/* roulang page: index */
:root{
  --primary:#0F6FE0;
  --primary-hover:#2E84E8;
  --primary-press:#0A5CBD;
  --primary-soft:rgba(15,111,224,.10);
  --accent:#FF7A2F;
  --accent-hover:#FF8D4D;
  --accent-press:#E9621A;
  --accent-soft:rgba(255,122,47,.12);
  --success:#16A34A;
  --danger:#E5484D;
  --bg:#F4F7FB;
  --alt:#EAF1FA;
  --card:#FFFFFF;
  --text:#12233A;
  --muted:#5A6B7D;
  --weak:#93A1B0;
  --border:#E4EAF2;
  --border-strong:#C9D8EA;
  --r-card:16px;
  --r-btn:10px;
  --r-lg:20px;
  --shadow-card:0 1px 2px rgba(16,42,67,.05),0 10px 28px rgba(16,42,67,.07);
  --shadow-hover:0 6px 14px rgba(16,42,67,.08),0 18px 40px rgba(16,42,67,.10);
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color .18s ease}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.2px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:99}
.skip-link:focus{left:0}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-tight{padding:64px 0}
.section-alt{background:var(--alt)}
.section-white{background:#fff}
.stripes{background-color:var(--alt);background-image:repeating-linear-gradient(135deg,rgba(15,111,224,.055) 0 2px,transparent 2px 16px)}
.section-head{margin-bottom:34px}
.section-head h2{font-size:clamp(23px,2.4vw,30px)}
.section-head p{color:var(--muted);margin-top:10px;max-width:680px;font-size:15px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:34px}
.section-head-row .section-head{margin-bottom:0}
.more-link{font-size:15px;font-weight:500;display:inline-flex;align-items:center;gap:6px}
.more-link:hover{color:var(--accent)}
.more-link::after{content:"→";transition:transform .18s ease}
.more-link:hover::after{transform:translateX(3px)}

/* ============ Header / Nav ============ */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border);transition:background .25s ease,box-shadow .25s ease}
.site-header.is-scrolled{background:rgba(255,255,255,.94);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(16,42,67,.08)}
.header-top-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:58px;transition:height .25s ease}
.site-header.is-scrolled .header-top-inner{height:44px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);flex:none}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700;letter-spacing:.5px;flex:none;transition:width .25s ease,height .25s ease}
.site-header.is-scrolled .brand-mark{width:30px;height:30px;font-size:12px}
.brand-text{font-size:15px;font-weight:700;letter-spacing:.2px;white-space:nowrap}
.brand:hover .brand-text{color:var(--primary)}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:0 14px;height:38px;width:230px;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}
.search-box:focus-within{background:#fff;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,111,224,.28)}
.search-box svg{width:16px;height:16px;flex:none;fill:none;stroke:var(--weak);stroke-width:2}
.search-box input{border:0;background:transparent;outline:none;width:100%;height:100%;font-size:14px}
.search-box input::placeholder{color:var(--weak)}
.hamburger{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.hamburger span{display:block;width:17px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease}
.hamburger:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px}
.header-nav{border-top:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:42px;transition:height .25s ease;overflow:hidden}
.site-header.is-scrolled .nav-inner{height:32px}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-link{display:flex;align-items:center;height:100%;padding:0 14px;font-size:14px;color:var(--muted);border-radius:8px;position:relative;font-weight:500}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link.is-active{color:var(--text);font-weight:700}
.nav-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:3px;background:var(--primary)}
.nav-hot{display:flex;align-items:center;gap:8px}
.hot-pill{font-size:12px;line-height:1;padding:6px 11px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-weight:500;transition:background .18s ease,color .18s ease}
.hot-pill:hover{background:var(--primary);color:#fff}
.hot-pill.is-accent{background:var(--accent-soft);color:var(--accent-press)}
.hot-pill.is-accent:hover{background:var(--accent);color:#fff}

/* ============ Drawer ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(18,35,58,.42);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:60}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;height:100%;width:300px;max-width:86vw;background:#fff;z-index:61;transform:translateX(100%);transition:transform .28s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;padding:18px 20px 24px;overflow-y:auto}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--border)}
.drawer-close{width:34px;height:34px;border-radius:10px;border:1px solid var(--border);font-size:16px;color:var(--muted);display:grid;place-items:center}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:16px 0}
.drawer-nav a{padding:12px 14px;border-radius:10px;font-size:15px;color:var(--text);font-weight:500}
.drawer-nav a:hover{background:var(--primary-soft);color:var(--primary)}
.drawer-nav a.is-active{background:var(--primary-soft);color:var(--primary);font-weight:700}
.drawer-search{width:100%;margin-bottom:16px}
.drawer-hot{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.drawer-label{font-size:13px;color:var(--weak);margin-bottom:10px}

/* ============ Buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:500;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 8px 18px rgba(15,111,224,.24)}
.btn-primary:active{transform:translateY(0);background:var(--primary-press);box-shadow:none}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 8px 18px rgba(255,122,47,.26)}
.btn-accent:active{transform:translateY(0);background:var(--accent-press);box-shadow:none}
.btn-outline{background:#fff;border-color:var(--border-strong);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-outline:active{background:var(--primary-soft)}
.btn-sm{height:36px;padding:0 14px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none !important;box-shadow:none !important}

/* ============ Hero ============ */
.hero{position:relative;background:var(--alt) url('/assets/images/backpic/back-1.webp') center/cover no-repeat;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:rgba(255,255,255,.90)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center;padding:72px 0 78px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-soft);border-radius:999px;padding:6px 14px;margin-bottom:18px;letter-spacing:.3px}
.hero h1{font-size:clamp(30px,4vw,46px);line-height:1.25;font-weight:700;letter-spacing:.4px}
.hero-sub{margin-top:16px;font-size:17px;line-height:1.8;color:var(--muted);max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-meta{margin-top:22px;font-size:14px;color:var(--weak);letter-spacing:.2px}
.hero-meta .dot{margin:0 8px;color:#C6D3E1}
.hero-shot{position:relative}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--shadow-hover);background:#EEF3F9;transform:rotate(-1.6deg)}
.hero-badge{position:absolute;left:-14px;bottom:26px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-card);padding:12px 18px;display:flex;align-items:center;gap:10px}
.hero-badge strong{display:block;font-size:15px;line-height:1.4}
.hero-badge span{font-size:12px;color:var(--weak)}
.status-dot{width:9px;height:9px;border-radius:50%;background:var(--success);flex:none;box-shadow:0 0 0 3px rgba(22,163,74,.16)}

