:root {
            --cream: #fef8f0;
            --warm-white: #fffaf5;
            --card: #ffffff;
            --deep-cocoa: #2b1a10;
            --hero-bg: #1f1108;
            --accent-coral: #e8815b;
            --accent-amber: #d4943a;
            --accent-gold: #c4853a;
            --text-dark: #2e1f14;
            --text-body: #4a3729;
            --text-muted: #8c7567;
            --border-warm: #f0e0d0;
            --border-soft: #f5e8da;
            --shadow-warm: 0 12px 32px -10px rgba(120, 70, 30, 0.10);
            --shadow-hover: 0 20px 40px -12px rgba(180, 100, 40, 0.20);
            --shadow-glow: 0 8px 28px -6px rgba(200, 120, 50, 0.18);
            --radius-xl: 1.75rem;
            --radius-lg: 1.25rem;
            --radius-md: 0.85rem;
            --radius-sm: 0.55rem;
            --transition: all 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, 'Noto Sans SC', sans-serif;
            background-color: var(--cream);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        /* ===== Header (与首页一致) ===== */
        header {
            background: #fffaf5;
            border-bottom: 1px solid var(--border-soft);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            background: rgba(255, 250, 245, 0.92);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.9rem 0;
            gap: 0.6rem;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .logo-area {
            display: flex;
            align-items: baseline;
            gap: 0.45rem;
            flex-shrink: 0;
            text-decoration: none;
        }
        .logo-area .logo-text {
            font-size: 1.55rem;
            font-weight: 750;
            color: var(--deep-cocoa);
            letter-spacing: -0.02em;
            line-height: 1;
        }
        .logo-area .logo-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-coral);
            margin-left: 2px;
            flex-shrink: 0;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { transform: scale(1); opacity: 0.8; }
            50% { transform: scale(1.7); opacity: 1; }
        }
        .logo-badge {
            background: #fef0e6;
            color: #c0703a;
            font-size: 0.7rem;
            padding: 0.2rem 0.6rem;
            border-radius: 20px;
            font-weight: 600;
            white-space: nowrap;
            letter-spacing: 0.03em;
            border: 1px solid #f5d5ba;
        }
        .nav-links {
            display: flex;
            gap: 1.1rem;
            list-style: none;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-links a {
            color: #5c3d2e;
            text-decoration: none;
            font-weight: 530;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #c06030;
            border-bottom-color: #e0a070;
        }
        .nav-links a.nav-dl {
            background: #fbe9d9;
            color: #b8552a;
            padding: 0.4rem 1rem;
            border-radius: 22px;
            font-weight: 620;
            border-bottom: none;
            transition: var(--transition);
        }
        .nav-links a.nav-dl:hover {
            background: #f5d5b8;
            color: #8b3a1a;
            border-bottom: none;
        }

        /* ===== Page Hero (小型) ===== */
        .page-hero {
            background: linear-gradient(160deg, #2b1a0e 0%, #1f1108 100%);
            position: relative;
            overflow: hidden;
            padding: 3rem 0 2.2rem;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            background: radial-gradient(ellipse at 30% 30%, rgba(220, 140, 80, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .page-hero h1 {
            font-size: clamp(1.8rem, 3.8vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 0.6rem;
        }
        .page-hero h1 span {
            background: linear-gradient(135deg, #f5c080, #e8784a);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .page-hero .hero-desc {
            font-size: 1.05rem;
            color: #d4b896;
            max-width: 640px;
            margin: 0.5rem auto 0;
            line-height: 1.65;
        }

        /* ===== Section公共 ===== */
        .section {
            padding: 3.5rem 0;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 650;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: #c0703a;
            margin-bottom: 0.5rem;
        }
        .section-title {
            font-size: clamp(1.6rem, 3.2vw, 2rem);
            font-weight: 750;
            color: var(--deep-cocoa);
            margin-bottom: 0.6rem;
            letter-spacing: -0.02em;
        }
        .section-desc {
            color: #6b5040;
            font-size: 1rem;
            margin-bottom: 2rem;
            max-width: 680px;
        }

