/* Site 1 Root — Centered hero, Telegram blue, soft cards */
:root{
  --bg:#f4f8fc;--surface:#fff;--text:#15202b;--muted:#5b6b7c;
  --brand:#2aabee;--brand-dark:#1e96d1;--accent:#229ed9;
  --line:#d9e6f2;--radius:16px;--shadow:0 10px 30px rgba(42,171,238,.12);
  --max:1120px;--nav-h:72px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;font-size:16px}
a{color:var(--brand-dark);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{display:block;max-width:100%}
.container{width:min(100% - 32px,var(--max));margin:0 auto}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text);text-decoration:none}
.logo svg{width:36px;height:36px;color:var(--brand)}
.nav-links{display:flex;gap:8px;list-style:none;flex-wrap:wrap}
.nav-links a{display:block;padding:8px 14px;border-radius:999px;color:var(--muted);font-weight:600;text-decoration:none}
.nav-links a:hover{background:#e8f6fd;color:var(--brand-dark)}
.nav-links a.active{background:var(--brand);color:#fff}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;font-weight:700;border-radius:12px;padding:12px 20px;font-size:1rem;transition:background .2s,transform .15s,box-shadow .2s}
.btn svg{width:18px;height:18px}
.btn:disabled{opacity:.7;cursor:wait}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--brand-dark)}
.btn-secondary{background:#fff;color:var(--brand-dark);border:1px solid var(--line)}
.btn-secondary:hover{border-color:var(--brand);background:#f0f9ff}
.btn-lg{padding:16px 28px;font-size:1.05rem;border-radius:14px}
.hero{padding:72px 0 56px;text-align:center;background:linear-gradient(180deg,#e8f6fd 0%,var(--bg) 70%)}
.hero-badge{display:inline-block;background:#fff;border:1px solid var(--line);color:var(--brand-dark);padding:6px 14px;border-radius:999px;font-size:.875rem;font-weight:700;margin-bottom:18px}
.hero h1{font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.25;margin-bottom:16px;letter-spacing:-.02em}
.hero .lead{max-width:720px;margin:0 auto 28px;color:var(--muted);font-size:1.1rem}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:28px}
.hero-visual{margin:36px auto 0;width:min(100%,640px);aspect-ratio:16/10;border-radius:24px;background:linear-gradient(135deg,#2aabee,#1c8fd6 45%,#0f5f99);box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero-visual::after{content:"";position:absolute;inset:18% 12%;border-radius:18px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25)}
.section{padding:64px 0}
.section.alt{background:#fff}
.section-head{text-align:center;max-width:720px;margin:0 auto 40px}
.section-head h2{font-size:clamp(1.5rem,3vw,2rem);margin-bottom:12px}
.section-head p{color:var(--muted)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 4px 16px rgba(21,32,43,.04)}
.feature-card .icon{width:48px;height:48px;color:var(--brand);margin-bottom:14px}
.feature-card h3{font-size:1.1rem;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:.95rem}
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.platform-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center}
.platform-card .icon{width:40px;height:40px;margin:0 auto 12px;color:var(--text)}
.platform-card h3{margin-bottom:8px}
.platform-card p{color:var(--muted);font-size:.9rem;margin-bottom:14px;min-height:3.2em}
.deep-list{display:grid;gap:28px}
.deep-item{display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.deep-item .icon-wrap{width:96px;height:96px;border-radius:20px;background:#e8f6fd;color:var(--brand);display:grid;place-items:center}
.deep-item .icon-wrap svg{width:48px;height:48px}
.deep-item h3{margin-bottom:10px;font-size:1.25rem}
.deep-item p{color:var(--muted);margin-bottom:10px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:linear-gradient(160deg,var(--brand),#1177b0);color:#fff;border-radius:var(--radius);padding:24px;text-align:center}
.stat strong{display:block;font-size:1.8rem;margin-bottom:6px}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.review .name{font-weight:700;margin:8px 0 6px}
.review p{color:var(--muted);font-size:.95rem}
.stars{display:inline-flex;gap:2px;color:#f5a623}
.stars svg{width:16px;height:16px}
.compare-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.compare{width:100%;border-collapse:collapse;min-width:640px}
table.compare th,table.compare td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left}
table.compare th{background:#e8f6fd}
table.compare td.yes{color:#0a7a3e;font-weight:700}
table.compare td.no{color:#a33;font-weight:600}
.faq-list{max-width:800px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 18px}
.faq-item summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-body{padding:0 0 16px;color:var(--muted)}
.site-footer{background:#102433;color:#c9d7e3;padding:40px 0 28px;margin-top:40px}
.site-footer .foot-safe{font-weight:600;color:#fff;margin-bottom:10px}
.site-footer p{font-size:.9rem;line-height:1.6}
.cta-band{background:linear-gradient(90deg,#1e96d1,#2aabee);color:#fff;border-radius:var(--radius);padding:36px;text-align:center}
.cta-band h2{margin-bottom:10px}
.cta-band p{margin-bottom:18px;opacity:.95}
.cta-band .btn{background:#fff;color:var(--brand-dark)}
.article-prose h2{margin:32px 0 12px;font-size:1.4rem}
.article-prose h3{margin:22px 0 10px}
.article-prose p{color:var(--muted);margin-bottom:14px}
.article-prose ul{margin:0 0 16px 1.2em;color:var(--muted)}
.dl-hero{padding:56px 0;background:linear-gradient(135deg,#e8f6fd,#fff)}
.dl-main{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center}
.dl-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.meta-list{display:grid;gap:8px;margin:16px 0 22px;color:var(--muted)}
.steps{display:grid;gap:14px;counter-reset:step}
.step{display:grid;grid-template-columns:40px 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.step .num{width:40px;height:40px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800}
.changelog{display:grid;gap:12px}
.change{background:#fff;border-left:4px solid var(--brand);border-radius:0 12px 12px 0;padding:16px 18px;border:1px solid var(--line);border-left-width:4px}
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.req-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.req-card h3{margin-bottom:8px}
.req-card li{margin-left:1.1em;color:var(--muted)}
.safe-box{background:#eef9f1;border:1px solid #b7e0c2;border-radius:var(--radius);padding:22px}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
@media (max-width:960px){
  .feature-grid,.reviews,.stats,.platform-grid{grid-template-columns:repeat(2,1fr)}
  .dl-main,.deep-item,.req-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .feature-grid,.reviews,.stats,.platform-grid{grid-template-columns:1fr}
  .nav-links{gap:4px}
  .nav-links a{padding:6px 10px;font-size:.9rem}
}