/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:Inter,"Inter Fallback","PingFang SC","Hiragino Sans GB","Microsoft YaHei",微软雅黑,"Noto Sans SC","Source Han Sans SC","WenQuanYi Micro Hei",ui-sans-serif,system-ui,sans-serif;color:#333;line-height:1.5;background:#fff}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}

/* ===== CSS Variables ===== */
:root{
  --primary:#2563eb;
  --primary-dark:#1e40af;
  --primary-light:#3b82f6;
  --accent:#06b6d4;
  --dark:#0f172a;
  --dark-soft:#1e293b;
  --gray-50:#f8fafc;
  --gray-100:#f1f5f9;
  --gray-200:#e2e8f0;
  --gray-300:#cbd5e1;
  --gray-400:#94a3b8;
  --gray-500:#64748b;
  --gray-600:#475569;
  --gray-700:#334155;
  --gray-800:#1e293b;
  --danger:#ef4444;
  --warning:#f59e0b;
  --success:#10b981;
  --radius:8px;
  --radius-lg:12px;
  --shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05);
  --shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 10px 10px -5px rgba(0,0,0,.04);
  --max-width:1200px;
  --nav-height:64px;
}

/* ===== Layout ===== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-alt{background:var(--gray-50)}

/* ===== Typography ===== */
h1{font-size:2.75rem;font-weight:800;line-height:1.2;letter-spacing:-.02em}
h2{font-size:2rem;font-weight:700;line-height:1.3}
h3{font-size:1.5rem;font-weight:600;line-height:1.4}
h4{font-size:1.125rem;font-weight:600}
.text-center{text-align:center}
.text-muted{color:var(--gray-500)}
.section-title{text-align:center;margin-bottom:16px}
.section-subtitle{text-align:center;color:var(--gray-500);max-width:640px;margin:0 auto 48px;font-size:1.125rem}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;border:none;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-white{background:#fff;color:var(--dark)}
.btn-white:hover{background:var(--gray-100);transform:translateY(-1px)}
.btn-sm{padding:8px 20px;font-size:.875rem}
.btn-lg{padding:16px 36px;font-size:1.125rem}

/* ===== Navigation ===== */
.navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200);z-index:1000;transition:box-shadow .3s}
.navbar.scrolled{box-shadow:var(--shadow)}
.navbar .container{display:flex;align-items:center;height:100%;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:8px;font-size:1.5rem;font-weight:800;color:var(--primary)}
.nav-logo .logo-icon{width:32px;height:32px;background:var(--primary);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:.875rem}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:.9375rem;font-weight:500;color:var(--gray-600);transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--gray-700);padding:4px}

/* ===== Hero ===== */
.hero{padding:calc(var(--nav-height) + 80px) 0 80px;background:linear-gradient(135deg,#eff6ff 0%,#dbeafe 50%,#e0f2fe 100%);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(37,99,235,.08) 0%,transparent 70%);border-radius:50%}
.hero .container{display:flex;align-items:center;gap:64px}
.hero-content{flex:1;min-width:0}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(37,99,235,.1);color:var(--primary);padding:6px 16px;border-radius:20px;font-size:.875rem;font-weight:600;margin-bottom:24px}
.hero h1{margin-bottom:20px;color:var(--dark)}
.hero h1 span{color:var(--primary)}
.hero-desc{font-size:1.25rem;color:var(--gray-600);margin-bottom:36px;max-width:540px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-visual{flex:0 0 480px;position:relative}
.hero-dashboard{background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);padding:24px;border:1px solid var(--gray-200)}
.hero-dashboard .dash-header{display:flex;align-items:center;gap:12px;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--gray-100)}
.hero-dashboard .dash-dot{width:10px;height:10px;border-radius:50%}
.hero-dashboard .dash-title{font-size:.875rem;color:var(--gray-500);margin-left:auto}
.hero-dashboard .dash-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:16px}
.dash-stat{background:var(--gray-50);border-radius:var(--radius);padding:12px;text-align:center}
.dash-stat .num{font-size:1.5rem;font-weight:700}
.dash-stat .label{font-size:.75rem;color:var(--gray-500)}
.dash-stat.critical .num{color:var(--danger)}
.dash-stat.warning .num{color:var(--warning)}
.dash-stat.ok .num{color:var(--success)}
.dash-timeline{display:flex;flex-direction:column;gap:8px}
.dash-timeline-item{display:flex;align-items:center;gap:10px;padding:8px 12px;background:var(--gray-50);border-radius:6px;font-size:.8125rem}
.dash-timeline-item .dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.dash-timeline-item .time{color:var(--gray-400);margin-left:auto;font-size:.75rem}

