:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #e0e7ff;
  --primary-lighter: #eef2ff;
  --accent: #6366f1;
  --accent-light: #eef2ff;
  --bg: #ffffff;
  --bg-surface: #f8f8fc;
  --bg-surface-alt: #ededf5;
  --text-primary: #1e1b3a;
  --text-secondary: #656080;
  --text-muted: #9f98b8;
  --border: #d8d5e8;
  --border-light: #ededf5;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.08),0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08),0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08),0 4px 6px -2px rgba(0,0,0,0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08),0 10px 10px -5px rgba(0,0,0,0.02);
  --transition: all 0.3s ease;
  --max-width: 1200px;
  --header-height: 72px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;color:var(--text-primary);background:var(--bg);line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-height)}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text-primary)}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:700}
.nav{display:flex;align-items:center;gap:32px}
.nav a{color:var(--text-secondary);font-size:15px;font-weight:500;position:relative;padding:4px 0}
.nav a:hover,.nav a.active{color:var(--primary)}
.nav a.active::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--primary);border-radius:1px}
.nav-cta{background:var(--primary);color:#fff!important;padding:8px 20px!important;border-radius:var(--radius);font-size:14px!important}
.nav-cta:hover{background:var(--primary-dark);color:#fff!important}
.hero{padding-top:calc(var(--header-height) + 60px);padding-bottom:80px;background:linear-gradient(180deg,var(--primary-lighter) 0%,var(--bg) 100%);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-200px;right:-200px;width:600px;height:600px;background:radial-gradient(circle,rgba(0,0,0,0.06) 0%,transparent 70%);border-radius:50%}
.hero-content{display:flex;align-items:center;gap:60px}
.hero-text{flex:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--primary-light);color:var(--primary);padding:6px 16px;border-radius:20px;font-size:13px;font-weight:600;margin-bottom:24px}
.hero-badge-dot{width:6px;height:6px;background:var(--primary);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.5}}
.hero h1{font-size:42px;font-weight:800;line-height:1.2;color:var(--text-primary);margin-bottom:20px;letter-spacing:-0.5px}
.hero h1 span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:17px;color:var(--text-secondary);line-height:1.8;margin-bottom:36px;max-width:520px}
.hero-actions{display:flex;gap:16px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;border:none;transition:var(--transition);text-decoration:none}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(0,0,0,0.15)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 6px 20px rgba(0,0,0,0.2);transform:translateY(-1px)}
.btn-outline{background:var(--bg);color:var(--text-primary);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-lighter)}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-sm{padding:8px 18px;font-size:13px}
.hero-visual{flex:1;display:flex;justify-content:center;align-items:center}
.hero-illustration{width:440px;height:320px;background:linear-gradient(135deg,var(--primary-light) 0%,var(--accent-light) 100%);border-radius:var(--radius-xl);border:1px solid var(--border);box-shadow:var(--shadow-xl);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;position:relative;overflow:hidden}
.hero-illustration::before{content:"";position:absolute;top:0;left:0;right:0;height:40px;background:rgba(255,255,255,0.6);border-bottom:1px solid var(--border)}
.hero-illustration-dots{position:absolute;top:12px;left:16px;display:flex;gap:6px}
.hero-illustration-dots span{width:10px;height:10px;border-radius:50%;background:var(--border)}
.hero-illustration-dots span:first-child{background:#fca5a5}
.hero-illustration-dots span:nth-child(2){background:#fcd34d}
.hero-illustration-dots span:nth-child(3){background:#86efac}
.hero-input-demo{background:#fff;border-radius:var(--radius);padding:16px 24px;box-shadow:var(--shadow-md);width:85%}
.hero-input-demo-text{font-size:18px;color:var(--text-primary);margin-bottom:8px}
.hero-input-demo-cursor{display:inline-block;width:2px;height:20px;background:var(--primary);animation:blink 1s infinite;vertical-align:middle;margin-left:2px}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.hero-input-demo-candidates{display:flex;gap:12px;font-size:14px;color:var(--text-secondary)}
.hero-input-demo-candidates span:first-child{color:var(--primary);font-weight:600}
.section{padding:80px 0}
.section-alt{background:var(--bg-surface)}
.section-header{text-align:center;margin-bottom:56px}
.section-label{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);padding:4px 14px;border-radius:16px;font-size:13px;font-weight:600;margin-bottom:16px}
.section-title{font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:16px;letter-spacing:-0.3px}
.section-desc{font-size:16px;color:var(--text-secondary);max-width:600px;margin:0 auto;line-height:1.8}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:var(--transition)}
