:root {
            --bg: #fafbf8;
            --surface: #ffffff;
            --text: #1a221e;
            --text-secondary: #445a4c;
            --text-muted: #6b7d6f;
            --accent: #1a6b4c;
            --accent-dark: #0f4d35;
            --accent-light: #edf7f2;
            --accent-glow: rgba(26, 107, 76, 0.10);
            --teal: #1a6b4c;
            --teal-light: #edf7f2;
            --border: #dce5de;
            --border-light: #eef3ef;
            --warm-highlight: #fdf6ed;
            --amber-accent: #c47a1a;
            --amber-light: #fef9f2;
            --shadow-sm: 0 1px 4px rgba(26, 34, 30, 0.04);
            --shadow-md: 0 6px 20px rgba(26, 34, 30, 0.05);
            --shadow-lg: 0 16px 36px rgba(26, 34, 30, 0.08);
            --shadow-xl: 0 24px 48px rgba(26, 34, 30, 0.10);
            --radius-sm: 14px;
            --radius-md: 22px;
            --radius-lg: 34px;
            --radius-xl: 46px;
            --radius-full: 999px;
            --transition: 0.20s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: 'Inter', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image:
                radial-gradient(ellipse at 12% 8%, rgba(26, 107, 76, 0.025) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 55%, rgba(26, 107, 76, 0.018) 0%, transparent 48%),
                radial-gradient(ellipse at 35% 82%, rgba(196, 122, 26, 0.015) 0%, transparent 42%);
            background-attachment: fixed;
        }

        .container {
            max-width: 1220px;
            margin: 0 auto;
            padding: 0 26px;
        }

        /* ── HEADER ────────────────────── */
        header {
            background: rgba(255, 255, 255, 0.84);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 120;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 15px 0;
            gap: 12px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 14px rgba(26, 107, 76, 0.28);
        }
        .logo-text {
            font-weight: 780;
            font-size: 1.3rem;
            color: var(--text);
            letter-spacing: -0.35px;
        }
        .logo-text span {
            color: var(--accent);
        }
        .nav-links {
            display: flex;
            gap: 8px;
            align-items: center;
            flex-wrap: wrap;
            font-size: 0.91rem;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 530;
            color: var(--text-secondary);
            transition: var(--transition);
            padding: 7px 15px;
            border-radius: var(--radius-full);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent);
            background: var(--accent-light);
        }
        .btn-download-nav {
            background: var(--accent) !important;
            color: #fff !important;
            padding: 9px 21px !important;
            border-radius: var(--radius-full) !important;
            font-weight: 600 !important;
            box-shadow: 0 3px 12px rgba(26, 107, 76, 0.24);
            transition: var(--transition) !important;
        }
        .btn-download-nav:hover {
            background: var(--accent-dark) !important;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(26, 107, 76, 0.32);
        }

        /* ── HERO 下载页专用 ─────────── */
        .download-hero {
            padding: 48px 0 30px;
            text-align: center;
        }
        .download-hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 850;
            letter-spacing: -0.55px;
            margin-bottom: 14px;
        }
        .download-hero h1 .accent {
            color: var(--accent);
            position: relative;
            display: inline-block;
        }
        .download-hero h1 .accent::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 100%;
            height: 7px;
            background: rgba(26, 107, 76, 0.16);
            border-radius: 3px;
            z-index: -1;
        }
        .download-hero .hero-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }
        .platform-anchors {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
            margin-bottom: 20px;
        }
        .platform-anchors a {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 8px 22px;
            text-decoration: none;
            font-weight: 580;
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .platform-anchors a:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-light);
        }

        /* ── 平台下载卡片 ────────────── */
        /* 让整个版块的卡片在容器内居中 */
.platform-section {
    display: flex;
    flex-direction: column;
    align-items: center;   /* 卡片水平居中 */
    gap: 28px;             /* 与已有 margin-bottom 协同，统一间距 */
}

/* 限制卡片最大宽度，避免过宽导致内容松散 */
.platform-card {
    width: 100%;
    max-width: 860px;      /* 根据设计微调，让文字阅读更舒适 */
    margin-left: auto;
    margin-right: auto;
    /* 原有样式保持不变 */
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px 30px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: flex-start;
    gap: 24px;
    flex-wrap: wrap;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
        .platform-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .platform-card .platform-icon {
            font-size: 3rem;
            background: var(--accent-light);
            width: 80px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 28px;
            flex-shrink: 0;
            color: var(--accent);
        }
        .platform-content {
            flex: 1;
        }
        .platform-content h2 {
            font-size: 1.6rem;
            font-weight: 750;
            margin-bottom: 6px;
            letter-spacing: -0.3px;
        }
        .platform-content .meta-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin: 6px 0 12px;
        }
        .platform-content .desc-text {
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .download-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
            margin-bottom: 12px;
        }
        .btn-dl {
            background: var(--accent);
            color: #fff;
            padding: 11px 26px;
            border-radius: var(--radius-full);
            text-decoration: none;
            font-weight: 620;
            font-size: 0.93rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 6px 18px rgba(26, 107, 76, 0.23);
            border: none;
            cursor: pointer;
        }
        .btn-dl:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(26, 107, 76, 0.32);
        }
        .btn-secondary {
            background: transparent;
            border: 1.5px solid var(--accent);
            color: var(--accent);
            padding: 10px 22px;
            border-radius: var(--radius-full);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .btn-secondary:hover {
            background: var(--accent-light);
            border-color: var(--accent-dark);
        }
        .checksum-box {
            background: #f6f9f5;
            border-radius: 14px;
            padding: 12px 18px;
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .checksum-box strong {
            font-family: monospace;
            color: var(--text);
            font-size: 0.84rem;
            word-break: break-all;
        }
        .ios-note {
            background: #fefaf5;
            border-left: 4px solid var(--amber-accent);
            border-radius: 12px;
            padding: 18px 22px;
            font-size: 0.92rem;
            color: #5c3d1e;
            margin-top: 14px;
            line-height: 1.6;
        }

