* { margin:0; padding:0; box-sizing:border-box; }
        body {
            font-family: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
            background: #f5faff;
            color: #0a2540;
            line-height: 1.6;
            scroll-behavior: smooth;
        }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 40px; }

        /* ===== navbar ===== */
        .navbar {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,80,200,0.06);
            position: sticky; top:0; z-index:100;
            padding: 14px 0;
        }
        .nav-inner {
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; gap: 12px;
        }
        .logo-area {
            display: flex; align-items: center; gap: 10px;
            font-weight: 700; font-size: 1.6rem; color: #0a2540;
            text-decoration: none;
        }
        .logo-area img { height: 40px; width: auto; display: block; }
        .logo-area span { color: #0066ff; }
        .nav-links {
            display: flex; gap: 24px; align-items: center; flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none; font-weight: 500; color: #1d3b5a;
            font-size: 0.92rem; transition: 0.2s; position: relative;
        }
        .nav-links a::after {
            content:''; position:absolute; bottom:-2px; left:0; width:0;
            height:2px; background: #0066ff; transition: width 0.3s;
        }
        .nav-links a:hover::after { width:100%; }
        .nav-links a:hover { color:#0066ff; }
        .nav-links a.active { color:#0066ff; }
        .nav-links a.active::after { width:100%; }
        .btn-nav {
            background: #0066ff; color:#fff !important;
            padding: 8px 24px; border-radius: 40px;
            font-weight:600; font-size:0.85rem;
            box-shadow: 0 4px 16px rgba(0,102,255,0.18);
            transition: all 0.3s;
        }
        .btn-nav::after { display:none !important; }
        .btn-nav:hover { background: #0052cc; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,102,255,0.25); }

        .section-badge {
            display: inline-block; background: rgba(0,102,255,0.04);
            border: 1px solid rgba(0,102,255,0.06); border-radius: 40px;
            padding: 3px 18px; font-size: 0.75rem; font-weight: 600;
            color: #0066ff; margin-bottom: 4px;
        }
        .section-title {
            font-size: 1.8rem; font-weight: 700; color: #0a2540;
        }
        .section-title i { color: #0066ff; margin-right: 8px; }
        .section-sub { color: #2f5478; font-size: 0.95rem; }

        /* ===== 下载英雄区 ===== */
        .download-hero {
            padding: 70px 0 60px;
            background: linear-gradient(135deg, #ffffff 0%, #e6f0ff 100%);
        }
        .download-hero .hero-grid {
            display: flex; align-items: center; gap: 60px;
            flex-wrap: wrap;
        }
        .download-hero .hero-left { flex: 1.1; min-width: 320px; }
        .download-hero .hero-right { flex: 1.2; min-width: 300px; display: flex; justify-content: flex-end; }
        .download-hero .hero-badge {
            display: inline-block; background: rgba(0,102,255,0.06);
            border: 1px solid rgba(0,102,255,0.08); border-radius: 40px;
            padding: 6px 22px; font-size: 0.85rem; font-weight: 600;
            color: #0066ff; margin-bottom: 12px;
        }
        .download-hero h1 {
            font-size: 3.2rem; font-weight: 800; color: #0a2540;
            line-height: 1.08; margin-bottom: 10px;
        }
        .download-hero h1 .highlight { color: #0066ff; }
        .download-hero .hero-desc {
            font-size: 1.08rem; color: #2f5478; max-width: 540px;
            margin-bottom: 18px; line-height: 1.9;
        }
        .download-hero .hero-desc strong { color: #0a2540; }
        .download-hero .hero-actions {
            display: flex; flex-wrap: wrap; gap: 14px;
            margin-bottom: 16px;
        }
        .btn-primary {
            background: #0066ff; color: #fff; border: none;
            padding: 14px 38px; border-radius: 60px; font-weight: 600;
            font-size: 1rem; display: inline-flex; align-items: center; gap: 10px;
            box-shadow: 0 4px 16px rgba(0,102,255,0.2);
            transition: all 0.3s; cursor: pointer; text-decoration: none;
        }
        .btn-primary:hover { transform: translateY(-3px); background: #0052cc; box-shadow: 0 8px 28px rgba(0,102,255,0.3); }
        .btn-outline {
            background: transparent; border: 1.5px solid rgba(0,102,255,0.15);
            color: #1d3b5a; padding: 14px 28px; border-radius: 60px;
            font-weight: 600; font-size: 1rem; display: inline-flex;
            align-items: center; gap: 10px; transition: 0.3s; text-decoration: none;
        }
        .btn-outline:hover { border-color: #0066ff; color: #0066ff; background: rgba(0,102,255,0.02); }
        .download-hero .hero-platforms {
            display: flex; gap: 12px; flex-wrap: wrap;
            margin-top: 8px;
        }
        .download-hero .hero-platforms span {
            display: inline-flex; align-items: center; gap: 8px;
            background: #ffffff; padding: 6px 18px; border-radius: 30px;
            font-size: 0.9rem; font-weight: 500; color: #1d3b5a;
            border: 1px solid rgba(0,102,255,0.06);
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
        }
        .download-hero .hero-platforms i { color: #0066ff; }
        .download-hero .version-tag {
            display: inline-block; background: rgba(34,197,94,0.08);
            border: 1px solid rgba(34,197,94,0.12); border-radius: 40px;
            padding: 4px 18px; font-size: 0.75rem; font-weight: 600;
            color: #22c55e; margin-top: 4px;
        }
        .download-hero .hero-right .img-wrapper {
            background: #ffffff; border: 2px solid rgba(0,102,255,0.06);
            border-radius: 24px; padding: 10px;
            box-shadow: 0 8px 32px rgba(0,102,255,0.04);
            transition: 0.4s; display: inline-flex;
            align-items: center; justify-content: center; max-width: 100%;
            animation: heroFloat 3.5s ease-in-out infinite;
        }
        .download-hero .hero-right .img-wrapper:hover {
            border-color: #0066ff; transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0,102,255,0.06);
        }
        @keyframes heroFloat {
            0% { transform: translateY(0); }
            50% { transform: translateY(-14px); }
            100% { transform: translateY(0); }
        }
        .download-hero .hero-right .img-wrapper img {
            width: 100%; max-width: 680px; height: auto; border-radius: 16px;
            max-height: 380px; object-fit: contain; background: #fff;
            display: block;
        }