/* ============ Shot rail ============ */
.rail-wrap{position:relative}
.shot-rail{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 4px 22px;scrollbar-width:thin;scrollbar-color:#C7D6E6 transparent}
.shot-rail::-webkit-scrollbar{height:6px}
.shot-rail::-webkit-scrollbar-thumb{background:#C7D6E6;border-radius:6px}
.shot-card{flex:0 0 280px;scroll-snap-align:start;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .2s ease,box-shadow .2s ease}
.shot-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.shot-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#EEF3F9;transition:transform .3s ease}
.shot-card:hover img{transform:scale(1.02)}
.shot-body{padding:16px 18px 20px}
.shot-body h3{font-size:16px;font-weight:600}
.shot-body p{font-size:13px;line-height:1.7;color:var(--muted);margin-top:6px}
.rail-nav{display:flex;justify-content:flex-end;gap:10px;margin-bottom:6px}
.rail-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--border-strong);background:#fff;display:grid;place-items:center;font-size:16px;color:var(--muted);transition:all .18s ease}
.rail-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.rail-btn:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px}
.rail-dots{display:flex;gap:7px;justify-content:center;margin-top:6px}
.rail-dot{width:8px;height:8px;border-radius:50%;background:#CBD9E8;transition:all .2s ease}
.rail-dot.is-on{background:var(--primary);width:22px;border-radius:99px}

/* ============ Value rows ============ */
.value-list{display:flex;flex-direction:column;gap:14px}
.value-row{display:flex;align-items:center;gap:38px;padding:32px 34px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-card);transition:box-shadow .2s ease,transform .2s ease}
.value-row:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.value-row.reverse{flex-direction:row-reverse;text-align:right}
.value-num{font-size:46px;line-height:1;font-weight:800;color:rgba(15,111,224,.15);flex:none;letter-spacing:-1px}
.value-row h3{font-size:20px;font-weight:600;margin-bottom:8px}
.value-row p{font-size:15px;line-height:1.8;color:var(--muted);margin:0;max-width:640px}

/* ============ Specs ============ */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.spec-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:26px 26px 24px;box-shadow:var(--shadow-card);transition:box-shadow .2s ease}
.spec-card:hover{box-shadow:var(--shadow-hover)}
.spec-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:6px}
.spec-head h3{font-size:18px;font-weight:700}
.badge{display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:6px 11px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-weight:600;white-space:nowrap}
.badge.is-ok{background:rgba(22,163,74,.12);color:var(--success)}
.badge.is-warn{background:rgba(229,72,77,.10);color:var(--danger)}
.badge.is-accent{background:var(--accent-soft);color:var(--accent-press)}
.spec-list{margin-top:14px}
.spec-list div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px dashed var(--border)}
.spec-list div:last-child{border-bottom:0}
.spec-list dt{font-size:14px;color:var(--weak)}
.spec-list dd{margin:0;font-size:14px;font-weight:600;text-align:right}
.spec-note{margin-top:14px;font-size:13px;color:var(--weak)}

/* ============ Reviews ============ */
.review-wall{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.review-col{display:flex;flex-direction:column;gap:22px}
.review-col:nth-child(2){padding-top:38px}
.review-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:22px 24px;box-shadow:var(--shadow-card);transition:box-shadow .2s ease,transform .2s ease}
.review-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.stars{color:var(--accent);font-size:14px;letter-spacing:2px;margin-bottom:10px}
.review-card p{font-size:15px;line-height:1.8;color:var(--text);margin:0 0 14px}
.review-user{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--weak)}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-size:13px;font-weight:700;flex:none}

/* ============ Downloads ============ */
.dl-group{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.dl-btn{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:18px 22px;border-radius:14px;border:1px solid var(--border-strong);background:#fff;text-align:left;transition:all .18s ease}
.dl-btn strong{font-size:16px;font-weight:600;color:var(--text)}
.dl-btn span{font-size:12.5px;color:var(--weak)}
.dl-btn:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--shadow-card)}
.dl-btn:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px}
.dl-btn.is-main{background:var(--accent);border-color:var(--accent);color:#fff}
.dl-btn.is-main strong{color:#fff}
.dl-btn.is-main span{color:rgba(255,255,255,.85)}
.dl-btn.is-main:hover{background:var(--accent-hover);border-color:var(--accent-hover);box-shadow:0 10px 24px rgba(255,122,47,.28)}
.dl-aside{display:flex;align-items:center;gap:20px;margin-top:26px;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:20px 24px;box-shadow:var(--shadow-card)}
.qr-box{width:120px;height:120px;border:1px solid var(--border);border-radius:12px;background:#EEF3F9;display:grid;place-items:center;flex:none;color:var(--weak);font-size:12px;text-align:center;line-height:1.5;padding:8px}
.dl-aside h4{font-size:16px;font-weight:600;margin-bottom:6px}
.dl-aside p{font-size:14px;color:var(--muted);margin:0}

/* ============ News / CMS ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.news-thumb{display:block;background:#EEF3F9}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease}
.news-card:hover .news-thumb img{transform:scale(1.02)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-body .badge{align-self:flex-start;margin-bottom:12px}
.news-title{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:10px}
.news-title a{color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title a:hover{color:var(--primary);text-decoration:underline}
.news-summary{font-size:14px;line-height:1.7;color:var(--muted);margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;font-size:13px;color:var(--weak);display:flex;align-items:center;gap:8px}
.news-meta::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--border-strong);flex:none}
.empty-state{grid-column:1/-1;background:#fff;border:1px dashed var(--border-strong);border-radius:var(--r-card);padding:52px 24px;text-align:center}
.empty-state .empty-icon{width:80px;height:80px;margin:0 auto 16px;border-radius:50%;background:var(--alt);display:grid;place-items:center}
.empty-state .empty-icon svg{width:34px;height:34px;stroke:var(--weak);fill:none;stroke-width:1.6}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:16px}
.quick-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;padding-top:24px;border-top:1px solid var(--border)}
.quick-links a{font-size:14px;color:var(--muted);background:#fff;border:1px solid var(--border);border-radius:999px;padding:8px 16px;transition:all .18s ease}
.quick-links a:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

/* ============ FAQ ============ */
.faq{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:last-child{border-bottom:0}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 26px;font-size:16px;font-weight:600;text-align:left;color:var(--text);transition:background .18s ease}
.faq-q:hover{background:#F8FAFD}
.faq-q:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:-3px}
.faq-plus{width:22px;height:22px;position:relative;flex:none;transition:transform .25s ease}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--primary);border-radius:2px}
.faq-plus::before{left:0;top:10px;width:22px;height:2px}
.faq-plus::after{left:10px;top:0;width:2px;height:22px}
.faq-item.is-open .faq-plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 26px 22px;font-size:15px;line-height:1.8;color:var(--muted);margin:0}
.faq-item.is-open .faq-a{max-height:420px}

