/* 科技蓝白 · 全直角硬朗 · 粗边框硬阴影 */
        :root {
            --yy-primary: #2563eb;
            --yy-accent: #06b6d4;
            --yy-bg: #f8fafc;
            --yy-ink: #0f172a;
            --yy-border-w: 3px;
            --yy-shadow: 8px 8px 0 rgba(37, 99, 235, 0.2);
        }
        * { border-radius: 0 !important; font-family: 'Inter', system-ui, sans-serif; }
        body { background: var(--yy-bg); color: var(--yy-ink); font-size: 15px; letter-spacing: 0.1px; }
        h1,h2,h3 { font-weight: 900; letter-spacing: -0.02em; }

        /* 粗边框 & 硬阴影通用类 */
        .yy-thick-border { border: var(--yy-border-w) solid var(--yy-ink); box-shadow: var(--yy-shadow); }
        .yy-card { background: white; border: 3px solid var(--yy-ink); box-shadow: 6px 6px 0 rgba(15, 23, 42, 0.12); transition: transform 0.15s ease, border-color 0.15s; }
        .yy-card:hover { transform: scale(0.98); border-color: var(--yy-primary); box-shadow: 10px 10px 0 rgba(37, 99, 235, 0.2); }

        /* 导航栏吸顶+背景透明度变化 */
        .navbar-yy { transition: all 0.2s; border-bottom: 3px solid var(--yy-ink); background: rgba(248, 250, 252, 0.85); backdrop-filter: blur(6px); }
        .navbar-yy.scrolled { background: rgba(248, 250, 252, 0.95); box-shadow: 0 6px 0 rgba(37,99,235,0.3); }
        .navbar-yy .navbar-brand, .navbar-yy .nav-link { font-weight: 700; color: var(--yy-ink) !important; }
        .navbar-yy .nav-link:hover { color: var(--yy-primary) !important; }
        .navbar-toggler { border: 2px solid var(--yy-ink); }

        /* 关键词标签云 */
        .keyword-cloud { display: flex; flex-wrap: wrap; gap: 0.7rem 1rem; justify-content: center; margin: 1.5rem 0; }
        .keyword-cloud span { font-family: 'Space Mono', 'Courier New', monospace; font-weight: 600; background: white; border: 2px solid var(--yy-ink); padding: 0.2rem 0.9rem; box-shadow: 4px 4px 0 rgba(6,182,212,0.4); font-size: 1rem; }

        /* 时间线 / 步骤条 */
        .step-line { position: relative; padding-left: 2rem; border-left: 4px dashed var(--yy-primary); }
        .step-item { position: relative; margin-bottom: 2rem; }
        .step-item::before { content: attr(data-step); position: absolute; left: -2.7rem; background: var(--yy-primary); color: white; width: 2rem; height: 2rem; display: flex; align-items: center; justify-content: center; font-weight: 800; border: 2px solid var(--yy-ink); font-family: monospace; }

        /* 数字等宽 */
        .mono-data, .step-item::before, .featured-card .badge-num { font-family: 'JetBrains Mono', 'Courier New', monospace; }

        /* 图片占位渐变 */
        .lazy-img-placeholder { background: linear-gradient(145deg, #dbeafe 0%, #e0f2fe 100%); min-height: 140px; display: flex; align-items: center; justify-content: center; color: var(--yy-primary); font-weight: 600; border: 2px solid var(--yy-ink); }

        /* 全局直角 */
        .btn { border-radius: 0; border: 2px solid var(--yy-ink); font-weight: 700; }

        .faq-item { border: 2px solid var(--yy-ink); background: white; margin-bottom: 1rem; padding: 1rem; }
        .faq-question { font-weight: 700; cursor: pointer; }

        /* footer 友情链接区 */
        .friend-links { border-top: 3px solid var(--yy-ink); background: #eef2f6; }

        /* 卡片网格 hover */
        .feature-card { transition: all 0.2s; }

.lazy-img-placeholder { transition: opacity 0.3s; }
    img.lazy-loaded { animation: fadeIn 0.3s; }
    @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* --- 子页面追加 --- */
/* 保证任何bootstrap组件都不会白底黑字破坏视觉 */
        .card, .card-body, .card-title, .card-text, .card-header, .card-footer,
        .form-control, .form-select, .form-label, .input-group-text,
        .table, .list-group-item, .accordion-item, .accordion-button, .accordion-body,
        .modal-content, .modal-header, .modal-body, .dropdown-menu, .dropdown-item,
        .nav-link, .navbar, .navbar-brand, .btn-light, .btn-outline-* {
            background: transparent !important;
            color: var(--yy-ink) !important;
            border-color: var(--yy-primary) !important;
        }
.navbar, .navbar-brand, .nav-link {
            background: var(--yy-bg) !important;
            color: var(--yy-ink) !important;
        }
.nav-link.active {
            font-weight: 700;
            color: var(--yy-primary) !important;
        }
/* 任何卡片或面板都强制使用站点的粗边框与阴影 */
        .yy-card, .card {
            border: var(--yy-border-w) solid var(--yy-primary) !important;
            box-shadow: var(--yy-shadow) !important;
            background: var(--yy-bg) !important;
            color: var(--yy-ink) !important;
        }
/* 确保所有文本都不被bootstrap重置为黑色 */
        body, p, h1, h2, h3, h4, h5, h6, li, span, a, div {
            color: var(--yy-ink);
        }
/* 页脚链接与首页风格一致 */
        .friend-links a {
            color: var(--yy-primary);
            font-weight: 500;
            text-decoration: none;
            border-bottom: 2px solid transparent;
        }
.friend-links a:hover {
            border-bottom-color: var(--yy-accent);
        }
/* 小标题一律带点漫画感 */
        .section-badge {
            font-family: 'Inter', sans-serif;
            font-weight: 800;
            letter-spacing: -0.02em;
            border-left: 8px solid var(--yy-primary);
            padding-left: 0.75rem;
            margin-bottom: 1.5rem;
        }
/* 让关键字云更贴合 */
        .keyword-cloud span {
            background: color-mix(in srgb, var(--yy-primary) 12%, white);
            border: 2px solid var(--yy-primary);
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-block;
            margin: 0.25rem;
            color: var(--yy-ink);
        }
/* 特殊块引用 */
        .philosophy-quote {
            background: color-mix(in srgb, var(--yy-accent) 8%, white);
            border-left: 6px solid var(--yy-accent);
            padding: 1.2rem 1.5rem;
            font-size: 1.1rem;
            font-weight: 500;
            border-radius: 0 20px 20px 0;
        }

