:root{
  --blue:#3f8fe5;--blue-dark:#2875c7;--blue-soft:#eaf4ff;--ink:#1f2d3d;
  --text:#34495e;--muted:#6f7f90;--line:#d8e4f0;--light:#f4f7fb;--lighter:#eef3f9;
  --shadow:0 12px 32px rgba(43,97,153,.10);--radius:14px;--max:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--text);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:#2f83d8;text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%;height:auto}
button,input,textarea,select{font:inherit}
.skip-link{position:fixed;left:16px;top:-80px;z-index:12000;padding:10px 16px;background:#fff;border:2px solid var(--blue);border-radius:8px;color:var(--ink)}
.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;width:100%;z-index:9999;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid #e5edf5;box-shadow:0 6px 20px rgba(43,97,153,.08)}
.header-inner{max-width:var(--max);min-height:70px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.site-logo{display:inline-flex;align-items:center;flex:0 0 auto}.site-logo img{display:block;max-height:44px;width:auto}
.nav-core{display:flex;align-items:center;justify-content:center;gap:8px;min-width:0}.nav-core a{color:var(--text);padding:8px 10px;border-radius:8px;white-space:nowrap;font-size:15px}.nav-core a:hover,.nav-core a.active{color:var(--blue-dark);background:var(--blue-soft)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.main-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;color:#fff;background:var(--blue);border-radius:9px;text-decoration:none;box-shadow:0 10px 24px rgba(63,143,229,.22);position:relative;z-index:2;pointer-events:auto;touch-action:manipulation;font-weight:700;border:1px solid transparent;transition:.2s ease}
.main-btn:hover{background:#2f7fd3;transform:translateY(-1px);color:#fff}.main-btn:focus-visible,.menu-toggle:focus-visible,.drawer-close:focus-visible,a:focus-visible{outline:3px solid rgba(40,117,199,.35);outline-offset:3px}
.menu-toggle{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:9px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;position:relative;z-index:2}.menu-toggle span{width:20px;height:2px;background:var(--ink);border-radius:2px}
.drawer-overlay{position:fixed;inset:0;z-index:10000;background:rgba(22,42,64,.35);opacity:0;transition:.2s}.drawer-overlay.show{opacity:1}
.drawer{position:fixed;right:0;top:0;bottom:0;width:min(390px,90vw);z-index:10001;background:#fff;box-shadow:-18px 0 48px rgba(20,54,91,.18);transform:translateX(102%);transition:transform .25s ease;padding:20px;overflow-y:auto}.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid #e5edf5}.drawer-logo img{max-height:42px}.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:30px;line-height:1;cursor:pointer;color:var(--ink)}
.drawer-nav{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:18px 0}.drawer-nav a{display:flex;align-items:center;min-height:44px;padding:9px 12px;border-radius:8px;color:var(--text);background:var(--light)}.drawer-nav a:hover,.drawer-nav a.active{color:var(--blue-dark);background:var(--blue-soft)}.drawer-download{width:100%}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}.narrow{width:min(900px,calc(100% - 40px));margin:0 auto}
.section{padding:84px 0}.section-sm{padding:58px 0}.section-light{background:var(--light)}.section-blue-soft{background:linear-gradient(180deg,#f8fbff 0%,#edf5fd 100%)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:10px;color:var(--blue-dark);font-weight:700;letter-spacing:.04em}.eyebrow:before{content:"";width:28px;height:2px;background:var(--blue)}
h1,h2,h3,.section-title{color:var(--ink);line-height:1.28;margin-top:0}h1{font-size:clamp(38px,5vw,64px);margin-bottom:20px;letter-spacing:-.02em}h2{font-size:clamp(28px,3.2vw,42px);margin-bottom:18px}h3{font-size:21px;margin-bottom:10px}
p{margin:0 0 18px}.lead{font-size:clamp(18px,2vw,22px);color:#4d647b;max-width:760px}.muted{color:var(--muted)}
.hero{position:relative;overflow:hidden;padding:78px 0 68px;background:#fff}.hero:before,.hero:after{content:"";position:absolute;border-radius:999px;filter:blur(1px);pointer-events:none}.hero:before{width:420px;height:420px;background:#edf6ff;right:-120px;top:-100px}.hero:after{width:260px;height:260px;border:40px solid #f4f8fc;left:-150px;bottom:-140px}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.06fr .94fr;align-items:center;gap:64px}.hero-copy p{max-width:720px}.hero-subtitle{font-size:clamp(21px,2.4vw,30px);font-weight:700;color:var(--blue-dark);margin-bottom:18px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 20px}.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border:1px solid var(--blue);border-radius:9px;color:var(--blue-dark);font-weight:700;background:#fff;transition:.2s}.secondary-btn:hover{background:var(--blue-soft);transform:translateY(-1px)}
