:root{--red:#c90000;--dark:#a80000;--ink:#1f2329;--muted:#5d6673;--light:#f6f7f9;--line:rgba(201,0,0,.12);--shadow:0 12px 30px rgba(18,28,45,.08);--radius:18px;--head:76px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.75}body.drawer-open{overflow:hidden}a{text-decoration:none;color:inherit}img{max-width:100%}button{font:inherit}
.site-header{position:fixed;inset:0 0 auto;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(201,0,0,.08)}
.header-inner{width:min(1480px,calc(100% - 32px));min-height:var(--head);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo img{display:block;max-height:52px;width:auto}.core-nav{display:flex;align-items:center;justify-content:center;gap:10px;white-space:nowrap;flex:1}.core-nav a{padding:9px 16px;border-radius:999px;background:var(--light)}.core-nav a:hover,.core-nav a.active{color:var(--red);background:rgba(201,0,0,.08)}
.main-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 24px;border-radius:999px;background:linear-gradient(180deg,#f12b2b 0%,#c90000 55%,#a80000 100%);color:#fff;font-weight:700;box-shadow:0 8px 18px rgba(201,0,0,.22)}.register-btn{flex:0 0 auto}
.menu-btn{display:none;width:42px;height:42px;border:0;border-radius:12px;background:var(--light);padding:9px}.menu-btn span{display:block;height:2px;background:var(--ink);margin:5px 0}
.site-shell{width:min(1500px,calc(100% - 32px));margin:auto;padding-top:calc(var(--head) + 20px);display:grid;grid-template-columns:210px minmax(0,1fr);gap:28px}.site-main{min-width:0}
.side-nav{position:sticky;top:calc(var(--head) + 18px);align-self:start;max-height:calc(100vh - var(--head) - 36px);overflow:auto;background:#fff;border:1px solid rgba(201,0,0,.1);border-radius:18px;box-shadow:var(--shadow);padding:16px}.side-nav strong{display:block;color:var(--red);padding:4px 10px 11px}.side-nav nav{display:grid;gap:4px}.side-nav a{padding:7px 10px;border-radius:12px;font-size:14px}.side-nav a:hover,.side-nav a.active{color:var(--red);background:rgba(201,0,0,.08)}
.page-wrap,.home-wrap{width:min(1180px,100%);margin:0 auto 54px}.page-hero{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:34px;padding:34px;margin-bottom:28px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(135deg,#fff,#f7f8fa 55%,#fff1f1);box-shadow:var(--shadow)}.page-hero h1{margin:0 0 16px;color:var(--red);font-size:clamp(30px,4vw,48px);line-height:1.25}.page-hero p{margin:0 0 20px;color:var(--muted)}.eyebrow{display:inline-flex;margin-bottom:14px;padding:5px 11px;border-radius:999px;background:rgba(201,0,0,.08);color:var(--red);font-weight:800;font-size:13px}.hero-image{min-height:240px;max-height:300px;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:18px;background:#f7f8fa}.hero-image img{width:100%;max-height:300px;object-fit:contain}
.tags{display:flex;flex-wrap:wrap;gap:10px}.tag{padding:7px 12px;border-radius:999px;background:rgba(201,0,0,.08);color:var(--red);font-size:14px;font-weight:700}
.section{margin:28px 0;padding:30px;border-radius:22px;background:#fff;border:1px solid rgba(201,0,0,.08);box-shadow:var(--shadow)}.section.alt{background:var(--light);box-shadow:none}.section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:20px}.section-title{margin:0;color:var(--red);font-size:clamp(24px,3vw,34px);line-height:1.3}.section-desc{margin:6px 0 0;color:var(--muted);max-width:760px}.text-link{color:var(--red);font-weight:700;white-space:nowrap}
.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid-5{grid-template-columns:repeat(5,minmax(0,1fr))}