        /* ===== 平台卡片 ===== */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.8rem;
            margin-top: 1rem;
        }
        .platform-card {
            background: var(--card);
            border-radius: var(--radius-xl);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-warm);
            border: 1px solid var(--border-warm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        .platform-card::after {
            content: "";
            position: absolute;
            top: -30px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: rgba(240, 160, 90, 0.05);
            pointer-events: none;
            transition: var(--transition);
        }
        .platform-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: #f0c8a0;
        }
        .platform-card:hover::after {
            transform: scale(1.3);
            background: rgba(240, 150, 80, 0.09);
        }
        .platform-icon {
            font-size: 2.8rem;
            margin-bottom: 0.7rem;
            line-height: 1;
            position: relative;
            z-index: 1;
        }
        .platform-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--deep-cocoa);
            margin-bottom: 0.3rem;
            position: relative;
            z-index: 1;
        }
        .platform-card .version-badge {
            display: inline-block;
            background: #fef0e6;
            color: #b8552a;
            font-size: 0.75rem;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-weight: 600;
            margin-bottom: 0.8rem;
            width: fit-content;
            border: 1px solid #f5d5ba;
            position: relative;
            z-index: 1;
        }
        .platform-card p {
            color: #5c4030;
            font-size: 0.93rem;
            margin-bottom: 1rem;
            flex-grow: 1;
            position: relative;
            z-index: 1;
            line-height: 1.6;
        }
        .btn-download {
            background: linear-gradient(135deg, #e8784a, #d06038);
            color: #fff;
            padding: 0.65rem 1.8rem;
            border-radius: 30px;
            font-weight: 620;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(200, 90, 40, 0.25);
            width: fit-content;
            position: relative;
            z-index: 1;
            font-size: 0.9rem;
        }
        .btn-download:hover {
            background: linear-gradient(135deg, #f09060, #d86840);
            box-shadow: 0 8px 22px rgba(200, 90, 40, 0.35);
            transform: translateY(-1px);
        }
        .btn-soft-dl {
            color: #c06030;
            font-weight: 620;
            text-decoration: none;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            margin-left: 1rem;
            position: relative;
            z-index: 1;
            transition: var(--transition);
        }
        .btn-soft-dl:hover {
            color: #8b3a1a;
        }
        .dl-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            position: relative;
            z-index: 1;
        }

        /* ===== 对比表格 ===== */
        .compare-table-wrap {
            overflow-x: auto;
            margin: 1.5rem 0;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-warm);
            border: 1px solid var(--border-warm);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--card);
            min-width: 600px;
        }
        .compare-table th {
            background: #fef9f2;
            color: var(--deep-cocoa);
            font-weight: 700;
            padding: 1rem 1.2rem;
            text-align: left;
            font-size: 0.9rem;
            border-bottom: 2px solid #f0d8c0;
        }
        .compare-table td {
            padding: 0.9rem 1.2rem;
            border-bottom: 1px solid var(--border-soft);
            color: #4a3729;
            font-size: 0.9rem;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .highlight-cell {
            color: #b8552a;
            font-weight: 600;
        }

        /* ===== 步骤盒子 ===== */
        .steps-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            counter-reset: installstep;
        }
        .step-item {
            flex: 1;
            min-width: 140px;
            max-width: 200px;
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1rem;
            text-align: center;
            border: 1px solid var(--border-warm);
            box-shadow: var(--shadow-warm);
            transition: var(--transition);
            counter-increment: installstep;
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: #f0c090;
        }
        .step-item::before {
            content: counter(installstep);
            display: block;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #e8784a, #d4943a);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1rem;
            line-height: 38px;
            margin: 0 auto 0.8rem;
            box-shadow: 0 4px 12px rgba(200, 100, 40, 0.25);
        }
        .step-item h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--deep-cocoa);
            margin-bottom: 0.3rem;
        }
        .step-item p {
            font-size: 0.78rem;
            color: #7a5e4a;
            line-height: 1.4;
        }

