/* 全局样式 — 移动优先，干净快速 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        body {
            background-color: #f5f7fa;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }
        a {
            text-decoration: none;
            color: #2563eb;
        }
        /* 布局容器 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        /* 头部区域 */
        .site-header {
            background-color: #ffffff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 10;
        }
        .header-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 700;
            color: #0f172a;
            letter-spacing: -0.5px;
        }
        .logo span {
            color: #2563eb;
            font-weight: 300;
        }
        .main-nav {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #334155;
            font-weight: 500;
            padding: 0.3rem 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            border-bottom-color: #2563eb;
            color: #0f172a;
        }
        .search-form {
            display: flex;
            margin-top: 0.5rem;
            width: 100%;
            max-width: 320px;
        }
        .search-form input {
            flex: 1;
            padding: 0.6rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 40px 0 0 40px;
            outline: none;
            font-size: 0.95rem;
        }
        .search-form button {
            background-color: #2563eb;
            border: none;
            color: white;
            padding: 0 1.3rem;
            border-radius: 0 40px 40px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
        }
        .search-form button:hover {
            background-color: #1d4ed8;
        }
        /* 面包屑 */
        .breadcrumb {
            margin-top: 1.5rem;
            font-size: 0.9rem;
            color: #64748b;
        }
        .breadcrumb a {
            color: #2563eb;
        }
        .breadcrumb i {
            margin: 0 0.3rem;
            font-size: 0.7rem;
            color: #94a3b8;
        }
        /* 分类快速导航 (锚点) */
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin: 1.8rem 0 1rem;
        }
        .category-tags a {
            background-color: #e2e8f0;
            padding: 0.4rem 1.2rem;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: #1e293b;
            transition: 0.2s;
            border: 1px solid transparent;
        }
        .category-tags a:hover {
            background-color: #2563eb;
            color: white;
            border-color: #2563eb;
        }
        /* 主标题 */
        h1 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2rem 0 0.2rem;
            color: #0f172a;
        }
        .sub-title {
            color: #475569;
            margin-bottom: 2.5rem;
            border-left: 4px solid #2563eb;
            padding-left: 1rem;
            font-weight: 400;
        }
        /* 分类区块 */
        .software-section {
            margin-bottom: 3rem;
            scroll-margin-top: 5rem;  /* 锚点偏移，不被固定头遮挡 */
        }
        .section-heading {
            font-size: 1.8rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .section-heading i {
            color: #2563eb;
            font-size: 1.8rem;
        }
        /* 卡片网格 */
        .software-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.8rem;
        }
        .card {
            background: white;
            border-radius: 20px;
            padding: 1.5rem 1.2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            transition: transform 0.2s, box-shadow 0.2s;
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
        }
        .card-icon {
            font-size: 2.6rem;
            margin-bottom: 0.8rem;
            color: #2563eb;
            background: #eef2ff;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 18px;
        }
        .card h3 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
        }
        .card h3 a {
            color: #0f172a;
        }
        .card h3 a:hover {
            color: #2563eb;
        }
        .card-desc {
            color: #475569;
            font-size: 0.95rem;
            margin: 0.5rem 0 0.8rem;
            flex: 1;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.8rem 1rem;
            margin: 0.7rem 0 1rem;
            font-size: 0.9rem;
            color: #64748b;
        }
        .meta-info i {
            margin-right: 0.2rem;
            color: #2563eb;
            width: 1rem;
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            color: #f59e0b;
        }
        .rating span {
            color: #475569;
            margin-left: 0.3rem;
            font-weight: 400;
        }
        .download-btn {
            background-color: #2563eb;
            color: white;
            border: none;
            padding: 0.75rem 1rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            transition: background 0.15s;
            margin-top: 0.5rem;
            border: 1px solid #2563eb;
        }
        .download-btn i {
            font-size: 0.9rem;
        }
        .download-btn:hover {
            background-color: #1d4ed8;
            border-color: #1d4ed8;
        }
        /* 底部区域 */
        .site-footer {
            background-color: #ffffff;
            margin-top: 4rem;
            padding: 2.5rem 0 2rem;
            border-top: 1px solid #e2e8f0;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.8rem;
            margin-bottom: 1.5rem;
        }
        .footer-links a {
            color: #334155;
            font-size: 0.95rem;
        }
        .footer-links a:hover {
            color: #2563eb;
        }
        .copyright {
            text-align: center;
            color: #64748b;
            font-size: 0.9rem;
        }
        /* 热门关键词区（内链丰富） */
        .hot-keywords {
            background: #f1f4f9;
            border-radius: 48px;
            padding: 1rem 1.8rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 1rem 1.8rem;
            margin: 2rem 0 1rem;
        }
        .hot-keywords span {
            font-weight: 600;
            color: #0f172a;
        }
        .hot-keywords a {
            color: #2563eb;
            font-size: 0.95rem;
        }
        .hot-keywords a:hover {
            text-decoration: underline;
        }
        /* 操作系统标签小点缀 */
        .os-tag {
            background-color: #e2e8f0;
            padding: 0.2rem 0.6rem;
            border-radius: 30px;
            font-size: 0.75rem;
            color: #334155;
            display: inline-block;
        }
        hr {
            border: none;
            border-top: 1px solid #e2e8f0;
            margin: 1rem 0;
        }
        /* 小屏幕适应 */
        @media (max-width: 640px) {
            .header-inner {
                flex-direction: column;
                align-items: stretch;
            }
            .main-nav {
                margin: 0.8rem 0;
                justify-content: center;
            }
            .search-form {
                max-width: 100%;
            }
            .section-heading {
                font-size: 1.6rem;
            }
        }