/* ===== 全局重置 ===== */
        *{margin:0;padding:0;box-sizing:border-box}
        :root{--brand:#0055cc;--brand-dark:#0044a8;--brand-light:#e8f0fe;--title:#0c2137;--body:#3a5f83;--muted:#6a8ab0;--bg:#ffffff;--bg-alt:#f8fcff;--radius:40px;--radius-sm:24px;--shadow:0 8px 28px rgba(0,85,204,0.15);--shadow-hover:0 12px 40px rgba(0,85,204,0.25);--transition:0.25s ease}
        html{scroll-behavior:smooth}
        body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:var(--body);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
        a{text-decoration:none;color:inherit}
        img{display:block;max-width:100%;height:auto}

        /* ===== 容器统一 ===== */
        .container,
        .nav-inner {
            width: 92%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 16px;
            box-sizing: border-box;
        }
        @media (min-width: 768px) {
            .container,
            .nav-inner {
                width: 90%;
                padding: 0 24px;
            }
        }
        @media (min-width: 1024px) {
            .container,
            .nav-inner {
                width: 85%;
                padding: 0 40px;
            }
        }

        .section-title{font-size:2.4rem;font-weight:700;color:var(--title);text-align:center;margin-bottom:0.5rem}
        .section-sub{text-align:center;color:var(--muted);font-size:1.1rem;margin-bottom:2.5rem}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:0.6rem;padding:0.85rem 2.2rem;border-radius:var(--radius);font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:all var(--transition);background:var(--bg);color:var(--title);box-shadow:0 2px 8px rgba(0,0,0,0.04)}
        .btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow)}
        .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);background:var(--brand-dark)}
        .btn-outline{background:transparent;color:var(--brand);border:2px solid var(--brand)}
        .btn-outline:hover{transform:translateY(-2px);background:var(--brand);color:#fff}
        .btn-sm{padding:0.5rem 1.4rem;font-size:0.9rem;border-radius:var(--radius-sm)}
        .badge-free{display:inline-block;background:#22c55e;color:#fff;font-size:0.65rem;font-weight:700;padding:0.1rem 0.8rem;border-radius:40px;margin-left:0.4rem;vertical-align:middle}

        /* ===== 导航（已修复错位） ===== */
        .navbar{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,85,204,0.06);padding:0.6rem 0;transition:box-shadow var(--transition)}
        .navbar.scrolled{box-shadow:0 4px 20px rgba(0,0,0,0.06)}
        .nav-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:nowrap}
        .nav-logo{flex-shrink:0}
        .nav-logo img{display:block;height:32px;width:auto}
        .nav-links{display:flex;align-items:center;gap:1.2rem;list-style:none;font-weight:500;flex-shrink:0}
        .nav-links a{font-size:0.9rem;color:var(--body);position:relative;padding:0.25rem 0;white-space:nowrap}
        .nav-links a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--brand);transition:width var(--transition)}
        .nav-links a:hover::after{width:100%}
        .nav-links a:hover{color:var(--brand)}
        .nav-links .highlight a{color:var(--brand);font-weight:700}
        .nav-links .highlight a::after{width:100%}
        .nav-download-btn{flex-shrink:0;margin-left:0.2rem}
        .hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:transparent;border:none;flex-shrink:0}
        .hamburger span{display:block;width:26px;height:3px;background:var(--title);border-radius:4px;transition:all var(--transition)}
        .hamburger.active span:nth-child(1){transform:rotate(45deg)translate(5px,5px)}
        .hamburger.active span:nth-child(2){opacity:0}
        .hamburger.active span:nth-child(3){transform:rotate(-45deg)translate(5px,-5px)}

        @media (max-width: 992px) {
            .nav-links{gap:0.8rem}
            .nav-links a{font-size:0.82rem}
        }

        @media (max-width: 768px) {
            .nav-inner{flex-wrap:wrap}
            .nav-links{display:none;flex-direction:column;width:100%;padding:0.8rem 0 0.4rem;gap:0.2rem;border-top:1px solid rgba(0,85,204,0.06);margin-top:0.6rem;flex-shrink:0}
            .nav-links.open{display:flex}
            .nav-links a{font-size:0.95rem;padding:0.4rem 0;white-space:normal}
            .hamburger{display:flex}
            .nav-download-btn{display:none}
        }

