*,::before,::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Noto Sans SC',system-ui,-apple-system,sans-serif;background:#fff;color:#0f172a;line-height:1.5;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{cursor:pointer;border:none;background:none;font:inherit}

.container{max-width:1200px;margin:0 auto;padding:0 1rem}
@media(min-width:640px){.container{padding:0 1.5rem}}
@media(min-width:1024px){.container{padding:0 2rem}}

/* ── NAV ── */
.nav{background:#000;position:sticky;top:0;z-index:50}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;align-items:center;justify-content:space-between;height:56px}
.nav-brand{display:flex;align-items:center;gap:.75rem}
.nav-logo{width:36px;height:36px;border-radius:8px;object-fit:contain}
.nav-name{font-size:1.1rem;font-weight:700;color:#fff}

/* ── HERO ── */
.hero{background:linear-gradient(180deg,#7dd3fc 0%,#bae6fd 25%,#e0f2fe 55%,#f0f9ff 80%,#fff 100%);position:relative;overflow:hidden;padding:2.5rem 0 5rem}
.hero-inner{max-width:1200px;margin:0 auto;padding:0 1rem;display:grid;grid-template-columns:1fr;gap:2rem;align-items:center}
@media(min-width:1024px){.hero-inner{grid-template-columns:1fr 1fr;gap:3rem;padding:0 2rem}}
.hero-content{order:1}
.hero-image{order:2;display:flex;justify-content:center;align-items:flex-end}
@media(min-width:1024px){.hero-image{height:480px;justify-content:flex-end;align-items:flex-end}}
.hero-mascot{width:100%;max-width:400px}
@media(min-width:1024px){.hero-mascot{max-width:480px}}

.hero-title{font-size:2rem;font-weight:800;color:#0f172a;line-height:1.2;margin-bottom:1rem}
@media(min-width:640px){.hero-title{font-size:2.5rem}}
@media(min-width:1024px){.hero-title{font-size:3rem}}
.hero-desc{font-size:1rem;color:#374151;line-height:1.75;margin-bottom:1.5rem}
@media(min-width:640px){.hero-desc{font-size:1.0625rem}}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;max-width:380px;margin-bottom:1.5rem}
.stat-circle{display:flex;flex-direction:column;align-items:center;justify-content:center;width:88px;height:88px;border-radius:50%;border:4px solid #fff;box-shadow:0 4px 16px rgba(0,0,0,.12);color:#fff;text-align:center;padding:.5rem}
@media(min-width:640px){.stat-circle{width:104px;height:104px}}
.stat-circle.blue{background:linear-gradient(135deg,#3b82f6,#8b5cf6)}
.stat-circle.purple{background:linear-gradient(135deg,#8b5cf6,#ec4899)}
.stat-circle.pink{background:linear-gradient(135deg,#ec4899,#f97316)}
.stat-val{font-size:1.5rem;font-weight:800;line-height:1}
@media(min-width:640px){.stat-val{font-size:1.75rem}}
.stat-val sup{font-size:.75rem;font-weight:600}
.stat-label{font-size:.7rem;font-weight:500;margin-top:.2rem}
@media(min-width:640px){.stat-label{font-size:.75rem}}

.dl-section{margin-bottom:1rem}
.dl-primary-btn{display:inline-flex;align-items:center;gap:.75rem;background:#fff;color:#0f172a;padding:.75rem 2rem;border-radius:9999px;font-size:1rem;font-weight:600;box-shadow:0 2px 12px rgba(0,0,0,.12);border:2px solid #000;transition:all .2s}
.dl-primary-btn:hover{background:#f1f5f9;transform:translateY(-1px)}
.dl-primary-btn:disabled{opacity:.5;cursor:wait}
.spinner{width:20px;height:20px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.dl-fallback{display:none}
.dl-fallback.show{display:block;margin-top:1rem}
.dl-fallback-hint{font-size:.875rem;color:#374151;margin-bottom:.75rem}
.dl-links{display:flex;flex-wrap:wrap;gap:.5rem}
.dl-link{display:inline-flex;align-items:center;gap:.5rem;background:#fff;color:#0f172a;padding:.5rem 1rem;border-radius:9999px;font-size:.875rem;font-weight:500;border:1px solid #d1d5db;box-shadow:0 1px 4px rgba(0,0,0,.07);transition:background .15s}
.dl-link:hover{background:#f8fafc}
.dl-link svg{width:20px;height:20px;flex-shrink:0}