/* ============ CTA ============ */
.cta-band{border-radius:var(--r-lg);padding:56px 40px;text-align:center;border:1px solid var(--border)}
.cta-band h2{font-size:clamp(23px,2.6vw,32px)}
.cta-band p{color:var(--muted);margin-top:12px;font-size:15px;max-width:620px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ============ Footer ============ */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:56px 0 24px;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{width:32px;height:32px;font-size:12px}
.footer-brand strong{font-size:15px}
.footer-desc{font-size:14px;line-height:1.8;color:var(--muted);max-width:320px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--primary)}
.footer-col p{font-size:14px;color:var(--muted);margin-bottom:8px}
.footer-bottom{margin-top:40px;padding-top:22px;border-top:1px solid var(--border);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--weak)}
.footer-bottom a{color:var(--weak)}
.footer-bottom a:hover{color:var(--primary)}

/* ============ Mobile bar & back-to-top ============ */
.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:55;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);border-top:1px solid var(--border);padding:10px 16px;display:none;align-items:center;gap:14px;transform:translateY(110%);transition:transform .3s ease}
.mobile-bar.is-show{transform:translateY(0)}
.mobile-bar .btn{flex:1}
.mobile-bar small{font-size:12px;color:var(--weak);line-height:1.4;white-space:nowrap}
.to-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--primary);color:var(--primary);display:grid;place-items:center;box-shadow:var(--shadow-card);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s ease;z-index:54}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--primary);color:#fff}
.to-top:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px}

/* ============ Responsive ============ */
@media (max-width:1279px){
  .hero-inner{gap:40px;padding:60px 0 66px}
  .container{max-width:1000px}
}
@media (max-width:1023px){
  .container{max-width:100%;padding:0 20px}
  .search-box{width:180px}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:52px 0 56px}
  .hero-sub{max-width:100%}
  .hero-shot img{transform:none;aspect-ratio:16/10}
  .hero-badge{left:12px;bottom:12px}
  .spec-grid{grid-template-columns:1fr 1fr}
  .spec-grid .spec-card:last-child{grid-column:1/-1}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .dl-group{grid-template-columns:1fr 1fr}
  .dl-group .dl-btn:last-child{grid-column:1/-1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:64px 0}
}
@media (max-width:767px){
  body{font-size:15px;line-height:1.75}
  .container{padding:0 16px}
  .search-box{display:none}
  .header-nav{display:none}
  .hamburger{display:flex}
  .header-top-inner{height:56px}
  .site-header.is-scrolled .header-top-inner{height:50px}
  .brand-text{font-size:13.5px}
  .header-actions{gap:8px}
  .hero-inner{padding:40px 0 44px}
  .hero h1{font-size:clamp(26px,7vw,32px)}
  .hero-sub{font-size:15px}
  .hero-cta{gap:10px}
  .hero-cta .btn{flex:1 1 auto}
  .hero-meta{font-size:13px}
  .hero-meta .dot{display:none}
  .hero-meta span{display:block}
  .section{padding:44px 0}
  .section-head h2{font-size:22px}
  .value-row,.value-row.reverse{flex-direction:column;align-items:flex-start;text-align:left;gap:14px;padding:24px 20px}
  .value-num{font-size:36px}
  .spec-grid{grid-template-columns:1fr}
  .spec-grid .spec-card:last-child{grid-column:auto}
  .review-wall{grid-template-columns:1fr}
  .review-col:nth-child(2){padding-top:0}
  .dl-group{grid-template-columns:1fr}
  .dl-group .dl-btn:last-child{grid-column:auto}
  .dl-aside{flex-direction:column;align-items:flex-start}
  .news-grid{grid-template-columns:1fr}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a p{padding:0 18px 18px}
  .cta-band{padding:38px 20px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:8px}
  .mobile-bar{display:flex}
  .to-top{right:16px;bottom:82px}
  .shot-card{flex:0 0 240px}
  .section-white .container{padding:0 16px}
}
@media (max-width:479px){
  .hero h1{font-size:25px}
  .btn{height:42px;font-size:14px;padding:0 16px}
  .btn-lg{height:48px;padding:0 20px;font-size:15px}
  .shot-card{flex:0 0 220px}
  .review-card{padding:18px}
  .news-body{padding:16px}
}

/* roulang page: article */
:root{
  --brand:#0F6FE0;
  --brand-dark:#0B57B4;
  --accent:#FF7A2F;
  --accent-dark:#E8621A;
  --ok:#16A34A;
  --warn:#E5484D;
  --bg:#F4F7FB;
  --card:#FFFFFF;
  --alt:#EAF1FA;
  --ink:#12233A;
  --ink-2:#5A6B7D;
  --ink-3:#93A1B0;
  --line:#E4EAF2;
  --line-strong:#C9D8EA;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(16,42,67,.05), 0 10px 28px rgba(16,42,67,.07);
  --shadow-hover:0 6px 14px rgba(16,42,67,.08), 0 18px 40px rgba(16,42,67,.10);
  --space:8px;
  --container:1180px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--accent);}
button,input{font-family:inherit;font-size:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;}
p{margin:0;}
:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px;border-radius:6px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.num{font-variant-numeric:tabular-nums;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;text-align:center;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(15,111,224,.22);}
.btn-primary:hover{background:#1B7BE8;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(15,111,224,.28);}
.btn-primary:active{transform:translateY(0);background:var(--brand-dark);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,122,47,.24);}
.btn-accent:hover{background:#FF8A46;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(255,122,47,.3);}
.btn-accent:active{transform:translateY(0);background:var(--accent-dark);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line-strong);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-lg{padding:15px 30px;font-size:16px;}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 标签 ============ */
.tag{display:inline-flex;align-items:center;padding:3px 12px;border-radius:999px;font-size:12px;line-height:1.9;background:rgba(15,111,224,.1);color:var(--brand);font-weight:500;}
.tag-accent{background:rgba(255,122,47,.14);color:var(--accent-dark);}
.tag-ok{background:rgba(22,163,74,.12);color:var(--ok);}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease,background .2s ease;}
.site-header.is-scrolled{background:rgba(255,255,255,.94);backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(16,42,67,.08);}
.topbar-inner{display:flex;align-items:center;gap:16px;height:72px;transition:height .2s ease;}
.site-header.is-scrolled .topbar-inner{height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,#0F6FE0,#1B7BE8);
  color:#fff;font-size:15px;font-weight:700;letter-spacing:1px;
  box-shadow:0 6px 14px rgba(15,111,224,.28);
}
.brand-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:.2px;}
.top-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.search{position:relative;display:flex;align-items:center;}
.search svg{position:absolute;left:12px;width:16px;height:16px;stroke:var(--ink-3);fill:none;stroke-width:2;pointer-events:none;}
.search input{
  width:230px;height:40px;padding:0 14px 0 36px;border-radius:var(--radius-sm);
  border:1px solid #D8E3F0;background:#F8FAFD;color:var(--ink);font-size:14px;

