 0 26px; flex-wrap: wrap; }
.step-num span { width: 34px; height: 34px; border-radius: 9px; background: var(--accent-gold, #FFD700); color: var(--dark, #0a1628); font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 0.95rem; flex-shrink: 0; }
.step-num b { font-size: 1.1rem; white-space: nowrap; }
.step-num em { font-style: normal; color: rgba(255,255,255,0.62); font-size: 0.86rem; line-height: 1.5; }
.hardware-title { background: linear-gradient(135deg, #7a4f0e 0%, #a06a12 55%, #c98a1b 100%); }
.hardware-block { margin-top: 76px; }
.step-note { text-align: center; color: #6b7280; font-size: 0.88rem; margin: 22px 0 0; line-height: 1.8; }
.step-note b { color: var(--dark, #0f172a); }
.hardware-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.hw-card { background: #fff; border: 1px solid #e5e7eb; border-radius: 14px; padding: 22px 20px; position: relative; transition: all 0.25s ease; display: flex; flex-direction: column; }
.hw-card:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(0,0,0,0.08); border-color: var(--accent-gold, #FFD700); }
.hw-icon { display: flex; align-items: center; justify-content: center; width: 52px; height: 52px; margin-bottom: 14px; border-radius: 14px; background: linear-gradient(135deg, rgba(0,212,255,0.14), rgba(0,212,255,0.05)); color: var(--accent, #00d4ff); transition: all 0.25s ease; overflow: hidden; }
.hw-icon svg { width: 27px; height: 27px; display: block; }
.hw-icon img { width: 100%; height: 100%; object-fit: cover; display: block; border-radius: inherit; }
.hw-card:hover .hw-icon { background: linear-gradient(135deg, rgba(0,212,255,0.22), rgba(0,212,255,0.08)); box-shadow: 0 4px 14px rgba(0,212,255,0.18); }
.hw-card h4 { font-size: 1.06rem; color: var(--dark, #0f172a); margin: 0 0 6px; font-weight: 700; }
.hw-card p { font-size: 0.85rem; color: #6b7280; line-height: 1.6; margin: 0 0 16px; flex: 1; }
.hw-price { font-size: 1.5rem; font-weight: 800; color: var(--dark, #0f172a); line-height: 1; }
.hw-price span { font-size: 0.85rem; font-weight: 500; color: #9ca3af; margin-left: 2px; }
.hw-tag { position: absolute; top: 14px; right: 14px; font-style: normal; font-size: 0.7rem; color: var(--accent-gold, #B8860B); background: #fff8e6; border: 1px solid rgba(212,175,55,0.35); padding: 2px 8px; border-radius: 999px; font-weight: 600; }
.hw-card-cta { justify-content: center; align-items: center; text-align: center; background: linear-gradient(135deg, var(--dark, #0a1628), #2c3e50); border: none; }
.hw-card-cta h4 { color: var(--accent-gold, #FFD700); font-size: 1.2rem; margin: 0 0 8px; line-height: 1.5; }
.hw-card-cta .cta-note { display: block; margin-top: 2px; font-size: 0.98rem; font-weight: 600; opacity: 0.94; letter-spacing: 0.02em; }
.hw-card-cta p { color: rgba(255,255,255,0.72); font-size: 0.9rem; }
.hw-card-cta .btn-primary { background: var(--accent-gold, #FFD700); color: var(--dark, #0a1628); display: inline-block; padding: 12px 26px; border-radius: 9px; text-decoration: none; font-weight: 700; transition: 0.2s; }
.hw-card-cta .btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
@media (max-width: 900px) {
    .hardware-grid { grid-template-columns: 1fr 1fr; }
    .step-num em { width: 100%; padding-left: 48px; }
    .hw-card-cta { grid-column: span 2; }
}
@media (max-width: 560px) {
    .hardware-grid { grid-template-columns: 1fr; }
    .hw-card-cta { grid-column: span 1; }
}

@media (max-width: 900px) {
    .pricing-grid { grid-template-columns: 1fr; gap: 20px; }
    .price-card-featured { transform: none; }
    .price-card-featured:hover { transform: translateY(-4px); }
    .modules-grid { grid-template-columns: 1fr; }
    .chain-grid { grid-template-columns: 1fr; }
    .chain-block { padding: 32px 20px; }
    .pricing-section { padding: 56px 0; }
    .modules-block, .chain-block { margin-top: 56px; }
}
    