        /* ===== HERO ===== */
        .hero{padding:3rem 0 5rem;background:var(--bg-alt)}
        .hero-grid{display:flex;align-items:center;gap:4rem}
        .hero-left{flex:1.1}
        .hero-badge{display:inline-block;background:var(--brand-light);color:var(--brand);font-weight:600;font-size:0.85rem;padding:0.3rem 1.2rem;border-radius:40px;margin-bottom:1rem}
        .hero h1{font-size:3.2rem;font-weight:800;color:var(--title);line-height:1.15;margin-bottom:1rem;letter-spacing:-0.02em}
        .hero h1 span{color:var(--brand)}
        .hero p{font-size:1.05rem;color:var(--body);max-width:520px;margin-bottom:1.8rem;line-height:1.8}
        .hero-actions{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:2rem}
        .hero-platforms{display:flex;gap:1.2rem;color:var(--muted);font-size:0.9rem;font-weight:500}
        .hero-platforms i{font-size:1.2rem;color:var(--brand);margin-right:0.3rem}
        .hero-right{flex:1;display:flex;justify-content:center;align-items:center}
        .hero-img{max-width:100%;border-radius:var(--radius);box-shadow:var(--shadow);animation:float 3s ease-in-out infinite;width:500px}
        @keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
        .hero-desc{padding-left:1rem;border-left:3px solid var(--brand);margin-bottom:1.5rem}
        .hero-desc p{font-size:0.95rem;color:var(--body);line-height:1.8;margin-bottom:0.6rem}
        @media (max-width:768px){
            .hero-grid{flex-direction:column;gap:2rem}
            .hero h1{font-size:2.2rem}
            .hero-right{order:-1}
            .hero-img{max-width:300px;width:100%}
        }
        @media (max-width:480px){
            .hero{padding:2rem 0 3rem}
            .hero h1{font-size:1.8rem}
            .hero p{font-size:0.95rem}
            .hero-actions .btn{width:100%;justify-content:center}
            .hero-platforms{flex-wrap:wrap;gap:0.6rem 1rem;font-size:0.8rem}
        }

        /* ===== 六大卖点（改为稳定性相关） ===== */
        .selling{padding:5rem 0;background:var(--bg)}
        .selling-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.8rem;margin-top:1rem}
        .selling-item{background:var(--bg-alt);border-radius:var(--radius-sm);padding:2.2rem 2rem;border:1px solid rgba(0,85,204,0.04);transition:all var(--transition);text-align:center}
        .selling-item:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
        .selling-item .icon{font-size:2.2rem;color:var(--brand);margin-bottom:0.6rem}
        .selling-item h3{font-size:1.1rem;font-weight:700;color:var(--title);margin-bottom:0.4rem}
        .selling-item p{font-size:0.92rem;color:var(--body);line-height:1.8}
        @media (max-width:768px){.selling-grid{grid-template-columns:1fr 1fr}}
        @media (max-width:480px){.selling-grid{grid-template-columns:1fr}}

        /* ===== 创意版块：稳定性保障 ===== */
        .stability{padding:5rem 0;background:var(--bg-alt)}
        .stability-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:2rem;margin-top:1rem}
        .stability-item{background:var(--bg);border-radius:var(--radius-sm);padding:2rem;border-left:4px solid var(--brand);transition:all var(--transition)}
        .stability-item:hover{box-shadow:var(--shadow-hover);transform:translateX(4px)}
        .stability-item .st-icon{font-size:1.6rem;color:var(--brand);margin-bottom:0.6rem}
        .stability-item h3{font-size:1.2rem;font-weight:700;color:var(--title);margin-bottom:0.5rem}
        .stability-item p{font-size:0.92rem;color:var(--body);line-height:1.8}
        @media (max-width:768px){.stability-grid{grid-template-columns:1fr}}
        @media (max-width:480px){.stability-item{padding:1.2rem 1rem}}

        /* ===== 适合人群 ===== */
        .audience{padding:4rem 0;background:var(--bg)}
        .audience-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.8rem;margin-top:1rem}
        .audience-item{background:var(--bg-alt);border-radius:var(--radius-sm);padding:2.2rem 2rem;border:1px solid rgba(0,85,204,0.04);transition:all var(--transition)}
        .audience-item:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
        .audience-item .icon{font-size:2.2rem;color:var(--brand);margin-bottom:0.6rem}
        .audience-item h3{font-size:1.1rem;font-weight:700;color:var(--title);margin-bottom:0.5rem}
        .audience-item p{font-size:0.92rem;color:var(--body);line-height:1.8}
        .audience-item .learn-more{display:inline-block;margin-top:0.6rem;font-size:0.85rem;font-weight:600;color:var(--brand)}
        .audience-item .learn-more:hover{color:var(--brand-dark);text-decoration:underline}
        @media (max-width:768px){.audience-grid{grid-template-columns:1fr 1fr}}
        @media (max-width:480px){.audience-grid{grid-template-columns:1fr}}