/* --- 子页面追加 --- */
/* 本页专属样式(极少) */
        .disclaimer-section {
            padding: 80px 0;
        }
.disclaimer-card {
            background: var(--yy-bg);
            border: var(--yy-border-w) solid var(--yy-primary);
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--yy-shadow);
            margin-bottom: 30px;
        }
.disclaimer-card h2 {
            color: var(--yy-primary);
            font-weight: 800;
            font-size: 1.8rem;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--yy-accent);
        }
.disclaimer-card h3 {
            color: var(--yy-ink);
            font-weight: 700;
            font-size: 1.3rem;
            margin-top: 25px;
            margin-bottom: 12px;
        }
.disclaimer-card p, .disclaimer-card li {
            color: var(--yy-ink);
            line-height: 1.8;
            font-size: 1rem;
        }
.disclaimer-card ul {
            padding-left: 20px;
            margin-bottom: 15px;
        }
.disclaimer-card li {
            margin-bottom: 8px;
        }
.disclaimer-highlight {
            background: rgba(6, 182, 212, 0.08);
            border-left: 4px solid var(--yy-accent);
            padding: 15px 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
.disclaimer-highlight p {
            margin-bottom: 0;
        }
.disclaimer-badge {
            display: inline-block;
            background: var(--yy-primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 8px;
        }
.page-hero {
            background: linear-gradient(135deg, var(--yy-primary) 0%, var(--yy-accent) 100%);
            color: #fff;
            padding: 100px 0 80px;
            margin-bottom: 60px;
            border-bottom: var(--yy-border-w) solid var(--yy-primary);
        }
.page-hero h1 {
            font-weight: 900;
            font-size: 3rem;
            text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
        }
.page-hero p {
            font-size: 1.2rem;
            opacity: 0.95;
        }
.disclaimer-card {
                padding: 25px;
            }
.page-hero {
                padding: 70px 0 50px;
            }
.page-hero h1 {
                font-size: 2.2rem;
            }

/* --- 子页面追加 --- */
/* 保证任何可能引入的bootstrap组件都不破坏深色风格 */
        .navbar-yy, .navbar-yy .nav-link, .navbar-yy .navbar-brand { color: var(--yy-ink) !important; }
.navbar-yy .navbar-toggler { border-color: rgba(15,23,42,.2); }
.navbar-yy .navbar-toggler-icon { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(15,23,42,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e"); }
.card, .card-body, .card-header, .card-footer { background: transparent; color: var(--yy-ink); border-color: var(--yy-primary); }
.list-group-item { background: transparent; color: var(--yy-ink); border-color: rgba(37,99,235,.15); }
.accordion-item, .accordion-button { background: transparent; color: var(--yy-ink); border-color: rgba(37,99,235,.2); }
.accordion-button:not(.collapsed) { background: rgba(37,99,235,.05); color: var(--yy-primary); }
.form-control { background: rgba(255,255,255,.8); color: var(--yy-ink); border: 2px solid var(--yy-primary); }
.form-control::placeholder { color: rgba(15,23,42,.4); }
.dropdown-menu, .dropdown-item { background: #ffffff; color: var(--yy-ink); }
.btn-light { background: var(--yy-accent); border-color: var(--yy-primary); color: var(--yy-ink); }
.btn-outline-primary { border-color: var(--yy-primary); color: var(--yy-primary); }
.table { --bs-table-bg: transparent; color: var(--yy-ink); border-color: rgba(37,99,235,.2); }
.modal-content { background: var(--yy-bg); color: var(--yy-ink); }
/* 确保任何卡片内文字可读 */
        .yy-card { background: rgba(255,255,255,0.7); backdrop-filter: blur(2px); color: var(--yy-ink); }
.yy-card h2, .yy-card h3, .yy-card p { color: var(--yy-ink); }
/* 强调标题风格 */
        .privacy-title { border-left: 6px solid var(--yy-accent); padding-left: 1rem; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }