:root{--brand:#ff6900;--brand-dark:#e05a00;--brand-soft:#fff2e6;--bg:#ffffff;--bg-soft:#f7f8fa;--bg-glass:rgba(255,255,255,.72);--text:#1f2329;--text-soft:#5a6270;--border:#e6e8eb;--shadow:0 4px 16px rgba(0,0,0,.06);--shadow-lg:0 12px 40px rgba(255,105,0,.14);--radius:12px;--radius-lg:20px;--header-h:68px;}
@media(prefers-color-scheme:dark){
:root{--brand:#ff7d1f;--brand-dark:#ff9a3c;--brand-soft:#3a2413;--bg:#0f1115;--bg-soft:#161a20;--bg-glass:rgba(22,26,32,.72);--text:#eef1f5;--text-soft:#a3abb8;--border:#272c34;--shadow:0 4px 16px rgba(0,0,0,.4);--shadow-lg:0 12px 40px 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",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;overflow-x:hidden;transition:background .3s ease,color .3s ease;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{text-decoration:underline;}
img,svg{max-width:100%;display:block;}
ul{list-style:none;}
.container{max-width:1180px;margin:0 auto;padding:0 20px;}

header.site-header{position:sticky;top:0;z-index:100;background:var(--bg-glass);backdrop-filter:blur(14px) saturate(180%);-webkit-backdrop-filter:blur(14px) saturate(180%);border-bottom:1px solid var(--border);transition:background .3s ease,border-color .3s ease;}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--text);}
.logo:hover{text-decoration:none;}
.logo-mark{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,#ff6900,#ff9a3c);display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:800;box-shadow:0 4px 12px rgba(255,105,0,.35);transition:transform .3s ease;}
.logo:hover .logo-mark{transform:rotate(-8deg) scale(1.06);}
nav.main-nav ul{display:flex;gap:26px;list-style:none;}
nav.main-nav a{position:relative;color:var(--text-soft);font-size:15px;padding:4px 0;}
nav.main-nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:2px;background:var(--brand);transition:width .28s ease;}
nav.main-nav a:hover{color:var(--brand);text-decoration:none;}
nav.main-nav a:hover::after{width:100%;}
.menu-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--text);line-height:1;}

.breadcrumb{font-size:14px;color:var(--text-soft);padding:16px 0;}
.breadcrumb a{color:var(--text-soft);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb span{margin:0 6px;}

.hero{position:relative;background:linear-gradient(135deg,#fff5ec 0%,#ffe8d6 55%,#ffd9bd 100%);padding:56px 0 48px;overflow:hidden;}
.hero::before{content:"";position:absolute;top:-120px;right:-100px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,105,0,.22),transparent 68%);pointer-events:none;}
.hero::after{content:"";position:absolute;bottom:-160px;left:-120px;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(255,154,60,.2),transparent 70%);pointer-events:none;}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.hero h1{font-size:34px;line-height:1.35;margin-bottom:18px;font-weight:800;letter-spacing:.2px;}
.hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(135deg,#ff6900,#ff9a3c);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.hero p.lead{font-size:16px;color:var(--text-soft);margin-bottom:24px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease;will-change:transform;}
.btn-primary{background:linear-gradient(135deg,#ff6900,#ff9a3c);color:#fff;box-shadow:0 6px 18px rgba(255,105,0,.32);}
.btn-primary:hover{background:linear-gradient(135deg,#e05a00,#ff8a2c);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,105,0,.42);}
.btn-ghost{border:1px solid var(--brand);color:var(--brand);background:var(--bg-glass);backdrop-filter:blur(6px);}
.btn-ghost:hover{background:var(--brand);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,105,0,.28);}
.hero-visual{background:var(--bg-glass);backdrop-filter:blur(14px) saturate(160%);-webkit-backdrop-filter:blur(14px) saturate(160%);border:1px solid rgba(255,255,255,.5);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:22px;text-align:center;transition:transform .4s ease,box-shadow .4s ease;}
.hero-visual:hover{transform:translateY(-6px) scale(1.015);}
.hero-visual svg{margin:0 auto;}

.section{padding:56px 0;}
.section-soft{background:var(--bg-soft);transition:background .3s ease;}
.section-title{font-size:26px;font-weight:800;margin-bottom:12px;position:relative;padding-left:16px;}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:4px;background:linear-gradient(180deg,#ff6900,#ff9a3c);}
.section-sub{color:var(--text-soft);font-size:15px;margin-bottom:34px;max-width:760px;}
h2{font-size:26px;font-weight:800;margin-bottom:14px;}
h3{font-size:19px;font-weight:700;margin:22px 0 12px;}
h4{font-size:16px;font-weight:700;margin:16px 0 8px;}
p{margin-bottom:14px;color:var(--text-soft);}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}

.card{position:relative;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease,background .3s ease;overflow:hidden;}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(135deg,rgba(255,105,0,.06),transparent 45%);opacity:0;transition:opacity .3s ease;pointer-events:none;}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-5px);border-color:rgba(255,105,0,.35);}
.card:hover::before{opacity:1;}
.card h3{margin-top:0;}
.card-icon{width:46px;height:46px;border-radius:12px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;margin-bottom:14px;transition:transform .35s ease,background .3s ease;}
.card:hover .card-icon{transform:rotate(-6deg) scale(1.08);}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;}
.stat-row>div{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:26px 14px;transition:transform .3s ease,box-shadow .3s ease;}
.stat-row>div:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.stat-num{font-size:32px;font-weight:800;background:linear-gradient(135deg,#ff6900,#ff9a3c);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2;}
.stat-label{font-size:14px;color:var(--text-soft);margin-top:6px;}

