/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',sans-serif;font-size:16px;line-height:1.6;color:#333;background:#fff}
a{text-decoration:none;color:inherit;transition:color .3s}
img{max-width:100%;height:auto}
ul{list-style:none}

/* ===== Container ===== */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Navigation ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.08);transition:background .3s}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px;max-width:1200px;margin:0 auto;padding:0 20px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:#1a73e8}
.nav-logo:hover{color:#1557b0}
.logo-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;border-radius:10px;font-size:18px;font-weight:800}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:15px;color:#555;font-weight:500;transition:color .3s;padding:5px 0}
.nav-links a:hover,.nav-links a.active{color:#1a73e8}
.nav-cta{display:inline-flex;align-items:center;padding:9px 22px;background:linear-gradient(135deg,#ff6b35,#ff8f00);color:#fff!important;border-radius:25px;font-weight:600;font-size:14px;transition:transform .3s,box-shadow .3s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,107,53,.35);color:#fff!important}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:5px}
.nav-toggle span{display:block;width:24px;height:2px;background:#333;border-radius:2px;transition:all .3s}

/* ===== Hero ===== */
.hero{padding:140px 20px 80px;text-align:center;background:linear-gradient(160deg,#e8f4fd 0%,#f0f4ff 50%,#fff 100%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(26,115,232,.08) 0%,transparent 70%);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,107,53,.06) 0%,transparent 70%);border-radius:50%}
.hero-content{position:relative;z-index:1;max-width:800px;margin:0 auto}
.hero h1{font-size:48px;font-weight:800;color:#1a1a2e;margin-bottom:20px;line-height:1.2}
.hero h1 span{color:#1a73e8}
.hero-sub{font-size:18px;color:#666;margin-bottom:36px;line-height:1.8}
.hero-cta{display:inline-flex;align-items:center;padding:16px 48px;background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;border-radius:50px;font-size:18px;font-weight:700;transition:transform .3s,box-shadow .3s;box-shadow:0 8px 30px rgba(26,115,232,.3)}
.hero-cta:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(26,115,232,.4);color:#fff}
.hero-trust{display:flex;justify-content:center;gap:30px;margin-top:36px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:#888}
.trust-icon{font-size:18px}

/* ===== Section Common ===== */
.section{padding:80px 20px}
.section-alt{background:#f8fafc}
.section-title{text-align:center;font-size:32px;font-weight:700;color:#1a1a2e;margin-bottom:12px}
.section-desc{text-align:center;font-size:16px;color:#666;margin-bottom:50px;max-width:600px;margin-left:auto;margin-right:auto}

/* ===== Features Grid ===== */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:1200px;margin:0 auto}
.feature-card{background:#fff;border-radius:16px;padding:36px 24px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s}
.feature-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px rgba(0,0,0,.1)}
.feature-icon{width:64px;height:64px;margin:0 auto 20px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e8f4fd,#d0e8ff);border-radius:16px;font-size:28px}
.feature-card h3{font-size:18px;font-weight:600;color:#1a1a2e;margin-bottom:10px}
.feature-card p{font-size:14px;color:#666;line-height:1.6}

/* ===== Scenes Grid ===== */
.scenes-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:1200px;margin:0 auto}
.scene-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s}
.scene-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px rgba(0,0,0,.1)}
.scene-img{height:160px;display:flex;align-items:center;justify-content:center;font-size:48px}
.scene-img-1{background:linear-gradient(135deg,#e3f2fd,#bbdefb)}
.scene-img-2{background:linear-gradient(135deg,#e8f5e9,#c8e6c9)}
.scene-img-3{background:linear-gradient(135deg,#fff3e0,#ffe0b2)}
.scene-img-4{background:linear-gradient(135deg,#f3e5f5,#e1bee7)}
.scene-body{padding:24px}
.scene-card h3{font-size:18px;font-weight:600;color:#1a1a2e;margin-bottom:8px}
.scene-card p{font-size:14px;color:#666;line-height:1.6}

/* ===== Steps ===== */
.steps{display:flex;justify-content:center;gap:60px;flex-wrap:wrap;max-width:900px;margin:0 auto}
.step{text-align:center;flex:1;min-width:200px;position:relative}
.step-num{width:56px;height:56px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;border-radius:50%;font-size:22px;font-weight:700}
.step h3{font-size:18px;font-weight:600;color:#1a1a2e;margin-bottom:8px}
.step p{font-size:14px;color:#666}
.step-arrow{position:absolute;right:-40px;top:28px;font-size:24px;color:#ccc}
.steps-link{text-align:center;margin-top:40px}
.steps-link a{color:#1a73e8;font-weight:600;font-size:15px;transition:color .3s}
.steps-link a:hover{color:#ff6b35}

/* ===== Download Section ===== */
.download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:1000px;margin:0 auto}
.download-card{background:#fff;border-radius:16px;padding:32px 20px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s}
.download-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px rgba(0,0,0,.1)}
.download-icon{font-size:40px;margin-bottom:12px}
.download-card h3{font-size:18px;font-weight:600;color:#1a1a2e;margin-bottom:6px}
.download-ver{font-size:12px;color:#999;margin-bottom:16px}
.download-btn{display:inline-block;padding:10px 28px;background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;border-radius:25px;font-size:14px;font-weight:600;transition:transform .3s,box-shadow .3s}
.download-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(26,115,232,.3);color:#fff}
.download-note{text-align:center;margin-top:30px;font-size:13px;color:#999}