        /* ===== 定价 ===== */
        .pricing{padding:5rem 0;background:var(--bg)}
        .pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:1rem;align-items:stretch}
        .pricing-card{background:var(--bg);border-radius:var(--radius);padding:2.4rem 2rem 2.2rem;box-shadow:0 4px 16px rgba(0,0,0,0.04);border:1px solid rgba(0,85,204,0.06);transition:all var(--transition);text-align:center;display:flex;flex-direction:column;position:relative}
        .pricing-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
        .pricing-card.recommended{border-color:var(--brand);box-shadow:var(--shadow);transform:scale(1.02)}
        .pricing-card.recommended:hover{transform:scale(1.02)translateY(-4px)}
        .pricing-card.recommended .recommend-badge{position:absolute;top:-0.6rem;left:50%;transform:translateX(-50%);background:var(--brand);color:#fff;font-size:0.7rem;font-weight:700;padding:0.2rem 1.6rem;border-radius:40px;text-transform:uppercase;letter-spacing:0.5px}
        .pricing-card .plan-name{font-size:1.2rem;font-weight:700;color:var(--title);margin-bottom:0.2rem}
        .pricing-card .plan-desc{font-size:0.85rem;color:var(--muted);margin-bottom:0.8rem}
        .pricing-card .price{font-size:2.4rem;font-weight:800;color:var(--title);margin-bottom:0.1rem}
        .pricing-card .price small{font-size:0.9rem;font-weight:400;color:var(--muted)}
        .pricing-card .price .original{font-size:0.9rem;font-weight:400;color:#b0c4d9;text-decoration:line-through;margin-left:0.4rem}
        .pricing-card .plan-detail{font-size:0.88rem;color:var(--body);line-height:1.8;padding:0.8rem 0;border-top:1px solid rgba(0,85,204,0.06);margin:0.6rem 0 0.8rem;text-align:left}
        .pricing-card .features{list-style:none;text-align:left;margin:0.4rem 0 1.2rem;padding:0;flex:1}
        .pricing-card .features li{display:flex;align-items:center;gap:0.6rem;padding:0.2rem 0;font-size:0.88rem;color:var(--body)}
        .pricing-card .features li i{color:var(--brand);font-size:0.85rem;width:1.2rem;text-align:center}
        .pricing-card .btn{width:100%;justify-content:center}
        @media (max-width:768px){.pricing-grid{grid-template-columns:1fr 1fr;gap:1.2rem}.pricing-card.recommended{transform:scale(1)}.pricing-card.recommended:hover{transform:scale(1)translateY(-4px)}}
        @media (max-width:480px){.pricing-grid{grid-template-columns:1fr}.pricing-card{padding:1.4rem 1rem}}

        /* ===== 核心特点 ===== */
        .core{padding:5rem 0;background:var(--bg)}
        .core-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.8rem;margin-top:1rem}
        .core-item{background:var(--bg);border-radius:var(--radius-sm);padding:2.2rem 2rem;border:1px solid rgba(0,85,204,0.04);transition:all var(--transition)}
        .core-item:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow)}
        .core-item .icon{font-size:2.4rem;color:var(--brand);margin-bottom:0.8rem}
        .core-item h3{font-size:1.1rem;font-weight:700;color:var(--title);margin-bottom:0.4rem}
        .core-item p{font-size:0.92rem;color:var(--body);line-height:1.8}
        @media (max-width:768px){.core-grid{grid-template-columns:1fr 1fr}}
        @media (max-width:480px){.core-grid{grid-template-columns:1fr 1fr;gap:0.8rem}.core-item{padding:1rem}.core-item .icon{font-size:1.6rem}.core-item h3{font-size:0.9rem}.core-item p{font-size:0.8rem}}

