:root{--brand:#ff5a36;--brand-2:#ffb347;--brand-3:#ff8a5c;--ink:#1f2329;--muted:#5c6470;--bg:#ffffff;--bg-2:#fff7f3;--bg-3:#fff0e8;--line:#f0e3dc;--glass:rgba(255,255,255,.72);--glass-line:rgba(255,255,255,.55);--radius:14px;--radius-lg:22px;--shadow:0 10px 30px rgba(255,90,54,.12);--shadow-lg:0 24px 60px rgba(255,90,54,.18);--max:1180px;--ease:cubic-bezier(.22,.61,.36,1)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .25s var(--ease)}
a:hover{text-decoration:underline}
::selection{background:rgba(255,90,54,.18);color:var(--ink)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.topbar{background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#fff;font-size:13px;padding:6px 0}
.topbar .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.topbar a{color:#fff;text-decoration:underline}
header.site{position:sticky;top:0;z-index:100;background:var(--glass);-webkit-backdrop-filter:blur(14px) saturate(160%);backdrop-filter:blur(14px) saturate(160%);border-bottom:1px solid var(--line);transition:background .3s var(--ease),border-color .3s var(--ease)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink);letter-spacing:.2px}
.logo svg{width:34px;height:34px;transition:transform .45s var(--ease)}
.logo:hover{text-decoration:none}
.logo:hover svg{transform:rotate(-8deg) scale(1.06)}
nav.main ul{display:flex;gap:22px;list-style:none;font-size:15px}
nav.main a{color:var(--ink);position:relative;padding:4px 0}
nav.main a:hover{color:var(--brand);text-decoration:none}
nav.main a:after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .3s var(--ease)}
nav.main a:hover:after{width:100%}
.nav-actions{display:flex;align-items:center;gap:10px}
.search-box{display:flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:4px 6px 4px 14px;background:var(--bg-2);transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,90,54,.12)}
.search-box input{border:0;background:transparent;outline:none;width:130px;font-size:14px;color:var(--ink);font-family:inherit}
.search-box input::placeholder{color:#a8aeb8}
.search-box button{border:0;background:var(--brand);color:#fff;border-radius:999px;padding:6px 14px;cursor:pointer;font-size:13px;font-family:inherit;transition:background .25s var(--ease),transform .25s var(--ease)}
.search-box button:hover{background:#e94a28;transform:translateY(-1px)}
.icon-btn{border:1px solid var(--line);background:#fff;border-radius:999px;width:38px;height:38px;display:grid;place-items:center;cursor:pointer;font-size:16px;color:var(--ink);transition:transform .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease)}
.icon-btn:hover{transform:rotate(-15deg) scale(1.05);border-color:var(--brand);color:var(--brand)}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;width:40px;height:40px;cursor:pointer;color:var(--ink);font-size:18px}
.hero{position:relative;background:linear-gradient(135deg,#fff7f3 0%,#ffe9df 45%,#ffe0d2 100%);padding:56px 0 64px;overflow:hidden}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(60px);pointer-events:none;z-index:0}
.hero:before{width:420px;height:420px;background:rgba(255,90,54,.22);top:-140px;right:-100px}
.hero:after{width:360px;height:360px;background:rgba(255,179,71,.3);bottom:-160px;left:-80px}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(26px,4vw,44px);line-height:1.25;letter-spacing:.5px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(90deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:17px;color:var(--muted);margin-bottom:24px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),color .3s var(--ease)}
.btn:active{transform:scale(.97)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:linear-gradient(135deg,#e94a28,#ff7a4a);box-shadow:var(--shadow-lg);transform:translateY(-2px);text-decoration:none}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--bg-2);transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none}
.hero-art{position:relative;display:grid;place-items:center}
.hero-art svg{width:100%;max-width:380px;filter:drop-shadow(0 20px 40px rgba(255,90,54,.25));animation:floatY 6s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.carousel{position:relative;margin-top:34px;background:var(--glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--glass-line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.carousel-track{display:flex;transition:transform .55s var(--ease)}
.slide{min-width:100%;padding:26px 30px;display:flex;gap:20px;align-items:center}
.slide .dot{width:10px;height:10px;border-radius:50%;background:var(--brand);flex:none;box-shadow:0 0 0 4px rgba(255,90,54,.15)}
.slide h3{font-size:18px;margin-bottom:6px}
.slide p{color:var(--muted);font-size:14px}
.carousel-dots{display:flex;gap:8px;justify-content:center;padding:0 0 16px}
.carousel-dots button{width:9px;height:9px;border-radius:50%;border:0;background:#e6cfc6;cursor:pointer;padding:0;transition:width .3s var(--ease),background .3s var(--ease)}
.carousel-dots button.active{background:var(--brand);width:22px;border-radius:999px}
section{padding:64px 0;position:relative}
section.alt{background:var(--bg-2)}
