/* roulang page: index */
:root {
            --c-primary: #1a5d8f;
            --c-primary-dark: #0e4268;
            --c-primary-light: #e8f0f7;
            --c-accent: #c8956c;
            --c-accent-light: #f5ede4;
            --c-bg: #f5f7fa;
            --c-white: #ffffff;
            --c-text: #1a1a2e;
            --c-text-light: #5a6b7d;
            --c-text-lighter: #8a9aab;
            --c-border: #e0e6ed;
            --c-success: #2d8f5c;
            --c-warning: #e6a23c;
            --c-danger: #d94f4f;
            --c-dark-bg: #142b3f;
            --c-dark-text: #e8eef3;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.07);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 60px rgba(0,0,0,0.14);
            --font-base: "PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
            --sp-xs: 4px;
            --sp-sm: 8px;
            --sp-md: 16px;
            --sp-lg: 24px;
            --sp-xl: 32px;
            --sp-2xl: 48px;
            --sp-3xl: 64px;
            --sp-4xl: 80px;
            --sp-section: clamp(48px, 7vw, 80px);
            --transition-base: all 0.25s ease-in-out;
            --transition-bounce: all 0.35s cubic-bezier(0.34,1.56,0.64,1);
            --max-width: 1200px;
            --header-height: 68px;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
        body{font-family:var(--font-base);font-size:16px;line-height:1.7;color:var(--c-text);background:var(--c-bg);overflow-x:hidden;}
        img{max-width:100%;height:auto;display:block;border:0;}
        a{text-decoration:none;color:inherit;transition:var(--transition-base);}
        ul,ol{list-style:none;}
        button,input,select,textarea{font-family:inherit;font-size:inherit;border:0;outline:0;background:none;}
        button{cursor:pointer;}
        h1,h2,h3,h4,h5,h6{line-height:1.35;font-weight:700;color:var(--c-text);}
        .container{max-width:var(--max-width);margin:0 auto;padding:0 var(--sp-lg);}
        .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
        :focus-visible{outline:3px solid var(--c-primary);outline-offset:2px;border-radius:var(--radius-sm);}
        ::selection{background:var(--c-primary);color:#fff;}

        /* ====== Header / Nav ====== */
        .site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--header-height);background:rgba(255,255,255,0.96);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--c-border);box-shadow:0 1px 12px rgba(0,0,0,0.04);transition:var(--transition-base);}
        .site-header .container{display:flex;align-items:center;justify-content:space-between;height:100%;}
        .nav-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--c-text);letter-spacing:0.02em;white-space:nowrap;}
        .nav-logo .logo-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--c-primary),var(--c-primary-dark));color:#fff;font-size:18px;flex-shrink:0;}
        .nav-logo .logo-name{color:var(--c-primary);font-size:17px;}
        .nav-links{display:flex;align-items:center;gap:var(--sp-xs);}
        .nav-links a{display:flex;align-items:center;gap:6px;padding:8px 16px;border-radius:50px;font-size:15px;font-weight:500;color:var(--c-text);transition:var(--transition-base);}
        .nav-links a:hover{background:var(--c-primary-light);color:var(--c-primary);}
        .nav-links a.active{background:var(--c-primary);color:#fff;}
        .nav-actions{display:flex;align-items:center;gap:var(--sp-sm);}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 24px;border-radius:50px;font-size:15px;font-weight:600;letter-spacing:0.01em;transition:var(--transition-bounce);white-space:nowrap;line-height:1.4;}
        .btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 4px 16px rgba(26,93,143,0.30);}
        .btn-primary:hover{background:var(--c-primary-dark);box-shadow:0 6px 24px rgba(26,93,143,0.40);transform:translateY(-2px);}
        .btn-outline{background:transparent;color:var(--c-primary);border:2px solid var(--c-primary);}
        .btn-outline:hover{background:var(--c-primary);color:#fff;transform:translateY(-2px);}
        .btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 4px 16px rgba(200,149,108,0.35);}
        .btn-accent:hover{background:#b8845a;box-shadow:0 6px 24px rgba(200,149,108,0.45);transform:translateY(-2px);}
        .btn-light{background:#fff;color:var(--c-primary);box-shadow:var(--shadow-md);}
        .btn-light:hover{background:var(--c-primary-light);transform:translateY(-2px);}
        .btn-sm{padding:8px 18px;font-size:14px;}
        .btn-lg{padding:14px 32px;font-size:16px;}
        .btn-block{width:100%;}
        .nav-toggle{display:none;flex-direction:column;gap:5px;background:none;padding:8px;border-radius:var(--radius-sm);}
        .nav-toggle span{display:block;width:24px;height:2px;background:var(--c-text);border-radius:2px;transition:var(--transition-base);}
        .nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
        .nav-toggle.active span:nth-child(2){opacity:0;}
        .nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
        @media(max-width:768px){
            .nav-links{position:fixed;top:var(--header-height);left:0;right:0;flex-direction:column;background:#fff;padding:var(--sp-lg);gap:var(--sp-sm);box-shadow:var(--shadow-lg);transform:translateY(-110%);opacity:0;pointer-events:none;transition:var(--transition-base);border-bottom:1px solid var(--c-border);}
            .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto;}
            .nav-links a{width:100%;justify-content:center;padding:14px;}
            .nav-actions .btn{display:none;}
            .nav-toggle{display:flex;}
            .site-header .container{justify-content:space-between;}
        }

