:root {
            --main: #38bdf8;
            --accent: #a78bfa;
            --bg: #0f172a;
            --text: #e2e8f0;
            --card-bg: #1e293b;
            --border-dim: #334155;
            --glow-highlight: rgba(56, 189, 248, 0.25);
        }

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

        body {
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            background-image: radial-gradient(circle at 1px 1px, #2a3a5a 1px, transparent 1px);
            background-size: 28px 28px;
            overflow-x: hidden;
        }

        /* 拟物厚重风：全局投影+渐变 */
        .neo-card {
            background: linear-gradient(145deg, #1e2b3f, #15202f);
            box-shadow: 0 18px 30px -12px rgba(0, 0, 0, 0.9), 0 6px 12px -6px rgba(56, 189, 248, 0.2), inset 0 1px 2px rgba(255, 255, 255, 0.06);
            border: 1px solid #293a4f;
            border-radius: 28px;
            transition: transform 0.2s ease, box-shadow 0.2s;
        }

        .neo-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 24px 42px -10px rgba(0, 0, 0, 0.9), 0 8px 18px -8px rgba(167, 139, 250, 0.4), inset 0 1px 2px rgba(255, 255, 255, 0.1);
        }

        .glass-nav {
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid #293a4f;
            box-shadow: 0 10px 25px -10px rgba(0, 0, 0, 0.7);
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.7rem;
            letter-spacing: 1px;
            color: var(--main) !important;
            text-shadow: 0 0 15px var(--glow-highlight), 0 2px 4px #000;
        }

        .nav-link {
            color: var(--text) !important;
            font-weight: 500;
            margin: 0 8px;
            transition: color 0.2s;
        }
        .nav-link:hover { color: var(--accent) !important; }

        .btn-main {
            background: linear-gradient(to bottom, #38bdf8, #2a9fe0);
            border: none;
            font-weight: 700;
            padding: 12px 30px;
            border-radius: 60px;
            box-shadow: 0 12px 20px -8px rgba(56, 189, 248, 0.5), inset 0 2px 2px rgba(255,255,255,0.3);
            color: #082032;
            transition: all 0.2s;
        }
        .btn-main:hover {
            background: linear-gradient(to bottom, #4ac2ff, #319ee0);
            box-shadow: 0 16px 26px -8px rgba(56, 189, 248, 0.7), inset 0 2px 4px rgba(255,255,255,0.4);
            color: #02121c;
            transform: scale(1.02);
        }

        .btn-accent {
            background: linear-gradient(to bottom, #a78bfa, #8b5cf6);
            border: none;
            color: #0f0a2c;
            font-weight: 600;
            box-shadow: 0 12px 20px -8px rgba(167, 139, 250, 0.5);
            border-radius: 40px;
        }

        .display-typed {
            font-family: 'Trebuchet MS', 'Segoe UI', cursive, sans-serif;
            font-weight: 800;
            text-shadow: 0 4px 12px rgba(56, 189, 248, 0.6), 0 2px 0 #0f172a;
            letter-spacing: 1.5px;
        }

        /* 打字机效果 */
        .typewriter {
            display: inline-block;
            overflow: hidden;
            white-space: nowrap;
            border-right: 3px solid var(--main);
            animation: blink-caret 0.7s step-end infinite;
            max-width: 100%;
            vertical-align: bottom;
        }

        @keyframes blink-caret {
            50% { border-color: transparent; }
        }

        .timeline-item {
            position: relative;
            padding-left: 2.2rem;
            padding-bottom: 2.2rem;
            border-left: 2px dashed var(--main);
        }
        .timeline-item::before {
            content: "\f111";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: -0.85rem;
            top: 0;
            color: var(--accent);
            background: var(--bg);
            border-radius: 50%;
            font-size: 1.2rem;
        }

        .tab-panel .tab-pane {
            animation: fadeIn 0.3s ease;
        }

        .feature-img-hover {
            overflow: hidden;
            border-radius: 20px;
            position: relative;
            background: #25344a;
            transition: box-shadow 0.3s;
        }
        .feature-img-hover img {
            transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.4, 1);
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .feature-img-hover:hover img {
            transform: scale(1.08);
        }
        .overlay-hover {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.9), transparent 60%);
            opacity: 0;
            transition: opacity 0.3s;
            display: flex;
            align-items: flex-end;
            padding: 1.5rem;
            color: white;
            font-weight: 600;
        }
        .feature-img-hover:hover .overlay-hover {
            opacity: 1;
        }

        /* 回到顶部按钮 */
        .to-top {
            position: fixed;
            bottom: 25px;
            right: 25px;
            z-index: 99;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(145deg, var(--main), #1f8fd6);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 20px rgba(0,0,0,0.5);
            opacity: 0;
            visibility: hidden;
            transition: 0.3s;
            border: none;
            color: #021a2a;
            font-size: 1.5rem;
            pointer-events: none;
        }
        .to-top.visible {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        /* 图片懒加载渐显 */
        img[data-src] {
            background: #1f2c3f;
            filter: blur(20px);
            opacity: 0.6;
            transition: filter 0.3s, opacity 0.3s;
        }
        img.loaded {
            filter: blur(0);
            opacity: 1;
        }

        footer {
            border-top: 1px solid #26364b;
            background: #0a111f;
        }
        .friend-links a {
            color: var(--accent);
            text-decoration: none;
            margin: 0 12px;
        }

        h1, h2, h3 {
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        .stat-num {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(to right, var(--main), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

