/* ===== 复用首页全局变量与基础样式 ===== */
        :root {
            --primary-dark: #0D1B2A;
            --primary-mid: #1B2D45;
            --accent-gold: #C9A227;
            --accent-gold-light: #E8C96A;
            --accent-bronze: #B8892B;
            --bg-warm: #FAF8F4;
            --bg-white: #FFFFFF;
            --bg-soft: #F5F1E8;
            --text-primary: #1A1A2E;
            --text-secondary: #3D4F64;
            --text-muted: #6B7F94;
            --border-light: #EDE8DD;
            --shadow-soft: 0 8px 32px -8px rgba(13, 27, 42, 0.08);
            --shadow-hover: 0 20px 48px -12px rgba(13, 27, 42, 0.16);
            --radius-lg: 36px;
            --radius-md: 24px;
            --radius-sm: 16px;
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-warm);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }

        /* ===== 导航栏（复用首页样式） ===== */
        .navbar {
            position: sticky; top: 0; z-index: 1000;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(13, 27, 42, 0.06);
            padding: 10px 0;
        }
        .navbar .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
        .nav-left { display: flex; align-items: center; gap: 6px; }
        .logo-link { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.5rem; letter-spacing: -0.5px; color: var(--primary-dark); }
        .logo-link img { height: 40px; width: auto; border-radius: 10px; box-shadow: 0 2px 12px rgba(13,27,42,0.08); }
        .logo-link .logo-accent { color: var(--accent-gold); font-weight: 800; }
        .nav-links { display: flex; gap: 22px; font-weight: 500; color: var(--text-secondary); flex-wrap: wrap; }
        .nav-links a { font-size: 0.88rem; transition: color 0.25s; position: relative; letter-spacing: 0.2px; }
        .nav-links a::after { content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px; background:var(--accent-gold); transition:width 0.3s; border-radius:2px; }
        .nav-links a:hover::after { width:100%; }
        .nav-links a:hover { color: var(--primary-dark); }
        .nav-right { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
        .btn-download-nav {
            background: linear-gradient(145deg, var(--accent-gold), var(--accent-bronze));
            color: #fff; padding: 9px 26px; border-radius: 60px; font-weight: 700; font-size: 0.95rem;
            box-shadow: 0 2px 16px rgba(201,162,39,0.35); transition: var(--transition); letter-spacing: 0.3px;
        }
        .btn-download-nav:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(201,162,39,0.45); }

        /* ===== 洞察 Hero ===== */
        .blog-hero {
            padding: 70px 0 60px;
            background: linear-gradient(168deg, #F5F1E8 0%, #FAF8F4 50%, #FFFEFB 100%);
            text-align: center; position: relative; overflow: hidden;
        }
        .blog-hero::before {
            content:''; position:absolute; top:-20%; right:-5%; width:550px; height:550px;
            background: radial-gradient(circle, rgba(201,162,39,0.08) 0%, transparent 70%); border-radius:50%; pointer-events:none;
        }
        .blog-hero .container { position: relative; z-index: 2; }
        .blog-hero .eyebrow {
            display: inline-block; background: rgba(201,162,39,0.12); color: var(--accent-bronze);
            padding: 6px 18px; border-radius: 60px; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.5px;
            margin-bottom: 16px; border:1px solid rgba(201,162,39,0.25);
        }
        .blog-hero h1 {
            font-size: 3rem; font-weight: 800; letter-spacing: -0.03em; color: var(--primary-dark); line-height: 1.2;
        }
        .blog-hero h1 .highlight {
            background: linear-gradient(145deg, var(--accent-bronze), var(--accent-gold));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .blog-hero-sub {
            font-size: 1.15rem; color: var(--text-secondary); max-width: 720px; margin: 20px auto 28px; line-height: 1.8;
        }
        .tag-cloud {
            display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 20px;
        }
        .tag-cloud a {
            background: #fff; border:1px solid var(--border-light); padding:6px 18px; border-radius:40px;
            font-size:0.8rem; font-weight:600; color:var(--text-secondary); transition:var(--transition);
        }
        .tag-cloud a:hover { border-color:var(--accent-gold); color:var(--accent-bronze); background:#FFFDF7; }

        /* ===== 通用标题 ===== */
        .section-title {
            font-size: 2.5rem; font-weight: 800; margin-bottom: 50px; text-align: center; color: var(--primary-dark); letter-spacing: -0.02em;
        }
        .section-title span {
            background: linear-gradient(145deg, var(--accent-bronze), var(--accent-gold));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .section-subtitle {
            text-align: center; color: var(--text-secondary); max-width: 720px; margin: -30px auto 50px; font-size: 1.05rem; line-height: 1.7;
        }

