/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#1E293B;background:#fff;line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit;transition:color .2s}
ul,ol{list-style:none}
img{max-width:100%;height:auto;display:block}

/* ===== Utility ===== */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-title{text-align:center;font-size:36px;font-weight:700;margin-bottom:16px;color:#1E293B}
.section-subtitle{text-align:center;font-size:18px;color:#64748B;margin-bottom:48px;max-width:700px;margin-left:auto;margin-right:auto}
.btn{display:inline-block;padding:14px 32px;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s;text-align:center}
.btn-primary{background:#2563EB;color:#fff}
.btn-primary:hover{background:#1D4ED8;transform:translateY(-2px);box-shadow:0 8px 25px rgba(37,99,235,.3)}
.btn-outline{border:2px solid #2563EB;color:#2563EB;background:transparent}
.btn-outline:hover{background:#2563EB;color:#fff}
.btn-white{background:#fff;color:#2563EB}
.btn-white:hover{background:#F0F7FF;transform:translateY(-2px)}
.btn-lg{padding:18px 40px;font-size:18px;border-radius:12px}
.text-center{text-align:center}
.mt-2{margin-top:16px}
.mt-4{margin-top:32px}

/* ===== Header ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid #E2E8F0;transition:box-shadow .3s}
.header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.08)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-size:24px;font-weight:700;color:#2563EB;display:flex;align-items:center;gap:8px}
.logo-icon{width:36px;height:36px;background:#2563EB;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}
.nav{display:flex;align-items:center;gap:32px}
.nav a{font-size:15px;color:#475569;font-weight:500;transition:color .2s}
.nav a:hover{color:#2563EB}
.nav-cta{margin-left:8px}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-toggle span{width:24px;height:2px;background:#1E293B;transition:all .3s}

/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;align-items:center;background:linear-gradient(135deg,#EFF6FF 0%,#DBEAFE 50%,#BFDBFE 100%);padding-top:70px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(37,99,235,.1) 0%,transparent 70%);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(37,99,235,.08) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:1;display:flex;align-items:center;gap:60px}
.hero-content{flex:1}
.hero-badge{display:inline-block;background:rgba(37,99,235,.1);color:#2563EB;padding:8px 20px;border-radius:50px;font-size:14px;font-weight:600;margin-bottom:24px}
.hero h1{font-size:52px;font-weight:800;line-height:1.2;margin-bottom:20px;color:#0F172A}
.hero h1 span{color:#2563EB}
.hero-desc{font-size:20px;color:#475569;margin-bottom:16px;line-height:1.7}
.hero-stats{display:flex;gap:32px;margin-bottom:32px}
.hero-stat{text-align:center}
.hero-stat-num{font-size:28px;font-weight:700;color:#2563EB}
.hero-stat-label{font-size:14px;color:#64748B}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-note{font-size:14px;color:#94A3B8;margin-top:16px}
.hero-visual{flex:1;display:flex;justify-content:center;align-items:center}
.hero-mockup{width:400px;height:400px;background:linear-gradient(135deg,#2563EB,#3B82F6);border-radius:30px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;box-shadow:0 30px 60px rgba(37,99,235,.3);position:relative}
.hero-mockup::before{content:'';position:absolute;top:20px;left:20px;right:20px;bottom:20px;border:2px solid rgba(255,255,255,.2);border-radius:20px}
.mockup-icon{font-size:80px;margin-bottom:16px}
.mockup-title{font-size:28px;font-weight:700}
.mockup-sub{font-size:16px;opacity:.8;margin-top:8px}
.mockup-status{margin-top:24px;padding:12px 28px;background:rgba(255,255,255,.2);border-radius:50px;font-size:14px}