        /* ===== 技术架构 ===== */
        .tech-arch{padding:5rem 0;background:var(--bg-alt)}
        .tech-arch-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:2rem;margin-top:1rem}
        .tech-arch-item{background:var(--bg);border-radius:var(--radius-sm);padding:2rem 2rem;border-left:4px solid var(--brand);transition:all var(--transition)}
        .tech-arch-item:hover{box-shadow:var(--shadow-hover);transform:translateX(4px)}
        .tech-arch-item .ti-header{display:flex;align-items:center;gap:0.8rem;margin-bottom:0.6rem}
        .tech-arch-item .ti-header .ti-icon{font-size:1.4rem;color:var(--brand);width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--brand-light);border-radius:12px;flex-shrink:0}
        .tech-arch-item .ti-header h3{font-size:1.1rem;font-weight:700;color:var(--title)}
        .tech-arch-item .ti-body p{font-size:0.92rem;color:var(--body);line-height:1.8;margin-bottom:0.4rem}
        .tech-arch-item .ti-body .tech-tag{display:inline-block;font-size:0.65rem;font-weight:600;color:var(--brand);background:rgba(0,85,204,0.08);padding:0.1rem 0.7rem;border-radius:40px;margin-right:0.3rem}
        .tech-arch-item .ti-body .tech-tag.light{background:rgba(0,85,204,0.04);color:var(--muted)}
        .tech-arch-item .ti-body .tech-tag .en{font-weight:400;letter-spacing:0.02em}
        @media (max-width:768px){.tech-arch-grid{grid-template-columns:1fr}}
        @media (max-width:480px){.tech-arch-item{padding:1.2rem 1rem}}

        /* ===== 下载中心 ===== */
        .download{padding:5rem 0;background:var(--bg-alt)}
        .download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.8rem;margin-top:1rem}
        .download-card{background:var(--bg);border-radius:var(--radius-sm);padding:1.8rem 1.2rem;text-align:center;box-shadow:0 4px 16px rgba(0,0,0,0.04);border:1px solid rgba(0,85,204,0.06);transition:all var(--transition);position:relative}
        .download-card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow)}
        .download-card .platform-icon{font-size:2.6rem;color:var(--brand);margin-bottom:0.4rem}
        .download-card h3{font-size:1.05rem;font-weight:700;color:var(--title);margin-bottom:0.1rem}
        .download-card .version{font-size:0.75rem;color:var(--muted);margin-bottom:0.3rem}
        .download-card .desc{font-size:0.8rem;color:var(--body);margin-bottom:0.8rem}
        .download-card .hot-tag{position:absolute;top:-0.5rem;right:1rem;background:#ff6b35;color:#fff;font-size:0.65rem;font-weight:700;padding:0.1rem 0.8rem;border-radius:40px}
        .download-card .btn{width:100%}
        @media (max-width:768px){.download-grid{grid-template-columns:repeat(2,1fr)}}
        @media (max-width:480px){.download-grid{grid-template-columns:1fr 1fr;gap:0.8rem}.download-card{padding:1rem 0.6rem}.download-card .platform-icon{font-size:2rem}}

        /* ===== 数据统计 ===== */
        .stats{padding:4rem 0;background:var(--bg)}
        .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
        .stats-item .number{font-size:2.8rem;font-weight:800;color:var(--title);line-height:1.1;position:relative;display:inline-block}
        .stats-item .number .source-mark{font-size:0.6rem;font-weight:400;color:var(--muted);vertical-align:super;margin-left:0.1rem;cursor:default}
        .stats-item .label{font-size:1rem;color:var(--muted);font-weight:500}
        .stats-item .sub{font-size:0.75rem;color:var(--muted);margin-top:0.2rem}
        .stats-source-note{margin-top:2rem;text-align:center;font-size:0.7rem;color:var(--muted);border-top:1px solid rgba(0,85,204,0.06);padding-top:1rem}
        .stats-source-note a{color:var(--brand);text-decoration:underline}
        @media (max-width:768px){.stats-grid{grid-template-columns:1fr 1fr;gap:1.2rem}}
        @media (max-width:480px){.stats-grid{grid-template-columns:1fr 1fr;gap:0.8rem}.stats-item .number{font-size:2rem}}