        /* ===== 下载卡片 ===== */
        .download-grid-section { padding: 60px 0 70px; background: #ffffff; }
        .download-grid {
            display: grid; grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .download-card {
            background: #f7faff; border-radius: 24px; padding: 32px 24px 28px;
            text-align: center; border: 1px solid rgba(0,102,255,0.04);
            transition: 0.3s; box-shadow: 0 2px 12px rgba(0,0,0,0.02);
        }
        .download-card:hover {
            transform: translateY(-6px); border-color: rgba(0,102,255,0.10);
            box-shadow: 0 16px 32px rgba(0,102,255,0.06);
        }
        .download-card .icon-wrap { font-size: 3.2rem; color: #0066ff; margin-bottom: 10px; display: block; }
        .download-card h3 { font-size: 1.2rem; font-weight: 700; color: #0a2540; }
        .download-card .version { font-size: 0.72rem; color: #5a7fa0; display: block; margin-top: 2px; }
        .download-card .desc { font-size: 0.85rem; color: #2f5478; margin: 8px 0 12px; line-height: 1.5; min-height: 44px; }
        .download-card .file-size { font-size: 0.72rem; color: #94a3b8; }
        .download-card .btn-download {
            display: inline-flex; align-items: center; gap: 8px;
            background: #0066ff; color: #fff; padding: 10px 28px;
            border-radius: 40px; font-weight: 600; font-size: 0.85rem;
            text-decoration: none; transition: 0.3s;
            box-shadow: 0 4px 12px rgba(0,102,255,0.12);
            margin-top: 8px;
        }
        .download-card .btn-download:hover { background: #0052cc; transform: translateY(-2px); }
        .download-card .badge-hot {
            font-size: 0.6rem; font-weight: 700; color: #0066ff;
            background: rgba(0,102,255,0.04); padding: 2px 12px;
            border-radius: 30px; display: inline-block; margin-bottom: 6px;
        }
        .download-card.featured-card {
            border: 2px solid #0066ff;
            background: linear-gradient(145deg, #ffffff, #f0f7ff);
            position: relative;
        }
        .download-card.featured-card::before {
            content: "推荐"; position: absolute; top: -10px; right: 16px;
            background: #0066ff; color: #fff; padding: 2px 14px;
            border-radius: 30px; font-size: 0.6rem; font-weight: 600;
        }
        .download-card .badge-new {
            font-size: 0.6rem; font-weight: 700; color: #22c55e;
            background: rgba(34,197,94,0.08); padding: 2px 12px;
            border-radius: 30px; display: inline-block; margin-bottom: 6px;
        }