.card,.review,.faq-item{background:#fff;border:1px solid rgba(201,0,0,.1);box-shadow:var(--shadow);border-radius:18px}.card,.review{padding:22px}.card h3{margin:0 0 9px;color:var(--red)}.card p,.review p{margin:0;color:var(--muted)}.card .text-link{display:inline-flex;margin-top:12px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center}.split.reverse .media{order:2}.media{min-height:220px;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:18px;background:#f7f8fa}.media img{width:100%;max-height:280px;object-fit:contain}.clean-list{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}.clean-list li{position:relative;padding-left:22px;color:var(--muted)}.clean-list li:before{content:"";position:absolute;left:0;top:.75em;width:8px;height:8px;border-radius:50%;background:var(--red)}
.review{position:relative}.review:before{content:"“";position:absolute;right:18px;top:5px;color:rgba(201,0,0,.12);font:52px/1 Georgia}.review strong{display:block;margin-top:13px;color:var(--red)}
.faq-list{display:grid;gap:12px}.faq-item{overflow:hidden}.faq-item details{padding:0 20px}.faq-item summary{position:relative;padding:18px 28px 18px 0;font-weight:800;cursor:pointer;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";position:absolute;right:2px;top:13px;color:var(--red);font-size:24px}.faq-item details[open] summary:after{content:"−"}.faq-item p{margin:0;padding:0 0 18px;color:var(--muted)}
.notice{padding:20px 22px;border:1px solid var(--line);border-radius:18px;background:#fff7f7;color:#5f4242}.notice strong{color:var(--red)}.cta{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(135deg,#fff4f4,#fff)}.cta h2{margin:0 0 7px;color:var(--red)}.cta p{margin:0;color:var(--muted)}
.banner-slider{position:relative;width:min(1180px,100%);aspect-ratio:16/5;min-height:260px;max-height:360px;margin:4px auto 30px;overflow:hidden;border-radius:22px;background:#f7f8fa;box-shadow:var(--shadow)}.banner-track,.banner-slide{width:100%;height:100%}.banner-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .45s}.banner-slide.active{opacity:1;visibility:visible}.banner-slide img{display:block;width:100%;height:100%;object-fit:contain;background:#f7f8fa}
.slider-arrow{position:absolute;top:50%;z-index:2;width:44px;height:44px;margin-top:-22px;border:0;border-radius:50%;background:rgba(255,255,255,.92);box-shadow:0 6px 18px rgba(18,28,45,.15);cursor:pointer}.slider-arrow:before{content:"";position:absolute;top:14px;width:12px;height:12px;border-top:3px solid var(--red);border-left:3px solid var(--red)}.slider-prev{left:16px}.slider-next{right:16px}.slider-prev:before{left:17px;transform:rotate(-45deg)}.slider-next:before{right:17px;transform:rotate(135deg)}.slider-dots{position:absolute;left:50%;bottom:14px;z-index:2;display:flex;gap:8px;transform:translateX(-50%)}.slider-dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;background:rgba(255,255,255,.75)}.slider-dot.active{width:24px;border-radius:999px;background:var(--red)}
.service-summary{padding:26px;border-radius:22px;background:linear-gradient(135deg,#d90b0b,#a80000);color:#fff;box-shadow:0 14px 32px rgba(201,0,0,.2)}.summary-item{padding:17px;border:1px solid rgba(255,255,255,.18);border-radius:16px;background:rgba(255,255,255,.1)}.summary-item strong{display:block;margin-bottom:6px}.summary-item p{margin:0;color:rgba(255,255,255,.88);font-size:14px}
.product-scroll{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(220px,1fr);gap:16px;overflow-x:auto;padding:2px 2px 12px}.product-card{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:#fff}.product-card img{display:block;width:100%;height:170px;object-fit:contain;background:#f7f8fa}.product-card div{padding:16px}.product-card h3{margin:0 0 8px;color:var(--red)}.product-card p{margin:0;color:var(--muted);font-size:14px}