        /* ===== 资讯（改为知识库） ===== */
        .articles{padding:5rem 0;background:var(--bg-alt)}
        .articles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem;margin-top:1rem}
        .article-card{background:var(--bg);border-radius:var(--radius-sm);overflow:hidden;border:1px solid rgba(0,85,204,0.04);transition:all var(--transition);display:flex;flex-direction:column}
        .article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand)}
        .article-card .thumb{height:140px;overflow:hidden;background:var(--brand-light);flex-shrink:0}
        .article-card .thumb img{width:100%;height:100%;object-fit:cover}
        .article-card .body{padding:1rem 1.2rem 0.8rem;flex:1;display:flex;flex-direction:column}
        .article-card .body h3{font-size:0.95rem;font-weight:600;line-height:1.4;margin-bottom:0.3rem}
        .article-card .body h3 a{color:var(--title);transition:color var(--transition)}
        .article-card .body h3 a:hover{color:var(--brand);text-decoration:underline}
        .article-card .body p{font-size:0.85rem;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1;margin-bottom:0.6rem}
        .article-card .meta{display:flex;justify-content:space-between;align-items:center;font-size:0.75rem;color:var(--muted);border-top:1px solid rgba(0,85,204,0.06);padding-top:0.6rem}
        .article-card .meta a{color:var(--brand);font-weight:500}
        .article-card .meta a:hover{color:var(--brand-dark);text-decoration:underline}
        .articles .more-link-wrap{text-align:center;margin-top:2rem}
        .articles .more-link-wrap a{color:var(--brand);font-weight:600;font-size:0.95rem;display:inline-flex;align-items:center;gap:0.4rem}
        .articles .more-link-wrap a:hover{text-decoration:underline}
        @media (max-width:768px){.articles-grid{grid-template-columns:repeat(2,1fr)}}
        @media (max-width:480px){.articles-grid{grid-template-columns:1fr}.article-card .thumb{height:120px}}

        /* ===== FAQ ===== */
        .faq{padding:5rem 0 2rem;background:var(--bg)}
        .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0.8rem;width:100%}
        .faq-item{border:1px solid rgba(0,85,204,0.06);border-radius:var(--radius-sm);overflow:hidden;background:var(--bg);transition:all var(--transition)}
        .faq-item:hover{border-color:rgba(0,85,204,0.15)}
        .faq-question{width:100%;padding:1rem 1.5rem;background:transparent;border:none;text-align:left;font-size:0.98rem;font-weight:600;color:var(--title);cursor:default;display:flex;justify-content:space-between;align-items:center;gap:1rem;font-family:inherit;line-height:1.4;pointer-events:none}
        .faq-question i{font-size:0.9rem;color:var(--brand);flex-shrink:0;transform:rotate(180deg)}
        .faq-answer{padding:0 1.5rem 1.2rem}
        .faq-answer .step{display:flex;align-items:flex-start;gap:0.5rem;font-size:0.92rem;color:var(--body);line-height:1.6;margin-bottom:0.3rem}
        .faq-answer .step .num{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;background:var(--brand-light);color:var(--brand);font-weight:700;font-size:0.75rem;border-radius:50%;flex-shrink:0;margin-top:0.1rem}
        .faq-answer .step strong{color:var(--title)}
        .faq .more-link-wrap{text-align:center;margin-top:1.5rem}
        .faq .more-link-wrap a{color:var(--brand);font-weight:600;font-size:0.95rem}
        .faq .more-link-wrap a:hover{text-decoration:underline}
        @media (max-width:768px){.faq-list{grid-template-columns:1fr}}
        @media (max-width:480px){.faq-question{font-size:0.9rem;padding:0.8rem 1rem}.faq-answer{padding:0 1rem 0.8rem}.faq-answer .step{font-size:0.85rem}}

        /* ===== 底部 ===== */
        .footer{padding:2.8rem 0 2rem;background:var(--title);color:rgba(255,255,255,0.7);border-top:1px solid rgba(255,255,255,0.06)}
        .footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem}
        .footer-left{display:flex;flex-wrap:wrap;align-items:center;gap:1.6rem}
        .footer-links{display:flex;flex-wrap:wrap;gap:1.6rem}
        .footer-links a{color:rgba(255,255,255,0.7);font-size:0.9rem;transition:color var(--transition)}
        .footer-links a:hover{color:#fff}
        .footer-social{display:flex;gap:1rem}
        .footer-social a{color:rgba(255,255,255,0.5);font-size:1.1rem;transition:color var(--transition)}
        .footer-social a:hover{color:#fff}
        .footer-copy{font-size:0.85rem;color:rgba(255,255,255,0.5)}
        .footer-copy .icp{display:block;margin-top:0.2rem;font-size:0.75rem}
        @media (max-width:768px){.footer .container{flex-direction:column;text-align:center}.footer-left{flex-direction:column;gap:0.8rem}.footer-links{justify-content:center}.footer-social{justify-content:center}}
        @media (max-width:480px){.footer-links{gap:1rem;justify-content:center}}

        ::-webkit-scrollbar{width:8px}
        ::-webkit-scrollbar-track{background:var(--bg-alt)}
        ::-webkit-scrollbar-thumb{background:var(--brand);border-radius:40px}