:root{
--brand-900:#0F172A;
--brand-800:#1F2937;
--brand-700:#243447;
--brand-600:#334155;
--brand-500:#3B5B7A;
--brand-400:#5B7A99;
--brand-300:#8FA6BC;
--accent-600:#B45309;
--accent-500:#D97706;
--accent-400:#F59E0B;
--text-primary:#17202A;
--text-secondary:#334155;
--text-muted:#4B5563;
--text-soft:#6B7280;
--bg-page:#FFFFFF;
--bg-soft:#F8FAFC;
--bg-card:#FFFFFF;
--bg-elevated:#F1F5F9;
--border-color:#E2E8F0;
--border-strong:#CBD5E1;
--link-color:#1D4ED8;
--link-hover:#1E3A8A;
--btn-primary-bg:#1F2937;
--btn-primary-text:#FFFFFF;
--btn-accent-bg:#B45309;
--btn-accent-text:#FFFFFF;
--success:#047857;
--shadow-sm:0 1px 2px rgba(15,23,42,0.06);
--shadow-md:0 4px 12px rgba(15,23,42,0.08);
--shadow-lg:0 12px 32px rgba(15,23,42,0.10);
--glass-bg:rgba(255,255,255,0.65);
--glass-border:rgba(255,255,255,0.45);
--glass-blur:14px;
--radius:10px;
--radius-lg:16px;
--max-width:1200px;
--transition:color .25s ease, background-color .25s ease, border-color .25s ease, box-shadow .25s ease, transform .25s ease;
}
html[data-theme="dark"]{
--brand-900:#F8FAFC;
--brand-800:#E5E7EB;
--brand-700:#CBD5E1;
--brand-600:#94A3B8;
--brand-500:#64748B;
--brand-400:#475569;
--brand-300:#334155;
--accent-600:#FBBF24;
--accent-500:#F59E0B;
--accent-400:#FCD34D;
--text-primary:#F1F5F9;
--text-secondary:#E2E8F0;
--text-muted:#CBD5E1;
--text-soft:#94A3B8;
--bg-page:#0B1220;
--bg-soft:#111827;
--bg-card:#1A2332;
--bg-elevated:#1F2937;
--border-color:#334155;
--border-strong:#475569;
--link-color:#93C5FD;
--link-hover:#BFDBFE;
--btn-primary-bg:#F1F5F9;
--btn-primary-text:#0F172A;
--btn-accent-bg:#F59E0B;
--btn-accent-text:#0F172A;
--success:#34D399;
--shadow-sm:0 1px 2px rgba(0,0,0,0.4);
--shadow-md:0 4px 12px rgba(0,0,0,0.5);
--shadow-lg:0 12px 32px rgba(0,0,0,0.6);
--glass-bg:rgba(26,35,50,0.62);
--glass-border:rgba(148,163,184,0.28);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
background-color:var(--bg-page);
color:var(--text-primary);
line-height:1.85;
font-size:16px;
-webkit-font-smoothing:antialiased;
transition:background-color .3s ease, color .3s ease;
overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:var(--link-color);text-decoration:none;transition:var(--transition)}
a:hover,a:focus{color:var(--link-hover);text-decoration:underline}
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--btn-primary-bg);color:var(--btn-primary-text);padding:10px 16px;z-index:9999;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
.site-header{
position:sticky;top:0;z-index:1000;
background-color:var(--glass-bg);
-webkit-backdrop-filter:blur(var(--glass-blur)) saturate(1.4);
backdrop-filter:blur(var(--glass-blur)) saturate(1.4);
border-bottom:1px solid var(--glass-border);
box-shadow:var(--shadow-sm);
transition:background-color .3s ease, border-color .3s ease;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{width:40px;height:40px;border-radius:10px;overflow:hidden;flex-shrink:0;box-shadow:var(--shadow-sm)}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:19px;font-weight:800;color:var(--text-primary);letter-spacing:.5px}
.brand-slogan{font-size:12px;color:var(--text-soft)}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
padding:8px 12px;border-radius:8px;font-size:15px;font-weight:500;
color:var(--text-secondary);transition:var(--transition);position:relative;
}
.main-nav a:hover,.main-nav a:focus{background-color:var(--bg-elevated);color:var(--text-primary);text-decoration:none;transform:translateY(-1px)}
.header-actions{display:flex;align-items:center;gap:8px}
.search-box{display:flex;align-items:center;border:1px solid var(--border-strong);border-radius:8px;overflow:hidden;background-color:var(--bg-card);transition:var(--transition)}
.search-box:focus-within{border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(217,119,6,0.15)}
.search-box input{
border:none;outline:none;padding:7px 10px;font-size:14px;width:150px;
background-color:transparent;color:var(--text-primary);
}
.search-box input::placeholder{color:var(--text-soft)}
.search-box button{
border:none;background-color:var(--btn-primary-bg);color:var(--btn-primary-text);
padding:7px 12px;font-size:14px;cursor:pointer;transition:var(--transition);
}
.search-box button:hover{opacity:.88}
.theme-toggle,.menu-toggle{
border:1px solid var(--border-strong);background-color:var(--bg-card);
color:var(--text-secondary);width:38px;height:36px;border-radius:8px;
cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;
transition:var(--transition);
}
.theme-toggle:hover,.menu-toggle:hover{background-color:var(--bg-elevated);color:var(--text-primary);transform:translateY(-1px)}
.menu-toggle{display:none}
.mobile-nav{display:none;flex-direction:column;padding:8px 0 16px;border-top:1px solid var(--border-color)}
.mobile-nav.open{display:flex;animation:slideDown .3s ease}
.mobile-nav a{padding:12px 8px;color:var(--text-secondary);font-size:16px;border-bottom:1px solid var(--border-color);transition:var(--transition)}
.mobile-nav a:hover{color:var(--text-primary);background-color:var(--bg-elevated);padding-left:16px}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.hero{
position:relative;overflow:hidden;
background:linear-gradient(135deg,#1F2937 0%,#334155 55%,#3B5B7A 100%);
color:#F8FAFC;padding:64px 0 56px;
}
html[data-theme="dark"] .hero{background:linear-gradient(135deg,#0B1220 0%,#1A2332 55%,#243447 100%)}
.hero::before{
content:"";position:absolute;inset:0;
background:radial-gradient(circle at 12% 88%, rgba(59,91,122,0.35), transparent 55%);
pointer-events:none;
}
.hero::after{
content:"";position:absolute;inset:0;
background:radial-gradient(circle at 82% 18%, rgba(245,158,11,0.22), transparent 55%);
pointer-events:none;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero h1{font-size:38px;line-height:1.3;font-weight:800;color:#FFFFFF;margin-bottom:18px;letter-spacing:.5px}
.hero h1 .hl{color:#FCD34D;background:linear-gradient(120deg,rgba(245,158,11,0.28),rgba(245,158,11,0));padding:0 6px;border-radius:6px}
.hero-lead{font-size:17px;color:#E2E8F0;margin-bottom:14px;max-width:640px}
.hero-desc{font-size:15px;color:#CBD5E1;margin-bottom:26px;max-width:640px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.btn{
display:inline-flex;align-items:center;justify-content:center;gap:8px;
padding:12px 24px;border-radius:10px;font-size:16px;font-weight:600;
cursor:pointer;border:1px solid transparent;transition:var(--transition);
text-decoration:none;position:relative;overflow:hidden;
}
.btn::after{
content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent,rgba(255,255,255,0.28),transparent);
transform:translateX(-120%);transition:transform .55s ease;
}
.btn:hover::after{transform:translateX(120%)}
.btn-primary{background-color:#F59E0B;color:#1F2937;border-color:#F59E0B;box-shadow:0 6px 18px rgba(245,158,11,0.32)}
.btn-primary:hover,.btn-primary:focus{background-color:#FCD34D;color:#0F172A;text-decoration:none;transform:translateY(-2px);box-shadow:0 10px 24px rgba(245,158,11,0.42)}
.btn-ghost{background-color:rgba(248,250,252,0.10);color:#F8FAFC;border-color:rgba(248,250,252,0.55);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.btn-ghost:hover,.btn-ghost:focus{background-color:rgba(248,250,252,0.22);color:#FFFFFF;text-decoration:none;transform:translateY(-2px)}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:8px}
.stat-card{
background-color:rgba(248,250,252,0.10);
border:1px solid rgba(248,250,252,0.28);
border-radius:var(--radius);padding:16px 18px;
-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
transition:var(--transition);
}
.stat-card:hover{background-color:rgba(248,250,252,0.18);transform:translateY(-3px)}
.stat-num{font-size:28px;font-weight:800;color:#FCD34D;line-height:1.2}
.stat-label{font-size:13px;color:#E2E8F0;margin-top:2px}
.hero-slides{position:relative;min-height:220px}
.hero-slide{
position:absolute;inset:0;opacity:0;transition:opacity .8s ease, transform .8s ease;
display:flex;align-items:center;justify-content:center;transform:scale(.98);
}
.hero-slide.active{opacity:1;position:relative;transform:scale(1)}
.hero-slide svg{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.section{padding:64px 0}
.section.alt{background-color:var(--bg-soft)}
.section-head{max-width:820px;margin:0 auto 40px;text-align:center}
.section-head h2{font-size:30px;font-weight:800;color:var(--text-primary);margin-bottom:14px;letter-spacing:.4px}
.section-head p{font-size:16px;color:var(--text-muted)}
.eyebrow{
display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;
color:var(--accent-600);text-transform:uppercase;margin-bottom:10px;
}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
background-color:var(--bg-card);border:1px solid var(--border-color);
border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-sm);