  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search input::placeholder{color:var(--ink-3);}
.search input:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(15,111,224,.18);}
.hamburger{display:none;width:42px;height:42px;border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:#fff;cursor:pointer;position:relative;}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto;border-radius:2px;transition:transform .2s ease,opacity .2s ease;}

.header-nav{border-top:1px solid var(--line);}
.nav-inner{display:flex;align-items:center;gap:18px;min-height:48px;}
.nav-list{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:12px 10px;font-size:14px;color:var(--ink-2);border-radius:8px;
  transition:color .16s ease,background .16s ease;
}
.nav-link:hover{color:var(--brand);background:rgba(15,111,224,.06);}
.nav-link.is-active{color:var(--ink);font-weight:700;}
.nav-link.is-active::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;height:3px;border-radius:3px;background:var(--brand);
}
.nav-hot{display:flex;align-items:center;gap:8px;margin-left:auto;flex-wrap:wrap;}
.hot-pill{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;
  font-size:12.5px;color:var(--ink-2);background:var(--alt);
  transition:background .16s ease,color .16s ease,transform .16s ease;
}
.hot-pill:hover{background:rgba(15,111,224,.12);color:var(--brand);transform:translateY(-1px);}
.hot-pill.is-accent{background:rgba(255,122,47,.14);color:var(--accent-dark);}
.hot-pill.is-accent:hover{background:var(--accent);color:#fff;}

/* 移动抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(18,35,58,.45);opacity:0;visibility:hidden;transition:.22s ease;z-index:60;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,84vw);background:#fff;z-index:61;
  transform:translateX(102%);transition:transform .26s ease;padding:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{width:34px;height:34px;border-radius:9px;border:1px solid var(--line-strong);background:#fff;cursor:pointer;font-size:16px;color:var(--ink-2);}
.drawer-title{font-size:13px;color:var(--ink-3);margin:18px 0 8px;letter-spacing:1px;}
.drawer-list li a{display:block;padding:12px 12px;border-radius:10px;font-size:15px;color:var(--ink-2);}
.drawer-list li a:hover{background:var(--alt);color:var(--brand);}
.drawer-cta{display:grid;gap:10px;margin-top:20px;}

/* ============ 文章头部 ============ */
.article-hero{
  padding:36px 0 30px;
  background:
    linear-gradient(180deg,rgba(255,255,255,.92),rgba(255,255,255,.92)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);flex-wrap:wrap;}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#C3CEDA;}
.article-title{margin:14px 0 0;font-size:clamp(26px,3.4vw,40px);line-height:1.3;max-width:900px;}
.meta-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:16px;font-size:14px;color:var(--ink-3);}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C3CEDA;display:inline-block;}
.hero-cover{margin-top:26px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.hero-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EEF3F9;}

/* ============ 布局 ============ */
.page-main{padding:48px 0 0;}
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;}
.article-body{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:36px 40px;max-width:100%;
}
.article-content{max-width:800px;margin:0 auto;font-size:17px;line-height:1.85;color:#1B2E45;}
.article-content > p{margin:0 0 1em;}
.article-content h2{
  position:relative;font-size:26px;margin:40px 0 16px;padding-left:14px;color:var(--ink);
}
.article-content h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:4px;background:var(--brand);}
.article-content h3{font-size:20px;font-weight:600;margin:28px 0 12px;}
.article-content h4{font-size:17px;font-weight:600;margin:22px 0 10px;}
.article-content ul,.article-content ol{margin:0 0 1.1em;padding-left:1.35em;}
.article-content ul{list-style:disc;}
.article-content ol{list-style:decimal;}
.article-content li{margin-bottom:.5em;line-height:1.8;}
.article-content li::marker{color:var(--brand);}
.article-content blockquote{
  margin:22px 0;padding:16px 20px;background:#F1F7FF;border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;color:#2B405A;
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{border-radius:var(--radius);margin:24px auto;box-shadow:var(--shadow);}
.article-content figure{margin:24px 0;}
.article-content figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px;}
.article-content code{
  background:#F1F4F8;border-radius:6px;padding:2px 6px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#2B405A;
}
.article-content pre{
  background:#F1F4F8;border-radius:12px;padding:16px;overflow:auto;font-size:14px;line-height:1.7;
}
.article-content pre code{background:none;padding:0;}
.article-content a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-content a:hover{color:var(--accent);}
.article-content table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;display:block;overflow-x:auto;}
.article-content th,.article-content td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-content th{background:#F5F8FC;font-weight:600;}
.article-content hr{border:none;border-top:1px solid var(--line);margin:32px 0;}

/* 空态 */
.empty-state{
  max-width:640px;margin:0 auto;text-align:center;padding:34px 20px 12px;
}
.empty-icon{
  width:80px;height:80px;margin:0 auto 18px;border-radius:24px;background:#F1F5FA;
  display:flex;align-items:center;justify-content:center;border:1px solid var(--line);
}
.empty-icon svg{width:36px;height:36px;stroke:var(--ink-3);fill:none;stroke-width:1.6;}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:20px;}

/* 标签与返回 */
.article-foot{margin-top:30px;padding-top:24px;border-top:1px solid var(--line);}
.tag-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:20px;}
.tag-row .label{font-size:14px;color:var(--ink-3);}
.back-links{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:15px;}
.back-links a{display:inline-flex;align-items:center;gap:6px;color:var(--brand);}
.back-links a:hover{color:var(--accent);}

/* ============ 板块通用 ============ */
.section{padding:64px 0;}
.section-alt{background:var(--alt);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:26px;}
.section-head p{font-size:15px;color:var(--ink-2);margin-top:8px;}
.section-more{font-size:15px;color:var(--brand);}
.section-more:hover{color:var(--accent);}

