:root {
            --green-deep: #0f5a49;
            --green-mid: #1e6f5c;
            --green-light: #289672;
            --green-pale: #e6f4ef;
            --green-surface: #f4faf7;
            --text-primary: #1a2c3e;
            --text-secondary: #2c4b5f;
            --text-muted: #4a6a7a;
            --white: #ffffff;
            --card-shadow: 0 6px 24px rgba(0, 0, 0, 0.04);
            --card-hover-shadow: 0 20px 40px -12px rgba(15, 90, 73, 0.14);
            --radius-xl: 32px;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-full: 60px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background: linear-gradient(165deg, #f6faf8 0%, #edf4f0 30%, #f8fbf9 70%, #eef5f1 100%);
            background-attachment: fixed;
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER ========== */
        header {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(30, 111, 92, 0.08);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.03);
            transition: var(--transition);
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 14px 0;
            gap: 16px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            font-size: 30px;
            font-weight: 900;
            background: linear-gradient(135deg, #1e6f5c, #289672);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1;
        }
        .logo-text {
            font-weight: 750;
            font-size: 1.55rem;
            letter-spacing: -0.4px;
            background: linear-gradient(135deg, #1a3b34, #1e6f5c);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 520;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 0.95rem;
            padding: 7px 15px;
            border-radius: 24px;
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--green-mid);
            background: rgba(30, 111, 92, 0.06);
        }
        .nav-links a.active {
            font-weight: 650;
            background: rgba(30, 111, 92, 0.1);
        }
        .nav-download-btn {
            background: var(--green-mid);
            color: #fff !important;
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 620;
            box-shadow: 0 2px 10px rgba(30, 111, 92, 0.25);
        }
        .nav-download-btn:hover {
            background: var(--green-deep);
            box-shadow: 0 6px 18px rgba(15, 90, 73, 0.35);
            transform: translateY(-2px);
        }

        /* ========== HERO ========== */
        .hero-download {
            padding: 44px 0 30px;
            text-align: center;
        }
        .hero-download .badge-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .hero-download .badge-tag {
            background: rgba(30, 111, 92, 0.08);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 580;
            color: var(--green-mid);
            border: 1px solid rgba(30, 111, 92, 0.12);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .hero-download h1 {
            font-size: clamp(1.9rem, 3.8vw, 2.8rem);
            font-weight: 850;
            background: linear-gradient(145deg, #143829 0%, #1e6f5c 55%, #289672 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            line-height: 1.25;
        }
        .hero-download .hero-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 20px;
            line-height: 1.65;
        }
        .hero-download .hero-sub strong {
            color: var(--green-mid);
        }
        .platform-quick-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 8px;
        }
        .platform-quick-tabs a {
            text-decoration: none;
            padding: 9px 20px;
            border-radius: 32px;
            font-weight: 580;
            font-size: 0.9rem;
            transition: var(--transition);
            background: #fff;
            color: var(--text-secondary);
            border: 1.5px solid #dce8e3;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .platform-quick-tabs a:hover {
            border-color: var(--green-mid);
            background: var(--green-pale);
            color: var(--green-deep);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(15, 90, 73, 0.1);
        }

        /* ========== SECTION TITLES ========== */
        .section-title {
            text-align: center;
            font-size: clamp(1.6rem, 2.6vw, 2rem);
            font-weight: 750;
            margin-bottom: 8px;
            color: #1a2c3e;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto 36px;
            font-size: 0.93rem;
            line-height: 1.6;
        }