/* ================= 子页面（preview-xxx.html）专用 ================= */
.page-hero {
    padding: 150px 0 56px;
    background: linear-gradient(135deg, #0a1628 0%, #0f2440 55%, #163056 100%);
    text-align: center; overflow: hidden; position: relative;
}
.page-hero .ph-crumb { color: rgba(255,255,255,.5); font-size: .85rem; margin-bottom: 12px; letter-spacing: .04em; }
.page-hero .ph-crumb a { color: var(--accent-gold); text-decoration: none; }
.page-hero h1 { font-size: 2.4rem; color: #fff; margin-bottom: 14px; line-height: 1.3; }
.page-hero .ph-sub { color: #b9c7da; max-width: 680px; margin: 0 auto; font-size: 1.05rem; line-height: 1.8; }
.nav-links a.active { color: var(--accent-gold) !important; }
.mobile-menu a.active { color: var(--accent-gold) !important; }

.rel-section { padding: 0 0 88px; }
.rel-section .section-header.center { padding-top: 88px; }

/* 子页面删除 section-header 后的紧凑布局 */
.pricing-section.section-no-header,
.tech-section.section-no-header,
.cases.section-no-header { padding-top: 36px; }
.rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 8px; }
.rel-card {
    display: block; padding: 26px 26px 22px; border: 1px solid var(--border); border-radius: 16px;
    background: #fff; text-decoration: none; color: var(--text);
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    box-shadow: 0 4px 18px rgba(10,22,40,.05);
}
.rel-card:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(10,22,40,.13); border-color: var(--accent-gold); }
.rel-card h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--dark); }
.rel-card p { font-size: .9rem; color: var(--text-muted); line-height: 1.7; margin: 0; }
.rel-go { display: inline-block; margin-top: 14px; color: var(--accent-gold); font-weight: 600; font-size: .9rem; }
@media (max-width: 900px) { .rel-grid { grid-template-columns: 1fr; } .rel-section .section-header.center { padding-top: 56px; } }
@media (max-width: 768px) { .page-hero { padding: 120px 0 40px; } .page-hero h1 { font-size: 1.8rem; } .rel-card { padding: 20px 18px 16px; }
  .pricing-section.section-no-header,
  .tech-section.section-no-header,
  .cases.section-no-header { padding-top: 24px; }
}

/* ================= 右下角悬浮客服条 ================= */
.float-actions {
    position: fixed;
    left: 24px;
    bottom: 90px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.float-avatar {
    position: relative;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    border: 3px solid #fff;
    background: #e2e8f0;
    box-shadow: 0 6px 20px rgba(10,22,40,0.16);
}
.float-avatar::before,
.float-avatar::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--accent-gold, #FFD700);
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.55;
    pointer-events: none;
    z-index: -1;
    animation: float-ring-pulse 1.8s ease-out infinite;
}
.float-avatar::after {
    animation-delay: 0.9s;
}
@keyframes float-ring-pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.55; }
    100% { transform: translate(-50%, -50%) scale(1.7); opacity: 0; }
}
.float-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 50%;
}
.float-avatar .online-dot {
    position: absolute;
    bottom: 2px;
    left: 2px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: #22c55e;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
    z-index: 2;
}
.float-btns {
    display: flex;
    flex-direction: column;
    width: 66px;
    background: #fff;
    border-radius: 34px;
    overflow: hidden;
    box-shadow: 0 6px 24px rgba(10,22,40,0.12);
}
.float-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 15px 5px;
    color: #1e293b;
    text-decoration: none;
    font-size: 13px;
    line-height: 1.2;
    background: #fff;
    border: none;
    border-bottom: 1px solid #f1f5f9;
    cursor: pointer;
    transition: all .2s ease;
    width: 100%;
}
.float-btn:last-child { border-bottom: none; }
.float-btn:hover { background: #fffbe6; color: var(--accent-gold, #FFD700); }
.float-btn svg {
    width: 24px;
    height: 24px;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
    stroke: currentColor;
}
@media (max-width: 768px) {
    .float-actions {
        left: 10px;
        right: auto;
        bottom: 10px;
        flex-direction: row;
        align-items: center;
        gap: 8px;
    }
    .float-avatar { width: 46px; height: 46px; border-width: 2px; }
    .float-avatar .online-dot { width: 10px; height: 10px; bottom: 1px; left: 1px; border-width: 1.5px; }
    .float-btns {
        flex-direction: row;
        width: auto;
        border-radius: 24px;
        padding: 3px 4px;
        gap: 2px;
    }
    .float-btn {
        flex-direction: row;
        gap: 3px;
        padding: 8px 12px;
        font-size: 11px;
        border-bottom: none;
        border-right: 1px solid #f1f5f9;
        border-radius: 20px;
        white-space: nowrap;
    }
    .float-btn:last-child { border-right: none; }
    .float-btn svg { width: 18px; height: 18px; }
}