:root {
            --teal-deep: #0b5c58;
            --teal-mid: #1a7f7a;
            --teal-soft: #e6f5f3;
            --slate-800: #1a3c4a;
            --slate-600: #3e5a6c;
            --slate-400: #5c7380;
            --border-subtle: #e8eef3;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.02);
            --shadow-hover: 0 18px 28px -14px rgba(0, 0, 0, 0.08);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, sans-serif;
            background: #fefefe; color: #11181c; line-height: 1.45;
            -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
        }
        .container { max-width: 1300px; margin: 0 auto; padding: 0 32px; }
        .site-header {
            background: rgba(255,255,255,0.94); backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px); position: sticky; top: 0; z-index: 100;
            border-bottom: 1px solid rgba(0,0,0,0.05); transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
        .header-flex {
            display: flex; align-items: center; justify-content: space-between;
            padding: 14px 0; flex-wrap: wrap; gap: 18px;
        }
        .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
        .brand-logo-img {
            width: 40px; height: 40px; object-fit: contain; border-radius: 10px;
            background: linear-gradient(135deg, #0f6e6a 0%, #1a8a7e 100%);
            display: flex; align-items: center; justify-content: center; font-size: 1.4rem; flex-shrink: 0;
        }
        .brand-name { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.4px; color: #0c4e6e; white-space: nowrap; }
        .brand-name span { font-weight: 400; color: #5a7d8c; font-size: 0.8rem; margin-left: 2px; }
        .nav-links-new { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
        .nav-links-new a {
            text-decoration: none; font-weight: 500; font-size: 0.93rem; color: #2c3e50;
            transition: color 0.2s, transform 0.15s; position: relative; white-space: nowrap;
        }
        .nav-links-new a:hover, .nav-links-new a.active { color: #1a7f7a; }
        .nav-links-new a::after {
            content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
            background: #1a7f7a; border-radius: 2px; transition: width 0.25s ease;
        }
        .nav-links-new a:hover::after, .nav-links-new a.active::after { width: 100%; }
        .btn-ghost {
            border: 1px solid #cbd5e1; padding: 7px 20px; border-radius: 100px;
            background: transparent; font-weight: 500; font-size: 0.9rem; cursor: pointer;
            transition: all 0.2s; text-decoration: none; color: #2c3e50; white-space: nowrap;
        }
        .btn-ghost:hover { border-color: #1a7f7a; color: #1a7f7a; background: #f0faf9; }
        .section-header { text-align: center; margin-bottom: 40px; }
        .section-header h2 { font-size: 2.05rem; font-weight: 700; color: #1a3c4a; letter-spacing: -0.02em; }
        .section-subtitle { color: #5c7380; font-size: 0.98rem; margin-top: 8px; }
        .btn-primary-alt {
            background: #0f6e6a; color: #fff; border: none; padding: 13px 28px;
            border-radius: 100px; font-weight: 600; font-size: 0.95rem; cursor: pointer;
            text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
            transition: all 0.25s; white-space: nowrap;
        }
        .btn-primary-alt:hover { background: #0b5653; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,110,106,0.25); }
        .btn-outline-alt {
            background: transparent; color: #2c3e50; border: 1.5px solid #dde4ea;
            padding: 11px 24px; border-radius: 100px; font-weight: 500; font-size: 0.9rem;
            cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
            transition: all 0.25s; white-space: nowrap;
        }
        .btn-outline-alt:hover { border-color: #1a7f7a; color: #1a7f7a; background: #f9fdfc; }
        .footer-alt {
            background: #f1f5f9; padding: 44px 0 32px; font-size: 0.88rem; color: #5c7380;
            border-top: 1px solid #e9edf2;
        }
        .footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 30px; }
        .footer-col h5 { font-weight: 700; color: #1a3c4a; margin-bottom: 10px; font-size: 0.93rem; }
        .footer-col a { display: block; color: #5c7380; text-decoration: none; margin-bottom: 6px; font-size: 0.86rem; transition: color 0.2s; }
        .footer-col a:hover { color: #1a7f7a; }
        .footer-bottom { text-align: center; margin-top: 26px; padding-top: 18px; border-top: 1px solid #dde4ea; font-size: 0.8rem; color: #8a9ba7; }
        .card-hover {
            background: #fafcfd; border: 1px solid #e8eef3; border-radius: 22px; padding: 26px;
            transition: all 0.3s; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 10px;
        }
        .card-hover:hover { transform: translateY(-5px); border-color: #b8d8d4; box-shadow: 0 16px 32px -12px rgba(15,110,106,0.12); background: #fff; }
        .card-icon { font-size: 2.2rem; line-height: 1; }
        .card-arrow { font-size: 0.84rem; color: #1a7f7a; font-weight: 600; margin-top: auto; display: flex; align-items: center; gap: 4px; }
        @media (max-width: 780px) {
            .container { padding: 0 18px; }
            .header-flex { gap: 12px; }
            .nav-links-new { gap: 12px; }
            .nav-links-new a { font-size: 0.83rem; }
            .brand-name { font-size: 1.25rem; }
            .brand-name span { display: none; }
            .footer-grid { gap: 20px; }
            .section-header h2 { font-size: 1.6rem; }
        }
        @media (max-width: 480px) {
            .brand-logo-img { width: 34px; height: 34px; font-size: 1.2rem; }
        }
        /* 下载页特有 */
        .download-hero {
            padding: 45px 0 30px; background: #fff; border-bottom: 1px solid #f0f4f8;
        }
        .platform-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 28px 0;
        }
        .platform-card {
            background: #fff; border: 1.5px solid #e8eef3; border-radius: 22px; padding: 24px;
            text-align: center; transition: all 0.25s;
        }
        .platform-card.primary { border-color: #0f6e6a; background: #f9fdfc; box-shadow: 0 8px 28px -10px rgba(15,110,106,0.08); }
        .platform-card h3 { font-size: 1.3rem; color: #1a3c4a; margin-bottom: 8px; }
        .platform-card .plat-desc { font-size: 0.88rem; color: #5c7380; margin-bottom: 14px; }
        .faq-block { background: #f9fbfd; border-radius: 20px; padding: 28px; margin: 30px 0; }
        .faq-block h3 { color: #1a3c4a; margin-bottom: 12px; }
        .faq-block p { color: #3e5a6c; font-size: 0.93rem; line-height: 1.6; margin-bottom: 8px; }
        .resource-links { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0; }
        .resource-links a {
            background: #f0faf7; border: 1px solid #d0e8e4; padding: 10px 20px; border-radius: 40px;
            text-decoration: none; color: #0f6e6a; font-weight: 500; font-size: 0.88rem; transition: 0.2s;
        }
        .resource-links a:hover { background: #0f6e6a; color: #fff; border-color: #0f6e6a; }