*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2ecc71;--primary-dark:#27ae60;--secondary:#1abc9c;--dark:#2c3e50;--light:#ecf0f1;--gray:#95a5a6;--white:#fff;--shadow:0 4px 20px rgba(0,0,0,.08);--radius:12px}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:var(--dark);line-height:1.7;background:var(--white)}
a{text-decoration:none;color:inherit;transition:all .3s}
a:hover{color:var(--primary)}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:36px;margin-bottom:15px;color:var(--dark)}
.section-title p{font-size:18px;color:var(--gray)}
.btn{display:inline-block;padding:14px 32px;border-radius:50px;font-weight:600;transition:all .3s;cursor:pointer;border:none;font-size:16px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:var(--white);box-shadow:0 4px 15px rgba(46,204,113,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(46,204,113,.5);color:var(--white)}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:var(--white)}

/* Header */
.header{position:fixed;top:0;left:right:0;width:100%;z-index:1000;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.05);transition:all .3s}
.header .container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:var(--dark)}
.logo img{width:36px;height:36px;border-radius:8px}
.nav{display:flex;align-items:center;gap:30px}
.nav a{font-weight:500;color:var(--dark)}
.nav a:hover{color:var(--primary)}
.nav .btn{padding:10px 24px}
.mobile-menu{display:none;font-size:24px;cursor:pointer}

/* Hero */
.hero{padding:140px 0 80px;background:linear-gradient(135deg,#f0fdf4 0%,#ecfdf5 50%,#f0f9ff 100%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(46,204,113,.1) 0%,transparent 70%);border-radius:50%}
.hero .container{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-content h1{font-size:48px;line-height:1.2;margin-bottom:20px}
.hero-content h1 span{color:var(--primary)}
.hero-content p{font-size:18px;color:var(--gray);margin-bottom:30px;line-height:1.8}
.hero-buttons{display:flex;gap:15px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:40px}
.hero-stats .stat{text-align:center}
.hero-stats .stat-num{font-size:32px;font-weight:700;color:var(--primary)}
.hero-stats .stat-label{font-size:14px;color:var(--gray)}

/* Phone Simulator */
.phone-simulator{position:relative;display:flex;justify-content:center}
.phone-frame{width:280px;height:560px;background:var(--dark);border-radius:40px;padding:12px;box-shadow:0 20px 60px rgba(0,0,0,.2);position:relative}
.phone-frame::before{content:'';position:absolute;top:15px;left:50%;transform:translateX(-50%);width:80px;height:6px;background:#1a1a1a;border-radius:3px}
.phone-screen{width:100%;height:100%;background:linear-gradient(180deg,#1a1a2e 0%,#16213e 100%);border-radius:30px;overflow:hidden;position:relative}
.sim-header{padding:40px 20px 15px;text-align:center}
.sim-header .sim-logo{width:50px;height:50px;background:var(--primary);border-radius:50%;margin:0 auto 10px;display:flex;align-items:center;justify-content:center}
.sim-header .sim-logo svg{width:30px;height:30px;fill:var(--white)}
.sim-header h3{color:var(--white);font-size:16px;margin-bottom:5px}
.sim-header p{color:rgba(255,255,255,.6);font-size:12px}
.sim-status{padding:15px 20px;text-align:center}
.sim-status .status-dot{width:12px;height:12px;background:var(--primary);border-radius:50%;display:inline-block;margin-right:8px;animation:pulse 2s infinite}
.sim-status span{color:var(--primary);font-weight:600}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.sim-server{padding:10px 20px}
.sim-server select{width:100%;padding:12px 15px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:10px;color:var(--white);font-size:14px;appearance:none}
.sim-connect{padding:20px;text-align:center}
.sim-connect-btn{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));border:none;cursor:pointer;box-shadow:0 4px 20px rgba(46,204,113,.4);display:flex;align-items:center;justify-content:center;margin:0 auto}
.sim-connect-btn svg{width:30px;height:30px;fill:var(--white)}
.sim-info{padding:10px 20px;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.sim-info-item{background:rgba(255,255,255,.05);padding:10px;border-radius:8px;text-align:center}
.sim-info-item label{display:block;color:rgba(255,255,255,.5);font-size:11px;margin-bottom:3px}
.sim-info-item span{color:var(--white);font-size:13px;font-weight:600}