        /* ===== 版本历史 ===== */
        .changelog-section { padding: 50px 0 60px; background: #f7faff; border-top: 1px solid rgba(0,102,255,0.04); }
        .changelog-list { max-width: 820px; margin: 0 auto; }
        .changelog-item {
            display: flex; gap: 16px; padding: 14px 0;
            border-bottom: 1px solid rgba(0,102,255,0.04);
        }
        .changelog-item:last-child { border-bottom: none; }
        .changelog-item .ver { font-weight: 700; color: #0066ff; min-width: 80px; }
        .changelog-item .date { color: #5a7fa0; font-size: 0.8rem; min-width: 100px; }
        .changelog-item .desc { color: #2f5478; }

        /* ===== 下载FAQ ===== */
        .faq-section { padding: 50px 0 60px; background: #ffffff; border-top: 1px solid rgba(0,102,255,0.04); }
        .faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: #f7faff; border-radius: 16px; padding: 18px 24px;
            border: 1px solid rgba(0,102,255,0.03);
        }
        .faq-item .q { font-weight: 700; color: #0a2540; display: flex; align-items: center; gap: 10px; }
        .faq-item .q i { color: #0066ff; }
        .faq-item .a { margin-top: 4px; padding-left: 26px; color: #2f5478; font-size: 0.92rem; line-height: 1.7; }
        .faq-item .a strong { color: #0a2540; }

        /* ===== 底部 ===== */
        .footer {
            background: #0a2540; color: rgba(255,255,255,0.7);
            padding: 50px 0 30px; border-top: 3px solid #0066ff;
        }
        .footer a { color: rgba(255,255,255,0.6); text-decoration: none; transition: 0.2s; }
        .footer a:hover { color: #ffffff; }
        .footer .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px; margin-bottom: 30px;
        }
        .footer .brand-col .logo {
            font-size: 1.8rem; font-weight: 700; color: #fff;
            display: flex; align-items: center; gap: 10px; margin-bottom: 12px;
        }
        .footer .brand-col .logo i { color: #0066ff; }
        .footer .brand-col .logo span { color: #0066ff; }
        .footer .brand-col p { font-size: 0.9rem; line-height: 1.7; max-width: 340px; }
        .footer .col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 14px; letter-spacing: 0.3px; }
        .footer .col ul { list-style: none; }
        .footer .col ul li { margin-bottom: 8px; }
        .footer .col ul li a { font-size: 0.9rem; }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 18px; display: flex; flex-wrap: wrap;
            justify-content: center; align-items: center; gap: 12px; font-size: 0.8rem;
        }
        .footer .footer-bottom .icp { color: rgba(255,255,255,0.4); text-align: center; }
        .footer .footer-bottom .icp a { color: rgba(255,255,255,0.4); }
        .footer .footer-bottom .icp a:hover { color: #fff; }
        .footer .footer-bottom .icp .sep { margin: 0 10px; color: rgba(255,255,255,0.15); }


        @media (max-width: 1024px) {
            .container { padding: 0 30px; }
            .download-hero .hero-grid { flex-direction: column; text-align: center; }
            .download-hero .hero-desc { margin-left: auto; margin-right: auto; }
            .download-hero .hero-actions { justify-content: center; }
            .download-hero .hero-platforms { justify-content: center; }
            .download-hero .hero-right { justify-content: center; }
            .download-grid { grid-template-columns: 1fr 1fr; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 20px; }
            .nav-inner { flex-direction: column; align-items: center; }
            .nav-links { justify-content: center; gap: 10px; }
            .download-hero h1 { font-size: 2.2rem; }
            .download-grid { grid-template-columns: 1fr 1fr; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer .footer-bottom { flex-direction: column; text-align: center; }
            .changelog-item { flex-wrap: wrap; gap: 6px; }
            .download-hero .hero-right .img-wrapper img { max-height: 260px; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 14px; }
            .download-hero h1 { font-size: 1.8rem; }
            .download-grid { grid-template-columns: 1fr; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 20px; text-align: center; }
            .footer .brand-col p { max-width: 100%; }
            .download-hero .hero-right .img-wrapper img { max-height: 200px; max-width: 280px; }
            .download-hero .hero-right .img-wrapper { margin-right: 0; }
        }