/* 步骤速览 */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.step-card{
  background:#fff;border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);
  border:1px solid var(--line);position:relative;transition:transform .2s ease,box-shadow .2s ease;
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.step-num{
  width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.step-card h3{font-size:18px;margin-bottom:8px;}
.step-card p{font-size:14.5px;color:var(--ink-2);line-height:1.75;}
.steps-line{height:1px;background:var(--line);margin:0 0 32px;}

/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.card{
  display:flex;flex-direction:column;background:#fff;border-radius:var(--radius);
  border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.card-cover{overflow:hidden;background:#EEF3F9;}
.card-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease;loading:lazy;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:16.5px;font-weight:600;line-height:1.55;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card:hover .card-title{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.card-desc{font-size:14px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{display:flex;align-items:center;gap:10px;margin-top:auto;font-size:13px;color:var(--ink-3);}
.related-empty{
  grid-column:1/-1;background:#fff;border:1px dashed var(--line-strong);border-radius:var(--radius);
  padding:28px;text-align:center;color:var(--ink-3);font-size:15px;
}

/* ============ FAQ ============ */
.faq-wrap{background:#fff;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 26px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand);background:#FAFCFF;}
.faq-q .plus{flex-shrink:0;width:22px;height:22px;position:relative;transition:transform .24s ease;}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;left:50%;top:50%;
}
.faq-q .plus::before{width:14px;height:2px;transform:translate(-50%,-50%);}
.faq-q .plus::after{width:2px;height:14px;transform:translate(-50%,-50%);}
.faq-item.is-open .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 26px 22px;font-size:15px;line-height:1.8;color:var(--ink-2);}

/* ============ CTA ============ */
.cta-band{
  margin:72px 0;border-radius:20px;padding:52px 36px;text-align:center;position:relative;overflow:hidden;
  background:
    repeating-linear-gradient(135deg,rgba(15,111,224,.045) 0 12px,rgba(15,111,224,0) 12px 26px),
    #fff;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(22px,3vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--ink-2);font-size:15.5px;max-width:640px;margin:0 auto 26px;}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;}
.cta-note{margin-top:18px;font-size:13.5px;color:var(--ink-3);}

/* ============ 页脚 ============ */
.site-footer{background:#F8FAFD;border-top:1px solid var(--line);padding:56px 0 26px;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;font-size:14px;border-radius:10px;}
.footer-brand strong{font-size:16px;}
.footer-desc{font-size:14px;color:var(--ink-2);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:14px;color:var(--ink);}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--ink-2);}
.footer-col a:hover{color:var(--brand);}
.footer-col p{font-size:14px;color:var(--ink-2);margin-bottom:8px;line-height:1.7;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;
  background:#fff;border:1px solid var(--brand);color:var(--brand);cursor:pointer;
  display:flex;align-items:center;justify-content:center;z-index:40;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,box-shadow .22s ease;
  box-shadow:0 8px 20px rgba(16,42,67,.12);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:var(--brand);color:#fff;}
.to-top svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2.2;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 20px;}
}
@media (max-width:1023px){
  .search input{width:170px;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .article-body{padding:30px 28px;}
}
@media (max-width:767px){
  .search{display:none;}
  .hamburger{display:block;}
  .topbar-inner{height:64px;}
  .brand-text{font-size:15.5px;}
  .nav-list{gap:2px;overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;}
  .nav-link{white-space:nowrap;padding:11px 8px;font-size:13.5px;}
  .nav-hot{display:none;}
  .nav-inner{min-height:44px;}
  .article-hero{padding:24px 0 22px;}
  .page-main{padding:30px 0 0;}
  .article-body{padding:24px 20px;border-radius:14px;}
  .article-content{font-size:16.5px;}
  .article-content h2{font-size:22px;margin-top:32px;}
  .article-content h3{font-size:18.5px;}
  .section{padding:48px 0;}
  .section-head h2{font-size:22px;}
  .steps-grid{grid-template-columns:1fr;}
  .related-grid{grid-template-columns:1fr;}
  .faq-q{padding:17px 18px;font-size:15.5px;}
  .faq-a p{padding:0 18px 18px;}
  .cta-band{padding:38px 20px;margin:48px 0;border-radius:16px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;font-size:12.5px;}
  .to-top{right:16px;bottom:20px;width:42px;height:42px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  body{font-size:15.5px;}
  .brand-text{font-size:14.5px;}
  .brand-mark{width:34px;height:34px;font-size:13px;border-radius:10px;}
  .article-title{font-size:23px;}
  .meta-row{font-size:13px;gap:8px;}
  .hero-cover{margin-top:20px;}
  .btn{padding:11px 18px;font-size:14.5px;}
  .cta-band h2{font-size:20px;}
}