/* Announcement */
.announcement{background:linear-gradient(135deg,var(--primary),var(--secondary));padding:15px 0;overflow:hidden}
.announcement-content{display:flex;align-items:center;gap:15px;white-space:nowrap;animation:scroll 30s linear infinite}
.announcement-content span{color:var(--white);font-size:14px}
.announcement-tag{background:rgba(255,255,255,.2);padding:4px 12px;border-radius:20px;font-size:12px;color:var(--white)}
@keyframes scroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* Speed Test */
.speed-section{background:var(--light)}
.speed-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.speed-card{background:var(--white);padding:25px;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow);transition:all .3s}
.speed-card:hover{transform:translateY(-5px)}
.speed-card .flag{font-size:36px;margin-bottom:10px}
.speed-card .location{font-weight:600;margin-bottom:8px}
.speed-card .ping{color:var(--primary);font-weight:700;font-size:18px}
.speed-card .ping small{font-size:12px;color:var(--gray);font-weight:400}

/* Features */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.feature-card{background:var(--white);padding:35px;border-radius:var(--radius);box-shadow:var(--shadow);transition:all .3s;border:1px solid transparent}
.feature-card:hover{border-color:var(--primary);transform:translateY(-5px)}
.feature-icon{width:60px;height:60px;background:linear-gradient(135deg,rgba(46,204,113,.1),rgba(26,188,156,.1));border-radius:15px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.feature-icon svg{width:30px;height:30px;fill:var(--primary)}
.feature-card h3{font-size:20px;margin-bottom:12px}
.feature-card p{color:var(--gray);font-size:15px}

/* Comparison */
.comparison-section{background:var(--light)}
.comparison-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.comparison-table th,.comparison-table td{padding:18px 20px;text-align:center;border-bottom:1px solid var(--light)}
.comparison-table th{background:var(--dark);color:var(--white);font-weight:600}
.comparison-table th.highlight{background:var(--primary)}
.comparison-table td.highlight{background:rgba(46,204,113,.05)}
.comparison-table tr:last-child td{border-bottom:none}
.check{color:var(--primary);font-weight:700}
.cross{color:#e74c3c}

/* Download */
.download-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.download-card{background:var(--white);padding:30px 20px;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow);transition:all .3s}
.download-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.download-card .platform-icon{width:60px;height:60px;margin:0 auto 15px;display:flex;align-items:center;justify-content:center;background:var(--light);border-radius:15px}
.download-card .platform-icon svg{width:32px;height:32px;fill:var(--dark)}
.download-card h4{margin-bottom:8px}
.download-card p{font-size:13px;color:var(--gray);margin-bottom:15px}
.download-card .btn{padding:10px 20px;font-size:14px;width:100%}

/* Scenarios */
.scenarios-section{background:linear-gradient(135deg,#f0fdf4,#ecfdf5)}
.scenarios-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}
.scenario-card{background:var(--white);padding:30px;border-radius:var(--radius);text-align:center;box-shadow:var(--shadow)}
.scenario-card .scenario-icon{font-size:40px;margin-bottom:15px}
.scenario-card h4{margin-bottom:10px}
.scenario-card p{font-size:14px;color:var(--gray)}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.faq-item{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.faq-question{padding:20px 25px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all .3s}
.faq-question:hover{background:rgba(46,204,113,.05)}
.faq-question::after{content:'+';font-size:24px;color:var(--primary);transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:all .3s}
.faq-item.active .faq-answer{padding:0 25px 20px;max-height:500px}
.faq-answer p{color:var(--gray);line-height:1.8}
.faq-answer .steps{margin-top:10px}
.faq-answer .step{display:flex;gap:10px;margin-bottom:8px}
.faq-answer .step-num{width:24px;height:24px;background:var(--primary);color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0}
.faq-answer .step-text{color:var(--gray);font-size:14px}

/* Reviews */
.reviews-section{background:var(--light)}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.review-card{background:var(--white);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow)}
.review-header{display:flex;align-items:center;gap:15px;margin-bottom:15px}
.review-avatar{width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:700;font-size:18px}
.review-info h5{margin-bottom:3px}
.review-info .stars{color:#f39c12;font-size:14px}
.review-card p{color:var(--gray);font-size:15px;line-height:1.7}

/* News */
.news-tabs{display:flex;gap:10px;margin-bottom:30px;flex-wrap:wrap;justify-content:center}
.news-tab{padding:10px 20px;border-radius:25px;background:var(--light);cursor:pointer;transition:all .3s;font-weight:500}
.news-tab.active,.news-tab:hover{background:var(--primary);color:var(--white)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}
.news-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s}
.news-card:hover{transform:translateY(-5px)}
.news-card img{width:100%;height:180px;object-fit:cover}
.news-card-content{padding:20px}
.news-card .category{display:inline-block;padding:4px 12px;background:rgba(46,204,113,.1);color:var(--primary);border-radius:15px;font-size:12px;margin-bottom:10px}
.news-card h4{margin-bottom:10px;font-size:17px;line-height:1.4}
.news-card h4 a:hover{color:var(--primary)}
.news-card .meta{display:flex;gap:15px;font-size:13px;color:var(--gray)}