        /* ====== Hero ====== */
        .hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:calc(var(--header-height) + 40px) 0 60px;background:var(--c-dark-bg);overflow:hidden;}
        .hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:0.35;z-index:1;}
        .hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(14,42,62,0.92) 0%,rgba(14,42,62,0.70) 40%,rgba(14,42,62,0.40) 100%);z-index:2;}
        .hero .container{position:relative;z-index:3;max-width:var(--max-width);}
        .hero-inner{display:grid;grid-template-columns:1.1fr 0.9fr;gap:var(--sp-2xl);align-items:center;}
        .hero-content .hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:50px;background:rgba(255,255,255,0.12);color:var(--c-dark-text);font-size:13px;font-weight:600;letter-spacing:0.04em;border:1px solid rgba(255,255,255,0.2);margin-bottom:var(--sp-lg);}
        .hero-content h1{color:#fff;font-size:clamp(26px,4vw,44px);font-weight:800;letter-spacing:0.015em;margin-bottom:var(--sp-md);line-height:1.3;}
        .hero-content .hero-desc{color:rgba(232,238,243,0.88);font-size:16px;line-height:1.8;margin-bottom:var(--sp-xl);max-width:580px;}
        .hero-buttons{display:flex;flex-wrap:wrap;gap:var(--sp-md);margin-bottom:var(--sp-xl);}
        .hero-stats{display:flex;flex-wrap:wrap;gap:var(--sp-lg);padding-top:var(--sp-lg);border-top:1px solid rgba(255,255,255,0.15);}
        .hero-stat{text-align:left;}
        .hero-stat .stat-num{font-size:28px;font-weight:800;color:#fff;letter-spacing:-0.01em;}
        .hero-stat .stat-label{font-size:13px;color:rgba(232,238,243,0.65);margin-top:2px;}
        .hero-visual{position:relative;display:flex;flex-direction:column;gap:var(--sp-md);}
        .hero-card{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.14);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-xl);padding:var(--sp-xl);color:#fff;}
        .hero-card .card-label{font-size:13px;font-weight:600;letter-spacing:0.05em;text-transform:uppercase;color:var(--c-accent);margin-bottom:var(--sp-sm);}
        .hero-card .card-title{font-size:20px;font-weight:700;margin-bottom:var(--sp-md);color:#fff;}
        .group-progress{display:flex;align-items:center;gap:var(--sp-md);margin-bottom:var(--sp-md);}
        .progress-bar{flex:1;height:8px;border-radius:10px;background:rgba(255,255,255,0.15);overflow:hidden;}
        .progress-bar .fill{height:100%;border-radius:10px;background:linear-gradient(90deg,var(--c-accent),var(--c-warning));width:65%;transition:var(--transition-base);}
        .group-progress .progress-text{font-size:14px;font-weight:600;color:rgba(232,238,243,0.9);white-space:nowrap;}
        .hero-card .mini-list{margin-top:var(--sp-lg);display:flex;flex-direction:column;gap:var(--sp-sm);}
        .hero-card .mini-list li{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(232,238,243,0.8);}
        .hero-card .mini-list i{color:var(--c-accent);font-size:14px;flex-shrink:0;}
        .hero-card .card-divider{height:1px;background:rgba(255,255,255,0.12);margin:var(--sp-lg) 0;}
        .group-count{font-size:14px;color:rgba(232,238,243,0.7);line-height:1.6;}
        @media(max-width:1024px){
            .hero-inner{grid-template-columns:1fr;gap:var(--sp-xl);}
            .hero-visual{max-width:520px;}
        }
        @media(max-width:768px){
            .hero{min-height:auto;padding:calc(var(--header-height) + 32px) 0 var(--sp-2xl);}
            .hero-content h1{font-size:24px;}
            .hero-content .hero-desc{font-size:15px;}
            .hero-buttons .btn{flex:1;justify-content:center;}
            .hero-stats{gap:var(--sp-md);}
            .hero-stat .stat-num{font-size:22px;}
        }