/* roulang page: category2 */
:root{
  --brand:#0F6FE0;
  --brand-deep:#0B57B4;
  --brand-soft:rgba(15,111,224,.10);
  --brand-line:#C9D8EA;
  --accent:#FF7A2F;
  --accent-deep:#E9621A;
  --ok:#16A34A;
  --warn:#E5484D;
  --bg:#F4F7FB;
  --card:#FFFFFF;
  --soft:#EAF1FA;
  --text:#12233A;
  --muted:#5A6B7D;
  --faint:#93A1B0;
  --line:#E4EAF2;
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(16,42,67,.05),0 10px 28px rgba(16,42,67,.07);
  --sh2:0 6px 14px rgba(16,42,67,.08),0 18px 40px rgba(16,42,67,.10);
  --header-h:106px;
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.num{font-variant-numeric:tabular-nums}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-size:15px;font-weight:500;line-height:1;
  padding:0 20px;height:46px;border:1px solid transparent;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(0);filter:saturate(.9)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:#1B7BE8;transform:translateY(-1px);box-shadow:0 8px 20px rgba(15,111,224,.24)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#FF8A47;transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,122,47,.28)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--brand-line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-sm{height:38px;font-size:14px;padding:0 14px}
.btn-lg{height:52px;font-size:16px;padding:0 26px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;line-height:1;background:var(--brand-soft);color:var(--brand);
}
.tag-accent{background:rgba(255,122,47,.12);color:var(--accent-deep)}
.tag-ok{background:rgba(22,163,74,.12);color:var(--ok)}
.tag-warn{background:rgba(229,72,77,.12);color:var(--warn)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,background-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  box-shadow:0 2px 12px rgba(16,42,67,.08);
}
.brand-row{border-bottom:1px solid var(--line)}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:62px;transition:height .25s ease}
.site-header.is-scrolled .brand-inner{height:46px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--brand) 0%,#2E8BF0 60%,var(--accent) 140%);
  color:#fff;font-size:15px;font-weight:700;letter-spacing:.5px;
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 12px;
  border:1px solid #D8E3F0;border-radius:var(--r-btn);background:#fff;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box svg{width:16px;height:16px;fill:var(--faint);flex:0 0 auto}
.search-box input{border:0;outline:none;background:transparent;width:168px;font-size:14px}
.search-box input::placeholder{color:var(--faint)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,111,224,.16)}
.burger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .2s ease,opacity .2s ease}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.header-nav{display:block}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:44px}
.nav-list{display:flex;align-items:center;gap:6px;height:100%}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  font-size:14px;color:var(--muted);border-radius:8px;transition:color .18s ease,background-color .18s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link.is-active{color:var(--text);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:3px;border-radius:3px;background:var(--brand);
}
.nav-hot{display:flex;align-items:center;gap:8px}
.hot-pill{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;color:var(--muted);background:var(--soft);border:1px solid transparent;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.hot-pill:hover{color:var(--brand);border-color:var(--brand-line);background:#fff}
.hot-pill.is-accent{color:var(--accent-deep);background:rgba(255,122,47,.12)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:320px;max-width:88vw;z-index:90;
  background:#fff;box-shadow:-12px 0 40px rgba(16,42,67,.14);
  transform:translateX(102%);transition:transform .28s ease;
  padding:22px 20px 32px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-mask{position:fixed;inset:0;background:rgba(18,35,58,.42);z-index:80;opacity:0;pointer-events:none;transition:opacity .25s ease}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);font-size:18px;line-height:1;color:var(--muted)}
.drawer-group{margin-bottom:22px}
.drawer-group h4{font-size:13px;color:var(--faint);font-weight:500;letter-spacing:.5px;margin-bottom:10px}
.drawer-links a{display:block;padding:11px 12px;border-radius:10px;font-size:15px;color:var(--text);transition:background-color .18s ease,color .18s ease}
.drawer-links a:hover,.drawer-links a.is-active{background:var(--brand-soft);color:var(--brand)}
.drawer .search-box{width:100%;margin-bottom:16px}
.drawer .search-box input{width:100%}
.drawer-actions{display:grid;gap:10px}

/* ---------- 吸底下载条 ---------- */
.dock-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:rgba(255,255,255,.96);border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(16,42,67,.08);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
  align-items:center;gap:12px;transition:transform .25s ease,opacity .25s ease;
}
.dock-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
.dock-bar .dock-text{flex:1;min-width:0}
.dock-bar .dock-text strong{display:block;font-size:14px}
.dock-bar .dock-text span{font-size:12px;color:var(--faint)}

/* ---------- 通用板块 ---------- */
main{display:block}
.section{padding:76px 0}
.section-alt{background:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;font-weight:700}
.section-head p{color:var(--muted);font-size:15px;margin-top:10px;max-width:720px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);font-weight:600;letter-spacing:.3px;margin-bottom:12px}

/* ---------- 面包屑 ---------- */
.crumb{padding:20px 0 6px;font-size:14px;color:var(--faint)}
.crumb a{color:var(--faint)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{margin:0 8px}
.crumb .crumb-tag{display:inline-flex;align-items:center;height:22px;padding:0 10px;margin-left:10px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);font-size:12px}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.hero::before{content:"";position:absolute;inset:0;background:rgba(255,255,255,.9)}
.hero-inner{
  position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;
  gap:52px;align-items:center;padding:52px 0 60px;
}
.hero h1{font-size:clamp(30px,4vw,46px);line-height:1.25;font-weight:700;letter-spacing:-.3px}
.hero-sub{color:var(--muted);font-size:16px;margin-top:18px;max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.version-line{margin-top:22px;font-size:14px;color:var(--faint);line-height:1.7}
.hero-side{position:relative}
.hero-shot{
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh2);
  transform:rotate(-1.2deg);background:#EEF3F9;
}
.hero-shot img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-stat{
  position:absolute;left:-14px;bottom:-18px;background:#fff;border-radius:14px;
  padding:14px 18px;box-shadow:var(--sh1);border:1px solid var(--line);
}
.hero-stat strong{display:block;font-size:22px;line-height:1.2;color:var(--brand);font-weight:700}
.hero-stat span{font-size:13px;color:var(--muted)}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;top:var(--header-h);z-index:40;
  background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.anchor-list{display:flex;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.anchor-list::-webkit-scrollbar{display:none}
.anchor-link{
  flex:0 0 auto;display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;
  font-size:14px;color:var(--muted);transition:all .18s ease;
}
.anchor-link:hover{color:var(--brand);border-color:var(--brand-line)}
.anchor-link.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:500}

/* ---------- 横向卡带 ---------- */
.rail-wrap{position:relative}
.rail-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 18px;scrollbar-width:none;
}
.rail-track::-webkit-scrollbar{display:none}
.rail-card{
  flex:0 0 288px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh1);overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:var(--brand-line)}
.rail-thumb{background:#EEF3F9}
.rail-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.rail-info{padding:20px}
.rail-info h3{font-size:17px;font-weight:600;margin:12px 0 8px}
.rail-info p{font-size:14px;color:var(--muted);line-height:1.7;min-height:48px}
.rail-meta{display:block;margin-top:12px;font-size:13px;color:var(--faint)}
.rail-nav{display:flex;justify-content:flex-end;gap:10px;margin-top:4px}
.rail-btn{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--brand-line);background:#fff;
  color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:16px;
  transition:background-color .18s ease,color .18s ease,transform .18s ease;
}
.rail-btn:hover{background:var(--brand);color:#fff;transform:translateY(-1px)}

/* ---------- 图文双列对照 ---------- */
.compare-row{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  padding:30px 0;border-bottom:1px dashed var(--line);
}
.compare-row:last-child{border-bottom:0}
.compare-row.is-flip .compare-media{order:2}
.compare-media{border-radius:var(--r-card);overflow:hidden;background:#EEF3F9;box-shadow:var(--sh1)}
.compare-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .35s ease}
.compare-media:hover img{transform:scale(1.02)}
.compare-text h3{font-size:22px;font-weight:700;margin:14px 0 12px;line-height:1.4}
.compare-text p{color:var(--muted);font-size:15px}
.check-list{margin-top:16px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:26px;font-size:14px;color:var(--muted);line-height:1.7}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg);
}
.note-box{
  margin-top:18px;padding:14px 16px;border-radius:12px;background:var(--soft);
  border-left:3px solid var(--brand);font-size:14px;color:var(--muted);
}