        /* ===== 安全承诺卡片 ===== */
        .promise-card {
            background: linear-gradient(135deg, #fff8f0, #fffaf5);
            border: 1px solid #f5d5ba;
            border-radius: var(--radius-xl);
            padding: 2rem 1.8rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .promise-icon {
            font-size: 3rem;
            flex-shrink: 0;
        }
        .promise-text h3 {
            font-size: 1.3rem;
            color: var(--deep-cocoa);
            margin-bottom: 0.3rem;
        }
        .promise-text p {
            color: #5c4030;
            font-size: 0.93rem;
        }

        /* ===== FAQ 折叠风格(简版) ===== */
        .faq-block {
            display: grid;
            gap: 0.8rem;
            margin: 1.5rem 0;
        }
        .faq-item {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 1.2rem 1.5rem;
            border: 1px solid var(--border-warm);
            box-shadow: var(--shadow-warm);
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: #f0c090;
            box-shadow: var(--shadow-hover);
        }
        .faq-q {
            font-weight: 700;
            color: var(--deep-cocoa);
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .faq-q::before {
            content: "❓";
            font-size: 1.1rem;
        }
        .faq-a {
            margin-top: 0.6rem;
            color: #4a3729;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            background: linear-gradient(150deg, #2b180c 0%, #3d2015 50%, #1f0f06 100%);
            border-radius: var(--radius-xl);
            padding: 3rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin: 2.5rem 0 1rem;
            border: 1px solid rgba(220, 150, 80, 0.3);
        }
        .cta-banner::before {
            content: "";
            position: absolute;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(220, 140, 70, 0.18), transparent 68%);
            top: -90px;
            right: -70px;
            pointer-events: none;
        }
        .cta-banner::after {
            content: "";
            position: absolute;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(240, 170, 100, 0.10), transparent 65%);
            bottom: -60px;
            left: -40px;
            pointer-events: none;
        }
        .cta-banner h3 {
            font-size: clamp(1.4rem, 2.5vw, 1.8rem);
            font-weight: 780;
            color: #fff;
            margin-bottom: 0.6rem;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            color: #e0c8a8;
            font-size: 1rem;
            margin-bottom: 1.8rem;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-banner .btn-warm {
            font-size: 0.95rem;
            padding: 0.8rem 2.2rem;
            background: linear-gradient(135deg, #e8784a, #d06038);
            color: #fff;
            border-radius: 30px;
            font-weight: 620;
            text-decoration: none;
            display: inline-block;
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 14px rgba(200, 90, 40, 0.3);
            transition: var(--transition);
        }
        .cta-banner .btn-warm:hover {
            background: linear-gradient(135deg, #f09060, #d86840);
            box-shadow: 0 8px 22px rgba(200, 90, 40, 0.4);
        }

        /* ===== Footer (与首页一致) ===== */
        footer {
            background: #1f1108;
            color: #b09880;
            padding: 2.5rem 0;
            margin-top: 2rem;
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: flex-start;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .footer-col h5 {
            color: #f0d8b8;
            margin-bottom: 0.7rem;
            font-size: 0.9rem;
            font-weight: 650;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.35rem;
        }
        .footer-col ul li a {
            color: #b09880;
            text-decoration: none;
            font-size: 0.82rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #f0b878;
        }
        .copyright {
            text-align: center;
            padding-top: 1.4rem;
            margin-top: 1rem;
            border-top: 1px solid #3d2518;
            font-size: 0.78rem;
            color: #8c7058;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 768px) {
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .nav-links {
                gap: 0.6rem;
                font-size: 0.82rem;
            }
            .platform-grid {
                grid-template-columns: 1fr;
            }
            .compare-table-wrap {
                margin: 1rem 0;
            }
            .step-item {
                min-width: 120px;
                max-width: 100%;
                flex: 0 0 calc(50% - 0.5rem);
            }
            .promise-card {
                flex-direction: column;
                text-align: center;
            }
            .dl-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .btn-soft-dl {
                margin-left: 0;
            }
        }
        @media (max-width: 480px) {
            .step-item {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .nav-links a {
                font-size: 0.75rem;
            }
            .cta-banner {
                padding: 2rem 1rem;
            }
        }