:root{
  --bg:#f5f7fb;--surface:#fff;--surface-soft:#f8fafc;--text:#172033;--muted:#667085;
  --line:#e7ebf1;--primary:#2563eb;--primary-dark:#1d4ed8;--primary-soft:#eff6ff;
  --green:#059669;--orange:#ea580c;--purple:#7c3aed;--shadow:0 16px 42px rgba(15,23,42,.07);
  --radius:20px;--container:1180px
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7}
a{color:inherit;text-decoration:none}
.container{width:min(calc(100% - 40px),var(--container));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(231,235,241,.9);backdrop-filter:blur(16px)}
.nav{height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:800}
.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,#2563eb,#4f46e5);box-shadow:0 10px 24px rgba(37,99,235,.22);font-weight:900}
.nav-links{display:flex;align-items:center;gap:28px;color:#475467;font-size:14px}
.nav-links a:hover{color:var(--primary)}
.hero{padding:72px 0 48px}
.hero-grid{display:grid;grid-template-columns:1.14fr .86fr;gap:34px}
.hero-main{min-height:420px;padding:52px;border-radius:28px;color:#fff;position:relative;overflow:hidden;background:radial-gradient(circle at 83% 15%,rgba(96,165,250,.52),transparent 25%),radial-gradient(circle at 70% 80%,rgba(99,102,241,.35),transparent 28%),linear-gradient(135deg,#10213f 0%,#17366b 55%,#1d4ed8 100%);box-shadow:0 24px 60px rgba(30,64,175,.16)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.15);color:#dbeafe;font-size:13px}
.eyebrow-dot{width:7px;height:7px;border-radius:50%;background:#60a5fa}
h1{margin:24px 0 18px;font-size:clamp(40px,5vw,64px);line-height:1.12;letter-spacing:-2px}
.hero-desc{max-width:610px;margin:0;color:#dbeafe;font-size:17px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.hero-tags span{padding:8px 13px;border-radius:10px;background:rgba(255,255,255,.1);color:#eff6ff;font-size:13px}
.hero-side{display:grid;grid-template-rows:1fr 1fr;gap:20px}
.feature-card,.category-card,.article-card,.guide-panel,.content-card{background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
.feature-card{padding:30px}
.icon,.category-icon{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;font-size:22px;margin-bottom:20px}
.icon-blue{background:#eff6ff;color:#2563eb}.icon-orange{background:#fff7ed;color:#ea580c}.icon-green{background:#ecfdf5;color:#059669}.icon-purple{background:#f5f3ff;color:#7c3aed}
.feature-card h3,.category-card h3{margin:0 0 8px}.feature-card p,.category-card p{margin:0;color:var(--muted);font-size:14px}
section{padding:42px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}
.section-head h2{margin:0 0 6px;font-size:30px}.section-head p{margin:0;color:var(--muted)}.section-note{font-size:13px;color:#98a2b3}
.categories{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.category-card{padding:26px;transition:.25s ease}
.category-card:hover,.article-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#d8e2f0}
.articles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.article-card{display:flex;flex-direction:column;min-height:300px;overflow:hidden;transition:.25s ease}
.article-cover{height:132px;padding:22px;display:flex;align-items:flex-end;color:#fff;font-weight:700;font-size:14px}
.cover-1{background:linear-gradient(135deg,#1e3a8a,#2563eb)}.cover-2{background:linear-gradient(135deg,#334155,#0f766e)}
.cover-3{background:linear-gradient(135deg,#7c2d12,#ea580c)}.cover-4{background:linear-gradient(135deg,#4c1d95,#7c3aed)}
.cover-5{background:linear-gradient(135deg,#0f172a,#475569)}.cover-6{background:linear-gradient(135deg,#064e3b,#059669)}
.article-body{padding:24px;display:flex;flex-direction:column;flex:1}.article-meta{font-size:12px;color:#98a2b3;margin-bottom:10px}
.article-body h3{font-size:18px;line-height:1.5;margin:0 0 10px}.article-body p{font-size:14px;color:var(--muted);margin:0}
.article-link{margin-top:auto;padding-top:18px;color:var(--primary);font-size:14px;font-weight:700}
.guide{display:grid;grid-template-columns:1fr 1fr;gap:20px}.guide-panel{padding:32px}.guide-panel h3{margin:0 0 22px;font-size:22px}
.steps{display:grid;gap:18px}.step{display:flex;gap:16px}.step-no{flex:0 0 34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:800;font-size:13px}
.step strong{display:block;margin-bottom:3px;font-size:15px}.step p{margin:0;color:var(--muted);font-size:13px}
.notice{padding:32px;border-radius:24px;background:linear-gradient(135deg,#eff6ff,#f8fafc);border:1px solid #dbeafe}.notice h3{margin:0 0 10px;font-size:22px}.notice p{margin:0;color:#52627a}
.page-hero{padding:64px 0 30px}.page-hero-card{padding:46px;border-radius:28px;color:white;background:linear-gradient(135deg,#0f274d,#1d4ed8)}
.page-hero h1{font-size:44px;margin:12px 0 12px}.page-hero p{max-width:760px;margin:0;color:#dbeafe}
.breadcrumb{font-size:13px;color:#dbeafe}
.content-wrap{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;padding:10px 0 56px}
.content-card{padding:36px}.content-card h2{margin-top:34px;font-size:26px}.content-card h2:first-child{margin-top:0}.content-card h3{margin-top:28px}
.content-card p,.content-card li{color:#475467}.content-card ul{padding-left:20px}
.tip{padding:18px 20px;border-radius:14px;background:#eff6ff;border:1px solid #dbeafe;color:#1e3a8a;margin:22px 0}
.side-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;position:sticky;top:94px}
.side-card h3{margin-top:0}.side-links{display:grid;gap:10px}.side-links a{padding:10px 12px;border-radius:10px;color:#475467}.side-links a:hover{background:var(--primary-soft);color:var(--primary)}
footer{margin-top:52px;background:#fff;border-top:1px solid var(--line)}.footer-inner{min-height:150px;display:flex;align-items:center;justify-content:space-between;gap:28px;color:var(--muted);font-size:13px}
.footer-title{font-size:16px;font-weight:800;color:var(--text);margin-bottom:8px}.footer-right{text-align:right}.beian{color:#667085}.beian:hover{color:var(--primary)}
@media(max-width:900px){.hero-grid,.guide,.content-wrap{grid-template-columns:1fr}.hero-side{grid-template-columns:1fr 1fr;grid-template-rows:auto}.categories{grid-template-columns:repeat(2,1fr)}.articles{grid-template-columns:repeat(2,1fr)}.side-card{position:static}}
@media(max-width:640px){.container{width:min(calc(100% - 28px),var(--container))}.nav{height:62px}.nav-links{display:none}.brand{font-size:18px}.brand-mark{width:36px;height:36px}.hero{padding:30px 0 24px}.hero-main{padding:34px 26px;border-radius:22px}h1{font-size:40px}.hero-desc{font-size:15px}.hero-side,.categories,.articles{grid-template-columns:1fr}section{padding:28px 0}.section-head{align-items:flex-start;flex-direction:column}.section-head h2{font-size:26px}.feature-card,.category-card,.guide-panel,.notice,.content-card{padding:24px}.page-hero{padding-top:30px}.page-hero-card{padding:30px 24px}.page-hero h1{font-size:34px}.footer-inner{padding:34px 0;align-items:flex-start;flex-direction:column}.footer-right{text-align:left}}