/* ---------- 步骤条 ---------- */
.steps{display:grid;gap:0;margin-top:8px}
.step{position:relative;display:grid;grid-template-columns:56px 1fr;gap:20px;padding-bottom:32px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:27px;top:52px;bottom:6px;width:1px;background:#DCE6F2;
}
.step:last-child::before{display:none}
.step-num{
  width:56px;height:56px;border-radius:50%;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:19px;font-weight:700;
  box-shadow:0 8px 18px rgba(15,111,224,.22);
}
.step.is-done .step-num{background:var(--accent);box-shadow:0 8px 18px rgba(255,122,47,.24)}
.step-body{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px 24px;box-shadow:var(--sh1)}
.step-body h3{font-size:18px;font-weight:600;margin-bottom:8px}
.step-body p{font-size:14px;color:var(--muted)}
.step-body .step-tip{display:block;margin-top:10px;font-size:13px;color:var(--faint)}

/* ---------- 下载按钮组 ---------- */
.dl-wrap{display:grid;grid-template-columns:1.9fr .8fr;gap:24px;align-items:stretch}
.dl-group{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dl-card{
  display:flex;flex-direction:column;justify-content:center;gap:6px;
  padding:22px;border-radius:var(--r-card);border:1px solid var(--line);background:#fff;
  box-shadow:var(--sh1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  min-height:120px;
}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--sh2)}
.dl-card.is-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.dl-card.is-primary .dl-sub{color:rgba(255,255,255,.86)}
.dl-card.is-primary:hover{background:#FF8A47}
.dl-card:not(.is-primary):hover{border-color:var(--brand-line)}
.dl-card .dl-main{font-size:16px;font-weight:600}
.dl-card .dl-sub{font-size:13px;color:var(--muted);line-height:1.6}
.qr-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh1);display:flex;flex-direction:column;align-items:center;gap:14px;
  text-align:center;
}
.qr-box{
  position:relative;width:132px;height:132px;border-radius:12px;border:1px solid var(--line);
  background-color:#fff;
  background-image:repeating-conic-gradient(#12233A 0 25%,#fff 0 50%);
  background-size:12px 12px;background-position:0 0;
}
.qr-box::before,.qr-box::after{
  content:"";position:absolute;width:34px;height:34px;border:5px solid #fff;border-radius:6px;
  background:#12233A;box-shadow:0 0 0 1px #12233A inset;
}
.qr-box::before{left:6px;top:6px}
.qr-box::after{right:6px;bottom:6px}
.qr-card p{font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- FAQ ---------- */
.faq{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 26px;text-align:left;font-size:16px;font-weight:600;line-height:1.6;
  transition:background-color .18s ease;
}
.faq-q:hover{background:#F7FAFE}
.faq-icon{
  position:relative;flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  background:var(--brand-soft);transition:transform .25s ease,background-color .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:rgba(255,122,47,.14)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--accent-deep)}
.faq-a{display:none;padding:0 26px 22px;font-size:15px;color:var(--muted);line-height:1.85;max-width:900px}
.faq-item.is-open .faq-a{display:block}

/* ---------- CTA 条 ---------- */
.cta-band{
  border-radius:20px;padding:52px 32px;text-align:center;
  background-color:#EAF1FA;
  background-image:repeating-linear-gradient(135deg,rgba(15,111,224,.045) 0 12px,rgba(255,255,255,0) 12px 24px);
  border:1px solid var(--line);
}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);font-weight:700;line-height:1.35}
.cta-band p{color:var(--muted);margin-top:14px;font-size:15px}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ---------- 相关链接 ---------- */
.link-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.link-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--sh1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.link-item:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:var(--brand-line)}
.link-item h3{font-size:16px;font-weight:600;margin-bottom:8px;transition:color .18s ease}
.link-item:hover h3{color:var(--brand);text-decoration:underline}
.link-item p{font-size:14px;color:var(--muted);line-height:1.7}
.link-item .link-meta{display:block;margin-top:12px;font-size:13px;color:var(--faint)}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:65;
  width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--brand-line);
  color:var(--brand);font-size:18px;box-shadow:var(--sh1);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease,background-color .18s ease;
}
.to-top.is-visible{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--brand);color:#fff;transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.site-footer{background:#FFFFFF;border-top:1px solid var(--line);margin-top:20px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:10px;font-size:13px}
.footer-brand strong{font-size:16px}
.footer-desc{font-size:14px;color:var(--muted);line-height:1.8;max-width:320px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:14px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .18s ease}
.footer-col a:hover{color:var(--brand);text-decoration:underline}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.9}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--faint);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px}
}
@media (max-width:1023px){
  .container{padding:0 20px}
  .brand-inner{height:58px}
  .site-header.is-scrolled .brand-inner{height:52px}
  .header-nav{display:none}
  .search-box{display:none}
  .burger{display:inline-flex}
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:36px 0 48px}
  .hero-sub{max-width:none}
  .hero-stat{left:12px;bottom:-14px}
  .compare-row{grid-template-columns:1fr;gap:24px}
  .compare-row.is-flip .compare-media{order:0}
  .dl-wrap{grid-template-columns:1fr}
  .dl-group{grid-template-columns:1fr 1fr}
  .link-list{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:56px 0}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .container{padding:0 16px}
  .brand-text{font-size:15px}
  .brand-mark{width:38px;height:38px;font-size:14px}
  .brand-tools .btn-ghost{display:none}
  .hero h1{font-size:clamp(26px,7vw,32px)}
  .hero-cta .btn{flex:1 1 auto}
  .section{padding:46px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;margin-bottom:26px}
  .rail-card{flex:0 0 254px}
  .rail-nav{display:none}
  .dl-group{grid-template-columns:1fr}
  .link-list{grid-template-columns:1fr}
  .steps .step{grid-template-columns:46px 1fr;gap:14px}
  .step::before{left:22px;top:44px}
  .step-num{width:46px;height:46px;font-size:16px}
  .step-body{padding:16px 18px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a{padding:0 18px 18px}
  .cta-band{padding:38px 20px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;gap:8px}
  .dock-bar{display:flex}
  .to-top{right:14px;bottom:84px}
  .anchor-link{height:34px;padding:0 14px;font-size:13px}
}
@media (max-width:479px){
  .hero h1{font-size:26px}
  .hero-sub{font-size:15px}
  .version-line{font-size:13px}
  .brand-text{max-width:150px}
  .dl-card{min-height:0;padding:18px}
  .btn{padding:0 16px}
  .btn-lg{height:48px;font-size:15px}
}