        /* ========== CLIENTS DETAIL SECTION ========== */
        .clients-detail-section {
            padding: 40px 0;
        }
        .client-detail-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            margin-bottom: 24px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: flex-start;
            position: relative;
            overflow: hidden;
        }
        .client-detail-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: linear-gradient(180deg, #1e6f5c, #289672, #5cc9a0);
            border-radius: 0 4px 4px 0;
            opacity: 0;
            transition: var(--transition);
        }
        .client-detail-card:hover::before {
            opacity: 1;
        }
        .client-detail-card:hover {
            box-shadow: var(--card-hover-shadow);
            border-color: #d4ebe2;
            transform: translateY(-3px);
        }
        .client-detail-card .client-icon-wrap {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: var(--green-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.2rem;
        }
        .client-detail-card .client-info {
            flex: 1;
            min-width: 240px;
        }
        .client-detail-card .client-info h3 {
            font-size: 1.25rem;
            font-weight: 720;
            color: #1e5a4f;
            margin-bottom: 4px;
        }
        .client-detail-card .client-info .client-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .client-detail-card .client-info .client-meta span {
            background: #f4f8f6;
            padding: 3px 10px;
            border-radius: 16px;
            font-weight: 520;
        }
        .client-detail-card .client-info p {
            font-size: 0.9rem;
            color: #4a6a7a;
            line-height: 1.6;
            margin-bottom: 8px;
        }
        .client-detail-card .client-info .protocol-row {
            display: flex;
            flex-wrap: wrap;
            gap: 5px;
            margin-bottom: 10px;
        }
        .client-detail-card .client-info .protocol-row .ptag {
            font-size: 0.7rem;
            padding: 3px 9px;
            border-radius: 14px;
            background: #eef6f2;
            color: #1e6f5c;
            font-weight: 550;
        }
        .client-detail-card .client-actions {
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex-shrink: 0;
            min-width: 140px;
            align-items: flex-end;
        }
        .btn-dl-sm {
            background: var(--green-mid);
            color: #fff;
            padding: 10px 22px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 620;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 2px 10px rgba(30, 111, 92, 0.2);
            border: none;
            cursor: pointer;
        }
        .btn-dl-sm:hover {
            background: var(--green-deep);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 90, 73, 0.32);
        }
        .btn-guide-sm {
            background: transparent;
            border: 1.5px solid var(--green-mid);
            color: var(--green-mid);
            padding: 9px 20px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-guide-sm:hover {
            background: rgba(30, 111, 92, 0.07);
            border-color: var(--green-deep);
            color: var(--green-deep);
        }

        /* 推荐标签 */
        .badge-recommend {
            background: linear-gradient(135deg, #1e6f5c, #289672);
            color: #fff;
            font-size: 0.7rem;
            padding: 3px 10px;
            border-radius: 14px;
            font-weight: 650;
            display: inline-block;
            margin-left: 6px;
            vertical-align: middle;
            letter-spacing: 0.3px;
        }

        /* ========== COMPARISON TABLE ========== */
        .compare-section {
            padding: 40px 0;
        }
        .table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--radius-lg);
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            background: #fff;
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.88rem;
            min-width: 680px;
            white-space: nowrap;
        }
        .compare-table thead th {
            background: #f4faf7;
            color: #1e5a4f;
            font-weight: 680;
            padding: 14px 16px;
            text-align: left;
            border-bottom: 2px solid #d4ebe2;
            font-size: 0.85rem;
            letter-spacing: 0.2px;
        }
        .compare-table tbody td {
            padding: 13px 16px;
            border-bottom: 1px solid #eef5f1;
            color: #3a5a6e;
            vertical-align: top;
            white-space: normal;
            line-height: 1.5;
        }
        .compare-table tbody tr:hover td {
            background: #fafffd;
        }
        .compare-table .highlight-col {
            font-weight: 650;
            color: #1e6f5c;
        }
        .compare-table .check-icon {
            color: #1e6f5c;
            font-weight: 700;
        }
        .compare-table .semi-icon {
            color: #c9a03a;
            font-weight: 600;
        }

        /* ========== MOBILE CLIENTS ========== */
        .mobile-section {
            padding: 36px 0;
        }
        .mobile-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }
        .mobile-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 22px 18px;
            border: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: var(--card-shadow);
            transition: var(--transition);
            text-align: center;
        }
        .mobile-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-hover-shadow);
            border-color: #d4ebe2;
        }
        .mobile-card .m-icon {
            font-size: 2.6rem;
            margin-bottom: 10px;
            line-height: 1;
        }
        .mobile-card h4 {
            font-weight: 680;
            color: #1e5a4f;
            margin-bottom: 6px;
            font-size: 1rem;
        }
        .mobile-card p {
            font-size: 0.82rem;
            color: #4a6a7a;
            margin-bottom: 12px;
            line-height: 1.5;
        }
        .mobile-card a {
            color: var(--green-mid);
            font-weight: 600;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .mobile-card a:hover {
            color: var(--green-deep);
            text-decoration: underline;
        }

