/* ===== 全局变量与基础（与首页完全一致） ===== */
        :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); }

        /* ===== 服务 Hero ===== */
        .service-hero {
            padding: 70px 0 80px;
            background: linear-gradient(168deg, #F5F1E8 0%, #FAF8F4 50%, #FFFEFB 100%);
            text-align: center; position: relative; overflow: hidden;
        }
        .service-hero::before {
            content:''; position:absolute; top:-20%; right:-10%; width:600px; height:600px;
            background: radial-gradient(circle, rgba(201,162,39,0.08) 0%, transparent 70%); border-radius:50%; pointer-events:none;
        }
        .service-hero .container { position: relative; z-index: 2; }
        .service-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);
        }
        .service-hero h1 {
            font-size: 3.2rem; font-weight: 800; letter-spacing: -0.03em; color: var(--primary-dark); line-height: 1.2;
        }
        .service-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;
        }
        .service-hero-sub {
            font-size: 1.15rem; color: var(--text-secondary); max-width: 760px; margin: 20px auto 30px; line-height: 1.8;
        }
        .service-badge {
            display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 20px;
        }
        .service-badge span {
            background: #fff; border:1px solid var(--border-light); padding:8px 20px; border-radius:40px;
            font-size:0.8rem; font-weight:600; color:var(--text-secondary); transition:var(--transition);
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
        }
        .service-badge span: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: -20px auto 50px; font-size: 1.05rem; line-height: 1.7;
        }

        /* ===== 服务特色双栏卡片 ===== */
        .service-features {
            padding: 80px 0; background: #ffffff;
        }
        .feature-duo-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 40px;
        }
        .feature-duo-card {
            background: var(--bg-soft); border-radius: var(--radius-md); padding: 38px 30px;
            border: 1px solid var(--border-light); transition: var(--transition); position: relative; overflow: hidden;
        }
        .feature-duo-card:hover {
            transform: translateY(-8px); box-shadow: var(--shadow-hover); border-color: rgba(201,162,39,0.3); background: #fff;
        }
        .feature-duo-card .duo-icon { font-size: 3.2rem; display: block; margin-bottom: 16px; }
        .feature-duo-card h3 { font-size: 1.5rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 12px; }
        .feature-duo-card p { color: var(--text-secondary); font-size: 0.98rem; line-height: 1.7; margin-bottom: 16px; }
        .feature-duo-card ul { list-style: none; }
        .feature-duo-card ul li {
            color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 8px; padding-left: 24px; position: relative;
        }
        .feature-duo-card ul li::before {
            content: '✓'; position: absolute; left: 0; top: 0; color: var(--accent-bronze); font-weight: 700;
        }

        /* ===== 加密技术流程（创意版块） ===== */
        .encryption-flow-section {
            padding: 80px 0; background: var(--primary-dark); color: #fff;
        }
        .encryption-flow-section .section-title { color: #fff; }
        .encryption-flow-section .section-title span {
            background: linear-gradient(145deg, var(--accent-gold-light), var(--accent-gold));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .flow-encryption-steps {
            display: flex; flex-wrap: wrap; justify-content: center; gap: 26px; margin-top: 40px;
        }
        .encryption-step {
            flex: 1 1 180px; max-width: 240px; background: rgba(255,255,255,0.06);
            border:1px solid rgba(255,255,255,0.1); border-radius: var(--radius-md); padding: 28px 22px; text-align: center;
            transition: var(--transition);
        }
        .encryption-step:hover { background: rgba(255,255,255,0.1); border-color: rgba(201,162,39,0.4); transform: translateY(-4px); }
        .encryption-step .step-icon { font-size: 2.4rem; display: block; margin-bottom: 12px; }
        .encryption-step h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
        .encryption-step p { font-size: 0.85rem; color: rgba(255,255,255,0.75); line-height: 1.6; }
        .encryption-arrow {
            display: flex; align-items: center; color: var(--accent-gold); font-size: 1.8rem; font-weight: 800;
        }

        /* ===== 全球节点分布 ===== */
        .nodes-section {
            padding: 80px 0; background: #ffffff;
        }
        .node-regions {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-top: 40px;
        }
        .node-region {
            background: var(--bg-soft); border-radius: var(--radius-sm); padding: 24px 18px; text-align: center;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .node-region:hover { border-color: rgba(201,162,39,0.3); background: #FFFDF7; transform: translateY(-4px); }
        .node-region .region-flag { font-size: 2.2rem; display: block; margin-bottom: 8px; }
        .node-region h4 { font-size: 1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 4px; }
        .node-region p { color: var(--text-secondary); font-size: 0.85rem; }