transition:var(--transition);position:relative;overflow:hidden;
}
.card::before{
content:"";position:absolute;top:0;left:0;right:0;height:3px;
background:linear-gradient(90deg,var(--accent-500),var(--brand-500));
transform:scaleX(0);transform-origin:left;transition:transform .35s ease;
}
.card:hover{box-shadow:var(--shadow-md);border-color:var(--border-strong);transform:translateY(-4px)}
.card:hover::before{transform:scaleX(1)}
.card h3{font-size:19px;font-weight:700;color:var(--text-primary);margin-bottom:10px}
.card h4{font-size:16px;font-weight:700;color:var(--text-secondary);margin:14px 0 8px}
.card p{font-size:15px;color:var(--text-muted);margin-bottom:10px}
.card ul{margin:10px 0 0 18px}
.card li{font-size:15px;color:var(--text-muted);margin-bottom:6px}
.icon-badge{
width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;
background-color:var(--bg-elevated);margin-bottom:16px;transition:var(--transition);
}
.card:hover .icon-badge{transform:scale(1.06) rotate(-3deg);background:linear-gradient(135deg,var(--bg-elevated),rgba(245,158,11,0.18))}
.prose{max-width:900px;margin:0 auto}
.prose h2{font-size:26px;font-weight:800;color:var(--text-primary);margin:36px 0 16px}
.prose h3{font-size:20px;font-weight:700;color:var(--text-primary);margin:26px 0 12px}
.prose h4{font-size:17px;font-weight:700;color:var(--text-secondary);margin:20px 0 10px}
.prose p{font-size:16px;color:var(--text-secondary);margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 18px 22px}
.prose li{font-size:16px;color:var(--text-secondary);margin-bottom:8px}
.prose strong{color:var(--text-primary);font-weight:700}
.table-wrap{overflow-x:auto;border:1px solid var(--border-color);border-radius:var(--radius);margin:20px 0;box-shadow:var(--shadow-sm)}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:12px 16px;text-align:left;font-size:15px;border-bottom:1px solid var(--border-color)}
th{background-color:var(--bg-elevated);color:var(--text-primary);font-weight:700}
td{color:var(--text-secondary);background-color:var(--bg-card);transition:background-color .25s ease}
tbody tr:hover td{background-color:var(--bg-elevated)}
tr:last-child td{border-bottom:none}
.article-list{display:grid;gap:18px}
.article-item{
background-color:var(--bg-card);border:1px solid var(--border-color);
border-radius:var(--radius);padding:22px;transition:var(--transition);
}
.article-item:hover{box-shadow:var(--shadow-md);border-color:var(--border-strong);transform:translateY(-3px)}
.article-item h3{font-size:18px;font-weight:700;color:var(--text-primary);margin-bottom:8px}
.article-meta{font-size:13px;color:var(--text-soft);margin-bottom:10px;display:flex;gap:14px;flex-wrap:wrap}
.article-item p{font-size:15px;color:var(--text-muted);margin-bottom:12px}
.read-more{font-size:15px;font-weight:600;color:var(--link-color);display:inline-block;transition:var(--transition)}
.read-more:hover{color:var(--link-hover);transform:translateX(4px)}
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:12px}
.faq-item{
background-color:var(--bg-card);border:1px solid var(--border-color);
border-radius:var(--radius);overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:var(--border-strong);box-shadow:var(--shadow-sm)}
.faq-item.open{box-shadow:var(--shadow-md);border-color:var(--accent-500)}
.faq-q{
width:100%;text-align:left;background-color:transparent;border:none;
padding:18px 20px;font-size:16px;font-weight:700;color:var(--text-primary);
cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px;
font-family:inherit;transition:var(--transition);
}
.faq-q:hover{background-color:var(--bg-elevated)}
.faq-q .arrow{flex-shrink:0;transition:transform .3s ease;color:var(--accent-600);font-weight:700}
.faq-item.open .faq-q .arrow{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;color:var(--text-secondary);line-height:1.85}
.steps{counter-reset:step;display:grid;gap:18px;max-width:900px;margin:0 auto}
.step{
position:relative;background-color:var(--bg-card);border:1px solid var(--border-color);
border-radius:var(--radius);padding:22px 22px 22px 74px;transition:var(--transition);
}
.step:hover{border-color:var(--border-strong);box-shadow:var(--shadow-md);transform:translateX(4px)}
.step::before{
counter-increment:step;content:counter(step);
position:absolute;left:20px;top:20px;width:38px;height:38px;border-radius:50%;
background:linear-gradient(135deg,var(--btn-primary-bg),var(--brand-500));color:var(--btn-primary-text);