.platform-row{display:flex;align-items:center;gap:1rem;margin-bottom:.5rem}
.platform-label{font-size:.9375rem;font-weight:500;color:#0f172a}
.platform-icons{display:flex;gap:.625rem}
.platform-icon{width:42px;height:42px;background:#0f172a;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;opacity:.45}
.platform-icon svg{width:22px;height:22px}
.platform-hint{font-size:.8125rem;color:#6b7280;margin-bottom:.75rem}

.ip-badge{display:inline-flex;align-items:center;gap:.5rem;font-size:.75rem;color:#475569;background:rgba(186,230,253,.4);padding:.375rem .875rem;border-radius:9999px;border:1px solid #bae6fd}
.ip-badge svg{width:14px;height:14px;color:#0284c7;flex-shrink:0}

/* wave divider */
.wave-divider{display:block;width:100%;height:80px;margin-bottom:-2px}

/* ── WHY ── */
.why{background:linear-gradient(180deg,#0f172a 0%,#1e293b 100%);padding:4rem 0}
@media(min-width:1024px){.why{padding:6rem 0}}
.section-header{text-align:center;margin-bottom:3rem}
.section-title{font-size:1.75rem;font-weight:800;color:#fff;margin-bottom:.75rem}
@media(min-width:640px){.section-title{font-size:2.25rem}}
@media(min-width:1024px){.section-title{font-size:2.75rem}}
.section-sub{font-size:1rem;color:#94a3b8;max-width:640px;margin:0 auto;line-height:1.75}
@media(min-width:640px){.section-sub{font-size:1.0625rem}}

.feature-grid{display:grid;grid-template-columns:1fr;gap:1.25rem}
@media(min-width:1024px){.feature-grid{grid-template-columns:1fr 1fr;gap:1.5rem}}

.feature-card{background:linear-gradient(135deg,#1e293b,#0f172a);border-radius:1.5rem;padding:2rem 2rem 2.25rem;border:1px solid #334155;transition:border-color .3s}
.feature-card:hover{border-color:#3b82f6}
.feature-tag{display:inline-flex;align-items:center;gap:.375rem;background:linear-gradient(90deg,#f97316,#ef4444);color:#fff;padding:.375rem 1rem;border-radius:9999px;font-size:.8125rem;font-weight:600;margin-bottom:1rem}
.feature-card h3{font-size:1.3125rem;font-weight:800;color:#fff;margin-bottom:.75rem;line-height:1.3}
@media(min-width:640px){.feature-card h3{font-size:1.5rem}}
.feature-card p{font-size:.9375rem;color:#94a3b8;line-height:1.8}

/* ── FOOTER ── */
.footer{background:#000;color:#94a3b8;padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2rem;margin-bottom:2rem}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(3,1fr)}}
.footer-col h4{color:#fff;font-size:.9375rem;font-weight:600;margin-bottom:.875rem}
.footer-col ul{display:flex;flex-direction:column;gap:.5rem}
.footer-col a{font-size:.875rem;transition:color .15s}
.footer-col a:hover{color:#fff}
.social-row{display:flex;gap:.625rem;margin-top:.875rem}
.social-btn{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:opacity .15s}
.social-btn:hover{opacity:.8}
.social-btn svg{width:16px;height:16px;color:#fff}
.social-twitter{background:#1d9bf0}
.social-fb{background:#1877f2}
.social-ig{background:linear-gradient(135deg,#833ab4,#fd1d1d,#f77737)}
.social-tg{background:#229ed9}
.footer-divider{border:none;border-top:1px solid #1e293b;margin-bottom:1.25rem}
.footer-copy{text-align:center;font-size:.8125rem;color:#475569}