:root{--bg: #f2f9ff;--bg-soft: #ffffff;--bg-card: #ffffff;--text: #20304a;--text-muted: #5d6f8a;--primary: #3f8ff0;--primary-deep: #2f6fd8;--primary-soft: #e4f2ff;--accent: #46c6a3;--accent-soft: #e3f8f1;--grad: linear-gradient(135deg, #6ec6ff 0%, #8fd8c4 100%);--border: #e3eefb;--shadow: 0 10px 30px rgba(63, 143, 240, .12);--shadow-sm: 0 4px 16px rgba(63, 143, 240, .1);--radius: 18px;--radius-sm: 12px;--header-h: 66px;--maxw: 1180px}[data-theme=dark]{--bg: #0e1a2c;--bg-soft: #13233c;--bg-card: #172b49;--text: #e8f0fa;--text-muted: #a7bcd7;--primary: #6db4ff;--primary-deep: #8cc6ff;--primary-soft: #1d3a61;--accent: #5cd6b2;--accent-soft: #16394a;--grad: linear-gradient(135deg, #2b6cb0 0%, #1e5a70 100%);--border: #27405f;--shadow: 0 10px 30px rgba(0, 0, 0, .35);--shadow-sm: 0 4px 16px rgba(0, 0, 0, .3)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:16px;overflow-x:hidden;transition:background .35s ease,color .35s ease}img{max-width:100%;height:auto;display:block}a{color:var(--primary);text-decoration:none;transition:color .2s ease}a:hover{color:var(--primary-deep)}ul,ol{list-style:none}button{font-family:inherit;cursor:pointer}h1,h2,h3,h4{line-height:1.35;font-weight:700}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}.main-content{min-height:60vh;padding-top:var(--header-h)}.section{padding:64px 0}.section-head{text-align:center;max-width:720px;margin:0 auto 40px}.section-head h2{font-size:30px;margin-bottom:10px}.section-head p{color:var(--text-muted);font-size:16px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:999px;font-size:16px;font-weight:600;border:2px solid transparent;transition:all .25s ease;white-space:nowrap}.btn-primary{color:#fff;background:linear-gradient(135deg,#4a9df7,#35c2a6);box-shadow:0 8px 22px #3f8ff052}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px #3f8ff06b;color:#fff}.btn-ghost{color:var(--primary);background:var(--bg-soft);border-color:var(--primary)}.btn-ghost:hover{background:var(--primary-soft);transform:translateY(-2px)}.btn-lg{padding:16px 40px;font-size:17px}.site-header{position:fixed;top:0;left:0;right:0;z-index:999;height:var(--header-h);background:#ffffffdb;backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid transparent;transition:transform .3s ease,box-shadow .3s ease,background .35s ease}[data-theme=dark] .site-header{background:#0e1a2cdb}.site-header.is-scrolled{box-shadow:0 6px 20px #143c7814;border-bottom-color:var(--border)}.site-header.is-hidden{transform:translateY(-100%)}.header-inner{height:var(--header-h);display:flex;align-items:center;gap:26px}.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}.brand-badge{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;color:#fff;background:var(--grad);box-shadow:var(--shadow-sm)}.brand-text{display:flex;flex-direction:column;line-height:1.2}.brand-text strong{font-size:18px;color:var(--text)}.brand-text small{font-size:11px;color:var(--text-muted)}.desktop-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.desktop-nav a{padding:8px 13px;border-radius:10px;font-size:15px;color:var(--text);font-weight:500}.desktop-nav a:hover,.desktop-nav a.active{background:var(--primary-soft);color:var(--primary-deep)}.header-actions{display:flex;align-items:center;gap:8px}.theme-toggle{width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--bg-soft);color:var(--text);display:inline-flex;align-items:center;justify-content:center;transition:all .25s ease}.theme-toggle:hover{border-color:var(--primary);color:var(--primary);transform:rotate(20deg)}.menu-btn{display:none;width:40px;height:40px;border:1px solid var(--border);border-radius:12px;background:var(--bg-soft);flex-direction:column;align-items:center;justify-content:center;gap:4px}.menu-btn .bar{width:18px;height:2px;background:var(--text);border-radius:2px;transition:all .25s ease}.menu-btn .bar.open:nth-child(1){transform:translateY(6px) rotate(45deg)}.menu-btn .bar.open:nth-child(2){opacity:0}.menu-btn .bar.open:nth-child(3){transform:translateY(-6px) rotate(-45deg)}.mobile-menu{background:var(--bg-soft);border-top:1px solid var(--border);box-shadow:0 18px 30px #143c781a}.mobile-menu nav{max-width:var(--maxw);margin:0 auto;padding:12px 18px 18px;display:grid;gap:4px}.mobile-menu a{padding:12px 14px;border-radius:12px;font-size:16px;color:var(--text);font-weight:500}.mobile-menu a:hover,.mobile-menu a.active{background:var(--primary-soft);color:var(--primary-deep)}.menu-fade-enter-active,.menu-fade-leave-active{transition:opacity .22s ease,transform .22s ease}.menu-fade-enter-from,.menu-fade-leave-to{opacity:0;transform:translateY(-8px)}.