/* ===== Trust ===== */
.trust-stats{display:flex;justify-content:center;gap:60px;flex-wrap:wrap;margin-bottom:50px}
.stat-item{text-align:center}
.stat-num{font-size:42px;font-weight:800;color:#1a73e8;line-height:1}
.stat-label{font-size:14px;color:#666;margin-top:8px}
.trust-badges{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.badge{display:flex;align-items:center;gap:8px;font-size:14px;color:#666}
.badge-icon{font-size:24px;color:#1a73e8}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;padding:28px 32px;margin-bottom:16px;box-shadow:0 2px 12px rgba(0,0,0,.05)}
.faq-item h3{font-size:17px;font-weight:600;color:#1a1a2e;margin-bottom:14px}
.faq-item ol{padding-left:20px;list-style:decimal}
.faq-item ol li{font-size:14px;color:#555;line-height:1.8;margin-bottom:4px}

/* ===== CTA Banner ===== */
.cta-banner{padding:60px 20px;text-align:center;background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff}
.cta-banner h2{font-size:28px;font-weight:700;margin-bottom:12px}
.cta-banner p{font-size:16px;opacity:.9;margin-bottom:28px}
.cta-banner a{display:inline-block;padding:14px 40px;background:#ff6b35;color:#fff;border-radius:50px;font-size:16px;font-weight:700;transition:transform .3s,box-shadow .3s}
.cta-banner a:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,107,53,.4)}

/* ===== Page Header ===== */
.page-header{padding:120px 20px 50px;text-align:center;background:linear-gradient(160deg,#e8f4fd 0%,#f0f4ff 100%)}
.page-header h1{font-size:36px;font-weight:700;color:#1a1a2e;margin-bottom:12px}
.page-header p{font-size:16px;color:#666;max-width:600px;margin:0 auto}

/* ===== Content Blocks ===== */
.content-section{padding:60px 20px}
.content-block{max-width:800px;margin:0 auto}
.content-block h2{font-size:24px;font-weight:600;color:#1a1a2e;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid #e8f4fd}
.content-block h3{font-size:18px;font-weight:600;color:#1a1a2e;margin:20px 0 10px}
.content-block p{font-size:15px;color:#555;line-height:1.8;margin-bottom:12px}
.content-block ol,.content-block ul{padding-left:20px;margin-bottom:16px}
.content-block ol{list-style:decimal}
.content-block ul{list-style:disc}
.content-block li{font-size:15px;color:#555;line-height:1.8;margin-bottom:6px}

/* ===== Feature Detail ===== */
.feature-detail{max-width:900px;margin:0 auto}
.feature-detail-item{display:flex;gap:30px;align-items:flex-start;margin-bottom:40px;padding:30px;background:#fff;border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,.05)}
.feature-detail-icon{width:72px;height:72px;min-width:72px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e8f4fd,#d0e8ff);border-radius:18px;font-size:32px}
.feature-detail-content h3{font-size:20px;font-weight:600;color:#1a1a2e;margin-bottom:8px}
.feature-detail-content p{font-size:15px;color:#555;line-height:1.8}

/* ===== Guide Steps ===== */
.guide-steps{max-width:800px;margin:0 auto}
.guide-step{display:flex;gap:24px;align-items:flex-start;margin-bottom:36px;padding:28px;background:#fff;border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,.05)}
.guide-step-num{width:48px;height:48px;min-width:48px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;border-radius:50%;font-size:20px;font-weight:700}
.guide-step-content h3{font-size:18px;font-weight:600;color:#1a1a2e;margin-bottom:8px}
.guide-step-content p{font-size:15px;color:#555;line-height:1.8}

/* ===== Footer ===== */
.footer{background:#1a1a2e;color:#aab;padding:60px 20px 30px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px;max-width:1200px;margin:0 auto 40px}
.footer-col h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:#889;margin-bottom:10px;transition:color .3s}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:14px;color:#889;line-height:1.8}
.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid #2a2a3e;max-width:1200px;margin:0 auto}
.footer-bottom p{font-size:13px;color:#667}

/* ===== Responsive ===== */
@media(max-width:1024px){
    .features-grid,.scenes-grid{grid-template-columns:repeat(2,1fr)}
    .download-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:repeat(2,1fr)}
    .trust-stats{gap:40px}
}
@media(max-width:768px){
    .nav-links{display:none;position:fixed;top:70px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;box-shadow:0 10px 30px rgba(0,0,0,.1);gap:0}
    .nav-links.show{display:flex}
    .nav-links a{padding:12px 0;border-bottom:1px solid #f0f0f0;width:100%;text-align:center}
    .nav-toggle{display:flex}
    .hero{padding:110px 20px 60px}
    .hero h1{font-size:32px}
    .hero-sub{font-size:16px}
    .hero-cta{padding:14px 36px;font-size:16px}
    .hero-trust{gap:16px}
    .section{padding:50px 20px}
    .section-title{font-size:26px}
    .features-grid,.scenes-grid{grid-template-columns:1fr}
    .download-grid{grid-template-columns:1fr;max-width:400px}
    .steps{flex-direction:column;gap:30px}
    .step-arrow{display:none}
    .trust-stats{gap:30px}
    .stat-num{font-size:32px}
    .footer-grid{grid-template-columns:1fr}
    .page-header{padding:100px 20px 40px}
    .page-header h1{font-size:28px}
    .feature-detail-item{flex-direction:column;gap:16px}
    .guide-step{flex-direction:column;gap:16px}
}
@media print{.navbar,.footer,.cta-banner{display:none}.section{padding:30px 0}}