*{margin:0;padding:0;box-sizing:border-box}
:root{
--brand:#c0392b;
--brand-dark:#96281b;
--brand-light:#e74c3c;
--accent:#f39c12;
--bg:#ffffff;
--bg-soft:#fbf9f8;
--text:#222;
--muted:#666;
--card:#f7f7f7;
--border:#e3e3e3;
--glass:rgba(255,255,255,.65);
--glass-border:rgba(255,255,255,.5);
--shadow-sm:0 2px 8px rgba(0,0,0,.06);
--shadow-md:0 8px 24px rgba(0,0,0,.1);
--shadow-lg:0 16px 40px rgba(0,0,0,.16);
--radius:14px;
--radius-sm:10px;
--ease:cubic-bezier(.22,.61,.36,1);
}
body.dark{
--bg:#141414;
--bg-soft:#1a1a1a;
--text:#e8e8e8;
--muted:#aaa;
--card:#1f1f1f;
--border:#333;
--glass:rgba(30,30,30,.6);
--glass-border:rgba(255,255,255,.08);
--shadow-sm:0 2px 8px rgba(0,0,0,.4);
--shadow-md:0 8px 24px rgba(0,0,0,.5);
--shadow-lg:0 16px 40px rgba(0,0,0,.6);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
color:var(--text);
background:var(--bg);
line-height:1.8;
font-size:16px;
transition:background .35s var(--ease),color .35s var(--ease);
overflow-x:hidden;
-webkit-font-smoothing:antialiased;
}
body::before{
content:"";
position:fixed;
top:0;left:0;right:0;bottom:0;
pointer-events:none;
z-index:-1;
background:
radial-gradient(circle at 12% 8%,rgba(192,57,43,.08),transparent 42%),
radial-gradient(circle at 88% 12%,rgba(243,156,18,.07),transparent 40%),
radial-gradient(circle at 50% 92%,rgba(142,68,173,.06),transparent 45%);
}
body.dark::before{
background:
radial-gradient(circle at 12% 8%,rgba(192,57,43,.14),transparent 42%),
radial-gradient(circle at 88% 12%,rgba(243,156,18,.08),transparent 40%),
radial-gradient(circle at 50% 92%,rgba(142,68,173,.1),transparent 45%);
}
a{color:var(--brand);text-decoration:none;transition:color .25s var(--ease)}
a:hover{text-decoration:underline}
img,svg{max-width:100%;display:block}
::selection{background:rgba(192,57,43,.25);color:var(--text)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

header.site-header{
position:sticky;top:0;z-index:100;
background:var(--glass);
backdrop-filter:blur(14px) saturate(160%);
-webkit-backdrop-filter:blur(14px) saturate(160%);
border-bottom:1px solid var(--glass-border);
box-shadow:0 1px 6px rgba(0,0,0,.06);
transition:background .35s var(--ease),border-color .35s var(--ease);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--brand);text-decoration:none;transition:transform .3s var(--ease)}
.logo:hover{text-decoration:none;transform:translateY(-1px)}
.logo svg{width:36px;height:36px;transition:transform .5s var(--ease);filter:drop-shadow(0 2px 6px rgba(192,57,43,.35))}
.logo:hover svg{transform:rotate(-8deg) scale(1.06)}
nav.main-nav ul{display:flex;gap:22px;list-style:none}
nav.main-nav a{color:var(--text);font-size:15px;position:relative;padding:4px 0;transition:color .25s var(--ease)}
nav.main-nav a::after{
content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
background:linear-gradient(90deg,var(--brand),var(--accent));
border-radius:2px;transition:width .3s var(--ease);
}
nav.main-nav a:hover{color:var(--brand);text-decoration:none}
nav.main-nav a:hover::after{width:100%}
.header-tools{display:flex;align-items:center;gap:10px}
.search-box{
display:flex;align-items:center;
border:1px solid var(--border);
border-radius:20px;padding:4px 12px;
background:var(--card);
transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .35s var(--ease);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(192,57,43,.15)}
.search-box input{border:none;background:transparent;outline:none;color:var(--text);width:130px;font-size:14px;font-family:inherit}
.search-box input::placeholder{color:var(--muted)}
.search-box button{border:none;background:transparent;cursor:pointer;color:var(--brand);font-size:14px;transition:transform .25s var(--ease)}
.search-box button:hover{transform:scale(1.2)}
.icon-btn{
border:1px solid var(--border);background:var(--card);color:var(--text);
border-radius:50%;width:38px;height:38px;cursor:pointer;font-size:16px;
display:flex;align-items:center;justify-content:center;
transition:transform .3s var(--ease),background .25s var(--ease),border-color .25s var(--ease);
}
.icon-btn:hover{transform:rotate(18deg) scale(1.08);border-color:var(--brand);color:var(--brand)}
.menu-toggle{display:none;border:1px solid var(--border);background:var(--card);color:var(--text);border-radius:8px;padding:6px 10px;cursor:pointer;font-size:18px;transition:background .25s var(--ease),border-color .25s var(--ease)}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}

