/* ===== RESET & BASE ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px;overflow-x:hidden}
body{font-family:'Noto Sans SC',sans-serif;color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}
ul{list-style:none}

/* ===== VARIABLES ===== */
:root{
    --bg:#060b18;
    --bg-alt:#0a1020;
    --surface:#0f1729;
    --surface-hover:#152038;
    --surface-border:#1a2844;
    --accent:#00dc82;
    --accent-dim:rgba(0,220,130,0.12);
    --accent-glow:rgba(0,220,130,0.25);
    --orange:#ff7a3d;
    --orange-dim:rgba(255,122,61,0.12);
    --blue:#3b82f6;
    --blue-dim:rgba(59,130,246,0.12);
    --purple:#a855f7;
    --purple-dim:rgba(168,85,247,0.12);
    --yellow:#fbbf24;
    --text:#e4eaf5;
    --text-sec:#8494b2;
    --text-muted:#4a5a78;
    --border:#182236;
    --radius:20px;
    --radius-sm:12px;
    --radius-xs:8px;
    --max-w:1200px;
    --nav-h:72px;
}

/* ===== TYPOGRAPHY ===== */
.mono{font-family:'DM Mono',monospace}
h1{font-size:clamp(2.4rem,6vw,4.2rem);font-weight:900;line-height:1.15;letter-spacing:-0.02em}
h2{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:700;line-height:1.2}
h3{font-size:clamp(1.1rem,2vw,1.4rem);font-weight:700;line-height:1.35}
p{color:var(--text-sec)}

/* ===== LAYOUT ===== */
.section-label{display:inline-flex;align-items:center;gap:8px;font-family:'DM Mono',monospace;font-size:0.8rem;font-weight:500;color:var(--accent);text-transform:uppercase;letter-spacing:0.12em;margin-bottom:16px}
.section-label::before{content:'';display:block;width:24px;height:2px;background:var(--accent)}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px}
section{padding:100px 0;position:relative}
body::after{content:'';position:fixed;inset:0;z-index:9999;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");opacity:0.03}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:60px;font-weight:500;font-size:0.95rem;transition:all 0.3s cubic-bezier(0.4,0,0.2,1);white-space:nowrap}
.btn-primary{background:var(--accent);color:#060b18;box-shadow:0 0 30px rgba(0,220,130,0.2)}
.btn-primary:hover{box-shadow:0 0 50px rgba(0,220,130,0.35);transform:translateY(-2px)}
.btn-outline{border:1.5px solid var(--surface-border);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}
.btn-sm{padding:10px 24px;font-size:0.85rem}

/* ===== NAV ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);background:rgba(6,11,24,0.7);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:background 0.3s}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:flex-start}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:1.3rem}
.nav-logo-icon{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#00b36b);display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:900;color:#060b18}
.nav-trust{display:inline-flex;align-items:center;gap:0;font-size:0.7rem;color:var(--accent);font-weight:500;padding:4px 12px;border-radius:60px;background:var(--accent-dim);border:1px solid rgba(0,220,130,0.2);margin-left:23px;white-space:nowrap;overflow:hidden}
.nav-trust:hover{background:rgba(0,220,130,0.18);border-color:rgba(0,220,130,0.4)}
.tw-cursor{display:inline-block;width:2px;height:0.85em;background:var(--accent);margin-left:1px;border-radius:1px;animation:twBlink 0.7s steps(2) infinite}
@keyframes twBlink{0%,49%{opacity:1}50%,100%{opacity:0}}
.nav-links{display:flex;align-items:center;gap:32px;margin-left:auto}
.nav-links a{font-size:0.9rem;color:var(--text-sec);transition:color 0.2s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--accent);border-radius:1px;transform:scaleX(0);transition:transform 0.25s}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--accent)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:32px}
.hamburger{display:none;flex-direction:column;gap:5px;padding:8px;z-index:1001}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);transition:all 0.3s;border-radius:1px}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.mobile-menu{display:none;position:fixed;inset:0;z-index:999;background:rgba(6,11,24,0.97);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);flex-direction:column;align-items:center;justify-content:center;gap:32px;opacity:0;pointer-events:none;transition:opacity 0.35s}
.mobile-menu.open{opacity:1;pointer-events:all}
.mobile-menu a{font-size:1.6rem;font-weight:700;color:var(--text);transition:color 0.2s}
.mobile-menu a:hover{color:var(--accent)}

