/* ================================================================
   apps-chrome-google-com.hl.cn — Dark Glassmorphism Theme
   Unique: dark base + neon accents + glass panels + split layouts
   ================================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:#e4e4e7;background:#0c0a15;line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{cursor:pointer;font-family:inherit}
ul,ol{list-style:none}

@keyframes spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes glow{0%,100%{box-shadow:0 0 20px rgba(99,102,241,.3)}50%{box-shadow:0 0 40px rgba(99,102,241,.6)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:.6}50%{opacity:1}}
@keyframes orbit{from{transform:rotate(0deg) translateX(120px) rotate(0deg)}to{transform:rotate(360deg) translateX(120px) rotate(-360deg)}}

/* === Layout === */
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ============ NAVIGATION — floating glass bar ============ */
.topnav{
  position:sticky;top:0;z-index:500;
  background:rgba(12,10,21,.75);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(99,102,241,.15);
}
.topnav .wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:60px;
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-weight:800;font-size:1.05rem;letter-spacing:.4px;
  color:#a5b4fc;
}
.brand svg{width:28px;height:28px;flex-shrink:0}
.navlist{display:flex;align-items:center;gap:6px}
.navlist a{
  display:inline-block;padding:7px 18px;border-radius:8px;
  font-size:.9rem;font-weight:600;color:#94a3b8;
  transition:all .25s;
}
.navlist a:hover{color:#e0e7ff;background:rgba(99,102,241,.12)}
.navlist a.on{color:#fff;background:linear-gradient(135deg,#6366f1,#8b5cf6);box-shadow:0 0 14px rgba(99,102,241,.35)}

/* ============ HERO — split layout ============ */
.hero-split{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  padding:80px 24px 70px;
  position:relative;
}
.hero-text h1{
  font-size:2.8rem;font-weight:900;line-height:1.2;
  background:linear-gradient(135deg,#c7d2fe,#a78bfa,#818cf8);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  margin-bottom:18px;
}
.hero-text p{
  font-size:1.15rem;color:#a1a1aa;margin-bottom:28px;max-width:480px;
}
.hero-visual{
  position:relative;display:flex;align-items:center;justify-content:center;
  min-height:320px;
}
.hero-orb{
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#6366f1,#312e81);
  box-shadow:0 0 80px rgba(99,102,241,.35),inset 0 0 60px rgba(99,102,241,.2);
  position:relative;
  animation:glow 4s ease-in-out infinite;
}
.hero-orb svg{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:100px;height:100px;color:rgba(255,255,255,.85);
}
.orbit-dot{
  position:absolute;top:50%;left:50%;width:14px;height:14px;
  border-radius:50%;margin:-7px 0 0 -7px;
}
.orbit-dot:nth-child(2){background:#34d399;animation:orbit 8s linear infinite}
.orbit-dot:nth-child(3){background:#f472b6;animation:orbit 12s linear infinite reverse}
.orbit-dot:nth-child(4){background:#fbbf24;animation:orbit 10s linear infinite}

/* ============ GLASS CARD ============ */
.glass{
  background:rgba(30,27,48,.55);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(99,102,241,.18);
  border-radius:16px;
  transition:all .3s;
}
.glass:hover{
  border-color:rgba(99,102,241,.4);
  box-shadow:0 8px 32px rgba(99,102,241,.12);
  transform:translateY(-4px);
}

/* ============ SECTION TITLES ============ */
.sec-title{
  text-align:center;padding:60px 24px 10px;
}
.sec-title h2{
  font-size:2.2rem;font-weight:800;
  background:linear-gradient(90deg,#c7d2fe,#a78bfa);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  margin-bottom:10px;
}
.sec-title p{color:#71717a;font-size:1.05rem}

/* ============ FEATURES — zigzag layout ============ */
.zigzag{padding:30px 0 60px}
.zigzag-row{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:36px 24px;
}
.zigzag-row:nth-child(even){direction:rtl}
.zigzag-row:nth-child(even)>*{direction:ltr}
.zigzag-icon{
  display:flex;align-items:center;justify-content:center;
  width:100%;aspect-ratio:4/3;
  border-radius:16px;
  background:linear-gradient(160deg,rgba(99,102,241,.12),rgba(139,92,246,.08));
  border:1px solid rgba(99,102,241,.12);
}
.zigzag-icon svg{width:80px;height:80px;color:#818cf8;opacity:.85}
.zigzag-info h3{font-size:1.5rem;font-weight:700;color:#e0e7ff;margin-bottom:12px}
.zigzag-info p{color:#a1a1aa;font-size:1rem;line-height:1.8}

/* ============ PLATFORMS — horizontal scroll strip ============ */
.platforms-strip{
  display:flex;gap:20px;padding:20px 24px 60px;
  overflow-x:auto;scroll-snap-type:x mandatory;
  -ms-overflow-style:none;scrollbar-width:none;
}
.platforms-strip::-webkit-scrollbar{display:none}
.plat-card{
  flex:0 0 260px;scroll-snap-align:start;
  padding:28px 24px;text-align:center;
}
.plat-card .plat-ico{
  width:64px;height:64px;margin:0 auto 16px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
}
.plat-card .plat-ico svg{width:32px;height:32px;color:#fff}
.plat-card h4{font-size:1.15rem;font-weight:700;color:#e0e7ff;margin-bottom:4px}
.plat-card .plat-ver{font-size:.85rem;color:#71717a;margin-bottom:14px}
.plat-card .plat-list{text-align:left;font-size:.85rem;color:#a1a1aa;margin-bottom:18px}
.plat-card .plat-list span{display:block;padding:3px 0}
.plat-card.featured{border-color:rgba(99,102,241,.5);box-shadow:0 0 28px rgba(99,102,241,.18)}
.plat-badge{
  display:inline-block;padding:4px 14px;border-radius:20px;font-size:.78rem;font-weight:700;
  background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;margin-bottom:14px;
}