        /* ── 版本对比表 ────────────── */
        .table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            background: var(--surface);
            border: 1px solid var(--border-light);
            margin: 24px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
            text-align: left;
        }
        thead th {
            background: #f7faf5;
            padding: 15px 18px;
            font-weight: 680;
            font-size: 0.9rem;
            color: var(--text);
            border-bottom: 2px solid var(--border);
        }
        tbody td {
            padding: 14px 18px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        tbody tr:hover {
            background: #f9fcf6;
        }

        /* ── 更新日志 ────────────── */
        .changelog {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .changelog h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--teal);
            margin: 20px 0 8px;
        }
        .changelog h3:first-child {
            margin-top: 0;
        }
        .changelog p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
        }
        .highlight {
            background: var(--teal-light);
            border-radius: 12px;
            padding: 14px 18px;
            margin: 14px 0;
            font-size: 0.9rem;
            color: #1a3d2a;
            border-left: 4px solid var(--teal);
        }

        /* ── FOOTER ────────────────── */
        .footer {
            background: #172418;
            color: #b8c9bb;
            padding: 40px 0 22px;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            margin-top: 40px;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 30px;
        }
        .footer-col h4 {
            color: #fff;
            margin-bottom: 11px;
            font-size: 0.93rem;
            letter-spacing: -0.12px;
        }
        .footer-col a {
            color: #b8c9bb;
            text-decoration: none;
            display: block;
            margin-bottom: 6px;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 28px;
            font-size: 0.8rem;
            border-top: 1px solid #2d402f;
            margin-top: 22px;
            color: #8a9a8c;
        }
        .footer-disclaimer {
            text-align: center;
            font-size: 0.74rem;
            color: #6d7e6f;
            margin-top: 10px;
            line-height: 1.5;
        }
		/* ── 底部 CTA 专有样式 ── */
.cta-section {
    background: linear-gradient(115deg, #16261a 0%, #1f3d25 40%, #162e1c 100%);
    border-radius: var(--radius-xl);
    padding: 48px 34px;
    margin: 48px auto 40px;          /* 上下间距，左右自动居中 */
    text-align: center;
    color: #fff;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-width: 860px;               /* 与下载卡片最大宽度保持一致 */
}

/* CTA 标题 */
.cta-section h2 {
    font-size: clamp(1.5rem, 2.8vw, 2.1rem);
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
    max-width: 600px;              /* 限制文字宽度，阅读更舒适 */
    letter-spacing: -0.3px;
}

/* CTA 描述 */
.cta-section p {
    font-size: 1.02rem;
    opacity: 0.88;
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
    max-width: 600px;
    line-height: 1.6;
}

/* 主按钮（可覆盖内联样式） */
.cta-section .btn-cta {
    background: #fff;
    color: #16261a;
    padding: 14px 40px;
    border-radius: 40px;
    font-weight: 700;
    font-size: 1.03rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 7px 26px rgba(0,0,0,0.18);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}
.cta-section .btn-cta:hover {
    background: #f2fdf5;
    transform: scale(1.03);
    box-shadow: 0 13px 32px rgba(0,0,0,0.26);
}

/* 底部小字的链接 */
.cta-section .sub-links {
    margin-top: 18px;
    font-size: 0.9rem;
    opacity: 0.8;
}
.cta-section .sub-links a {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.cta-section .sub-links a:hover {
    color: #e0f0e0;
}

/* 装饰光晕（增加质感） */
.cta-section::before,
.cta-section::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.cta-section::before {
    top: -55px;
    right: -55px;
    width: 190px;
    height: 190px;
    background: radial-gradient(circle, rgba(60,184,120,0.28) 0%, transparent 70%);
}
.cta-section::after {
    bottom: -35px;
    left: -35px;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
}

/* 响应式微调 */
@media (max-width: 900px) {
    .cta-section {
        padding: 36px 20px;
        border-radius: var(--radius-lg);
        max-width: 100%;
        margin-left: 16px;
        margin-right: 16px;
    }
}

        /* ── RESPONSIVE ────────────── */
        @media (max-width: 900px) {
            .platform-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 20px;
            }
            .nav-bar {
                flex-direction: column;
                align-items: stretch;
            }
            .nav-links {
                gap: 5px;
                font-size: 0.82rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .download-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn-dl,
            .btn-secondary {
                text-align: center;
                justify-content: center;
            }
            .platform-content h2 {
                font-size: 1.4rem;
            }
        }