/* ===== PARTNERS ===== */
.partners{padding:40px 0;border-top:1px solid var(--border);background:var(--bg)}
.partners-header{text-align:center;margin-bottom:30px}
.partners-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:48px}
.partner-logo{padding:10px 20px;border-radius:var(--radius-xs);background:#111c30;border:1px solid var(--surface-border);font-size:0.78rem;font-weight:600;color:#fff;display:flex;flex-direction:row;align-items:center;gap:8px;transition:all 0.3s}
.partner-logo:hover{border-color:var(--accent);background:var(--surface-hover);color:var(--text-sec)}
.partner-logo img{max-height:30px;max-width:80px;object-fit:contain;width:auto}

/* ===== FOOTER ===== */
.footer{padding:64px 0 32px;border-top:1px solid var(--border);background:var(--bg-alt)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand p{font-size:0.88rem;margin-top:12px;max-width:300px;text-indent:2em}
.footer-brand p+p{margin-top:4px}
.footer-col h4{font-size:0.85rem;font-weight:700;color:var(--text);margin-bottom:20px;text-transform:uppercase;letter-spacing:0.05em}
.footer-col a{display:block;font-size:0.88rem;color:var(--text-muted);padding:6px 0;transition:color 0.2s;position:relative}
.footer-col a:hover{color:var(--accent)}
.nav-badge{font-size:0.62rem;font-weight:700;white-space:nowrap}
.nav-badge.hot{font-size:0.72rem}
.nav-badge.new{background:var(--accent);color:#000;padding:1px 4px;border-radius:6px;font-size:0.46rem}
.nav-links a .nav-badge{position:absolute;top:-8px;right:-12px}
.nav-links a .nav-badge.new{right:-23px;top:-6px}
.footer-col a .nav-badge,.mobile-menu a .nav-badge{vertical-align:baseline;margin-left:3px;line-height:1}
.mobile-menu a{position:relative}

/* ===== NAV DROPDOWN ===== */
.nav-dropdown{position:relative;display:inline-flex;align-items:center}
.nav-dropdown-trigger{font-size:0.9rem;color:var(--text-sec);transition:color 0.2s;position:relative;display:inline-flex;align-items:center;gap:4px}
.nav-dropdown-trigger:hover{color:var(--text)}
.nav-dropdown-trigger::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--accent);border-radius:1px;transform:scaleX(0);transition:transform 0.25s}
.nav-dropdown-trigger:hover::after{transform:scaleX(1)}
.nav-dropdown-trigger.active{color:var(--accent)}
.nav-dropdown-trigger.active::after{transform:scaleX(1)}
.dropdown-arrow{font-size:0.6rem;color:var(--accent);transition:transform 0.3s;display:inline-block}
.nav-dropdown:hover .dropdown-arrow{transform:rotate(180deg)}
.nav-dropdown::before{content:'';position:absolute;top:100%;left:50%;width:16px;height:22px;margin-left:-8px;pointer-events:auto}
.nav-dropdown-menu{position:absolute;top:calc(100% + 8px);left:50%;margin-left:-58px;width:116px;background:var(--surface);border:1px solid var(--surface-border);border-radius:var(--radius-sm);padding:8px 0;opacity:0;visibility:hidden;pointer-events:none;transition:opacity 0.2s,visibility 0.2s;box-shadow:0 12px 40px rgba(0,0,0,0.4);z-index:1002}
.nav-dropdown:hover .nav-dropdown-menu{opacity:1;visibility:visible;pointer-events:auto}
.nav-dropdown-menu::before{content:'';position:absolute;top:-7px;left:50%;margin-left:-6px;width:12px;height:12px;background:var(--surface);border-left:1px solid var(--surface-border);border-top:1px solid var(--surface-border);transform:rotate(45deg)}
.nav-dropdown-menu a{display:block;padding:8px 0.3cm;text-align:center;font-size:0.88rem;color:var(--text-sec);transition:all 0.2s;white-space:nowrap}
.nav-dropdown-menu a:hover{color:var(--accent);background:var(--accent-dim)}
.nav-dropdown-menu a.active{color:var(--accent);font-weight:600}