/* ============ FAQ — accordion with neon left border ============ */
.faq-wrap{padding:20px 24px 70px;max-width:780px;margin:0 auto}
.faq-item{
  margin-bottom:12px;border-radius:12px;overflow:hidden;
  background:rgba(30,27,48,.45);
  border-left:3px solid #6366f1;
  transition:all .3s;
}
.faq-item:hover{background:rgba(30,27,48,.7)}
.faq-q{
  width:100%;padding:18px 20px;background:none;border:none;
  text-align:left;font-size:1rem;font-weight:600;color:#e0e7ff;
  display:flex;justify-content:space-between;align-items:center;
  transition:all .25s;
}
.faq-q:hover{color:#a5b4fc}
.faq-chevron{
  width:20px;height:20px;transition:transform .3s;color:#818cf8;flex-shrink:0;
}
.faq-item.open .faq-chevron{transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s,padding .35s;
  color:#a1a1aa;font-size:.95rem;line-height:1.8;padding:0 20px;
}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 20px}

/* ============ COMPARISON TABLE ============ */
.cmp-table-wrap{padding:20px 24px 60px;overflow-x:auto}
.cmp-table{
  width:100%;min-width:640px;border-collapse:collapse;
  background:rgba(30,27,48,.45);border-radius:12px;overflow:hidden;
}
.cmp-table thead th{
  padding:14px 16px;font-size:.9rem;font-weight:700;color:#c7d2fe;
  background:rgba(99,102,241,.15);text-align:center;
}
.cmp-table thead th:first-child{text-align:left}
.cmp-table tbody td{
  padding:12px 16px;text-align:center;font-size:.9rem;color:#a1a1aa;
  border-bottom:1px solid rgba(99,102,241,.08);
}
.cmp-table tbody td:first-child{text-align:left;font-weight:600;color:#e0e7ff}
.cmp-table tbody tr:hover{background:rgba(99,102,241,.06)}

/* ============ CTA BANNER ============ */
.cta-banner{
  max-width:900px;margin:0 auto 60px;padding:48px 32px;border-radius:20px;text-align:center;
  background:linear-gradient(135deg,#312e81,#4338ca,#6366f1);
  position:relative;overflow:hidden;
}
.cta-banner::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.08),transparent 50%);
}
.cta-banner h3{font-size:1.8rem;font-weight:800;color:#fff;margin-bottom:10px;position:relative;z-index:1}
.cta-banner p{color:#c7d2fe;margin-bottom:24px;position:relative;z-index:1}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 24px;border:none;border-radius:10px;
  font-size:.95rem;font-weight:700;
  transition:all .3s;position:relative;overflow:hidden;
}
.btn svg{width:18px;height:18px;flex-shrink:0}
.btn-neon{
  background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;
  box-shadow:0 4px 20px rgba(99,102,241,.3);
}
.btn-neon:hover{
  transform:translateY(-2px);
  box-shadow:0 6px 28px rgba(99,102,241,.5);
}
.btn-ghost{
  background:rgba(99,102,241,.1);color:#a5b4fc;
  border:1px solid rgba(99,102,241,.25);
}
.btn-ghost:hover{
  background:rgba(99,102,241,.2);color:#c7d2fe;
  transform:translateY(-2px);
}
.btn-lg{padding:14px 32px;font-size:1.05rem}
.btn-white{background:#fff;color:#4338ca;box-shadow:0 4px 16px rgba(0,0,0,.15)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(0,0,0,.2)}

/* ============ FOOTER ============ */
.site-footer{
  background:rgba(12,10,21,.9);border-top:1px solid rgba(99,102,241,.1);
  padding:36px 24px;text-align:center;
}
.security-line{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 18px;border-radius:8px;margin-bottom:14px;
  background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.25);
  font-size:.9rem;color:#6ee7b7;
}
.security-line svg{width:18px;height:18px;flex-shrink:0}
.site-footer .copy{font-size:.82rem;color:#52525b;margin-top:6px}

/* ============ RESPONSIVE ============ */
@media(max-width:768px){
  .hero-split{grid-template-columns:1fr;text-align:center;padding:50px 20px 40px}
  .hero-text p{margin:0 auto 24px}
  .hero-visual{min-height:220px;margin-top:10px}
  .hero-orb{width:180px;height:180px}
  .hero-orb svg{width:64px;height:64px}
  .zigzag-row{grid-template-columns:1fr;gap:20px}
  .zigzag-row:nth-child(even){direction:ltr}
  .sec-title h2{font-size:1.7rem}
  .hero-text h1{font-size:2rem}
  .topnav .wrap{flex-direction:column;height:auto;padding:10px 0;gap:8px}
  .plat-card{flex:0 0 85vw}
}
@media(max-width:480px){
  .hero-text h1{font-size:1.6rem}
  .sec-title h2{font-size:1.4rem}
  .cta-banner{padding:32px 18px;margin:0 12px 40px}
  .cta-banner h3{font-size:1.3rem}
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar{width:7px}
::-webkit-scrollbar-track{background:#0c0a15}
::-webkit-scrollbar-thumb{background:#312e81;border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#4338ca}