display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;
box-shadow:var(--shadow-sm);
}
.step h3{font-size:17px;font-weight:700;color:var(--text-primary);margin-bottom:8px}
.step p{font-size:15px;color:var(--text-muted)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-info{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);transition:var(--transition)}
.contact-info:hover{box-shadow:var(--shadow-md)}
.contact-info h3{font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:16px}
.contact-info dl{display:grid;grid-template-columns:auto 1fr;gap:10px 16px}
.contact-info dt{font-size:15px;font-weight:700;color:var(--text-secondary)}
.contact-info dd{font-size:15px;color:var(--text-muted)}
.contact-form{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);transition:var(--transition)}
.contact-form:hover{box-shadow:var(--shadow-md)}
.contact-form h3{font-size:20px;font-weight:700;color:var(--text-primary);margin-bottom:16px}
.form-field{margin-bottom:16px}
.form-field label{display:block;font-size:14px;font-weight:700;color:var(--text-secondary);margin-bottom:6px}
.form-field input,.form-field textarea{
width:100%;padding:11px 14px;border:1px solid var(--border-strong);border-radius:8px;
background-color:var(--bg-page);color:var(--text-primary);font-size:15px;font-family:inherit;
outline:none;transition:var(--transition);
}
.form-field input::placeholder,.form-field textarea::placeholder{color:var(--text-soft)}
.form-field input:focus,.form-field textarea:focus{border-color:var(--accent-500);box-shadow:0 0 0 3px rgba(217,119,6,0.15)}
.form-note{font-size:13px;color:var(--text-soft);margin-top:10px}
.site-footer{background-color:var(--brand-800);color:#E2E8F0;padding:56px 0 0;margin-top:0;position:relative}
html[data-theme="dark"] .site-footer{background-color:#060B14;color:#CBD5E1}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer-col h4{font-size:16px;font-weight:700;color:#FFFFFF;margin-bottom:16px}
.footer-col p,.footer-col li{font-size:14px;color:#CBD5E1;line-height:1.9}
.footer-col ul{list-style:none}
.footer-col a{color:#CBD5E1;font-size:14px;transition:var(--transition)}
.footer-col a:hover{color:#FFFFFF;text-decoration:underline;padding-left:4px}
.footer-bottom{border-top:1px solid rgba(226,232,240,0.22);padding:22px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:#94A3B8}
.footer-bottom a{color:#CBD5E1}
.footer-bottom a:hover{color:#FFFFFF}
.back-top{
position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;
background-color:var(--btn-primary-bg);color:var(--btn-primary-text);
border:none;cursor:pointer;font-size:20px;display:flex;align-items:center;justify-content:center;
box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transition:var(--transition);z-index:900;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease, transform .6s ease}
.reveal.visible{opacity:1;transform:none}
.breadcrumb{font-size:14px;color:var(--text-soft);padding:14px 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb li{color:var(--text-soft)}
.breadcrumb a{color:var(--link-color)}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--text-soft)}
.tag{
display:inline-block;font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px;
background-color:var(--bg-elevated);color:var(--text-secondary);margin:0 6px 6px 0;transition:var(--transition);
}
.tag:hover{background-color:var(--accent-500);color:#FFFFFF}
.notice{
background-color:var(--bg-elevated);border-left:4px solid var(--accent-500);
border-radius:0 8px 8px 0;padding:16px 20px;font-size:15px;color:var(--text-secondary);margin:18px 0;
}
@media (max-width:1024px){
.hero-inner{grid-template-columns:1fr}
.hero h1{font-size:30px}
.grid-4{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
.main-nav,.search-box{display:none}
.menu-toggle{display:flex}
.grid-3,.grid-2{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.hero{padding:44px 0 40px}
.hero h1{font-size:26px}
.section{padding:44px 0}
.section-head h2{font-size:24px}
.prose h2{font-size:22px}
}
@media (max-width:520px){
.grid-4{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.hero-stats{grid-template-columns:1fr 1fr}
.stat-num{font-size:22px}
.step{padding:20px 18px 20px 66px}
.hero h1{font-size:23px}
.section-head h2{font-size:21px}
}
@media (prefers-reduced-motion:reduce){
*{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
.reveal{opacity:1;transform:none}
}