.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:32px;border-top:1px solid var(--border);font-size:0.82rem;color:var(--text-muted);flex-wrap:nowrap;gap:16px}
.footer-bottom span{white-space:nowrap;flex-shrink:0}
.beian-link{color:inherit;text-decoration:none;transition:color 0.3s;white-space:nowrap;display:inline-flex;align-items:center}
.beian-link:hover{color:var(--accent)}
.footer-bottom a{color:var(--text-muted);transition:color 0.2s;white-space:nowrap}
.footer-bottom a:hover{color:var(--accent)}

/* ===== CTA BOX (shared by index & merchant) ===== */
#cta{background:var(--bg);text-align:center;padding:120px 0}
.cta-box{padding:80px 40px;border-radius:var(--radius);background:linear-gradient(135deg,rgba(0,220,130,0.08),rgba(59,130,246,0.08));border:1px solid rgba(0,220,130,0.15);position:relative;overflow:hidden}
.cta-box::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 50% 0%,rgba(0,220,130,0.1) 0%,transparent 60%)}
.cta-box h2{position:relative;z-index:1;margin-bottom:16px}
.cta-box p{position:relative;z-index:1;font-size:1.05rem;margin-bottom:40px}
.cta-actions{position:relative;z-index:1;display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== VERSIONS (shared by index & scenarios) ===== */
.ver-grid{display:grid;grid-template-columns:repeat(3,minmax(0,300px));gap:60px;justify-content:center}
.ver-card{border-radius:var(--radius);background:var(--surface);border:2px solid var(--border);overflow:hidden;transition:all 0.35s;position:relative;display:flex;flex-direction:column}
.ver-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 20px 60px rgba(0,0,0,0.3)}
.ver-card.rec{border-color:var(--accent);box-shadow:0 0 40px var(--accent-glow)}
.ver-card .badge{position:absolute;top:0;right:0;background:var(--accent);color:#060b18;padding:6px 16px;font-size:0.72rem;font-weight:700;border-radius:0 var(--radius) 0 var(--radius-xs)}
.ver-header{padding:28px 28px 18px;border-bottom:1px solid var(--border)}
.ver-header h3{margin-bottom:6px}
.ver-header p{font-size:0.85rem}
.ver-screenshot{height:180px;background:linear-gradient(135deg,var(--surface),#1a2844);margin:16px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:0.8rem}
.ver-screenshot.ver-shot-img{height:auto;width:calc(100% - 88px);margin:18px auto 4px;padding:22px 16px 16px;background:linear-gradient(160deg,#15233f,#0e1a30);border:1px solid var(--border);border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;gap:14px}
.ver-screenshot.ver-shot-img img{display:block;width:130px;height:130px;box-sizing:border-box;background:#fff;padding:9px;border-radius:16px;box-shadow:0 8px 22px rgba(0,0,0,0.32)}
.ver-screenshot.ver-shot-img::after{content:"微信扫一扫 · 体验该版本";font-size:0.78rem;color:var(--text-muted);letter-spacing:.5px}
.ver-features{flex:1;display:flex;flex-direction:column;justify-content:flex-start;padding:4px 28px 10px}
.ver-features li{padding:4px 0;font-size:0.82rem;color:var(--text-sec);display:flex;align-items:center;gap:8px}
.ver-features li::before{content:'✓';color:var(--accent);font-weight:700;font-size:0.7rem}
.ver-features li.warn{color:var(--orange)}
.ver-features li.warn::before{content:'✕';color:var(--orange)}

/* ===== INDUSTRIES GRID (shared by index & scenarios) ===== */
.ind-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ind-card{padding:24px 16px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border);text-align:center;transition:all 0.35s}
.ind-card:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,0.2)}
.ind-icon{font-size:2rem;margin-bottom:10px}
.ind-card h4{font-size:0.88rem;font-weight:700;margin-bottom:4px}
.ind-card p{font-size:0.75rem}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.reveal{opacity:0;transform:translateY(30px);transition:all 0.7s cubic-bezier(0.4,0,0.2,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:0.1s}
.reveal-delay-2{transition-delay:0.2s}
.reveal-delay-3{transition-delay:0.3s}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--surface-border);border-radius:3px}