.breadcrumb{padding:14px 0;font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--muted);transition:color .25s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:var(--brand);font-weight:600}

.banner{
position:relative;overflow:hidden;
border-radius:var(--radius);
margin:10px 0 30px;
background:var(--card);
box-shadow:var(--shadow-md);
}
.slides{display:flex;transition:transform .55s var(--ease)}
.slide{
min-width:100%;padding:56px 40px;
display:flex;flex-direction:column;justify-content:center;
min-height:280px;position:relative;overflow:hidden;
}
.slide::after{
content:"";position:absolute;inset:0;
background:radial-gradient(circle at 85% 20%,rgba(255,255,255,.18),transparent 55%);
pointer-events:none;
}
.slide h2{font-size:28px;margin-bottom:14px;color:#fff;position:relative;z-index:1;text-shadow:0 2px 10px rgba(0,0,0,.2)}
.slide p{color:rgba(255,255,255,.94);max-width:720px;font-size:15px;position:relative;z-index:1}
.slide.s1{background:linear-gradient(135deg,#c0392b 0%,#8e1f14 60%,#5e130c 100%)}
.slide.s2{background:linear-gradient(135deg,#2c3e50 0%,#3d5a80 55%,#4a6fa5 100%)}
.slide.s3{background:linear-gradient(135deg,#8e44ad 0%,#6c3483 55%,#4a1f5e 100%)}
.banner-dots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;gap:8px;z-index:2}
.banner-dots button{
width:10px;height:10px;border-radius:50%;border:none;
background:rgba(255,255,255,.5);cursor:pointer;
transition:background .3s var(--ease),transform .3s var(--ease),width .3s var(--ease);
}
.banner-dots button:hover{background:rgba(255,255,255,.85);transform:scale(1.15)}
.banner-dots button.active{background:#fff;width:26px;border-radius:5px}

section{padding:34px 0;border-bottom:1px solid var(--border);transition:border-color .35s var(--ease)}
section:last-of-type{border-bottom:none}
section h2{
font-size:24px;margin-bottom:18px;color:var(--brand);
position:relative;padding-left:14px;
}
section h2::before{
content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;
background:linear-gradient(180deg,var(--brand),var(--accent));
border-radius:3px;
}
section h3{font-size:19px;margin:22px 0 10px}
section h4{font-size:16px;margin:16px 0 8px;color:var(--brand-dark);transition:color .35s var(--ease)}
body.dark section h4{color:#e88}
p{margin-bottom:12px;color:var(--text)}
.muted{color:var(--muted);font-size:14px}

.grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}

.card{
background:var(--glass);
backdrop-filter:blur(10px);
-webkit-backdrop-filter:blur(10px);
border:1px solid var(--border);
border-radius:var(--radius);
padding:20px;
box-shadow:var(--shadow-sm);
transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(192,57,43,.35)}
.card h3{margin-top:0;font-size:17px}
.card ul{list-style:none}
.card li{margin-bottom:8px;font-size:14px}
.card li a{color:var(--text);transition:color .25s var(--ease),padding-left .25s var(--ease)}
.card li a:hover{color:var(--brand);padding-left:4px;text-decoration:none}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stats>div{
background:var(--glass);
backdrop-filter:blur(10px);
-webkit-backdrop-filter:blur(10px);
border:1px solid var(--border);
border-radius:var(--radius);
padding:24px 12px;
box-shadow:var(--shadow-sm);
transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.stats>div:hover{transform:translateY(-4px) scale(1.02);box-shadow:var(--shadow-md);border-color:rgba(192,57,43,.35)}
.stat-num{font-size:32px;font-weight:700;color:var(--brand);line-height:1.2}
.stat-label{font-size:14px;color:var(--muted);margin-top:4px}