.hero-links{display:flex;flex-wrap:wrap;gap:18px;margin-top:18px}.hero-links a{font-weight:700}.hero-points{display:flex;flex-wrap:wrap;gap:9px 18px;margin-top:24px;color:#52697f;font-size:14px}.hero-points span:before{content:"✓";color:var(--blue-dark);font-weight:800;margin-right:6px}.hero-visual{display:flex;justify-content:center;align-items:center}.hero-visual img{display:block;max-width:100%;height:auto;object-fit:contain;filter:drop-shadow(0 30px 38px rgba(42,96,149,.14))}
.info-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.info-card,.review-card,.faq-card,.content-card,.category-card{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 24px rgba(43,97,153,.06)}.info-card{padding:26px}.info-card strong{display:block;color:var(--blue-dark);font-size:19px;margin-bottom:8px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}.section-head p{max-width:650px;color:var(--muted);margin-bottom:0}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.category-card{padding:28px;display:flex;flex-direction:column;min-height:210px;transition:.2s;border-color:#c7dbef}.category-card:hover{border-color:var(--blue);transform:translateY(-4px)}.category-card h3{color:var(--blue-dark)}.category-card p{color:var(--muted);flex:1}.category-card .text-link{font-weight:700}.category-card.wide{grid-column:1/-1;min-height:auto;display:grid;grid-template-columns:230px 1fr auto;align-items:center;gap:24px}.category-card.wide p{margin:0}
.feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px}.feature.reverse .feature-image{order:2}.feature-image{display:flex;justify-content:center}.feature-image img,.content-img{max-width:100%;height:auto;object-fit:contain;display:block}.feature-copy ul,.article-content ul{padding-left:20px}.feature-copy li,.article-content li{margin-bottom:8px}.check-list{list-style:none;padding:0!important;margin:22px 0}.check-list li{position:relative;padding-left:28px;margin-bottom:10px}.check-list li:before{content:"";position:absolute;left:0;top:.65em;width:14px;height:14px;border-radius:50%;background:var(--blue-soft);border:4px solid var(--blue)}
.dual-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.content-card{padding:32px}.content-card img{max-height:260px;margin:0 auto 24px}.content-card p:last-child{margin-bottom:0}
.notice-box,.risk-box,.tip-box{padding:22px 24px;border-radius:10px;margin:24px 0}.notice-box{background:#edf6ff;border-left:4px solid var(--blue)}.risk-box{background:#fff7ed;border-left:4px solid #d9842d;color:#5c4530}.tip-box{background:#f2f8f5;border-left:4px solid #4b9b73;color:#355b49}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.review-card{padding:26px}.review-card p{margin:0}.review-name{display:block;margin-top:14px;color:var(--blue-dark);font-weight:700}
.faq-list{display:grid;gap:14px}.faq-card{padding:0;overflow:hidden}.faq-card details{padding:0}.faq-card summary{cursor:pointer;list-style:none;padding:21px 24px;color:var(--ink);font-weight:700;position:relative;padding-right:56px}.faq-card summary::-webkit-details-marker{display:none}.faq-card summary:after{content:"+";position:absolute;right:22px;top:13px;font-size:28px;color:var(--blue)}.faq-card details[open] summary:after{content:"−"}.faq-card .answer{padding:0 24px 22px;color:var(--muted)}
.page-hero{padding:68px 0 58px;background:linear-gradient(180deg,#f7fbff,#eef5fc)}.page-hero .lead{max-width:850px}.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:16px}.breadcrumb a{color:var(--blue-dark)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}.article-content{font-size:17px}.article-content h2{margin-top:46px;font-size:32px}.article-content h3{margin-top:30px}.article-content p{margin-bottom:18px}.article-content table{width:100%;border-collapse:collapse;margin:24px 0;display:block;overflow-x:auto}.article-content th,.article-content td{border:1px solid var(--line);padding:13px 14px;text-align:left;min-width:150px}.article-content th{background:var(--light);color:var(--ink)}
.side-nav{position:sticky;top:96px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:0 8px 24px rgba(43,97,153,.06)}.side-nav h2{font-size:20px;margin-bottom:12px}.side-nav a{display:block;padding:8px 0;border-bottom:1px solid #edf2f7;color:var(--text)}.side-nav a:last-child{border-bottom:0}.side-nav a:hover{color:var(--blue-dark)}