/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),var(--secondary));padding:80px 0;text-align:center}
.cta-section h2{color:var(--white);font-size:36px;margin-bottom:15px}
.cta-section p{color:rgba(255,255,255,.9);font-size:18px;margin-bottom:30px}
.cta-section .btn{background:var(--white);color:var(--primary)}
.cta-section .btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.2)}

/* Footer */
.footer{background:var(--dark);color:rgba(255,255,255,.7);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .logo{color:var(--white);margin-bottom:15px}
.footer-brand p{font-size:14px;line-height:1.8}
.footer h4{color:var(--white);margin-bottom:20px;font-size:16px}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:14px;transition:color .3s}
.footer ul li a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:30px;text-align:center;font-size:14px}
.footer-bottom a{color:var(--primary)}

/* Breadcrumb */
.breadcrumb{padding:100px 0 20px;background:var(--light)}
.breadcrumb-list{display:flex;gap:10px;align-items:center;font-size:14px;color:var(--gray)}
.breadcrumb-list a{color:var(--gray)}
.breadcrumb-list a:hover{color:var(--primary)}
.breadcrumb-list span{color:var(--dark)}

/* Article */
.article-section{padding:50px 0}
.article-container{display:grid;grid-template-columns:1fr 300px;gap:40px}
.article-main{background:var(--white);padding:40px;border-radius:var(--radius);box-shadow:var(--shadow)}
.article-main h1{font-size:32px;margin-bottom:15px;line-height:1.4}
.article-meta{display:flex;gap:20px;margin-bottom:25px;padding-bottom:20px;border-bottom:1px solid var(--light);font-size:14px;color:var(--gray)}
.article-content h2{font-size:24px;margin:30px 0 15px;padding-left:12px;border-left:4px solid var(--primary)}
.article-content p{margin-bottom:15px;color:#444;line-height:1.9}
.article-content img{border-radius:var(--radius);margin:20px 0}
.article-content table{width:100%;border-collapse:collapse;margin:20px 0}
.article-content table th,.article-content table td{padding:12px 15px;border:1px solid var(--light);text-align:left}
.article-content table th{background:var(--light);font-weight:600}
.article-nav{display:flex;justify-content:space-between;margin-top:40px;padding-top:20px;border-top:1px solid var(--light)}
.article-nav a{color:var(--primary);font-size:14px}

/* Sidebar */
.sidebar{display:flex;flex-direction:column;gap:25px}
.sidebar-widget{background:var(--white);padding:25px;border-radius:var(--radius);box-shadow:var(--shadow)}
.sidebar-widget h4{margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid var(--primary)}
.sidebar-widget ul{list-style:none}
.sidebar-widget ul li{margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid var(--light)}
.sidebar-widget ul li:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}
.sidebar-widget ul li a{font-size:14px;color:var(--dark)}
.sidebar-widget ul li a:hover{color:var(--primary)}

/* Comments */
.comments-section{margin-top:40px}
.comments-section h3{margin-bottom:20px}
.comment-item{display:flex;gap:15px;padding:20px 0;border-bottom:1px solid var(--light)}
.comment-item:last-child{border-bottom:none}
.comment-avatar{width:45px;height:45px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;color:var(--white);font-weight:700;flex-shrink:0}
.comment-content h5{margin-bottom:5px}
.comment-content .comment-date{font-size:12px;color:var(--gray);margin-bottom:8px}
.comment-content p{font-size:14px;color:#555}

/* Related Articles */
.related-section{margin-top:40px;padding-top:30px;border-top:1px solid var(--light)}
.related-section h3{margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.related-card{background:var(--light);padding:20px;border-radius:var(--radius)}
.related-card h5{font-size:15px;margin-bottom:8px;line-height:1.4}
.related-card h5 a:hover{color:var(--primary)}
.related-card .meta{font-size:12px;color:var(--gray)}

/* Responsive */
@media(max-width:1024px){
.hero .container{grid-template-columns:1fr}
.phone-simulator{margin-top:40px}
.features-grid,.reviews-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
.download-grid{grid-template-columns:repeat(3,1fr)}
.scenarios-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
.article-container{grid-template-columns:1fr}
}
@media(max-width:768px){
.nav{display:none}
.mobile-menu{display:block}
.hero-content h1{font-size:32px}
.features-grid,.faq-grid,.reviews-grid,.news-grid{grid-template-columns:1fr}
.download-grid{grid-template-columns:repeat(2,1fr)}
.scenarios-grid{grid-template-columns:1fr}
.comparison-table{font-size:13px}
.comparison-table th,.comparison-table td{padding:12px 10px}
.footer-grid{grid-template-columns:1fr}
.related-grid{grid-template-columns:1fr}
}