.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.article-item{
background:var(--glass);
backdrop-filter:blur(10px);
-webkit-backdrop-filter:blur(10px);
border:1px solid var(--border);
border-radius:var(--radius);
padding:18px;
box-shadow:var(--shadow-sm);
transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.article-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(192,57,43,.35)}
.article-item h3{font-size:16px;margin:0 0 8px;line-height:1.5}
.article-item h3 a{color:var(--text)}
.article-item .meta{font-size:12px;color:var(--muted);margin-bottom:8px}
.article-item p{font-size:14px;color:var(--muted);margin-bottom:10px}
.read-more{font-size:14px;font-weight:600;position:relative;display:inline-block;transition:transform .25s var(--ease)}
.read-more:hover{text-decoration:none;transform:translateX(4px)}

.faq-item{
border:1px solid var(--border);
border-radius:var(--radius-sm);
margin-bottom:10px;overflow:hidden;
background:var(--glass);
backdrop-filter:blur(10px);
-webkit-backdrop-filter:blur(10px);
box-shadow:var(--shadow-sm);
transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .35s var(--ease);
}
.faq-item:hover{border-color:rgba(192,57,43,.35);box-shadow:var(--shadow-md)}
.faq-q{
width:100%;text-align:left;padding:16px 18px;
background:transparent;border:none;
font-size:15px;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 var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q::after{
content:"+";font-size:20px;color:var(--brand);
transition:transform .3s var(--ease);
line-height:1;
}
.faq-item.open .faq-q::after{content:"−";transform:rotate(180deg)}
.faq-a{
max-height:0;overflow:hidden;
transition:max-height .4s var(--ease),padding .4s var(--ease);
padding:0 18px;color:var(--muted);font-size:14px;
}
.faq-item.open .faq-a{max-height:600px;padding:0 18px 16px}

.howto-step{display:flex;gap:16px;margin-bottom:16px;transition:transform .3s var(--ease)}
.howto-step:hover{transform:translateX(4px)}
.step-num{
flex:0 0 40px;height:40px;border-radius:50%;
background:linear-gradient(135deg,var(--brand),var(--brand-dark));
color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;
box-shadow:0 4px 12px rgba(192,57,43,.35);
transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.howto-step:hover .step-num{transform:scale(1.1) rotate(-6deg);box-shadow:0 6px 18px rgba(192,57,43,.5)}
.howto-step h4{margin-top:2px}

.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.contact-item{
display:flex;gap:12px;align-items:flex-start;
background:var(--glass);
backdrop-filter:blur(10px);
-webkit-backdrop-filter:blur(10px);
border:1px solid var(--border);
border-radius:var(--radius-sm);
padding:16px;
box-shadow:var(--shadow-sm);
transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.contact-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(192,57,43,.35)}
.contact-item svg{width:22px;height:22px;flex:0 0 22px;color:var(--brand);margin-top:4px;transition:transform .3s var(--ease)}
.contact-item:hover svg{transform:scale(1.15)}
.contact-item h4{margin-top:0}

.table-wrap{overflow-x:auto;border-radius:var(--radius-sm);box-shadow:var(--shadow-sm)}
table{width:100%;border-collapse:collapse;font-size:14px;background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
th,td{border:1px solid var(--border);padding:10px 12px;text-align:left;transition:background .25s var(--ease)}
th{background:var(--card);font-weight:600;color:var(--brand)}
tbody tr{transition:background .25s var(--ease)}
tbody tr:hover{background:rgba(192,57,43,.06)}