.timeline{list-style:none;border-left:2px solid var(--border);padding-left:22px;margin-top:10px;}
.timeline li{position:relative;padding-bottom:20px;transition:transform .3s ease;}
.timeline li:hover{transform:translateX(6px);}
.timeline li::before{content:"";position:absolute;left:-29px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(255,105,0,.16);transition:box-shadow .3s ease;}
.timeline li:hover::before{box-shadow:0 0 0 7px rgba(255,105,0,.22);}
.timeline strong{display:block;color:var(--text);}

.faq-item{border:1px solid var(--border);border-radius:14px;margin-bottom:12px;background:var(--bg);overflow:hidden;transition:box-shadow .3s ease,border-color .3s ease,background .3s ease;}
.faq-item:hover{border-color:rgba(255,105,0,.35);}
.faq-item.open{box-shadow:var(--shadow);border-color:rgba(255,105,0,.4);}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:16px 18px;font-size:16px;font-weight:600;cursor:pointer;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:12px;font-family:inherit;transition:color .25s ease;}
.faq-q span{flex-shrink:0;color:var(--brand);font-weight:700;transition:transform .3s ease;}
.faq-item.open .faq-q span{transform:rotate(45deg);}
.faq-a{padding:0 18px 16px;color:var(--text-soft);font-size:15px;display:none;animation:fadeSlide .35s ease;}
.faq-item.open .faq-a{display:block;}
.faq-item.open .faq-q{color:var(--brand);}
@keyframes fadeSlide{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}

.article-card{position:relative;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;}
.article-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-5px);border-color:rgba(255,105,0,.35);}
.article-meta{font-size:13px;color:var(--text-soft);margin-bottom:8px;}
.article-card h3{font-size:17px;margin:0 0 8px;transition:color .25s ease;}
.article-card:hover h3{color:var(--brand);}
.article-card p{font-size:14px;margin-bottom:12px;}
.read-more{font-size:14px;font-weight:600;display:inline-block;transition:transform .25s ease;}
.article-card:hover .read-more{transform:translateX(4px);}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;}
.contact-info li{list-style:none;margin-bottom:14px;font-size:15px;color:var(--text-soft);}
.contact-info strong{color:var(--text);}

.search-box{display:flex;gap:8px;margin-top:8px;}
.search-box input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:10px;font-size:14px;background:var(--bg);color:var(--text);font-family:inherit;transition:border-color .25s ease,box-shadow .25s ease;}
.search-box input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,105,0,.16);}
.search-box button{padding:10px 18px;border:none;border-radius:10px;background:linear-gradient(135deg,#ff6900,#ff9a3c);color:#fff;cursor:pointer;font-size:14px;font-weight:600;font-family:inherit;transition:transform .2s ease,box-shadow .2s ease;}
.search-box button:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,105,0,.35);}

footer.site-footer{background:#1f2329;color:#c7ccd4;padding:48px 0 24px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px;}
footer.site-footer h4{color:#fff;font-size:15px;margin-bottom:14px;}
footer.site-footer ul{list-style:none;}
footer.site-footer li{margin-bottom:8px;}
footer.site-footer a{color:#c7ccd4;transition:color .2s ease,padding-left .2s ease;}
footer.site-footer a:hover{color:#fff;text-decoration:none;padding-left:3px;}
footer.site-footer p{color:#9aa1ab;}
.footer-bottom{border-top:1px solid #33383f;padding-top:20px;text-align:center;color:#8b919b;font-size:13px;}
.footer-bottom p{color:#8b919b;margin-bottom:6px;}

.back-top{position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#ff6900,#ff9a3c);color:#fff;border:none;cursor:pointer;font-size:18px;display:none;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(255,105,0,.4);z-index:200;transition:transform .25s ease,opacity .25s ease;}
.back-top:hover{transform:translateY(-4px) scale(1.06);}
.back-top.show{display:flex;animation:fadeSlide .3s ease;}

.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:none;}

@media(max-width:900px){
.hero-grid,.grid-3,.grid-2,.stat-row,.footer-grid,.contact-grid{grid-template-columns:1fr;}
nav.main-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--bg-glass);backdrop-filter:blur(14px) saturate(180%);-webkit-backdrop-filter:blur(14px) saturate(180%);border-bottom:1px solid var(--border);padding:16px 20px;box-shadow:var(--shadow);}
nav.main-nav.open{display:block;animation:fadeSlide .28s ease;}
nav.main-nav ul{flex-direction:column;gap:14px;}
.menu-toggle{display:block;}
.hero h1{font-size:26px;}
.hero{padding:40px 0 36px;}
.section{padding:44px 0;}
.section-title{font-size:22px;}
h2{font-size:22px;}
.stat-num{font-size:26px;}
.footer-grid{gap:24px;}
}
@media(max-width:520px){
.container{padding:0 16px;}
.hero h1{font-size:22px;}
.hero-actions{flex-direction:column;align-items:stretch;}
.btn{text-align:center;}
.stat-row>div{padding:20px 12px;}
.back-top{right:14px;bottom:18px;width:40px;height:40px;}
}
@media(prefers-reduced-motion:reduce){
*{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}
.reveal{opacity:1;transform:none;}
}