.site-footer{margin-top:40px;padding:50px 24px 24px;background:#11151c;color:#e7ecf3}.footer-grid{width:min(1180px,100%);margin:auto;display:grid;grid-template-columns:1.7fr repeat(3,1fr);gap:34px}.footer-grid h2{margin:0 0 14px;color:#fff;font-size:17px}.footer-grid a{display:block;margin:7px 0;color:#cbd2dc}.footer-brand p{margin:14px 0 0;color:#b9c2ce}.footer-logo img{max-height:50px;width:auto}.footer-notice,.copyright{width:min(1180px,100%);margin:28px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);color:#adb6c3;font-size:13px}.copyright{margin-top:14px;padding-top:14px;text-align:center}
.mobile-drawer{position:fixed;inset:0 auto 0 0;z-index:1200;width:min(84vw,320px);overflow-y:auto;background:#fff;box-shadow:20px 0 40px rgba(18,28,45,.16);transform:translateX(-105%);transition:.24s}.mobile-drawer.open{transform:translateX(0)}.drawer-mask{position:fixed;inset:0;z-index:1150;background:rgba(17,21,28,.5);opacity:0;transition:.22s}.drawer-mask.show{opacity:1}.drawer-head{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:#fff;border-bottom:1px solid #eceff3}.drawer-logo img{max-height:44px;width:auto}.drawer-close{width:40px;height:40px;border:0;border-radius:12px;background:var(--light);font-size:28px}.mobile-drawer nav{display:grid;gap:5px;padding:12px}.mobile-drawer nav a{padding:10px 12px;border-radius:12px}.mobile-drawer nav a.active,.mobile-drawer nav a:hover{color:var(--red);background:rgba(201,0,0,.08)}.mobile-bottom{display:none}
@media(max-width:1020px){:root{--head:68px}.header-inner{width:min(100% - 22px,960px);gap:12px}.core-nav,.side-nav{display:none}.menu-btn{display:block}.logo{margin-right:auto}.logo img{max-height:44px}.register-btn{min-height:40px;padding:0 18px}.site-shell{width:min(100% - 24px,960px);display:block;padding-top:calc(var(--head) + 16px)}.page-hero{grid-template-columns:1fr}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-4,.grid-5{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){body{padding-bottom:66px}.site-shell{width:min(100% - 18px,680px);padding-top:calc(var(--head) + 10px)}.page-hero{padding:22px;gap:22px;border-radius:18px}.page-hero h1{font-size:30px}.hero-image{min-height:180px;max-height:220px}.hero-image img{max-height:220px}.banner-slider{min-height:150px;max-height:210px;aspect-ratio:16/7;border-radius:16px}.slider-arrow{width:36px;height:36px;margin-top:-18px}.slider-arrow:before{top:11px;width:10px;height:10px}.slider-prev{left:8px}.slider-next{right:8px}.slider-prev:before{left:14px}.slider-next:before{right:14px}.section{padding:22px 18px;border-radius:18px}.section-head{align-items:start;flex-direction:column}.grid-2,.grid-3,.grid-4,.grid-5{grid-template-columns:1fr}.split,.split.reverse{grid-template-columns:1fr}.split.reverse .media{order:initial}.media{min-height:180px}.media img{max-height:220px}.product-card img{height:150px}.cta{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr}.site-footer{padding:38px 18px 22px}.mobile-bottom{position:fixed;inset:auto 0 0;z-index:1100;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid #e5e8ed;box-shadow:0 -8px 24px rgba(18,28,45,.08)}.mobile-bottom a{min-height:62px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#6b7380;font-size:12px}.mobile-bottom a b{font-size:20px;line-height:1}.mobile-bottom a.active{color:var(--red)}}
@media(max-width:420px){.header-inner{width:calc(100% - 14px)}.logo img{max-width:120px;max-height:40px}.register-btn{padding:0 15px}.page-hero{padding:18px}}