        /* ====== Section base ====== */
        .section{padding:var(--sp-section) 0;}
        .section-light{background:var(--c-white);}
        .section-gray{background:var(--c-bg);}
        .section-dark{background:var(--c-dark-bg);color:var(--c-dark-text);}
        .section-dark h2,.section-dark h3{color:#fff;}
        .section-dark .section-sub{color:rgba(232,238,243,0.7);}
        .section-header{margin-bottom:var(--sp-2xl);max-width:680px;}
        .section-header.center{margin-left:auto;margin-right:auto;text-align:center;}
        .section-tag{display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:50px;font-size:13px;font-weight:600;letter-spacing:0.03em;color:var(--c-primary);background:var(--c-primary-light);margin-bottom:var(--sp-md);}
        .section-tag i{font-size:12px;}
        .section-title{font-size:clamp(22px,3vw,34px);font-weight:800;letter-spacing:0.01em;margin-bottom:var(--sp-md);color:var(--c-text);}
        .section-dark .section-title{color:#fff;}
        .section-sub{font-size:15px;color:var(--c-text-light);line-height:1.8;}

        /* ====== Brand Story ====== */
        .story-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-2xl);align-items:center;}
        .story-image{position:relative;border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-lg);}
        .story-image img{width:100%;height:400px;object-fit:cover;}
        .story-image .badge-float{position:absolute;bottom:var(--sp-lg);left:var(--sp-lg);background:rgba(255,255,255,0.94);backdrop-filter:blur(8px);border-radius:var(--radius-md);padding:var(--sp-md) var(--sp-lg);box-shadow:var(--shadow-md);font-size:14px;font-weight:600;color:var(--c-text);display:flex;align-items:center;gap:8px;}
        .story-image .badge-float i{color:var(--c-primary);}
        .story-content .story-points{margin-top:var(--sp-lg);display:flex;flex-direction:column;gap:var(--sp-md);}
        .story-points li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--c-text-light);line-height:1.7;}
        .story-points li i{color:var(--c-success);font-size:16px;margin-top:4px;flex-shrink:0;}
        .story-points li strong{color:var(--c-text);}
        @media(max-width:1024px){
            .story-grid{grid-template-columns:1fr;gap:var(--sp-xl);}
            .story-image img{height:300px;}
        }

        /* ====== Feature Cards ====== */
        .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-lg);}
        .feature-card{background:var(--c-white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--c-border);transition:var(--transition-base);}
        .feature-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);}
        .feature-card .card-img{position:relative;height:220px;overflow:hidden;}
        .feature-card .card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease;}
        .feature-card:hover .card-img img{transform:scale(1.06);}
        .feature-card .card-body{padding:var(--sp-lg);}
        .feature-card .card-body h3{font-size:17px;font-weight:700;margin-bottom:var(--sp-sm);}
        .feature-card .card-body p{font-size:14px;color:var(--c-text-light);line-height:1.7;margin-bottom:var(--sp-md);}
        .feature-card .card-link{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px;}
        .feature-card .card-link:hover{gap:10px;}
        .tag-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:50px;font-size:12px;font-weight:600;background:var(--c-accent-light);color:var(--c-accent);}
        @media(max-width:768px){
            .feature-grid{grid-template-columns:1fr;gap:var(--sp-md);}
            .feature-card .card-img{height:180px;}
        }

