:root{--brand:#1a6fb5;--brand-2:#2fa8e0;--brand-3:#7c5cff;--accent:#f5a623;--ink:#1f2a36;--muted:#5b6b7b;--bg:#f6f9fc;--card:#ffffff;--line:#e2eaf2;--glass:rgba(255,255,255,.72);--glass-line:rgba(255,255,255,.55);--shadow:0 10px 30px rgba(26,111,181,.10);--shadow-hover:0 18px 44px rgba(26,111,181,.20);--radius:16px;--radius-sm:12px;--radius-lg:22px;--grad:linear-gradient(135deg,#1a6fb5 0%,#2fa8e0 45%,#7c5cff 100%);--grad-soft:linear-gradient(135deg,rgba(26,111,181,.10),rgba(124,92,255,.10))}
body.dark{--ink:#e8eef5;--muted:#9fb0c0;--bg:#0f1720;--card:#16202b;--line:#243240;--glass:rgba(22,32,43,.72);--glass-line:rgba(255,255,255,.08);--shadow:0 10px 30px rgba(0,0,0,.35);--shadow-hover:0 18px 44px rgba(0,0,0,.5)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;transition:background .35s ease,color .35s ease;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(1200px 600px at 10% -10%,rgba(47,168,224,.16),transparent 60%),radial-gradient(900px 500px at 100% 0,rgba(124,92,255,.14),transparent 55%),radial-gradient(800px 600px at 50% 110%,rgba(245,166,35,.10),transparent 60%);pointer-events:none}
body.dark::before{background:radial-gradient(1200px 600px at 10% -10%,rgba(47,168,224,.14),transparent 60%),radial-gradient(900px 500px at 100% 0,rgba(124,92,255,.16),transparent 55%),radial-gradient(800px 600px at 50% 110%,rgba(245,166,35,.06),transparent 60%)}
a{color:var(--brand);text-decoration:none;transition:color .25s ease,opacity .25s ease}
a:hover{color:var(--brand-2);text-decoration:underline}
img,svg{max-width:100%;display:block}
::selection{background:rgba(47,168,224,.28)}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;border-radius:6px}
header.site{position:sticky;top:0;z-index:100;background:var(--glass);backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--glass-line);box-shadow:0 2px 14px rgba(0,0,0,.05);transition:background .35s ease,border-color .35s ease}
.header-inner{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--brand);letter-spacing:.2px;transition:transform .3s ease}
.logo:hover{text-decoration:none;transform:translateY(-1px)}
.logo svg{width:38px;height:38px;border-radius:12px;box-shadow:0 6px 18px rgba(26,111,181,.28);transition:transform .4s cubic-bezier(.2,.8,.2,1)}
.logo:hover svg{transform:rotate(-6deg) scale(1.05)}
nav.main{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}
nav.main a{color:var(--ink);font-size:15px;padding:7px 12px;border-radius:10px;position:relative;transition:color .25s ease,background .25s ease,transform .25s ease}
nav.main a::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .3s cubic-bezier(.2,.8,.2,1)}
nav.main a:hover{color:var(--brand);background:rgba(26,111,181,.08);text-decoration:none;transform:translateY(-1px)}
nav.main a:hover::after{transform:scaleX(1)}
.header-tools{display:flex;gap:10px;align-items:center}
.search-box{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:var(--card);transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease}
.search-box:focus-within{border-color:var(--brand-2);box-shadow:0 0 0 4px rgba(47,168,224,.16);transform:translateY(-1px)}
.search-box input{border:0;background:transparent;padding:7px 14px;outline:none;width:150px;color:var(--ink);font-size:14px}
.search-box input::placeholder{color:var(--muted)}
.search-box button{border:0;background:var(--grad);color:#fff;padding:7px 16px;cursor:pointer;font-size:14px;transition:filter .25s ease,transform .25s ease}
.search-box button:hover{filter:brightness(1.08)}
.search-box button:active{transform:scale(.97)}
.theme-toggle,.menu-toggle{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;padding:7px 11px;cursor:pointer;font-size:14px;line-height:1;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,background .25s ease}
.theme-toggle:hover,.menu-toggle:hover{transform:translateY(-2px) rotate(-4deg);box-shadow:var(--shadow);border-color:var(--brand-2)}
.menu-toggle{display:none}
.breadcrumb{max-width:1200px;margin:0 auto;padding:14px 20px;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--muted);padding:2px 4px;border-radius:6px;transition:color .25s ease,background .25s ease}
.breadcrumb a:hover{color:var(--brand);background:rgba(26,111,181,.08);text-decoration:none}
main{max-width:1200px;margin:0 auto;padding:0 20px 60px}
section{margin:56px 0;scroll-margin-top:90px}
h1{font-size:30px;line-height:1.4;margin-bottom:16px;letter-spacing:.2px}
h2{font-size:24px;margin:38px 0 16px;padding-left:14px;border-left:4px solid transparent;border-image:var(--grad) 1;letter-spacing:.2px}
h3{font-size:19px;margin:24px 0 10px;color:var(--brand)}
h4{font-size:16px;margin:16px 0 8px;color:var(--muted)}
p{margin:10px 0;color:var(--ink)}
.lead{font-size:17px;color:var(--muted);line-height:1.85}