.feature-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.feature-icon{width:52px;height:52px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:20px}
.feature-icon-blue{background:var(--primary-light);color:var(--primary)}
.feature-icon-teal{background:var(--accent-light);color:var(--accent)}
.feature-icon-green{background:var(--success-light);color:var(--success)}
.feature-icon-orange{background:var(--warning-light);color:var(--warning)}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:12px;color:var(--text-primary)}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.8}
.platforms{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.platform-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;display:flex;align-items:flex-start;gap:24px;transition:var(--transition)}
.platform-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}
.platform-icon{width:56px;height:56px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.platform-info h3{font-size:20px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.platform-info p{font-size:14px;color:var(--text-secondary);margin-bottom:16px;line-height:1.7}
.platform-meta{display:flex;gap:16px;font-size:13px;color:var(--text-muted);margin-bottom:20px}
.platform-meta span{display:flex;align-items:center;gap:4px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.stat-card{text-align:center;padding:32px 20px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);transition:var(--transition)}
.stat-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}
.stat-number{font-size:36px;font-weight:800;color:var(--primary);margin-bottom:8px;letter-spacing:-1px}
.stat-label{font-size:14px;color:var(--text-secondary);font-weight:500}
.tutorials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.tutorial-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:var(--transition)}
.tutorial-card:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.tutorial-thumb{height:180px;background:linear-gradient(135deg,var(--primary-light),var(--accent-light));display:flex;align-items:center;justify-content:center;font-size:48px}
.tutorial-body{padding:24px}
.tutorial-tag{display:inline-block;background:var(--primary-light);color:var(--primary);padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600;margin-bottom:12px}
.tutorial-body h3{font-size:16px;font-weight:700;margin-bottom:8px;color:var(--text-primary);line-height:1.5}
.tutorial-body p{font-size:13px;color:var(--text-secondary);line-height:1.7}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--primary)}
.faq-question{padding:20px 24px;font-size:15px;font-weight:600;color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:space-between;background:var(--bg)}
.faq-question::after{content:"+";font-size:20px;color:var(--text-muted);font-weight:400}
.faq-answer{padding:0 24px 20px;font-size:14px;color:var(--text-secondary);line-height:1.8}
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);padding:80px 0;text-align:center;color:#fff}
.cta-section h2{font-size:32px;font-weight:700;margin-bottom:16px}
.cta-section p{font-size:16px;opacity:0.9;margin-bottom:32px;max-width:500px;margin-left:auto;margin-right:auto}
.cta-section .btn{background:#fff;color:var(--primary);font-weight:700}
.cta-section .btn:hover{background:var(--primary-lighter);color:var(--primary-dark)}
.footer{background:var(--text-primary);color:rgba(255,255,255,0.7);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col a{display:block;color:rgba(255,255,255,0.6);font-size:14px;padding:4px 0;transition:var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:24px;display:flex;align-items:center;justify-content:space-between;font-size:13px}
.download-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.download-card{background:var(--bg);border:2px solid var(--border);border-radius:var(--radius-xl);padding:40px;text-align:center;transition:var(--transition);position:relative;overflow:hidden}
.download-card:hover{border-color:var(--primary);box-shadow:var(--shadow-xl)}
.download-card-popular{border-color:var(--primary)}
.download-card-popular::before{content:"推荐";position:absolute;top:16px;right:-28px;background:var(--primary);color:#fff;padding:4px 36px;font-size:12px;font-weight:600;transform:rotate(45deg)}
.download-card-icon{width:72px;height:72px;margin:0 auto 20px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:36px}
.download-card h3{font-size:22px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.download-card .version{font-size:13px;color:var(--text-muted);margin-bottom:16px}
.download-card .size{font-size:14px;color:var(--text-secondary);margin-bottom:24px}
.steps{max-width:700px;margin:0 auto}
.step-item{display:flex;gap:24px;margin-bottom:32px;position:relative}
.step-item:not(:last-child)::after{content:"";position:absolute;left:23px;top:48px;bottom:-8px;width:2px;background:var(--border)}
