:root{
    --tg-blue:#2AABEE;
    --tg-dark-blue:#229ED9;
    --tg-bg:#F4F4F5;
    --tg-card:#fff;
    --tg-text:#222;
    --tg-muted:#707579;
}

#hero-section{background:linear-gradient(135deg,#1c93d1 0%,#2AABEE 50%,#54c5f8 100%);overflow:hidden;position:relative;padding:0}
#hero-section .hero-bg-circle{position:absolute;border-radius:50%;background:rgba(255,255,255,.07);pointer-events:none}
#hero-section .hero-bg-circle.c1{width:600px;height:600px;top:-200px;right:-150px}
#hero-section .hero-bg-circle.c2{width:350px;height:350px;bottom:-100px;left:-80px}
#hero-section .hero-bg-circle.c3{width:180px;height:180px;top:60px;left:30%}
#hero-section .container{display:flex;align-items:center;justify-content:space-between;gap:40px;padding-top:80px;padding-bottom:80px}
#hero-section .hero-content{max-width:560px;color:#fff;z-index:1;position:relative}
#hero-section .hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:5px 14px;font-size:.8rem;font-weight:500;color:#fff;margin-bottom:24px;backdrop-filter:blur(8px)}
#hero-section .hero-badge svg{width:14px;height:14px}
#hero-section .hero-title{font-size:3.5rem;font-weight:800;line-height:1.1;margin-bottom:20px;letter-spacing:-1px}
#hero-section .hero-title span{display:block}
#hero-section .hero-desc{font-size:1.15rem;line-height:1.7;color:rgba(255,255,255,.88);margin-bottom:36px}
#hero-section .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
#hero-section .hero-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;font-weight:600;font-size:.95rem;text-decoration:none;transition:all .2s ease}
#hero-section .hero-btn.primary{background:#fff;color:var(--tg-blue)}
#hero-section .hero-btn.primary:hover{background:#f0f9ff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
#hero-section .hero-btn.secondary{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.35);backdrop-filter:blur(8px)}
#hero-section .hero-btn.secondary:hover{background:rgba(255,255,255,.28);transform:translateY(-2px)}
#hero-section .hero-stats{display:flex;gap:32px;margin-top:48px;flex-wrap:wrap}
#hero-section .hero-stat-num{font-size:2rem;font-weight:800;color:#fff;line-height:1}
#hero-section .hero-stat-label{font-size:.8rem;color:rgba(255,255,255,.7);margin-top:4px}
#hero-section .hero-image{flex-shrink:0;position:relative;z-index:1}
#hero-section .hero-phone{width:600px;filter:drop-shadow(0 24px 48px rgba(0,0,0,.3))}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@media (max-width:1030px){
    #hero-section .hero-phone{width:500px}
}
@media (max-width:880px){
    #hero-section .hero-phone{width:400px}
}
@media (max-width:768px){
    #hero-section .container{flex-direction:column;text-align:center;padding-top:60px;padding-bottom:60px}
    #hero-section .hero-title{font-size:2.4rem}
    #hero-section .hero-actions{justify-content:center}
    #hero-section .hero-stats{justify-content:center}
    #hero-section .hero-image{display:none}
}