.steps{counter-reset:step;display:grid;gap:18px}.step{position:relative;padding:24px 24px 24px 74px;background:#fff;border:1px solid var(--line);border-radius:12px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:22px;top:22px;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:700}.step h3{margin-bottom:6px}.step p:last-child{margin-bottom:0}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.tag{display:inline-flex;padding:6px 12px;border-radius:999px;background:var(--blue-soft);color:var(--blue-dark);font-size:14px;font-weight:700}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.news-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:12px}.news-meta{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14px;margin-bottom:10px}.news-card h2{font-size:24px}.news-card p:last-child{margin-bottom:0}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.contact-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:12px}.contact-card h2{font-size:23px}.contact-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.contact-flow div{padding:20px;background:#fff;border:1px solid var(--line);border-radius:10px;text-align:center}.contact-flow strong{display:block;color:var(--blue-dark);margin-bottom:6px}
.cta-band{padding:34px;border-radius:16px;background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;display:flex;align-items:center;justify-content:space-between;gap:24px}.cta-band h2{color:#fff;margin-bottom:8px}.cta-band p{margin:0;max-width:760px}.cta-band .main-btn{background:#fff;color:var(--blue-dark);box-shadow:none}.cta-band .main-btn:hover{background:#eef6ff}
.site-footer{background:#438ddf;color:#fff}.footer-inner{width:min(var(--max),calc(100% - 40px));margin:0 auto;padding:58px 0 38px;display:grid;grid-template-columns:1.1fr 1.9fr;gap:60px}.footer-brand p{max-width:440px;color:rgba(255,255,255,.86)}.footer-logo{display:inline-flex;background:#fff;border-radius:9px;padding:8px 12px;margin-bottom:18px}.footer-logo img{max-height:38px;width:auto}.footer-download{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border:1px solid rgba(255,255,255,.65);border-radius:8px;color:#fff;font-weight:700}.footer-download:hover{background:rgba(255,255,255,.12)}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.footer-links h2{font-size:17px;color:#fff;margin-bottom:12px}.footer-links a{display:block;color:rgba(255,255,255,.88);padding:5px 0}.footer-links a:hover{color:#fff;text-decoration:underline}.footer-risk{border-top:1px solid rgba(255,255,255,.2);border-bottom:1px solid rgba(255,255,255,.2);padding:18px max(20px,calc((100% - var(--max))/2));color:rgba(255,255,255,.88);font-size:14px}.footer-bottom{text-align:center;padding:18px 20px;color:rgba(255,255,255,.78);font-size:14px}
@media (max-width:1050px){.nav-core{gap:1px}.nav-core a{font-size:14px;padding:8px 7px}.header-download{padding:0 16px}.hero-grid{gap:34px}.info-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.side-nav{position:relative;top:auto}.contact-flow{grid-template-columns:repeat(2,1fr)}}
@media (max-width:768px){
  .header-inner{min-height:62px;padding:0 14px;gap:8px}.site-logo img{max-height:36px}.nav-core{display:none}.header-actions{gap:7px}.header-download{min-height:44px;padding:0 13px;font-size:14px}.menu-toggle{display:flex}
  .container,.narrow{width:min(100% - 32px,var(--max))}.section{padding:62px 0}.section-sm{padding:44px 0}.hero{padding:54px 0 48px}.hero-grid,.feature{grid-template-columns:1fr;gap:34px}.hero-copy{text-align:left}.hero-visual{order:2}.hero-visual img{max-height:520px}.feature.reverse .feature-image{order:0}.hero-actions{align-items:stretch}.hero-actions .main-btn,.hero-actions .secondary-btn{flex:1 1 180px}.info-grid,.category-grid,.dual-grid,.review-grid,.news-grid,.contact-grid{grid-template-columns:1fr}.category-grid{gap:18px}.category-card{min-height:auto}.category-card.wide{grid-column:auto;display:flex;align-items:flex-start;gap:0}.section-head{align-items:flex-start;flex-direction:column;margin-bottom:26px}.review-grid{gap:14px}.article-content{font-size:16px}.article-content h2{font-size:28px;margin-top:38px}.footer-inner{grid-template-columns:1fr;gap:34px;padding-top:44px}.footer-links{grid-template-columns:repeat(2,1fr)}.cta-band{align-items:flex-start;flex-direction:column}.drawer-nav{grid-template-columns:1fr}.contact-flow{grid-template-columns:1fr 1fr}
}
@media (max-width:430px){.site-logo img{max-width:120px}.header-download{padding:0 11px}.hero-actions .main-btn,.hero-actions .secondary-btn{width:100%;flex-basis:100%}.footer-links{grid-template-columns:1fr}.contact-flow{grid-template-columns:1fr}.drawer{padding:16px}.page-hero{padding:50px 0 44px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}