/* ===== RESPONSIVE (common) ===== */
@media(max-width:1024px){
    .ver-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}

/* ============================================================
   MOBILE 768px — 平板与小屏手机（仅修改手机端样式）
   ============================================================ */
@media(max-width:768px){
    :root{--nav-h:60px}
    section{padding:60px 0}
    .container{padding:0 16px}
    .nav-inner{padding:0 16px}
    .nav-links,.nav-cta,.nav-trust{display:none}
    .hamburger{display:flex}
    .mobile-menu{display:flex}
    .nav-inner{justify-content:space-between}
    
    /* 通用标题字号保险缩放（避免 clamp 上限过大） */
    h1{font-size:clamp(1.6rem,7vw,2.2rem) !important;line-height:1.25}
    h2,.section-title{font-size:clamp(1.3rem,5vw,1.7rem) !important}
    h3{font-size:clamp(1.05rem,3vw,1.2rem) !important}
    p{font-size:0.92rem}
    
    /* ===== HERO 区域 — 隐藏装饰卡片避免内容挤掉 ===== */
    .hero{padding:88px 0 48px !important;min-height:0 !important}
    .hero h1{font-size:clamp(1.6rem,7vw,2.1rem) !important}
    .hero-content{gap:24px !important}
    .hero-left{text-align:center;width:100%}
    .hero-left > p{font-size:0.92rem !important;line-height:1.7}
    .hero-actions{justify-content:center;flex-wrap:wrap;gap:10px}
    .hero-stats{gap:20px;justify-content:center}
    .hero-stat-num{font-size:1.5rem !important}
    .hero-orb,.hero-grid{display:none !important}
    
    /* 隐藏首页右侧数据看板（装饰性、宽屏才有意义） */
    .hero-visual{display:none !important}
    /* 但保留手机截图（merchant页有产品截图，但 .hero-visual 内部都隐藏，会丢截图） */
    /* 补偿：merchant页的截图卡片换到 hero-left 下方——通过页面 css 控制 */
    
    /* ===== Page Banner ===== */
    .page-banner{padding:60px 0 32px !important;min-height:0 !important;background-attachment:scroll !important}
    .page-banner h1{font-size:clamp(1.5rem,7vw,2rem) !important;margin-bottom:12px}
    .page-banner p{font-size:0.92rem}
    .banner-breadcrumb{font-size:0.82rem}
    
    /* ===== Sections 节奏 ===== */
    .features-header{margin-bottom:36px}
    .features-header h2{font-size:clamp(1.3rem,5vw,1.7rem)}
    .section-label{font-size:0.72rem;margin-bottom:12px}
    
    /* ===== 卡片间距 ===== */
    .feature-card,.adv-card,.ind-card,.ps-card,.product-card,.ver-card{padding:20px 16px}
    .feature-card p,.product-card .subtitle{font-size:0.85rem}
    
    /* ===== Ver grid 单列（已加）保留 ===== */
    .ver-grid{grid-template-columns:1fr;gap:32px}
    .ind-grid{grid-template-columns:1fr 1fr;gap:10px}
    .ind-card{padding:18px 10px}
    .ind-icon{font-size:1.6rem}
    .ind-card h4{font-size:0.82rem}
    
    /* ===== 优势卡 4列变 2列 ===== */
    .adv-grid{grid-template-columns:1fr 1fr;gap:12px}
    .adv-card{padding:18px 14px}
    .adv-num{font-size:1.8rem}
    .adv-card h4{font-size:0.88rem}
    .adv-card p{font-size:0.78rem}
    
    /* ===== Partners 单行滚动友好 ===== */
    .partners-grid{gap:16px}
    .partner-logo{padding:8px 12px;font-size:0.72rem}
    .partner-logo img{max-height:22px;max-width:50px}
    