        /* ===== 速度对比图（创意版块） ===== */
        .speed-section {
            padding: 80px 0; background: var(--bg-soft);
        }
        .speed-chart {
            max-width: 800px; margin: 40px auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 40px;
        }
        .speed-bar-group {
            flex: 1 1 260px; text-align: center;
        }
        .speed-bar-group h4 { font-size: 1rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 10px; }
        .bar-container {
            background: #fff; border-radius: 20px; height: 28px; width: 100%; overflow: hidden; border:1px solid var(--border-light);
        }
        .bar-fill {
            height: 100%; border-radius: 20px; background: linear-gradient(90deg, var(--accent-gold-light), var(--accent-gold), var(--accent-bronze));
            width: 0%; transition: width 1.5s ease-in-out;
        }
        .speed-bar-group .speed-label {
            font-size: 0.85rem; color: var(--text-secondary); margin-top: 8px;
        }
        .speed-note {
            text-align: center; color: var(--text-muted); font-size: 0.9rem; margin-top: 30px; font-style: italic;
        }

        /* ===== 场景解决方案 ===== */
        .scenarios-section {
            padding: 80px 0; background: #ffffff;
        }
        .scenario-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 26px; margin-top: 40px;
        }
        .scenario-card {
            background: var(--bg-soft); border-radius: var(--radius-md); padding: 32px 26px;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .scenario-card:hover { border-color: rgba(201,162,39,0.3); background: #FFFDF7; transform: translateY(-6px); box-shadow: var(--shadow-soft); }
        .scenario-card .scenario-icon { font-size: 2.6rem; display: block; margin-bottom: 14px; }
        .scenario-card h4 { font-size: 1.2rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
        .scenario-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

        /* ===== 安全保障 ===== */
        .security-service-section {
            padding: 80px 0; background: var(--primary-dark); color: #fff;
        }
        .security-service-section .section-title { color: #fff; }
        .security-service-section .section-title span {
            background: linear-gradient(145deg, var(--accent-gold-light), var(--accent-gold));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .security-service-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; margin-top: 40px;
        }
        .security-service-card {
            background: rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius-md); padding: 28px 22px; text-align: center; transition: var(--transition);
        }
        .security-service-card:hover { background: rgba(255,255,255,0.1); border-color: rgba(201,162,39,0.4); }
        .security-service-card .sec-icon { font-size: 2.4rem; display: block; margin-bottom: 10px; }
        .security-service-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
        .security-service-card p { font-size: 0.85rem; color: rgba(255,255,255,0.75); line-height: 1.6; }

        /* ===== 用户评价 ===== */
        .testimonial-service-section {
            padding: 80px 0; background: var(--bg-soft);
        }
        .testimonial-service-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 40px;
        }
        .testimonial-service-card {
            background: #fff; border-radius: var(--radius-md); padding: 28px 24px;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .testimonial-service-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(201,162,39,0.25); }
        .testimonial-service-card .quote-text {
            color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; font-style: italic; margin-bottom: 16px;
        }
        .testimonial-service-card .quote-author {
            display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--primary-dark); font-size: 0.9rem;
        }
        .testimonial-service-card .quote-author .avatar {
            width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(145deg, var(--accent-gold), var(--accent-bronze));
            display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700;
        }
        .testimonial-service-card .quote-author .stars { color: var(--accent-gold); margin-left: auto; font-size: 0.8rem; letter-spacing: 1px; }

        /* ===== FAQ ===== */
        .faq-service-section {
            padding: 80px 0; background: #ffffff;
        }
        .faq-service-list {
            max-width: 800px; margin: 0 auto;
        }
        .faq-service-item {
            background: var(--bg-soft); border-radius: var(--radius-sm); margin-bottom: 14px;
            border:1px solid var(--border-light); transition: var(--transition);
        }
        .faq-service-item summary {
            padding: 20px 28px; font-weight: 700; color: var(--primary-dark); cursor: pointer;
            list-style: none; display: flex; align-items: center; justify-content: space-between;
            font-size: 1.02rem;
        }
        .faq-service-item summary::-webkit-details-marker { display: none; }
        .faq-service-item summary::after {
            content: '+'; font-size: 1.5rem; color: var(--accent-bronze); font-weight: 400; transition: transform 0.3s;
        }
        .faq-service-item[open] summary::after {
            content: '−'; transform: rotate(180deg);
        }
        .faq-service-item .faq-answer {
            padding: 0 28px 22px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7;
        }

        /* ===== CTA 区域 ===== */
        .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: 15px 44px;
            border-radius: 60px; font-weight: 700; font-size: 1.05rem; 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%; }
            .service-hero h1 { font-size: 2.5rem; }
            .encryption-arrow { display: none; }
        }
        @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; }
            .service-hero h1 { font-size: 2.2rem; }
            .speed-chart { gap: 20px; }
        }
        @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; }
            .service-hero h1 { font-size: 1.9rem; }
            .cta-banner h3 { font-size: 1.6rem; }
            .feature-duo-grid, .node-regions, .security-service-grid, .scenario-grid { grid-template-columns: 1fr; }
            .encryption-flow-steps { flex-direction: column; align-items: center; }
        }