#download-section{padding:96px 0}
#download-section .platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
#download-section .platform-card{background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:32px 24px;text-align:center;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}
#download-section .platform-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#2aabee,#6366f1);opacity:0;transition:opacity .3s}
#download-section .platform-card:hover{border-color:rgba(42,171,238,.3);box-shadow:0 10px 40px rgba(0,0,0,.08);transform:translateY(-4px)}
#download-section .platform-card:hover::before{opacity:1}
#download-section .platform-icon-wrap{width:56px;height:56px;margin:0 auto 18px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:28px}
#download-section .platform-icon-wrap.android{background:rgba(61,220,132,.1)}
#download-section .platform-icon-wrap.ios{background:rgba(99,102,241,.1)}
#download-section .platform-icon-wrap.windows{background:rgba(42,171,238,.1)}
#download-section .platform-icon-wrap.mac{background:rgba(244,114,182,.1)}
#download-section .platform-card h3{font-size:16px;font-weight:700;color:#0f172a;margin-bottom:6px}
#download-section .platform-card .platform-desc{font-size:13px;color:#94a3b8;margin-bottom:18px}
#download-section .platform-card .platform-version{font-size:12px;color:#2aabee;font-weight:600;margin-bottom:18px;display:flex;align-items:center;justify-content:center;gap:6px}
#download-section .platform-card .platform-version::before{content:'';width:5px;height:5px;background:#34d399;border-radius:50%}
#download-section .btn-card{display:block;background:#0f172a;color:#fff;padding:11px 0;border-radius:10px;text-decoration:none;font-size:13px;font-weight:600;transition:all .2s}
#download-section .btn-card:hover{background:#2aabee}
@media (max-width:1140px){
    #download-section .platform-grid{grid-template-columns:repeat(2, 1fr)}
}
@media (max-width:769px){
    #download-section{padding:64px 0}
    #download-section .platform-grid{grid-template-columns:1fr}
}


#features-section{background:var(--tg-bg)}
#features-section .features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
#features-section .feature-card{background:var(--tg-card);border-radius:16px;padding:28px 24px;transition:transform .2s ease,box-shadow .2s ease;border:1px solid rgba(0,0,0,.05)}
#features-section .feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(42,171,238,.12)}
#features-section .feature-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#e8f7fe,#c8ecfc);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
#features-section .feature-icon svg{width:26px;height:26px;color:var(--tg-blue)}
#features-section .feature-title{font-size:1.1rem;font-weight:700;margin-bottom:8px;color:var(--tg-text)}
#features-section .feature-desc{font-size:.875rem;color:var(--tg-muted);line-height:1.65}
@media (max-width:768px){
    #features-section .features-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:480px){
    #features-section .features-grid{grid-template-columns:1fr}
}


#apps-section{background:#fff}
#apps-section .apps-inner{display:flex;align-items:center;gap:0 60px}
#apps-section .apps-content{flex:1}
#apps-section .apps-label{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--tg-blue);margin-bottom:12px}
#apps-section .apps-title{font-size:2.4rem;font-weight:800;color:var(--tg-text);line-height:1.2;margin-bottom:16px}
#apps-section .apps-desc{font-size:1rem;color:var(--tg-muted);line-height:1.7;margin-bottom:32px}
#apps-section .platform-list{display:flex;flex-direction:column;gap:12px}
#apps-section .platform-item{display:flex;align-items:center;gap:14px;padding:14px 18px;border:1px solid #e9eaec;border-radius:12px;text-decoration:none;color:var(--tg-text);transition:all .2s ease}
#apps-section .platform-item:hover{border-color:var(--tg-blue);background:#f0f9ff;color:var(--tg-blue);transform:translateX(4px)}
#apps-section .platform-icon{width:36px;height:36px;flex-shrink:0}
#apps-section .platform-name{font-weight:600;font-size:.95rem}
#apps-section .platform-sub{font-size:.8rem;color:var(--tg-muted)}
#apps-section .platform-item:hover .platform-sub{color:var(--tg-blue)}
#apps-section .platform-arrow{margin-left:auto;color:var(--tg-muted)}
#apps-section .apps-visual{flex-shrink:0;width:380px;position:relative;text-align:center}
#apps-section .apps-screenshot{width:100%;max-width:380px}
@media (max-width:768px){
    #apps-section .apps-inner{flex-direction:column}
    #apps-section .apps-visual{width:100%}
    #apps-section .apps-title{font-size:1.9rem}
}