        /* ===== 趋势速览卡片 ===== */
        .trends-section {
            padding: 80px 0; background: #ffffff;
        }
        .trend-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px;
        }
        .trend-card {
            background: var(--bg-soft); border-radius: var(--radius-md); padding: 30px 26px;
            border: 1px solid var(--border-light); transition: var(--transition); position: relative; overflow: hidden;
        }
        .trend-card:hover {
            transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(201,162,39,0.3); background: #fff;
        }
        .trend-card .trend-icon { font-size: 2.5rem; display: block; margin-bottom: 14px; }
        .trend-card h3 { font-size: 1.25rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
        .trend-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
        .trend-card .trend-date { font-size: 0.75rem; color: var(--text-muted); margin-top: 14px; display: block; font-weight: 600; letter-spacing: 0.3px; }

        /* ===== 安全指南（HowTo步骤） ===== */
        .guide-section {
            padding: 80px 0; background: var(--bg-soft);
        }
        .guide-steps {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px;
        }
        .guide-step {
            background: #fff; border-radius: var(--radius-md); padding: 28px 22px; text-align: center;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .guide-step:hover { border-color: rgba(201,162,39,0.4); transform: translateY(-4px); box-shadow: var(--shadow-soft); }
        .guide-step .step-number {
            display: inline-block; width: 40px; height: 40px; line-height: 40px; border-radius: 50%;
            background: linear-gradient(145deg, var(--accent-gold), var(--accent-bronze)); color: #fff; font-weight: 800;
            font-size: 1.1rem; margin-bottom: 12px;
        }
        .guide-step h4 { font-size: 1.05rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
        .guide-step p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

        /* ===== 技术深潜：加密协议对比 ===== */
        .tech-section {
            padding: 80px 0; background: #ffffff;
        }
        .protocol-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px;
        }
        .protocol-card {
            background: var(--bg-soft); border-radius: var(--radius-sm); padding: 24px 20px; text-align: center;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .protocol-card:hover { border-color: var(--accent-gold); background: #FFFDF7; }
        .protocol-card .protocol-name { font-weight: 800; font-size: 1.1rem; color: var(--primary-dark); margin-bottom: 6px; }
        .protocol-card .protocol-type { font-size: 0.8rem; color: var(--accent-bronze); font-weight: 700; letter-spacing: 0.5px; }
        .protocol-card p { color: var(--text-secondary); font-size: 0.85rem; margin-top: 8px; line-height: 1.6; }

        /* ===== 实用技巧列表 ===== */
        .tips-section {
            padding: 80px 0; background: var(--bg-soft);
        }
        .tips-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px;
        }
        .tip-card {
            background: #fff; border-radius: var(--radius-sm); padding: 24px 20px; display: flex; gap: 14px;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .tip-card:hover { border-color: rgba(201,162,39,0.3); box-shadow: var(--shadow-soft); }
        .tip-card .tip-emoji { font-size: 2rem; flex-shrink: 0; }
        .tip-card h4 { font-size: 1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 4px; }
        .tip-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

        /* ===== 数据摘要 ===== */
        .data-brief {
            padding: 60px 0; background: var(--primary-dark); color: #fff;
        }
        .data-grid {
            display: flex; flex-wrap: wrap; justify-content: center; gap: 50px; text-align: center;
        }
        .data-item .data-number {
            font-size: 2.8rem; font-weight: 800; color: var(--accent-gold); letter-spacing: -0.02em;
        }
        .data-item .data-label {
            font-size: 0.9rem; color: rgba(255,255,255,0.75); margin-top: 6px; font-weight: 500;
        }

        /* ===== FAQ 快速问答 ===== */
        .faq-section {
            padding: 80px 0; background: #ffffff;
        }
        .faq-list {
            max-width: 800px; margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-soft); border-radius: var(--radius-sm); padding: 22px 28px; margin-bottom: 14px;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(201,162,39,0.3); box-shadow: var(--shadow-soft); }
        .faq-item strong { font-size: 1.05rem; display: block; margin-bottom: 6px; color: var(--primary-dark); font-weight: 700; }
        .faq-item p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