    /* ===== Footer 单列 ===== */
    .footer{padding:48px 0 24px}
    .footer-grid{grid-template-columns:1fr;gap:28px;margin-bottom:28px}
    .footer-brand{grid-column:1 / -1}
    .footer-brand p{max-width:100%;text-indent:2em;font-size:0.82rem}
    .footer-col h4{font-size:0.82rem;margin-bottom:14px}
    .footer-col a{font-size:0.84rem;padding:5px 0}
    .footer-bottom{flex-direction:column;text-align:center;gap:8px;padding-top:20px}
    .footer-bottom span{white-space:normal;flex-shrink:1;max-width:100%;font-size:0.76rem;line-height:1.7}
    .footer-bottom a{white-space:normal}
    
    /* ===== 按钮收紧 ===== */
    .btn{padding:11px 22px;font-size:0.86rem}
    .btn-sm{padding:9px 18px;font-size:0.8rem}
    
    /* ===== CTA Box 收紧 ===== */
    .cta-box{padding:40px 20px}
    .cta-box p{font-size:0.95rem;margin-bottom:24px}
    .cta-actions{gap:10px;flex-direction:column;align-items:stretch}
    .cta-actions .btn{width:100%}
    .cta-box h2{font-size:1.4rem}
    
    /* ===== Articles 列表卡片 ===== */
    .articles-grid{grid-template-columns:1fr;gap:14px}
    .article-card{padding:18px}
    .article-title{font-size:1.05rem;line-height:1.45}
    .article-excerpt{font-size:0.86rem}
    
    /* ===== 浮动客服按钮 — 缩小、移到底部右下、不挡内容 ===== */
    .float-nav{right:10px;left:10px;top:auto;bottom:14px;transform:none;flex-direction:row;justify-content:flex-end;gap:6px}
    .fn-item{width:40px;height:40px;font-size:1rem;background:rgba(15,23,41,0.92);backdrop-filter:blur(10px)}
    .fn-item .fn-icon{width:24px;height:24px}
    .fn-item .fn-tip{display:none !important}
    
    /* ===== 移动端正文留出底部安全距离（避开浮动按钮） ===== */
    body{padding-bottom:64px}
    
    /* ===== 关闭 hero 数据卡片动画避免移动端卡顿 ===== */
    .hv-card{transition:none !important;animation:none !important}
    .hv-main,.hv-instore,.hv-merchants,.hv-riders,.hv-stores,.hv-trends{position:relative !important;left:auto !important;top:auto !important;transform:none !important}
    
    /* ===== partner logo 移动端居中 ===== */
    .partners-grid{padding:0 10px}
    
    /* ===== Pages 表格/长内容滚动 ===== */
    .fn-popup-box{padding:28px 24px;max-width:88vw}
    .fn-popup-box .fn-qr{width:160px;height:160px}
}

/* ============================================================
   MOBILE 480px — 小屏手机（iPhone SE 等）
   ============================================================ */
@media(max-width:480px){
    .container{padding:0 14px}
    .nav-inner{padding:0 14px}
    .nav-logo{font-size:1.1rem}
    .nav-logo-icon{width:32px;height:32px;font-size:0.9rem}
    
    h1{font-size:clamp(1.5rem,8vw,1.85rem) !important}
    h2,.section-title{font-size:1.25rem !important}
    h3{font-size:1rem !important}
    p{font-size:0.88rem}
    
    .hero{padding:80px 0 40px !important}
    .hero h1{font-size:1.55rem !important}
    .hero-stat-num{font-size:1.3rem !important}
    .hero-stats{gap:14px}
    .hero-stat-label{font-size:0.7rem}
    
    .page-banner{padding:48px 0 24px !important}
    .page-banner h1{font-size:1.45rem !important}
    .page-banner p{font-size:0.86rem}
    
    section{padding:48px 0}
    .container{padding:0 14px}
    
    .feature-card,.adv-card,.ind-card,.ps-card,.product-card,.ver-card{padding:16px 14px}
    .adv-grid{grid-template-columns:1fr;gap:10px}
    .adv-num{font-size:1.5rem}
    .ind-grid{grid-template-columns:1fr 1fr;gap:8px}
    