.step-number{width:48px;height:48px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.step-content h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.step-content p{font-size:14px;color:var(--text-secondary);line-height:1.8}
.version-table{width:100%;border-collapse:collapse;background:var(--bg);border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border)}
.version-table th{background:var(--bg-surface);padding:14px 20px;text-align:left;font-size:13px;font-weight:600;color:var(--text-secondary);border-bottom:1px solid var(--border)}
.version-table td{padding:14px 20px;font-size:14px;color:var(--text-primary);border-bottom:1px solid var(--border-light)}
.version-table tr:last-child td{border-bottom:none}
.feature-detail{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:40px 0}
.feature-detail:nth-child(even){direction:rtl}
.feature-detail:nth-child(even)>*{direction:ltr}
.feature-detail-text h3{font-size:24px;font-weight:700;margin-bottom:16px;color:var(--text-primary)}
.feature-detail-text p{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:20px}
.feature-detail-visual{height:280px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:64px}
.feature-list{list-style:none}
.feature-list li{padding:8px 0;font-size:14px;color:var(--text-secondary);display:flex;align-items:center;gap:10px}
.feature-list li::before{content:"✓";color:var(--success);font-weight:700;font-size:16px}
.breadcrumb{padding:16px 0;font-size:13px;color:var(--text-muted);margin-top:var(--header-height)}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{margin:0 8px}
.tutorial-section{padding:40px 0}
.tutorial-section h2{font-size:24px;font-weight:700;margin-bottom:20px;color:var(--text-primary)}
.tutorial-section h3{font-size:18px;font-weight:600;margin-bottom:12px;color:var(--text-primary)}
.tutorial-section p{font-size:15px;color:var(--text-secondary);line-height:1.9;margin-bottom:16px}
.tutorial-section ul,.tutorial-section ol{padding-left:24px;margin-bottom:16px}
.tutorial-section li{font-size:15px;color:var(--text-secondary);line-height:1.9;margin-bottom:8px}
.tip-box{background:var(--primary-lighter);border-left:4px solid var(--primary);padding:20px 24px;border-radius:0 var(--radius) var(--radius) 0;margin:24px 0}
.tip-box h4{font-size:15px;font-weight:700;color:var(--primary);margin-bottom:8px}
.tip-box p{font-size:14px;color:var(--text-secondary);margin-bottom:0}
.warning-box{background:var(--warning-light);border-left:4px solid var(--warning);padding:20px 24px;border-radius:0 var(--radius) var(--radius) 0;margin:24px 0}
.warning-box h4{font-size:15px;font-weight:700;color:var(--warning);margin-bottom:8px}
.warning-box p{font-size:14px;color:var(--text-secondary);margin-bottom:0}
.sidebar-layout{display:grid;grid-template-columns:1fr 300px;gap:40px}
.sidebar{position:sticky;top:calc(var(--header-height) + 24px)}
.sidebar-nav{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}
.sidebar-nav h4{font-size:14px;font-weight:700;color:var(--text-primary);margin-bottom:16px}
.sidebar-nav a{display:block;padding:8px 12px;font-size:13px;color:var(--text-secondary);border-radius:var(--radius);margin-bottom:4px}
.sidebar-nav a:hover,.sidebar-nav a.active{background:var(--primary-light);color:var(--primary)}
.sidebar-download{background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:var(--radius-lg);padding:24px;color:#fff;margin-top:20px;text-align:center}
.sidebar-download h4{font-size:16px;font-weight:700;margin-bottom:8px}
.sidebar-download p{font-size:13px;opacity:0.9;margin-bottom:16px}
.sidebar-download .btn{background:#fff;color:var(--primary);font-size:13px;padding:8px 20px}
.testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.testimonial-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px}
.testimonial-card p{font-size:14px;color:var(--text-secondary);line-height:1.8;margin-bottom:16px;font-style:italic}
.testimonial-author{display:flex;align-items:center;gap:12px}
.testimonial-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary-light);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;color:var(--primary)}
.testimonial-name{font-size:14px;font-weight:600;color:var(--text-primary)}
.testimonial-role{font-size:12px;color:var(--text-muted)}
@media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}.hero-content{flex-direction:column;text-align:center}.hero-desc{margin-left:auto;margin-right:auto}.hero-actions{justify-content:center}.hero-visual{width:100%}.footer-grid{grid-template-columns:repeat(2,1fr)}.feature-detail{grid-template-columns:1fr}.feature-detail:nth-child(even){direction:ltr}.sidebar-layout{grid-template-columns:1fr}.sidebar{position:static}.stats{grid-template-columns:repeat(2,1fr)}.testimonials{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.features-grid{grid-template-columns:1fr}.platforms{grid-template-columns:1fr}.download-cards{grid-template-columns:1fr}.tutorials-grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.hero h1{font-size:30px}.section-title{font-size:26px}.nav{gap:16px}.footer-grid{grid-template-columns:1fr}.testimonials{grid-template-columns:1fr}}