        /* ====== Testimonials ====== */
        .testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-lg);}
        .testimonial-bubble{background:var(--c-white);border-radius:var(--radius-lg);padding:var(--sp-lg);border:1px solid var(--c-border);box-shadow:var(--shadow-sm);position:relative;transition:var(--transition-base);display:flex;flex-direction:column;gap:var(--sp-md);}
        .testimonial-bubble:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);}
        .testimonial-bubble::before{content:'"';font-size:48px;color:var(--c-accent);line-height:1;font-family:Georgia,serif;opacity:0.5;}
        .testimonial-bubble .quote{font-size:14px;line-height:1.75;color:var(--c-text-light);flex:1;}
        .testimonial-author{display:flex;align-items:center;gap:10px;}
        .author-avatar{width:36px;height:36px;border-radius:50%;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0;}
        .author-name{font-size:14px;font-weight:600;}
        .author-meta{font-size:12px;color:var(--c-text-lighter);}
        @media(max-width:768px){
            .testimonials-grid{grid-template-columns:1fr;gap:var(--sp-md);}
        }

        /* ====== News section ====== */
        .news-layout{display:grid;grid-template-columns:1.2fr 0.8fr;gap:var(--sp-2xl);}
        .news-list{display:flex;flex-direction:column;}
        .news-item{display:flex;align-items:center;gap:var(--sp-lg);padding:var(--sp-md) 0;border-bottom:1px solid var(--c-border);transition:var(--transition-base);}
        .news-item:hover{padding-left:8px;border-color:var(--c-primary);}
        .news-item .news-date{font-size:13px;color:var(--c-text-lighter);white-space:nowrap;min-width:52px;font-weight:500;}
        .news-item .news-title{font-size:15px;font-weight:500;color:var(--c-text);flex:1;line-height:1.5;}
        .news-item .news-status{font-size:12px;font-weight:600;padding:3px 10px;border-radius:50px;white-space:nowrap;}
        .status-updated{background:var(--c-primary-light);color:var(--c-primary);}
        .status-published{background:#e8f5ed;color:var(--c-success);}
        .news-sidebar{display:flex;flex-direction:column;gap:var(--sp-lg);}
        .news-sidebar .side-card{background:var(--c-white);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--c-border);box-shadow:var(--shadow-sm);}
        .news-sidebar .side-card .side-img{height:160px;overflow:hidden;}
        .news-sidebar .side-card .side-img img{width:100%;height:100%;object-fit:cover;}
        .news-sidebar .side-card .side-body{padding:var(--sp-md) var(--sp-lg);}
        .news-sidebar .side-card .side-body h3{font-size:15px;font-weight:700;margin-bottom:4px;}
        .news-sidebar .side-card .side-body p{font-size:13px;color:var(--c-text-light);line-height:1.6;}
        .side-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:var(--sp-sm);}
        .side-tags span{font-size:12px;padding:4px 12px;border-radius:50px;background:var(--c-primary-light);color:var(--c-primary);font-weight:500;}
        .news-load-more{text-align:center;margin-top:var(--sp-xl);}
        @media(max-width:768px){
            .news-layout{grid-template-columns:1fr;gap:var(--sp-xl);}
            .news-item{flex-wrap:wrap;gap:var(--sp-sm);}
        }

        /* ====== Tier comparison ====== */
        .tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-lg);align-items:stretch;}
        .tier-card{background:var(--c-white);border-radius:var(--radius-lg);padding:var(--sp-xl);border:2px solid var(--c-border);transition:var(--transition-base);display:flex;flex-direction:column;position:relative;}
        .tier-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:var(--c-primary);}
        .tier-card.featured{border-color:var(--c-primary);box-shadow:var(--shadow-md);}
        .tier-card.featured::before{content:'推荐方案';position:absolute;top:-12px;right:20px;background:var(--c-primary);color:#fff;padding:3px 14px;border-radius:50px;font-size:12px;font-weight:600;letter-spacing:0.02em;}
        .tier-card .tier-name{font-size:18px;font-weight:700;margin-bottom:var(--sp-sm);}
        .tier-card .tier-price{font-size:28px;font-weight:800;color:var(--c-primary);margin-bottom:var(--sp-sm);}
        .tier-card .tier-price span{font-size:14px;font-weight:500;color:var(--c-text-light);}
        .tier-card .tier-desc{font-size:14px;color:var(--c-text-light);margin-bottom:var(--sp-lg);line-height:1.6;}
        .tier-card .tier-features{flex:1;display:flex;flex-direction:column;gap:var(--sp-sm);margin-bottom:var(--sp-lg);}
        .tier-card .tier-features li{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--c-text-light);line-height:1.6;}
        .tier-card .tier-features li i{color:var(--c-success);font-size:13px;margin-top:4px;}
        @media(max-width:768px){
            .tier-grid{grid-template-columns:1fr;gap:var(--sp-md);}
        }