/* ===== Features ===== */
.features{background:#fff}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature-card{padding:36px;border-radius:16px;background:#F8FAFC;border:1px solid #E2E8F0;transition:all .3s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,.08);border-color:#BFDBFE}
.feature-icon{width:56px;height:56px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:20px}
.feature-icon.blue{background:#DBEAFE}
.feature-icon.green{background:#D1FAE5}
.feature-icon.purple{background:#E0E7FF}
.feature-icon.orange{background:#FEF3C7}
.feature-icon.pink{background:#FCE7F3}
.feature-icon.cyan{background:#CFFAFE}
.feature-card h3{font-size:20px;font-weight:600;margin-bottom:12px;color:#1E293B}
.feature-card p{font-size:15px;color:#64748B;line-height:1.7}

/* ===== Download ===== */
.download{background:linear-gradient(135deg,#1E3A5F 0%,#0F172A 100%);color:#fff}
.download .section-title{color:#fff}
.download .section-subtitle{color:#94A3B8}
.download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.download-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:36px 24px;text-align:center;transition:all .3s;backdrop-filter:blur(10px)}
.download-card:hover{background:rgba(255,255,255,.15);transform:translateY(-4px);border-color:rgba(37,99,235,.5)}
.download-card-icon{font-size:48px;margin-bottom:16px}
.download-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.download-card .version{font-size:13px;color:#94A3B8;margin-bottom:20px}
.download-card .btn{width:100%}
.download-trust{text-align:center;margin-top:40px;color:#94A3B8;font-size:14px}

/* ===== Social Proof ===== */
.social-proof{background:#F8FAFC}
.proof-stats{display:flex;justify-content:center;gap:60px;margin-bottom:48px}
.proof-stat{text-align:center}
.proof-stat-num{font-size:42px;font-weight:700;color:#2563EB}
.proof-stat-label{font-size:15px;color:#64748B;margin-top:4px}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;border-radius:16px;padding:28px;border:1px solid #E2E8F0;transition:all .3s}
.review-card:hover{box-shadow:0 8px 25px rgba(0,0,0,.06)}
.review-stars{color:#F59E0B;font-size:18px;margin-bottom:12px}
.review-text{font-size:15px;color:#475569;line-height:1.7;margin-bottom:16px}
.review-author{display:flex;align-items:center;gap:12px}
.review-avatar{width:40px;height:40px;border-radius:50%;background:#DBEAFE;display:flex;align-items:center;justify-content:center;font-weight:600;color:#2563EB;font-size:16px}
.review-name{font-weight:600;font-size:14px}
.review-date{font-size:12px;color:#94A3B8}

/* ===== Pricing ===== */
.pricing{background:#fff}
.pricing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pricing-card{border-radius:16px;padding:36px 24px;border:2px solid #E2E8F0;text-align:center;transition:all .3s;position:relative;background:#fff}
.pricing-card:hover{border-color:#BFDBFE;transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,.08)}
.pricing-card.popular{border-color:#2563EB;background:linear-gradient(180deg,#EFF6FF 0%,#fff 100%)}
.pricing-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:#2563EB;color:#fff;padding:4px 20px;border-radius:50px;font-size:13px;font-weight:600}
.pricing-card h3{font-size:20px;font-weight:600;margin-bottom:8px}
.pricing-price{font-size:40px;font-weight:700;color:#2563EB;margin:16px 0}
.pricing-price span{font-size:16px;font-weight:400;color:#64748B}
.pricing-features{margin:24px 0;text-align:left}
.pricing-features li{padding:8px 0;font-size:14px;color:#475569;display:flex;align-items:center;gap:8px}
.pricing-features li::before{content:'';width:18px;height:18px;background:#D1FAE5;border-radius:50%;display:inline-flex;flex-shrink:0;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23059669' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:center}