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 15% 20%,rgba(110,198,255,.22),transparent 42%),radial-gradient(circle at 85% 15%,rgba(155,232,192,.28),transparent 45%),linear-gradient(180deg,#eaf7ff 0%,var(--bg) 100%);padding:72px 0 60px}.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:44px}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:14px;font-weight:600;margin-bottom:20px}.hero-badge:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}.hero-title{font-size:44px;margin-bottom:18px}.hero-title em{font-style:normal;background:linear-gradient(90deg,#3f8ff0,#35c2a6);-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{font-size:17px;color:var(--text-muted);margin-bottom:30px;max-width:540px}.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.hero-tips{margin-top:18px;font-size:14px;color:var(--text-muted)}.hero-media{position:relative}.hero-media img{width:100%;border-radius:26px;box-shadow:var(--shadow)}.hero-float{position:absolute;background:var(--bg-soft);border-radius:16px;padding:12px 16px;box-shadow:var(--shadow);font-size:14px;display:flex;align-items:center;gap:10px;border:1px solid var(--border)}.hero-float .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.hero-float.f1{top:8%;left:-24px}.hero-float.f2{bottom:10%;right:-18px}.stats{padding:26px 0}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.stat-card{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:24px 18px;text-align:center;box-shadow:var(--shadow-sm)}.stat-num{font-size:36px;font-weight:800;background:linear-gradient(135deg,#3f8ff0,#35c2a6);-webkit-background-clip:text;background-clip:text;color:transparent}.stat-label{color:var(--text-muted);font-size:14px;margin-top:4px}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.feature-card{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:transform .25s ease,box-shadow .25s ease}.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}.feature-icon{width:52px;height:52px;border-radius:15px;display:inline-flex;align-items:center;justify-content:center;color:#fff;background:var(--grad);margin-bottom:16px}.feature-card h3{font-size:19px;margin-bottom:8px}.feature-card p{color:var(--text-muted);font-size:15px}.advantage{background:var(--bg-soft)}.advantage-grid{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:44px}.advantage-media img{width:100%;border-radius:24px;box-shadow:var(--shadow)}.advantage-text h2{font-size:30px;margin-bottom:18px}.advantage-text p{color:var(--text-muted);margin-bottom:16px}.adv-list{display:grid;gap:14px;margin-top:22px}.adv-list li{display:flex;gap:12px;align-items:flex-start}.adv-list .ok{width:24px;height:24px;border-radius:50%;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:700}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.step-card{position:relative;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px 26px;text-align:center}.step-num{width:46px;height:46px;margin:0 auto 14px;border-radius:50%;color:#fff;font-size:20px;font-weight:800;background:var(--grad);display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}.step-card h3{font-size:19px;margin-bottom:8px}.step-card p{color:var(--text-muted);font-size:15px}.cta-banner{margin:20px 0 70px;border-radius:28px;padding:52px 34px;text-align:center;color:#fff;background:radial-gradient(circle at 20% 30%,rgba(255,255,255,.18),transparent 40%),linear-gradient(135deg,#4a9df7,#35c2a6);box-shadow:0 18px 40px #3f8ff052}.cta-banner h2{font-size:32px;margin-bottom:12px;color:#fff}.cta-banner p{font-size:16px;opacity:.95;margin-bottom:26px}.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}.btn-white{background:#fff;color:#2f6fd8;box-shadow:0 8px 22px #00000026}.btn-white:hover{transform:translateY(-2px);color:#2f6fd8}.btn-line{border-color:#ffffffd9;color:#fff}.btn-line:hover{background:#ffffff29;color:#fff}.page-hero{padding:46px 0 34px;background:radial-gradient(circle at 12% 30%,rgba(110,198,255,.2),transparent 40%),radial-gradient(circle at 88% 20%,rgba(155,232,192,.24),transparent 44%),linear-gradient(180deg,#e9f6ff 0%,var(--bg) 100%)}.