        /* ====== Security audit ====== */
        .audit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--sp-lg);}
        .audit-card{background:var(--c-white);border-radius:var(--radius-lg);padding:var(--sp-lg);border:1px solid var(--c-border);box-shadow:var(--shadow-sm);display:flex;align-items:flex-start;gap:var(--sp-md);transition:var(--transition-base);}
        .audit-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);}
        .audit-icon{width:44px;height:44px;border-radius:var(--radius-md);background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;}
        .audit-card h3{font-size:16px;font-weight:700;margin-bottom:4px;}
        .audit-card p{font-size:14px;color:var(--c-text-light);line-height:1.6;}
        @media(max-width:768px){
            .audit-grid{grid-template-columns:1fr;gap:var(--sp-md);}
        }

        /* ====== Industry scenarios ====== */
        .scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--sp-lg);}
        .scene-card{background:var(--c-white);border-radius:var(--radius-lg);padding:var(--sp-lg);border:1px solid var(--c-border);box-shadow:var(--shadow-sm);text-align:center;transition:var(--transition-base);}
        .scene-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);border-color:var(--c-accent);}
        .scene-icon{width:52px;height:52px;border-radius:50%;background:var(--c-accent-light);color:var(--c-accent);display:flex;align-items:center;justify-content:center;font-size:22px;margin:0 auto var(--sp-md);}
        .scene-card h3{font-size:16px;font-weight:700;margin-bottom:var(--sp-sm);}
        .scene-card p{font-size:13px;color:var(--c-text-light);line-height:1.65;margin-bottom:var(--sp-sm);}
        .scene-card .scene-link{font-size:13px;font-weight:600;color:var(--c-primary);}
        @media(max-width:1024px){
            .scene-grid{grid-template-columns:repeat(2,1fr);}
        }
        @media(max-width:520px){
            .scene-grid{grid-template-columns:1fr;}
        }

        /* ====== Platform guarantees ====== */
        .guarantee-bar{display:flex;flex-wrap:wrap;gap:var(--sp-md);justify-content:space-between;}
        .guarantee-item{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:var(--c-text);padding:var(--sp-md) var(--sp-lg);background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:50px;color:var(--c-dark-text);}
        .guarantee-item i{color:var(--c-accent);font-size:16px;}
        @media(max-width:768px){
            .guarantee-bar{flex-direction:column;align-items:stretch;}
            .guarantee-item{justify-content:center;}
        }

        /* ====== FAQ ====== */
        .faq-list{display:flex;flex-direction:column;gap:var(--sp-sm);max-width:800px;margin:0 auto;}
        .faq-item{background:var(--c-white);border-radius:var(--radius-md);border:1px solid var(--c-border);box-shadow:var(--shadow-sm);overflow:hidden;transition:var(--transition-base);}
        .faq-item:hover{box-shadow:var(--shadow-md);}
        .faq-question{padding:var(--sp-md) var(--sp-lg);display:flex;align-items:center;justify-content:space-between;gap:var(--sp-md);cursor:pointer;font-weight:600;font-size:15px;color:var(--c-text);width:100%;text-align:left;background:none;border:0;font-family:inherit;}
        .faq-question .faq-icon{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--c-primary-light);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:13px;transition:var(--transition-base);}
        .faq-item.active .faq-icon{transform:rotate(180deg);background:var(--c-primary);color:#fff;}
        .faq-answer{max-height:0;overflow:hidden;transition:max-height 0.3s ease-in-out;padding:0 var(--sp-lg);font-size:14px;line-height:1.75;color:var(--c-text-light);}
        .faq-item.active .faq-answer{max-height:200px;padding:0 var(--sp-lg) var(--sp-md);}