/* ===== FAQ ===== */
.faq{background:#F8FAFC}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:12px;border:1px solid #E2E8F0;overflow:hidden;transition:all .3s}
.faq-item:hover{border-color:#BFDBFE}
.faq-question{padding:20px 24px;font-size:17px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:#1E293B}
.faq-question::after{content:'+';font-size:24px;color:#2563EB;font-weight:300;transition:transform .3s}
.faq-item.active .faq-question::after{content:'-'}
.faq-answer{padding:0 24px 20px;font-size:15px;color:#475569;line-height:1.8}
.faq-answer ol{padding-left:20px;list-style:decimal}
.faq-answer ol li{padding:4px 0}

/* ===== Footer ===== */
.footer{background:#0F172A;color:#94A3B8;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px}
.footer h4{color:#fff;font-size:16px;font-weight:600;margin-bottom:16px}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:14px;color:#94A3B8;transition:color .2s}
.footer ul li a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1E293B;padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:13px}

/* ===== Sticky CTA ===== */
.sticky-cta{position:fixed;bottom:0;left:0;right:0;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);padding:12px 0;border-top:1px solid #E2E8F0;z-index:999;transform:translateY(100%);transition:transform .3s}
.sticky-cta.show{transform:translateY(0)}
.sticky-cta .container{display:flex;align-items:center;justify-content:space-between}
.sticky-cta-text{font-weight:600;color:#1E293B}
.sticky-cta .btn{padding:10px 28px}

/* ===== Page Hero (Inner Pages) ===== */
.page-hero{padding:140px 0 60px;background:linear-gradient(135deg,#EFF6FF 0%,#DBEAFE 100%);text-align:center}
.page-hero h1{font-size:42px;font-weight:700;color:#0F172A;margin-bottom:16px}
.page-hero p{font-size:18px;color:#475569;max-width:600px;margin:0 auto}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:16px 0;font-size:14px;color:#94A3B8}
.breadcrumb a{color:#64748B}
.breadcrumb a:hover{color:#2563EB}
.breadcrumb span{margin:0 8px}

/* ===== Content Page ===== */
.content-page{padding:60px 0}
.content-block{margin-bottom:40px}
.content-block h2{font-size:24px;font-weight:600;margin-bottom:16px;color:#1E293B}
.content-block h3{font-size:20px;font-weight:600;margin-bottom:12px;color:#1E293B}
.content-block p{font-size:16px;color:#475569;line-height:1.8;margin-bottom:12px}
.content-block ul,.content-block ol{padding-left:24px;margin-bottom:12px}
.content-block ul li,.content-block ol li{padding:6px 0;font-size:15px;color:#475569;line-height:1.7}
.content-block ul{list-style:disc}
.content-block ol{list-style:decimal}

/* ===== Contact Form Style ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info-card{background:#F8FAFC;border-radius:16px;padding:32px;margin-bottom:16px}
.contact-info-card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.contact-info-card p{font-size:15px;color:#64748B}

/* ===== Responsive ===== */
@media(max-width:1024px){
    .hero .container{flex-direction:column;text-align:center}
    .hero-stats{justify-content:center}
    .hero-btns{justify-content:center}
    .hero-visual{margin-top:40px}
    .hero-mockup{width:300px;height:300px}
    .features-grid{grid-template-columns:repeat(2,1fr)}
    .download-grid{grid-template-columns:repeat(2,1fr)}
    .pricing-grid{grid-template-columns:repeat(2,1fr)}
    .reviews-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:repeat(2,1fr)}
    .contact-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
    .nav{display:none}
    .mobile-toggle{display:flex}
    .hero h1{font-size:32px}
    .hero-desc{font-size:16px}
    .hero-stats{flex-wrap:wrap;gap:20px}
    .section{padding:60px 0}
    .section-title{font-size:28px}
    .features-grid{grid-template-columns:1fr}
    .download-grid{grid-template-columns:1fr}
    .pricing-grid{grid-template-columns:1fr}
    .reviews-grid{grid-template-columns:1fr}
    .proof-stats{flex-wrap:wrap;gap:30px}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;gap:8px;text-align:center}
    .page-hero h1{font-size:30px}
}