.author-box{
display:flex;gap:16px;align-items:center;
background:var(--glass);
backdrop-filter:blur(12px);
-webkit-backdrop-filter:blur(12px);
border:1px solid var(--border);
border-radius:var(--radius);
padding:18px;
box-shadow:var(--shadow-sm);
transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.author-box:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.author-box svg{width:60px;height:60px;flex:0 0 60px;border-radius:50%;box-shadow:0 4px 12px rgba(192,57,43,.3);transition:transform .4s var(--ease)}
.author-box:hover svg{transform:rotate(6deg) scale(1.05)}
.author-box h4{margin-top:0}

.tag{
display:inline-block;
background:rgba(192,57,43,.12);color:var(--brand);
border-radius:6px;padding:2px 10px;font-size:12px;
margin-right:6px;margin-bottom:6px;
transition:background .25s var(--ease),transform .25s var(--ease);
}
.tag:hover{background:rgba(192,57,43,.22);transform:translateY(-1px)}

.site-footer{
background:linear-gradient(180deg,#1b1b1b,#111);
color:#bbb;padding:40px 0 20px;margin-top:20px;
transition:background .35s var(--ease);
}
body.dark .site-footer{background:linear-gradient(180deg,#0d0d0d,#060606)}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:26px}
.site-footer a{color:#bbb;font-size:14px;transition:color .25s var(--ease),padding-left .25s var(--ease)}
.site-footer a:hover{color:#fff;text-decoration:none;padding-left:3px}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px;font-size:14px}
.footer-bottom{border-top:1px solid #333;margin-top:26px;padding-top:16px;font-size:13px;color:#888;text-align:center}
.footer-bottom p{margin-bottom:6px;color:#888}
.footer-bottom a{color:#aaa}
.footer-bottom a:hover{color:#fff}

.back-top{
position:fixed;right:22px;bottom:22px;
width:46px;height:46px;border-radius:50%;
background:linear-gradient(135deg,var(--brand),var(--brand-dark));
color:#fff;border:none;cursor:pointer;font-size:20px;
display:none;align-items:center;justify-content:center;
z-index:200;box-shadow:0 4px 16px rgba(192,57,43,.45);
transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.back-top.show{display:flex;animation:fadeUp .4s var(--ease)}
.back-top:hover{transform:translateY(-4px) scale(1.08);box-shadow:0 8px 24px rgba(192,57,43,.6)}

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

@keyframes fadeUp{
from{opacity:0;transform:translateY(20px)}
to{opacity:1;transform:none}
}

@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(max-width:900px){
.grid-3,.stats,.article-list,.grid-2,.contact-grid,.footer-grid{grid-template-columns:1fr}
nav.main-nav{
display:none;position:absolute;top:64px;left:0;right:0;
background:var(--glass);
backdrop-filter:blur(16px) saturate(160%);
-webkit-backdrop-filter:blur(16px) saturate(160%);
border-bottom:1px solid var(--border);
padding:12px 20px;
box-shadow:var(--shadow-md);
animation:fadeUp .3s var(--ease);
}
nav.main-nav.open{display:block}
nav.main-nav ul{flex-direction:column;gap:12px}
nav.main-nav a{display:block;padding:6px 0}
.menu-toggle{display:block}
.search-box input{width:80px}
.slide{padding:36px 22px;min-height:240px}
.slide h2{font-size:22px}
section h2{font-size:21px}
.stat-num{font-size:28px}
.author-box{flex-direction:column;text-align:center}
.contact-item{padding:14px}
}

@media(max-width:480px){
.container{padding:0 14px}
.header-inner{height:58px}
.logo{font-size:17px}
.logo svg{width:30px;height:30px}
nav.main-nav{top:58px}
.search-box{padding:3px 8px}
.search-box input{width:64px;font-size:13px}
.icon-btn{width:34px;height:34px;font-size:14px}
.slide{padding:28px 18px;min-height:220px}
.slide h2{font-size:19px}
.slide p{font-size:14px}
section{padding:26px 0}
section h2{font-size:19px}
.card,.article-item,.faq-item{padding:16px}
.stats>div{padding:18px 10px}
.stat-num{font-size:24px}
.howto-step{gap:12px}
.step-num{flex:0 0 34px;height:34px;font-size:14px}
.back-top{right:14px;bottom:14px;width:40px;height:40px;font-size:18px}
}