*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#d9480f;
  --primary-dark:#bf400d;
  --text:#2d3436;
  --text-light:#636e72;
  --bg:#fff;
  --bg-light:#f5f6fa;
  --border:#dfe6e9;
  --shadow:0 2px 14px rgba(0,0,0,.07);
  --radius:10px;
  --max-width:1180px;
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);line-height:1.75;background:var(--bg)}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}

.site-header{background:#fff;box-shadow:var(--shadow);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.3rem;font-weight:700;color:var(--text)}
.logo img{width:34px;height:34px}
.nav{display:flex;gap:26px;list-style:none}
.nav a{color:var(--text);font-size:.94rem;font-weight:500}
.nav a:hover,.nav a.active{color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text)}

.hero{background:linear-gradient(145deg,#fff8f3 0%,#fff 45%,#eef4ff 100%);padding:78px 0 58px;text-align:center}
.hero h1{font-size:2.55rem;font-weight:800;margin-bottom:14px;line-height:1.32}
.hero p{font-size:1.12rem;color:var(--text-light);max-width:700px;margin:0 auto 30px}
.btn{display:inline-block;padding:13px 34px;border-radius:50px;font-size:.98rem;font-weight:600;transition:all .25s;cursor:pointer;border:none}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 16px rgba(217,72,15,.32)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}

section{padding:68px 0}
.section-title{text-align:center;margin-bottom:46px}
.section-title h2{font-size:1.95rem;font-weight:700;margin-bottom:8px}
.section-title p{color:var(--text-light);font-size:1.02rem}
.bg-light{background:var(--bg-light)}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:#fff;border-radius:var(--radius);padding:34px 26px;box-shadow:var(--shadow);text-align:center;transition:transform .25s}
.feature-card:hover{transform:translateY(-4px)}
.feature-icon{width:60px;height:60px;margin:0 auto 18px;background:linear-gradient(135deg,var(--primary),#ff7675);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff}
.feature-card h3{font-size:1.18rem;margin-bottom:10px}
.feature-card p{color:var(--text-light);font-size:.93rem}

.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stat-item{padding:28px 14px}
.stat-item .number{font-size:2.35rem;font-weight:800;color:var(--primary)}
.stat-item .label{margin-top:6px;color:var(--text-light);font-size:.93rem}

.testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.testimonial-card{background:#fff;border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);position:relative}
.testimonial-card::before{content:"\201C";font-size:2.8rem;color:var(--primary);opacity:.28;position:absolute;top:8px;left:18px;line-height:1}
.testimonial-card p{color:var(--text-light);font-size:.93rem;margin-bottom:14px;padding-top:18px;font-style:italic}
.testimonial-card .author{font-weight:600;font-size:.88rem}

.faq-list{max-width:780px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);padding:18px 0}
.faq-question{width:100%;background:none;border:none;text-align:left;font-size:1.03rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--text);padding:0;font-family:inherit}
.faq-question::after{content:"+";font-size:1.35rem;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--text-light);font-size:.93rem}
.faq-item.open .faq-answer{max-height:500px;padding-top:12px}

.security-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.security-card{background:#fff;border-radius:var(--radius);padding:30px 22px;box-shadow:var(--shadow);text-align:center}
.security-card h3{margin:14px 0 8px;font-size:1.08rem}
.security-card p{color:var(--text-light);font-size:.9rem}

.download-hero{padding:58px 0;text-align:center;background:linear-gradient(145deg,#fff8f3,#eef4ff)}
.download-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:26px;margin-top:38px}
.download-card{background:#fff;border-radius:var(--radius);padding:34px 26px;box-shadow:var(--shadow);text-align:center;transition:transform .25s}
.download-card:hover{transform:translateY(-4px)}
.download-card .platform-icon{font-size:2.8rem;margin-bottom:14px}
.download-card h3{margin-bottom:6px}
.download-card p{color:var(--text-light);font-size:.88rem;margin-bottom:18px}
.download-card .version{color:var(--text-light);font-size:.84rem;margin-bottom:14px}
.system-req{max-width:780px;margin:48px auto 0;background:#fff;border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.system-req h3{margin-bottom:18px;text-align:center}
.system-req table{width:100%;border-collapse:collapse}
.system-req th,.system-req td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:.9rem}
.system-req th{background:var(--bg-light);font-weight:600}

.article-header{padding:48px 0 28px;background:var(--bg-light)}
.article-header h1{font-size:1.95rem;margin-bottom:10px;line-height:1.38}
.article-meta{color:var(--text-light);font-size:.88rem}
.article-body{max-width:780px;margin:0 auto;padding:38px 20px}
.article-body h2{font-size:1.35rem;margin:30px 0 12px;color:var(--text)}
.article-body h3{font-size:1.12rem;margin:22px 0 8px}
.article-body p{margin-bottom:15px;color:var(--text-light);font-size:.96rem}
.article-body ul,.article-body ol{margin:0 0 15px 22px;color:var(--text-light);font-size:.96rem}
.article-body li{margin-bottom:7px}
.article-nav{display:flex;justify-content:space-between;margin-top:38px;padding-top:22px;border-top:1px solid var(--border);flex-wrap:wrap;gap:12px}
.daily-tip{background:#fff8f3;border-left:4px solid var(--primary);padding:14px 18px;margin-bottom:22px;border-radius:0 var(--radius) var(--radius) 0;font-size:.93rem;color:var(--text-light)}

.articles-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:26px}
.article-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s}
.article-card:hover{transform:translateY(-3px)}
.article-card-body{padding:22px}
.article-card-body h3{margin-bottom:8px;font-size:1.08rem}
.article-card-body p{color:var(--text-light);font-size:.9rem;margin-bottom:12px}
.article-meta{display:flex;justify-content:space-between;font-size:.82rem;color:var(--text-light)}
.update-badge{display:inline-block;background:var(--bg-light);color:var(--text-light);font-size:.82rem;padding:4px 12px;border-radius:20px;margin-top:8px}
.update-note{text-align:center;color:var(--text-light);font-size:.88rem;margin-top:20px}

.site-footer{background:#2d3436;color:#b2bec3;padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:38px;margin-bottom:32px}
.footer-grid h4{color:#fff;margin-bottom:14px;font-size:.98rem}
.footer-grid p,.footer-grid li{font-size:.88rem;line-height:2}
.footer-grid ul{list-style:none}
.footer-grid a{color:#b2bec3}
.footer-grid a:hover{color:#fff}
.footer-bottom{text-align:center;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);font-size:.84rem}

.breadcrumb{padding:14px 0;font-size:.86rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}

.auto-articles .loading{text-align:center;color:var(--text-light);padding:28px}

@media(max-width:900px){
  .features-grid,.testimonials-grid,.security-grid,.stats-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:1.95rem}
}
@media(max-width:768px){
  .nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;padding:14px 20px;box-shadow:var(--shadow);gap:0}
  .nav.open{display:flex}
  .nav li{padding:10px 0;border-bottom:1px solid var(--border)}
  .nav-toggle{display:block}
  .header-inner{position:relative}
}