/* ===== Features ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:32px;transition:all .3s}
.feature-card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.feature-icon{width:48px;height:48px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:1.5rem}
.feature-icon.blue{background:rgba(37,99,235,.1);color:var(--primary)}
.feature-icon.cyan{background:rgba(6,182,212,.1);color:var(--accent)}
.feature-icon.green{background:rgba(16,185,129,.1);color:var(--success)}
.feature-icon.orange{background:rgba(245,158,11,.1);color:var(--warning)}
.feature-icon.red{background:rgba(239,68,68,.1);color:var(--danger)}
.feature-icon.purple{background:rgba(139,92,246,.1);color:#8b5cf6}
.feature-card h3{margin-bottom:12px;font-size:1.25rem}
.feature-card p{color:var(--gray-500);font-size:.9375rem;line-height:1.7}

/* ===== How It Works ===== */
.steps{display:flex;gap:32px;position:relative}
.steps::before{content:'';position:absolute;top:36px;left:36px;right:36px;height:2px;background:var(--gray-200)}
.step{flex:1;text-align:center;position:relative}
.step-num{width:72px;height:72px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 20px;position:relative;z-index:1}
.step h4{margin-bottom:8px}
.step p{color:var(--gray-500);font-size:.9375rem}

/* ===== Pricing ===== */
.pricing-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;align-items:start}
.pricing-card{background:#fff;border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:32px;text-align:center;transition:all .3s}
.pricing-card.featured{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary);position:relative}
.pricing-card.featured::before{content:'推荐';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--primary);color:#fff;padding:4px 16px;border-radius:12px;font-size:.75rem;font-weight:600}
.pricing-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.pricing-name{font-size:1.125rem;font-weight:600;margin-bottom:8px}
.pricing-price{font-size:2.5rem;font-weight:800;color:var(--dark);margin-bottom:4px}
.pricing-price span{font-size:.875rem;font-weight:400;color:var(--gray-500)}
.pricing-desc{color:var(--gray-500);font-size:.875rem;margin-bottom:24px;min-height:40px}
.pricing-features{text-align:left;margin-bottom:28px}
.pricing-features li{padding:8px 0;font-size:.875rem;display:flex;align-items:center;gap:8px}
.pricing-features li::before{content:'✓';color:var(--success);font-weight:700;flex-shrink:0}
.pricing-features li.disabled{color:var(--gray-400)}
.pricing-features li.disabled::before{content:'—';color:var(--gray-300)}
.pricing-divider{height:1px;background:var(--gray-200);margin-bottom:24px}

/* ===== CTA ===== */
.cta{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;text-align:center;padding:80px 0}
.cta h2{color:#fff;margin-bottom:16px}
.cta p{color:rgba(255,255,255,.8);font-size:1.125rem;margin-bottom:32px}

/* ===== Footer ===== */
.footer{background:var(--dark);color:var(--gray-400);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand p{margin-top:12px;font-size:.875rem;line-height:1.7}
.footer-col h4{color:#fff;margin-bottom:16px;font-size:.9375rem}
.footer-col a{display:block;padding:4px 0;font-size:.875rem;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--gray-800);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:.8125rem}
.footer-beian{text-align:center;padding-top:16px;font-size:.75rem;color:var(--gray-500)}
.footer-beian a{color:var(--gray-500);transition:color .2s}
.footer-beian a:hover{color:#fff}
.footer-beian-sep{margin:0 8px}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .pricing-grid{grid-template-columns:repeat(2,1fr)}
  .hero .container{flex-direction:column}
  .hero-visual{flex:none;width:100%;max-width:480px}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  h1{font-size:2rem}
  h2{font-size:1.5rem}
  .section{padding:48px 0}
  .nav-links{display:none}
  .nav-toggle{display:block}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:var(--nav-height);left:0;right:0;background:#fff;padding:16px 24px;border-bottom:1px solid var(--gray-200);box-shadow:var(--shadow)}
  .features-grid{grid-template-columns:1fr}
  .pricing-grid{grid-template-columns:1fr}
  .steps{flex-direction:column}
  .steps::before{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}