#privacy-section{background:linear-gradient(135deg,#0f2027,#203a43,#2c5364);position:relative;overflow:hidden}
#privacy-section::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
#privacy-section .section-title,#privacy-section .section-desc{color:#fff}
#privacy-section .section-desc{color:rgba(255,255,255,.7)}
#privacy-section .privacy-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
#privacy-section .privacy-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:28px;backdrop-filter:blur(10px);transition:background .2s ease}
#privacy-section .privacy-card:hover{background:rgba(255,255,255,.11)}
#privacy-section .privacy-card-icon{width:46px;height:46px;border-radius:12px;background:rgba(42,171,238,.25);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
#privacy-section .privacy-card-icon svg{width:24px;height:24px;color:#54c5f8}
#privacy-section .privacy-card-title{font-size:1.05rem;font-weight:700;color:#fff;margin-bottom:8px}
#privacy-section .privacy-card-desc{font-size:.875rem;color:rgba(255,255,255,.6);line-height:1.65}
@media (max-width:768px){
    #privacy-section .privacy-grid{grid-template-columns:1fr}
}


#channels-section{background:var(--tg-bg)}
#channels-section .channels-inner{display:flex;align-items:center;gap:60px}
#channels-section .channels-visual{flex-shrink:0;width:340px}
#channels-section .channels-mock{background:#fff;border-radius:20px;padding:20px;box-shadow:0 12px 40px rgba(0,0,0,.1)}
#channels-section .channels-mock-header{display:flex;align-items:center;gap:10px;padding-bottom:16px;border-bottom:1px solid #f0f0f0;margin-bottom:12px}
#channels-section .channels-mock-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--tg-blue),#54c5f8);flex-shrink:0}
#channels-section .channels-mock-name{font-weight:700;font-size:.95rem;color:var(--tg-text)}
#channels-section .channels-mock-sub{font-size:.78rem;color:var(--tg-muted)}
#channels-section .channels-msg{background:#f0f9ff;border-radius:12px 12px 12px 4px;padding:10px 14px;margin-bottom:8px;font-size:.875rem;color:var(--tg-text);line-height:1.5;max-width:85%}
#channels-section .channels-msg .msg-views{font-size:.75rem;color:var(--tg-muted);margin-top:4px;display:flex;align-items:center;gap:4px}
#channels-section .channels-content{flex:1}
#channels-section .channels-label{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--tg-blue);margin-bottom:12px}
#channels-section .channels-title{font-size:2.4rem;font-weight:800;color:var(--tg-text);line-height:1.2;margin-bottom:16px}
#channels-section .channels-desc{font-size:1rem;color:var(--tg-muted);line-height:1.7;margin-bottom:28px}
#channels-section .channels-points{display:flex;flex-direction:column;gap:12px}
#channels-section .channels-point{display:flex;align-items:flex-start;gap:12px;font-size:.9rem;color:var(--tg-muted);line-height:1.6}
#channels-section .channels-point-dot{width:8px;height:8px;border-radius:50%;background:var(--tg-blue);flex-shrink:0;margin-top:7px}
@media (max-width:768px){
    #channels-section .channels-inner{flex-direction:column-reverse}
    #channels-section .channels-visual{width:100%}
    #channels-section .channels-title{font-size:1.9rem}
}


#cta-section{background:var(--tg-blue);text-align:center;padding:80px 0}
#cta-section .cta-title{font-size:2.8rem;font-weight:800;color:#fff;line-height:1.15;margin-bottom:16px}
#cta-section .cta-desc{font-size:1.1rem;color:rgba(255,255,255,.85);margin-bottom:36px}
#cta-section .cta-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
#cta-section .cta-btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:12px;font-weight:700;font-size:1rem;text-decoration:none;transition:all .2s ease}
#cta-section .cta-btn.white{background:#fff;color:var(--tg-blue)}
#cta-section .cta-btn.white:hover{background:#e8f7fe;transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
#cta-section .cta-btn.outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.5)}
#cta-section .cta-btn.outline:hover{border-color:#fff;background:rgba(255,255,255,.1);transform:translateY(-2px)}
@media (max-width:768px){
    #cta-section .cta-title{font-size:2rem}
    #cta-section .cta-desc{font-size:1rem}
}