.section-head{max-width:780px;margin-bottom:36px}
.section-head .kicker{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);background:var(--glass);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);padding:4px 12px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.3;margin-bottom:12px;letter-spacing:.2px}
.section-head p{color:var(--muted)}
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);position:relative;overflow:hidden}
.card:before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#ffd3c4}
.card:hover:before{transform:scaleX(1)}
.card h3{font-size:18px;margin-bottom:10px;line-height:1.45}
.card h4{font-size:16px;margin:14px 0 8px;color:var(--brand)}
.card p{color:var(--muted);font-size:15px}
.card p+p{margin-top:10px}
.card ul{margin:10px 0 0 18px;color:var(--muted);font-size:15px}
.card ul li{margin-bottom:6px}
.card ul li::marker{color:var(--brand)}
.card .icon{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--bg-2),var(--bg-3));display:grid;place-items:center;margin-bottom:16px;transition:transform .35s var(--ease)}
.card:hover .icon{transform:rotate(-6deg) scale(1.08)}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:34px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;text-align:center;transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat .num{font-size:34px;font-weight:800;color:var(--brand);line-height:1.1;font-variant-numeric:tabular-nums}
.stat .label{font-size:14px;color:var(--muted);margin-top:6px}
.timeline{position:relative;margin-top:20px;padding-left:26px;border-left:2px solid var(--line)}
.timeline .item{position:relative;padding-bottom:26px}
.timeline .item:last-child{padding-bottom:0}
.timeline .item:before{content:"";position:absolute;left:-34px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 2px var(--brand);transition:transform .3s var(--ease)}
.timeline .item:hover:before{transform:scale(1.25)}
.timeline h4{font-size:16px;margin-bottom:4px}
.timeline p{color:var(--muted);font-size:15px}
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.article-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;display:flex;flex-direction:column;gap:10px;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease)}
.article-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#ffd3c4}
.article-item .meta{font-size:13px;color:var(--muted);display:flex;gap:14px;flex-wrap:wrap}
.article-item .meta span{color:var(--brand);font-weight:600}
.article-item h3{font-size:17px;line-height:1.45}
.article-item p{color:var(--muted);font-size:14px;flex:1}
.article-item a.more{font-weight:600;font-size:14px;display:inline-flex;align-items:center;gap:4px;transition:gap .3s var(--ease)}
.article-item:hover a.more{gap:9px;text-decoration:none}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;transition:border-color .3s var(--ease),box-shadow .3s var(--ease)}
.faq-item:hover{border-color:#ffd3c4;box-shadow:var(--shadow)}
.faq-item[open]{border-color:#ffd3c4;box-shadow:var(--shadow)}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:600;font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:16px;transition:color .25s var(--ease)}
.faq-item summary:hover{color:var(--brand)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{font-size:20px;color:var(--brand);transition:transform .35s var(--ease);flex:none;line-height:1}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item .answer{padding:0 22px 20px;color:var(--muted);font-size:15px;animation:fadeInUp .4s var(--ease)}
@keyframes fadeInUp{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.howto{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.howto .step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.howto .step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.howto .step .n{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;font-weight:700;margin-bottom:12px;box-shadow:0 6px 16px rgba(255,90,54,.3)}
.howto .step h3{font-size:16px;margin-bottom:8px}
.howto .step p{color:var(--muted);font-size:14px}
.howto .step ul{margin:8px 0 0 18px;color:var(--muted);font-size:14px}
.howto .step ul li{margin-bottom:5px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}
.contact-info{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px}
.contact-info h3{margin-bottom:18px}
.contact-info dl{display:grid;grid-template-columns:auto 1fr;gap:10px 18px;font-size:15px}
.contact-info dt{color:var(--muted)}
.contact-info dd{font-weight:600;word-break:break-word}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px}
.contact-form h3{margin-bottom:18px}
.contact-form label{display:block;font-size:14px;margin-bottom:6px;font-weight:600}
.contact-form input,.contact-form textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:15px;font-family:inherit;margin-bottom:16px;background:var(--bg-2);color:var(--ink);transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease)}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,90,54,.12);background:#fff}
.contact-form textarea{min-height:110px;resize:vertical}
.contact-form button{width:100%}
footer.site{background:#1f2329;color:#c9cfd8;padding:56px 0 0;font-size:14px}