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:18px;color:var(--text-muted);flex-wrap:wrap}.breadcrumb .sep{color:var(--text-muted)}.breadcrumb .current{color:var(--primary);font-weight:600}.page-hero-title{font-size:36px;margin-bottom:14px}.page-hero-sub{font-size:17px;color:var(--text-muted);max-width:820px}.page-hero-img{margin-top:26px}.page-hero-img img{width:100%;border-radius:22px;box-shadow:var(--shadow);max-height:460px;object-fit:cover}.article{background:var(--bg-soft);border:1px solid var(--border);border-radius:22px;padding:36px 40px;box-shadow:var(--shadow-sm)}.article h2{font-size:24px;margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--primary)}.article h3{font-size:19px;margin:24px 0 10px}.article p{margin-bottom:14px;color:var(--text-muted)}.article ul,.article ol{margin:0 0 16px 22px}.article li{margin-bottom:8px;color:var(--text-muted);position:relative;padding-left:6px}.article ul li:before{content:"";position:absolute;left:-16px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--accent)}.article strong{color:var(--text)}.article-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:22px 0}.article-img{border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm)}.article-img img{width:100%}.article-note{background:var(--primary-soft);border-radius:14px;padding:16px 20px;margin:20px 0;font-size:15px;color:var(--text)}.article-note b{color:var(--primary-deep)}.faq-list{display:grid;gap:14px;max-width:860px;margin:0 auto}.faq-item{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 20px;transition:box-shadow .2s ease}.faq-item[open]{box-shadow:var(--shadow-sm)}.faq-item summary{cursor:pointer;padding:15px 0;font-weight:600;font-size:16px;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";font-size:22px;color:var(--primary);transition:transform .2s ease;flex-shrink:0}.faq-item[open] summary:after{transform:rotate(45deg)}.faq-item p{color:var(--text-muted);padding:0 0 16px;font-size:15px}.seo-keywords{padding:26px 0 34px}.seo-keywords p{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.seo-keywords a{font-size:13px;color:var(--text-muted);background:var(--bg-soft);border:1px solid var(--border);padding:6px 14px;border-radius:999px;transition:all .2s ease}.seo-keywords a:hover{color:var(--primary);border-color:var(--primary)}.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.rel-card{display:block;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .25s ease,box-shadow .25s ease}.rel-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.rel-card h3{font-size:18px;color:var(--text);margin-bottom:8px}.rel-card p{font-size:14px;color:var(--text-muted);margin-bottom:12px}.rel-more{font-size:14px;color:var(--primary);font-weight:600}.site-footer{background:var(--bg-soft);border-top:1px solid var(--border);margin-top:20px}.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;padding-top:46px;padding-bottom:34px}.footer-col h3{font-size:17px;margin-bottom:14px}.footer-brand p{font-size:14px;color:var(--text-muted);max-width:320px}.footer-col ul{display:grid;gap:8px}.footer-col ul li{font-size:14px;color:var(--text-muted)}.footer-col ul a{color:var(--text-muted)}.footer-col ul a:hover{color:var(--primary)}.footer-bottom{border-top:1px solid var(--border);padding:20px 22px;text-align:center}.footer-bottom p{font-size:13px;color:var(--text-muted)}@media (max-width: 1080px){.desktop-nav a{padding:8px 9px;font-size:14px}.hero-title{font-size:38px}}@media (max-width: 900px){.desktop-nav{display:none}.menu-btn{display:inline-flex}.hero-inner{grid-template-columns:1fr;gap:30px}.hero-title{font-size:34px}.hero-float.f1{left:0}.hero-float.f2{right:0}.features-grid{grid-template-columns:repeat(2,1fr)}.steps-grid,.advantage-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.article-grid{grid-template-columns:1fr}.rel-grid{grid-template-columns:repeat(2,1fr)}.footer-inner{grid-template-columns:1fr 1fr}.section{padding:48px 0}}@media (max-width: 600px){:root{--header-h: 60px}body{font-size:15px}.container{padding:0 16px}.hero{padding:52px 0 46px}.hero-title{font-size:29px}.hero-sub{font-size:16px}.section-head h2{font-size:25px}.features-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.rel-grid{grid-template-columns:1fr}.page-hero-title{font-size:28px}.article{padding:26px 20px}.cta-banner{padding:38px 20px}.cta-banner h2{font-size:25px}.footer-inner{grid-template-columns:1fr;gap:22px}.btn-lg{padding:14px 30px;font-size:16px}}