        /* ====== Subscribe / CTA ====== */
        .subscribe-wrapper{max-width:700px;margin:0 auto;text-align:center;}
        .subscribe-form{display:flex;flex-wrap:wrap;gap:var(--sp-md);margin-top:var(--sp-xl);background:var(--c-white);border-radius:var(--radius-lg);padding:var(--sp-xl);box-shadow:var(--shadow-lg);}
        .form-group{flex:1;min-width:180px;text-align:left;}
        .form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--c-text);}
        .form-group input,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--c-border);border-radius:var(--radius-sm);font-size:14px;color:var(--c-text);background:var(--c-bg);transition:var(--transition-base);}
        .form-group input:focus,.form-group select:focus{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(26,93,143,0.1);}
        .form-submit{width:100%;margin-top:var(--sp-sm);}

        /* ====== Fixed bottom CTA ====== */
        .bottom-cta-bar{position:fixed;bottom:0;left:0;right:0;z-index:900;background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--c-border);box-shadow:0 -4px 20px rgba(0,0,0,0.06);padding:10px var(--sp-lg);display:flex;align-items:center;justify-content:space-between;gap:var(--sp-md);transform:translateY(100%);transition:var(--transition-base);}
        .bottom-cta-bar.show{transform:translateY(0);}
        .bottom-cta-text{font-size:14px;font-weight:600;color:var(--c-text);flex:1;}
        .bottom-cta-bar .btn{flex-shrink:0;}
        .bottom-cta-close{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--c-bg);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--c-text-light);transition:var(--transition-base);}
        .bottom-cta-close:hover{background:var(--c-border);color:var(--c-text);}
        @media(max-width:520px){
            .bottom-cta-bar{flex-wrap:wrap;padding:8px var(--sp-md);}
            .bottom-cta-text{font-size:13px;}
            .bottom-cta-bar .btn{padding:8px 16px;font-size:13px;}
        }

        /* ====== Footer ====== */
        .site-footer{background:var(--c-dark-bg);color:var(--c-dark-text);padding:var(--sp-2xl) 0 var(--sp-lg);}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:var(--sp-xl);margin-bottom:var(--sp-2xl);}
        .footer-brand .footer-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:var(--sp-sm);}
        .footer-brand .footer-logo .logo-icon{width:36px;height:36px;border-radius:var(--radius-md);background:var(--c-primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;}
        .footer-brand p{font-size:13px;color:rgba(232,238,243,0.6);line-height:1.7;max-width:320px;}
        .footer-col h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:var(--sp-md);letter-spacing:0.03em;}
        .footer-col ul{display:flex;flex-direction:column;gap:8px;}
        .footer-col ul a{font-size:13px;color:rgba(232,238,243,0.65);transition:var(--transition-base);}
        .footer-col ul a:hover{color:var(--c-accent);}
        .footer-contact{display:flex;flex-direction:column;gap:8px;font-size:13px;color:rgba(232,238,243,0.65);}
        .footer-contact li{display:flex;align-items:center;gap:8px;}
        .footer-contact i{color:var(--c-accent);width:16px;text-align:center;}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:var(--sp-lg);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--sp-sm);}
        .footer-bottom p{font-size:12px;color:rgba(232,238,243,0.45);}
        @media(max-width:768px){
            .footer-grid{grid-template-columns:1fr;gap:var(--sp-lg);}
            .footer-bottom{flex-direction:column;text-align:center;}
        }

        /* ====== Utility animations ====== */
        .reveal{opacity:0;transform:translateY(28px);transition:opacity 0.6s ease,transform 0.6s ease;}
        .reveal.visible{opacity:1;transform:translateY(0);}
        @media(prefers-reduced-motion:reduce){
            .reveal{opacity:1;transform:none;transition:none;}
            *{transition-duration:0.01ms !important;animation-duration:0.01ms !important;}
        }
        @media(max-width:520px){
            :root{--header-height:60px;}
            .nav-logo{font-size:15px;}
            .nav-logo .logo-icon{width:32px;height:32px;font-size:15px;}
            .section{padding:var(--sp-2xl) 0;}
            .section-title{font-size:20px;}
            .btn{padding:10px 18px;font-size:14px;}
            .tier-card{padding:var(--sp-lg);}
            .scene-card{padding:var(--sp-md);}
            .news-item .news-title{font-size:14px;}
        }