footer.site .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
footer.site h4{color:#fff;font-size:15px;margin-bottom:14px}
footer.site ul{list-style:none;display:flex;flex-direction:column;gap:8px}
footer.site a{color:#c9cfd8}
footer.site a:hover{color:#fff;text-decoration:none}
footer.site p{color:#a3acb9}
footer .brand-line{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px;margin-bottom:12px}
footer .copyright{border-top:1px solid #333a44;margin-top:40px;padding:20px 0;text-align:center;font-size:13px;color:#8b939e}
.back-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;border:0;cursor:pointer;display:grid;place-items:center;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .3s var(--ease),transform .3s var(--ease);z-index:90;font-size:18px}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{transform:translateY(-3px) scale(1.05)}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.breadcrumb{font-size:13px;color:var(--muted);padding:14px 0}
.breadcrumb ol{list-style:none;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb li+li:before{content:"/";margin-right:8px;color:#c9cfd8}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.note{background:#fff;border-left:4px solid var(--brand);border-radius:10px;padding:18px 22px;color:var(--muted);font-size:15px;margin-top:20px;box-shadow:0 4px 14px rgba(0,0,0,.03)}
.author-box{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;margin-top:30px}
.author-box .avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--bg-2),var(--bg-3));display:grid;place-items:center;flex:none}
.author-box h4{font-size:15px;margin-bottom:4px}
.author-box p{font-size:13px;color:var(--muted)}
body.dark{--ink:#e8ebf0;--muted:#a3acb9;--bg:#15181d;--bg-2:#1d222a;--bg-3:#232932;--line:#2a303a;--glass:rgba(21,24,29,.72);--glass-line:rgba(255,255,255,.08);--shadow:0 10px 30px rgba(0,0,0,.4);--shadow-lg:0 24px 60px rgba(0,0,0,.55)}
body.dark header.site{background:var(--glass)}
body.dark .card,body.dark .stat,body.dark .article-item,body.dark .faq-item,body.dark .howto .step,body.dark .contact-info,body.dark .contact-form,body.dark .author-box,body.dark .carousel,body.dark .note{background:#1d222a}
body.dark .btn-ghost{background:#1d222a}
body.dark .icon-btn,body.dark .menu-toggle{background:#1d222a;color:#e8ebf0}
body.dark .search-box{background:#1d222a}
body.dark .search-box input{color:#e8ebf0}
body.dark .search-box input::placeholder{color:#6b7480}
body.dark .hero{background:linear-gradient(135deg,#1d222a 0%,#2a1f1b 50%,#33231d 100%)}
body.dark .hero:before{background:rgba(255,90,54,.18)}
body.dark .hero:after{background:rgba(255,179,71,.14)}
body.dark .section-head .kicker{background:#1d222a}
body.dark .contact-form input,body.dark .contact-form textarea{background:#232932;color:#e8ebf0}
body.dark .contact-form input:focus,body.dark .contact-form textarea:focus{background:#1d222a}
body.dark .timeline .item:before{border-color:#1d222a}
body.dark .card:hover,body.dark .article-item:hover,body.dark .faq-item:hover{border-color:#ff8a5c}
body.dark .faq-item[open]{border-color:#ff8a5c}
body.dark footer.site{background:#101318}
body.dark .carousel-dots button{background:#3a414c}
body.dark .carousel-dots button.active{background:var(--brand)}
@media(max-width:960px){
.hero .wrap{grid-template-columns:1fr}
.hero-art{order:-1}
.hero-art svg{max-width:300px}
.grid-3,.grid-4,.article-list,.howto,.contact-grid{grid-template-columns:1fr 1fr}
.stat-row{grid-template-columns:1fr 1fr}
footer.site .wrap{grid-template-columns:1fr 1fr}
nav.main{display:none;position:absolute;top:64px;left:0;right:0;background:var(--glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:16px 20px;box-shadow:var(--shadow)}
body.dark nav.main{background:rgba(21,24,29,.96)}
nav.main.open{display:block;animation:fadeInUp .3s var(--ease)}
nav.main ul{flex-direction:column;gap:14px}
.menu-toggle{display:grid;place-items:center}
.search-box input{width:90px}
section{padding:52px 0}
}
@media(max-width:600px){
.grid-3,.grid-4,.grid-2,.article-list,.howto,.contact-grid{grid-template-columns:1fr}
.stat-row{grid-template-columns:1fr 1fr}
footer.site .wrap{grid-template-columns:1fr}
.topbar .wrap{justify-content:center;text-align:center}
.slide{flex-direction:column;align-items:flex-start;padding:22px}
.hero{padding:40px 0 48px}
.hero h1{font-size:clamp(24px,7vw,32px)}
.hero p.lead{font-size:16px}
.hero-cta .btn{flex:1;justify-content:center}
.search-box{display:none}
.contact-info dl{grid-template-columns:1fr;gap:4px 0}
.contact-info dt{margin-top:8px}
.card,.article-item,.howto .step,.contact-info,.contact-form{padding:20px}
.section-head{margin-bottom:26px}
.back-top{right:14px;bottom:14px;width:42px;height:42px}
.author-box{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){
*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
.reveal{opacity:1;transform:none}
}
@media print{
header.site,nav.main,.nav-actions,.back-top,.topbar{display:none!important}
body{background:#fff;color:#000}
.card,.article-item,.faq-item,.stat{break-inside:avoid;box-shadow:none}
}