        /* ========== BOTTOM CTA ========== */
        .bottom-cta-section {
            padding: 30px 0 50px;
        }
        .bottom-cta {
            background: linear-gradient(145deg, #0f3d30 0%, #1a5c48 40%, #1e6f5c 100%);
            border-radius: var(--radius-xl);
            padding: 44px 28px;
            text-align: center;
            color: #fff;
            box-shadow: 0 18px 40px -10px rgba(15, 90, 73, 0.35);
            position: relative;
            overflow: hidden;
        }
        .bottom-cta::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-cta h2 {
            font-size: clamp(1.5rem, 2.8vw, 2rem);
            font-weight: 750;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .bottom-cta p {
            font-size: 0.95rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 22px;
            position: relative;
            z-index: 1;
        }
        .bottom-cta .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            color: var(--green-deep);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            text-decoration: none;
            transition: var(--transition);
            position: relative;
            z-index: 1;
            box-shadow: 0 6px 22px rgba(0, 0, 0, 0.2);
            border: none;
            cursor: pointer;
        }
        .bottom-cta .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.3);
            background: #f0faf6;
        }
        .bottom-cta .cta-sub-links {
            margin-top: 18px;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 18px;
            position: relative;
            z-index: 1;
            font-size: 0.9rem;
        }
        .bottom-cta .cta-sub-links a {
            color: #c8e8db;
            text-decoration: none;
            font-weight: 520;
            transition: var(--transition);
        }
        .bottom-cta .cta-sub-links a:hover {
            color: #fff;
            text-decoration: underline;
        }

        /* ========== INFO NOTE ========== */
        .info-note {
            background: #fffdf5;
            border: 1px solid #e8dca0;
            border-radius: var(--radius-md);
            padding: 16px 20px;
            margin: 20px 0;
            font-size: 0.85rem;
            color: #6b5a20;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.55;
        }
        .info-note .note-icon {
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #0b241e;
            color: #b0d3c6;
            padding: 44px 0 20px;
            border-top-left-radius: 28px;
            border-top-right-radius: 28px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 28px;
        }
        .footer-content h4 {
            color: #e2f5ec;
            margin-bottom: 10px;
            font-size: 1rem;
        }
        .footer-content p {
            font-size: 0.85rem;
            line-height: 1.6;
        }
        .footer-content a {
            color: #b0d3c6;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-content a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 30px;
            font-size: 0.8rem;
            border-top: 1px solid #2d554a;
            margin-top: 18px;
            opacity: 0.75;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 900px) {
            .nav-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                gap: 4px;
                flex-wrap: wrap;
            }
            .nav-links a {
                font-size: 0.85rem;
                padding: 6px 10px;
            }
            .client-detail-card {
                flex-direction: column;
                align-items: stretch;
            }
            .client-detail-card .client-actions {
                flex-direction: row;
                flex-wrap: wrap;
                align-items: center;
                justify-content: flex-start;
            }
            .compare-table {
                font-size: 0.78rem;
                min-width: 560px;
            }
            .hero-download h1 {
                font-size: 1.7rem;
            }
            .platform-quick-tabs a {
                font-size: 0.8rem;
                padding: 7px 14px;
            }
        }
        @media (max-width: 480px) {
            .hero-download h1 {
                font-size: 1.45rem;
            }
            .hero-download .hero-sub {
                font-size: 0.9rem;
            }
            .client-detail-card .client-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-dl-sm,
            .btn-guide-sm {
                text-align: center;
                justify-content: center;
            }
            .bottom-cta {
                padding: 30px 16px;
            }
            .bottom-cta h2 {
                font-size: 1.3rem;
            }
        }