        /* ===== 订阅/CTA ===== */
        .cta-banner {
            padding: 60px 0; background: linear-gradient(145deg, var(--primary-dark), #1B2D45); color: #fff; text-align: center;
        }
        .cta-banner h3 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.02em; }
        .cta-banner p { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 24px; }
        .cta-banner .btn-gold-large {
            background: linear-gradient(145deg, var(--accent-gold), var(--accent-bronze)); color: #fff; padding: 16px 48px;
            border-radius: 60px; font-weight: 700; font-size: 1.1rem; display: inline-block; transition: var(--transition);
            letter-spacing: 0.5px; box-shadow: 0 6px 28px rgba(201,162,39,0.35);
        }
        .cta-banner .btn-gold-large:hover { transform: scale(1.03); box-shadow: 0 12px 40px rgba(201,162,39,0.5); }

        /* ===== 页脚（复用首页） ===== */
        .footer {
            background: var(--primary-dark); color: #B0C4D8; padding: 60px 0 0; border-top: 3px solid var(--accent-gold);
        }
        .footer-main {
            display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo-text { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 800; color: #ffffff; margin-bottom: 14px; }
        .footer-brand .logo-text img { height: 34px; width: auto; border-radius: 8px; }
        .footer-brand .logo-text .footer-gold { color: var(--accent-gold); }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: #8AA0B8; max-width: 280px; }
        .footer-social { display: flex; gap: 12px; margin-top: 18px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 50%;
            background: rgba(255,255,255,0.06); color: #B0C4D8; font-size: 0.9rem; transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.04);
        }
        .footer-social a:hover { background: rgba(201,162,39,0.2); color: var(--accent-gold); transform: translateY(-2px); border-color: rgba(201,162,39,0.3); }
        .footer-col h4 {
            color: #ffffff; font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 0.5px;
            border-bottom: 2px solid rgba(201,162,39,0.3); padding-bottom: 8px; display: inline-block;
        }
        .footer-col ul { list-style: none; margin-top: 8px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: #8AA0B8; font-size: 0.9rem; transition: color 0.25s; position: relative; }
        .footer-col ul li a::before { content:'›'; margin-right:6px; opacity:0.4; transition:opacity 0.25s; color:var(--accent-gold); }
        .footer-col ul li a:hover { color: #ffffff; }
        .footer-col ul li a:hover::before { opacity:1; }
        .footer-bottom {
            padding: 24px 0 28px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px;
        }
        .footer-copy { font-size: 0.85rem; color: #6B8094; }
        .footer-copy .sep { margin: 0 6px; opacity: 0.3; }
        .footer-copy .highlight-link { color: #8AA0B8; transition: color 0.25s; }
        .footer-copy .highlight-link:hover { color: var(--accent-gold); }
        .footer-legal { display: flex; flex-wrap: wrap; gap: 20px; font-size: 0.85rem; }
        .footer-legal a { color: #6B8094; transition: color 0.25s; }
        .footer-legal a:hover { color: var(--accent-gold); }
        .footer-note {
            width: 100%; text-align: center; font-size: 0.75rem; color: #4A6078; padding-top: 14px;
            border-top: 1px solid rgba(255,255,255,0.04); margin-top: 6px; letter-spacing: 0.3px;
        }
        .footer-note span { opacity: 0.6; }

        /* ===== 浮动客服 ===== */
        .floating-chat {
            position: fixed; bottom: 28px; right: 28px; background: linear-gradient(145deg, var(--accent-gold), var(--accent-bronze));
            color: #fff; padding: 14px 26px; border-radius: 60px; box-shadow: 0 8px 28px rgba(201,162,39,0.4);
            font-weight: 700; font-size: 0.95rem; z-index: 999; transition: var(--transition); letter-spacing: 0.3px;
        }
        .floating-chat:hover { transform: scale(1.04); box-shadow: 0 12px 36px rgba(201,162,39,0.5); }
        .floating-chat a { color: #fff; }

        /* ===== 响应式 ===== */
        @media (max-width: 900px) {
            .footer-main { grid-template-columns: 1fr 1fr; gap: 36px; }
            .footer-brand p { max-width: 100%; }
            .blog-hero h1 { font-size: 2.5rem; }
        }
        @media (max-width: 820px) {
            .nav-links { gap: 12px; font-size: 0.78rem; flex-wrap: wrap; justify-content: center; }
            .navbar .container { flex-direction: column; align-items: stretch; gap: 10px; }
            .nav-left, .nav-right { justify-content: center; }
            .blog-hero h1 { font-size: 2.2rem; }
        }
        @media (max-width: 600px) {
            .footer-main { grid-template-columns: 1fr; gap: 28px; }
            .section-title { font-size: 1.8rem; }
            .nav-links { gap: 8px; font-size: 0.72rem; }
            .blog-hero h1 { font-size: 1.9rem; }
            .cta-banner h3 { font-size: 1.6rem; }
            .data-item .data-number { font-size: 2rem; }
        }