.banner{position:relative;border-radius:var(--radius-lg);overflow:hidden;background:var(--grad);color:#fff;min-height:300px;display:flex;align-items:center;padding:44px;box-shadow:0 20px 50px rgba(26,111,181,.28);isolation:isolate}
.banner::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 20%,rgba(255,255,255,.22),transparent 60%),radial-gradient(500px 260px at 10% 90%,rgba(255,255,255,.14),transparent 60%);z-index:-1;pointer-events:none}
.banner::after{content:"";position:absolute;top:-40%;right:-10%;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 65%);animation:floatOrb 9s ease-in-out infinite;pointer-events:none}
@keyframes floatOrb{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(-24px,26px,0) scale(1.08)}}
.banner .slide{display:none;animation:fadeSlide .6s ease both}
.banner .slide.active{display:block}
@keyframes fadeSlide{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.banner h2{border:0;color:#fff;padding:0;margin:0 0 12px;font-size:27px;letter-spacing:.3px;text-shadow:0 2px 12px rgba(0,0,0,.12)}
.banner p{color:rgba(255,255,255,.94);max-width:660px;font-size:16px}
.banner-dots{position:absolute;bottom:18px;right:26px;display:flex;gap:9px}
.banner-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:transform .3s ease,background .3s ease,width .3s ease}
.banner-dots span:hover{transform:scale(1.25);background:rgba(255,255,255,.8)}
.banner-dots span.active{background:#fff;width:26px;border-radius:999px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-top:26px}
.stat{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s ease,border-color .35s ease}
.stat:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--brand-2)}
.stat .num{font-size:30px;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2}
.stat .label{font-size:14px;color:var(--muted);margin-top:4px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{position:relative;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);overflow:hidden;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s ease,border-color .35s ease}
.card::before{content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:opacity .35s ease;pointer-events:none}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:var(--brand-2)}
.card:hover::before{opacity:1}
.card h3{margin-top:0;position:relative}
.card svg{width:46px;height:46px;margin-bottom:14px;border-radius:12px;transition:transform .4s cubic-bezier(.2,.8,.2,1)}
.card:hover svg{transform:translateY(-3px) scale(1.06) rotate(-3deg)}
.card p{position:relative;color:var(--muted);font-size:15px}
.tag{display:inline-block;font-size:12px;color:var(--brand);background:rgba(26,111,181,.10);border:1px solid rgba(26,111,181,.18);border-radius:999px;padding:2px 10px;margin-right:6px;transition:background .25s ease,transform .25s ease}
.tag:hover{background:rgba(26,111,181,.18);transform:translateY(-1px)}
ul.list{padding-left:22px}
ul.list li{margin:7px 0;color:var(--ink);transition:transform .25s ease,color .25s ease}
ul.list li::marker{color:var(--brand-2)}
ul.list li:hover{transform:translateX(4px);color:var(--brand)}
.case{position:relative;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s ease,border-color .35s ease}
.case:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:var(--brand-2)}
.case h3{margin-top:0}
.case .meta{font-size:13px;color:var(--muted);margin-bottom:8px}
blockquote{position:relative;border-left:3px solid var(--accent);background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);padding:16px 20px;border-radius:var(--radius-sm);color:var(--muted);margin:16px 0;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
blockquote:hover{transform:translateX(6px);box-shadow:var(--shadow-hover)}
.article-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.article{position:relative;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;box-shadow:var(--shadow);overflow:hidden;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s ease,border-color .35s ease}
.article::after{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);transform:scaleY(0);transform-origin:top;transition:transform .35s ease}
.article:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover);border-color:var(--brand-2)}
.article:hover::after{transform:scaleY(1)}
.article h3{margin:0 0 8px;font-size:17px;transition:color .25s ease}
.article:hover h3{color:var(--brand-2)}
.article .date{font-size:12px;color:var(--muted);margin-bottom:6px}
.article p{font-size:14px;color:var(--muted);flex:1}
.article a.more{margin-top:12px;font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:4px;transition:gap .25s ease,color .25s ease}
.article a.more:hover{gap:9px;text-decoration:none}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);margin:10px 0;background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:var(--shadow);overflow:hidden;transition:border-color .3s ease,box-shadow .3s ease,transform .3s ease}