    .btn{padding:10px 20px;font-size:0.82rem}
    .btn-sm{padding:8px 16px;font-size:0.76rem}
    
    .float-nav{right:8px;bottom:10px;gap:5px}
    .fn-item{width:36px;height:36px;font-size:0.9rem}
    .fn-item .fn-icon{width:20px;height:20px}
    
    .article-card{padding:16px}
    .article-title{font-size:1rem}
    .article-excerpt{font-size:0.82rem}
    
    .partner-logo{padding:6px 10px;font-size:0.68rem;gap:6px}
    .partner-logo img{max-height:18px;max-width:42px}
    
    .footer{padding:36px 0 20px}
    .footer-bottom span{font-size:0.72rem}
}

/* ===== FLOATING SIDEBAR ===== */
.float-nav{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:900;display:flex;flex-direction:column;gap:12px}
.fn-item{width:52px;height:52px;border-radius:50%;background:var(--surface);border:1px solid var(--surface-border);display:flex;align-items:center;justify-content:center;font-size:1.3rem;cursor:pointer;transition:all 0.3s;position:relative;color:var(--text)}
.fn-item:hover{background:var(--accent);border-color:var(--accent);color:#000;transform:scale(1.1)}
.fn-icon{width:20px;height:20px;object-fit:contain}
.fn-icon[src*="weixin"]{width:24px;height:24px}
.fn-tip{position:absolute;right:62px;top:50%;transform:translateY(-50%);white-space:nowrap;background:var(--surface);border:1px solid var(--surface-border);padding:6px 14px;border-radius:8px;font-size:0.78rem;color:var(--text);opacity:0;pointer-events:none;transition:all 0.3s}
.fn-item:hover .fn-tip{opacity:1;right:66px}
.fn-popup{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:1000;align-items:center;justify-content:center}
.fn-popup.open{display:flex}
.fn-popup-box{background:var(--surface);border:1px solid var(--surface-border);border-radius:16px;padding:36px 40px;text-align:center;max-width:340px;position:relative;animation:fadeUp 0.3s ease}
.fn-popup-box h4{font-size:1.1rem;margin-bottom:16px;color:var(--text)}
.fn-popup-box .fn-phone{font-size:1.6rem;font-weight:700;color:var(--accent);margin-bottom:8px}
.fn-popup-box .fn-sub{font-size:0.82rem;color:var(--text-muted);margin-bottom:20px}
.fn-popup-box .fn-qr{width:200px;height:200px;margin:0 auto 16px;background:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.fn-popup-box .fn-qr img{width:100%;height:100%;object-fit:contain}
.fn-popup-box .fn-qr-placeholder{font-size:0.8rem;color:#999;text-align:center;padding:20px}
.fn-close{position:absolute;top:12px;right:16px;font-size:1.4rem;color:var(--text-muted);cursor:pointer;transition:color 0.2s;line-height:1}
.fn-close:hover{color:var(--accent)}

/* footer brand: text select-highlight (green text, no background) */
.footer-brand .sel-text .ch{transition:color .28s ease}
.footer-brand .sel-text .ch.on{color:#00dc82}
.sel-caret{display:inline-block;width:2px;height:1.15em;background:#00dc82;vertical-align:-3px;margin-left:1px;animation:selblink 1s step-end infinite}
@keyframes selblink{50%{opacity:0}}
@media(prefers-reduced-motion:reduce){.footer-brand .sel-text .ch{transition:none}.sel-caret{display:none}}

/* ===== FAQ ===== */
.faq-section{padding:100px 0 80px}
.faq-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:12px 14px;align-items:start}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:var(--accent)}
.faq-item summary{list-style:none;cursor:pointer;padding:12px 18px;font-weight:600;font-size:.92rem;display:flex;justify-content:space-between;align-items:center;color:var(--text)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:1.2rem;color:var(--accent);transition:transform .3s;flex-shrink:0;margin-left:12px}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-a{padding:0 18px 16px;font-size:.88rem;color:var(--text-sec);line-height:1.8}
@media(max-width:1024px){.faq-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.faq-grid{grid-template-columns:1fr}}