/* ===== Documentation Layout ===== */
.docs-layout{display:flex;min-height:calc(100vh - var(--nav-height));padding-top:var(--nav-height)}
.docs-sidebar{width:260px;flex-shrink:0;background:var(--gray-50);border-right:1px solid var(--gray-200);padding:24px 0;position:sticky;top:var(--nav-height);height:calc(100vh - var(--nav-height));overflow-y:auto}
.docs-sidebar-section{margin-bottom:8px}
.docs-sidebar-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--gray-400);padding:8px 24px}
.docs-sidebar a{display:block;padding:8px 24px;font-size:.875rem;color:var(--gray-600);transition:all .15s;border-left:2px solid transparent}
.docs-sidebar a:hover{color:var(--primary);background:rgba(37,99,235,.04)}
.docs-sidebar a.active{color:var(--primary);background:rgba(37,99,235,.08);border-left-color:var(--primary);font-weight:600}
.docs-content{flex:1;min-width:0;padding:40px 56px;max-width:860px}
.docs-content h1{margin-bottom:8px;font-size:2rem}
.docs-content .doc-meta{color:var(--gray-500);font-size:.875rem;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--gray-200)}
.docs-content h2{margin-top:40px;margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid var(--gray-100)}
.docs-content h3{margin-top:32px;margin-bottom:12px}
.docs-content p{margin-bottom:16px;line-height:1.8}
.docs-content ul,.docs-content ol{margin-bottom:16px;padding-left:24px}
.docs-content ul{list-style:disc}
.docs-content ol{list-style:decimal}
.docs-content li{margin-bottom:8px;line-height:1.7}
.docs-content code{background:var(--gray-100);padding:2px 6px;border-radius:4px;font-size:.875rem;font-family:"SF Mono","Fira Code",monospace}
.docs-content pre{background:var(--dark);color:#e2e8f0;padding:20px;border-radius:var(--radius);margin-bottom:20px;overflow-x:auto;font-size:.875rem;line-height:1.6}
.docs-content pre code{background:none;padding:0;color:inherit}
.docs-content blockquote{border-left:4px solid var(--primary);background:var(--gray-50);padding:16px 20px;margin-bottom:20px;border-radius:0 var(--radius) var(--radius) 0}
.docs-content blockquote p{margin-bottom:0;color:var(--gray-600)}
.docs-content table{width:100%;border-collapse:collapse;margin-bottom:20px;font-size:.875rem}
.docs-content th{background:var(--gray-50);text-align:left;padding:12px 16px;border:1px solid var(--gray-200);font-weight:600}
.docs-content td{padding:12px 16px;border:1px solid var(--gray-200)}
.docs-content img{border-radius:var(--radius);border:1px solid var(--gray-200);margin:16px 0}
.docs-image{margin:16px 0;padding:8px;background:var(--gray-50);border-radius:var(--radius);border:1px solid var(--gray-200)}
.docs-image img{margin:0;border:none;max-width:100%;height:auto}

.docs-tip{background:#eff6ff;border:1px solid #bfdbfe;border-radius:var(--radius);padding:16px 20px;margin-bottom:20px}
.docs-tip::before{content:'💡 提示';display:block;font-weight:600;color:var(--primary);margin-bottom:4px;font-size:.875rem}
.docs-tip p{margin-bottom:0;font-size:.9375rem}
.docs-warn{background:#fffbeb;border:1px solid #fde68a;border-radius:var(--radius);padding:16px 20px;margin-bottom:20px}
.docs-warn::before{content:'⚠️ 注意';display:block;font-weight:600;color:#d97706;margin-bottom:4px;font-size:.875rem}
.docs-warn p{margin-bottom:0;font-size:.9375rem}

.doc-nav{display:flex;justify-content:space-between;margin-top:48px;padding-top:24px;border-top:1px solid var(--gray-200)}
.doc-nav a{display:flex;align-items:center;gap:8px;color:var(--primary);font-weight:600;font-size:.9375rem}
.doc-nav a:hover{text-decoration:underline}

@media(max-width:768px){
  .docs-sidebar{display:none}
  .docs-content{padding:24px 16px}
}