.faq-item:hover{border-color:var(--brand-2);box-shadow:var(--shadow-hover)}
.faq-item.open{border-color:var(--brand-2)}
.faq-q{padding:15px 18px;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;gap:10px;align-items:center;transition:background .25s ease,color .25s ease}
.faq-q:hover{background:rgba(26,111,181,.06);color:var(--brand)}
.faq-q span{flex:0 0 auto;width:24px;height:24px;line-height:22px;text-align:center;border-radius:50%;background:rgba(26,111,181,.10);color:var(--brand);font-weight:700;transition:transform .35s cubic-bezier(.2,.8,.2,1),background .3s ease,color .3s ease}
.faq-item.open .faq-q span{transform:rotate(135deg);background:var(--grad);color:#fff}
.faq-a{padding:0 18px 16px;color:var(--muted);display:none;animation:fadeSlide .35s ease both}
.faq-item.open .faq-a{display:block}
.howto-step{position:relative;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-left:4px solid var(--brand-2);border-radius:var(--radius-sm);padding:18px 22px;margin:14px 0;box-shadow:var(--shadow);transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s ease,border-color .35s ease}
.howto-step:hover{transform:translateX(8px);box-shadow:var(--shadow-hover);border-left-color:var(--brand-3)}
.howto-step h3{margin-top:0}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.2,.8,.2,1),transform .7s cubic-bezier(.2,.8,.2,1)}
.reveal.visible{opacity:1;transform:none}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
footer.site{position:relative;background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--glass-line);padding:40px 20px 22px;margin-top:48px}
footer.site::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.footer-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:26px}
footer.site h4{color:var(--ink);font-size:15px;margin-bottom:12px;position:relative;padding-left:12px}
footer.site h4::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:14px;border-radius:2px;background:var(--grad)}
footer.site a{color:var(--muted);font-size:14px;display:block;margin:6px 0;transition:color .25s ease,transform .25s ease,padding-left .25s ease}
footer.site a:hover{color:var(--brand);transform:translateX(4px);text-decoration:none}
.copy{max-width:1200px;margin:28px auto 0;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);text-align:center}
.copy p{margin:6px 0;color:var(--muted)}
#backTop{position:fixed;right:20px;bottom:24px;background:var(--grad);color:#fff;border:0;border-radius:50%;width:46px;height:46px;cursor:pointer;display:none;font-size:18px;z-index:99;box-shadow:0 10px 26px rgba(26,111,181,.36);transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s ease,filter .3s ease}
#backTop:hover{transform:translateY(-4px) scale(1.06);box-shadow:0 16px 34px rgba(26,111,181,.5);filter:brightness(1.08)}
#backTop:active{transform:scale(.95)}
@media(max-width:960px){
.header-inner{gap:14px}
nav.main a{padding:6px 10px;font-size:14px}
.search-box input{width:120px}
h1{font-size:26px}
.banner{padding:34px;min-height:260px}
.banner h2{font-size:23px}
}
@media(max-width:820px){
nav.main{display:none;width:100%;flex-direction:column;gap:2px;margin:10px 0 4px;padding:8px;border-radius:var(--radius-sm);background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}
nav.main.open{display:flex;animation:fadeSlide .35s ease both}
nav.main a{padding:10px 12px}
nav.main a::after{display:none}
.menu-toggle{display:block;order:2}
.logo{order:1}
.header-tools{order:3;margin-left:auto}
.search-box input{width:110px}
h1{font-size:23px}
h2{font-size:20px}
.banner{padding:26px 22px;min-height:240px;border-radius:var(--radius)}
.banner h2{font-size:20px}
.banner p{font-size:15px}
.banner-dots{bottom:12px;right:16px}
section{margin:40px 0}
}
@media(max-width:520px){
body{font-size:15px}
.header-inner{padding:10px 14px;gap:10px}
.logo{font-size:17px}
.logo svg{width:32px;height:32px}
.search-box{display:none}
main{padding:0 14px 48px}
.banner{padding:22px 18px;min-height:220px}
.banner h2{font-size:18px}
.banner p{font-size:14px}
.stats{grid-template-columns:repeat(2,1fr);gap:12px}
.stat{padding:16px}
.stat .num{font-size:24px}
.grid,.article-list,.contact-grid{grid-template-columns:1fr}
.card,.case,.article,.howto-step{padding:18px}
blockquote{padding:14px 16px}
#backTop{right:14px;bottom:18px;width:42px;height:42px}
}
@media(prefers-reduced-motion:reduce){
*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
.reveal{opacity:1;transform:none}
}
@media print{
header.site,footer.site,#backTop,.banner-dots{display:none!important}
body{background:#fff;color:#000}
.card,.case,.article,.faq-item,blockquote,.howto-step{box-shadow:none;border:1px solid #ccc;background:#fff}
}