/* --- 子页面追加 --- */
.about-hero {
            background: radial-gradient(ellipse at 30% 20%, rgba(56, 189, 248, 0.12) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 80%, rgba(167, 139, 250, 0.08) 0%, transparent 50%);
            padding: 100px 0 80px;
            border-bottom: 1px solid var(--border-dim);
        }
.about-container {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 24px;
        }
.about-section {
            padding: 70px 0;
            border-bottom: 1px solid var(--border-dim);
        }
.about-section:last-child {
            border-bottom: none;
        }
.about-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            background: rgba(56, 189, 248, 0.12);
            color: var(--main);
            border: 1px solid rgba(56, 189, 248, 0.3);
            margin-bottom: 20px;
        }
.about-h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
.about-h2 span {
            color: var(--main);
        }
.about-p {
            font-size: 1.05rem;
            line-height: 1.8;
            color: rgba(226, 232, 240, 0.85);
            margin-bottom: 18px;
        }
.about-p strong {
            color: var(--text);
            font-weight: 600;
        }
.about-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }
.about-stat {
            text-align: center;
            padding: 24px 16px;
            border-radius: 16px;
            background: rgba(30, 41, 59, 0.6);
            border: 1px solid var(--border-dim);
        }
.about-stat .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--main);
            line-height: 1.2;
        }
.about-stat .stat-label {
            font-size: 0.9rem;
            color: rgba(226, 232, 240, 0.7);
            margin-top: 6px;
        }
.about-values {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 36px;
        }
.about-value-item {
            padding: 24px;
            border-radius: 16px;
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            transition: border-color 0.3s ease, transform 0.3s ease;
        }
.about-value-item:hover {
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-4px);
        }
.about-value-item i {
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 14px;
        }
.about-value-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }
.about-value-item p {
            font-size: 0.95rem;
            line-height: 1.6;
            color: rgba(226, 232, 240, 0.75);
            margin: 0;
        }
.about-quote {
            margin: 40px 0;
            padding: 30px 32px;
            border-left: 3px solid var(--main);
            border-radius: 0 12px 12px 0;
            background: rgba(56, 189, 248, 0.06);
        }
.about-quote p {
            font-size: 1.1rem;
            font-style: italic;
            color: var(--text);
            line-height: 1.7;
            margin: 0;
        }
.about-quote cite {
            display: block;
            margin-top: 12px;
            font-size: 0.9rem;
            font-style: normal;
            color: rgba(226, 232, 240, 0.6);
        }
.about-hero { padding: 70px 0 50px; }
.about-section { padding: 50px 0; }
.about-h2 { font-size: 1.6rem; }
.about-p { font-size: 1rem; }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .privacy-hero {
            background: linear-gradient(135deg, var(--bg) 0%, rgba(56, 189, 248, 0.08) 50%, var(--bg) 100%);
            padding: 5rem 0 3rem;
            position: relative;
        }
.privacy-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--main), transparent);
        }
.privacy-section {
            padding: 2.5rem 0;
            border-bottom: 1px solid var(--border-dim);
        }
.privacy-section:last-child {
            border-bottom: none;
        }
.privacy-section h2 {
            color: var(--main);
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
            position: relative;
            padding-left: 1rem;
        }
.privacy-section h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.25rem;
            width: 3px;
            height: 1.25rem;
            background: var(--accent);
            border-radius: 2px;
        }
.privacy-section p {
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 1rem;
        }
.privacy-section ul, .privacy-section ol {
            color: var(--text);
            line-height: 1.8;
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
.privacy-section li {
            margin-bottom: 0.5rem;
        }
.privacy-section strong {
            color: var(--accent);
        }
.privacy-section a {
            color: var(--main);
            text-decoration: none;
        }
.privacy-section a:hover {
            text-decoration: underline;
        }
.privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            transition: border-color 0.3s ease;
        }
.privacy-card:hover {
            border-color: var(--main);
        }
.privacy-card i {
            color: var(--accent);
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
.privacy-card h3 {
            color: var(--text);
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
.privacy-card p {
            font-size: 0.95rem;
        }
.update-date {
            display: inline-block;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.3);
            color: var(--main);
            padding: 0.35rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
        }
.privacy-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--main), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
.privacy-hero .lead {
            color: var(--text);
            font-size: 1.1rem;
            max-width: 800px;
            margin: 0 auto;
        }
.toc {
            background: var(--card-bg);
            border: 1px solid var(--border-dim);
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
        }
.toc h3 {
            color: var(--main);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
.toc a {
            color: var(--text);
            text-decoration: none;
            display: block;
            padding: 0.3rem 0;
            transition: color 0.3s;
            font-size: 0.95rem;
        }
.toc a:hover {
            color: var(--main);
        }
.toc a i {
            font-size: 0.8rem;
            margin-right: 0.5rem;
            color: var(--accent);
        }
.last-updated {
            text-align: center;
            margin-top: 2rem;
            color: var(--text);
            opacity: 0.7;
            font-size: 0.9rem;
        }
.contact-box {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.05), rgba(167, 139, 250, 0.05));
            border: 1px solid var(--border-dim);
            border-radius: 12px;
            padding: 2rem;
            text-align: center;
        }
.contact-box h3 {
            color: var(--main);
            margin-bottom: 1rem;
        }
.contact-box p {
            margin-bottom: 0.5rem;
        }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-item { background:rgba(255,255,255,.04) !important; color:#e2e8f0 !important; border-color:rgba(255,255,255,.12) !important; }
.accordion-button { background:rgba(255,255,255,.04) !important; color:#e2e8f0 !important; }
.accordion-body { background:transparent !important; color:#e2e8f0 !important; }
.accordion-header { background:transparent !important; }
.accordion-button::after { filter: invert(1) grayscale(1) brightness(2); }