/* roulang page: category1 */
:root{
  --brand:#0F6FE0;
  --brand-dark:#0B57B0;
  --accent:#FF7A2F;
  --accent-dark:#E96617;
  --ok:#16A34A;
  --warn:#E5484D;
  --bg:#F4F7FB;
  --card:#FFFFFF;
  --alt:#EAF1FA;
  --text:#12233A;
  --muted:#5A6B7D;
  --faint:#93A1B0;
  --border:#E4EAF2;
  --border-strong:#C9D8EA;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(16,42,67,.05),0 10px 28px rgba(16,42,67,.07);
  --shadow-hover:0 6px 14px rgba(16,42,67,.08),0 18px 40px rgba(16,42,67,.10);
  --container:1180px;
  --header-h:112px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;background:#EEF3F9}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--accent)}
button{font-family:inherit}
input,button,select,textarea{font-size:100%}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:.2px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
:focus-visible{outline:3px solid rgba(15,111,224,.28);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;z-index:200;border-radius:0 0 10px 0}
.skip:focus{left:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:500;line-height:1.2;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
  text-align:center;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(15,111,224,.22)}
.btn-primary:hover{background:#2C81E8;color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(15,111,224,.26)}
.btn-primary:active{transform:translateY(0);background:var(--brand-dark)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 4px 12px rgba(255,122,47,.26)}
.btn-accent:hover{background:#FF8F4D;color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,122,47,.3)}
.btn-accent:active{transform:translateY(0);background:var(--accent-dark)}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--border-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);background:#F5F9FF}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:15px 28px;font-size:16px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn-block{width:100%}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);
  font-size:12px;line-height:1.7;
  background:rgba(15,111,224,.1);color:var(--brand);
}
.tag-accent{background:rgba(255,122,47,.12);color:var(--accent-dark)}
.tag-ok{background:rgba(22,163,74,.12);color:var(--ok)}
.tag-warn{background:rgba(229,72,77,.1);color:var(--warn)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:#fff;border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease,background-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  box-shadow:0 2px 12px rgba(16,42,67,.08);
}
.header-top-inner{
  display:flex;align-items:center;gap:18px;
  padding:12px 0 10px;
  transition:padding .25s ease;
}
.site-header.is-scrolled .header-top-inner{padding:7px 0 6px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;letter-spacing:0;
  box-shadow:0 4px 10px rgba(15,111,224,.28);
}
.brand-mark::after{
  content:"";position:absolute;margin-left:34px;margin-top:22px;
  width:14px;height:2px;background:var(--accent);border-radius:2px;
}
.brand-text{font-size:16px;font-weight:700;color:var(--text);white-space:nowrap}
.brand-text:hover{color:var(--brand)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.header-search{display:flex;align-items:center;background:#F6F9FD;border:1px solid var(--border);border-radius:var(--radius-pill);padding:4px 6px 4px 14px;transition:border-color .2s,box-shadow .2s}
.header-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,111,224,.18);background:#fff}
.header-search input{
  border:0;background:transparent;outline:none;width:150px;height:32px;
  font-size:14px;color:var(--text);
}
.header-search input::placeholder{color:var(--faint)}
.header-search button{
  border:0;background:var(--brand);color:#fff;border-radius:var(--radius-pill);
  width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  transition:background-color .2s;
}
.header-search button:hover{background:#2C81E8}
.login-link{font-size:14px;color:var(--brand);font-weight:500;white-space:nowrap}
.login-link:hover{color:var(--accent)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border-strong);
  background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.menu-toggle span{display:block;width:16px;height:2px;background:var(--text);border-radius:2px;transition:.2s}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.header-nav{transition:padding .25s ease}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 24px 8px;
}
.nav-list{display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.nav-link{
  position:relative;display:inline-block;padding:6px 2px 10px;
  font-size:14px;color:var(--muted);font-weight:500;
  transition:color .2s,background-color .2s;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:3px;border-radius:3px;
  background:transparent;transition:background-color .2s;
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{background:rgba(15,111,224,.18)}
.nav-link.is-active{color:var(--text);font-weight:700}
.nav-link.is-active::after{background:var(--brand)}
.nav-hot{display:flex;align-items:center;gap:8px}
.hot-pill{
  font-size:12px;padding:5px 12px;border-radius:var(--radius-pill);
  background:rgba(15,111,224,.08);color:var(--brand);white-space:nowrap;
  transition:background-color .2s,color .2s,transform .2s;
}
.hot-pill:hover{background:rgba(15,111,224,.16);transform:translateY(-1px)}
.hot-pill.is-accent{background:rgba(255,122,47,.12);color:var(--accent-dark)}
.hot-pill.is-accent:hover{background:rgba(255,122,47,.2)}

/* ---------- 抽屉 ---------- */
.drawer-backdrop{position:fixed;inset:0;background:rgba(18,35,58,.42);z-index:70;opacity:0;pointer-events:none;transition:opacity .25s}
.drawer-backdrop.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);z-index:80;
  background:#fff;box-shadow:-12px 0 40px rgba(16,42,67,.16);
  transform:translateX(102%);transition:transform .3s ease;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{border:1px solid var(--border-strong);background:#fff;border-radius:10px;width:34px;height:34px;cursor:pointer;color:var(--muted);font-size:16px;line-height:1}
.drawer-section{margin-bottom:22px}
.drawer-section h4{font-size:13px;color:var(--faint);font-weight:600;margin-bottom:10px;letter-spacing:.5px}
.drawer-nav a{display:block;padding:12px 14px;border-radius:12px;font-size:15px;color:var(--text);font-weight:500;border:1px solid var(--border)}
.drawer-nav li+li{margin-top:10px}
.drawer-nav a.is-active{border-color:rgba(15,111,224,.4);background:rgba(15,111,224,.06);color:var(--brand)}
.drawer-hot{display:flex;flex-wrap:wrap;gap:8px}
.drawer-search{display:flex;flex-direction:column;gap:10px}
.drawer-search input{height:44px;border:1px solid #D8E3F0;border-radius:10px;padding:0 14px;outline:none;color:var(--text)}
.drawer-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,111,224,.18)}

/* ---------- 页面头 ---------- */
.page-hero{
  position:relative;
  background:#EFF4FB url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:48px 0 56px;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(135deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.9) 55%,rgba(234,241,250,.88) 100%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='48' height='48'><path d='M0 48L48 0' stroke='%230F6FE0' stroke-width='2' opacity='0.05'/></svg>");
}
.page-hero .container{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--faint);margin-bottom:18px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs span.sep{color:#C4CFDC}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.page-hero h1{
  font-size:clamp(30px,4vw,46px);line-height:1.25;font-weight:700;margin-bottom:16px;
}
.page-hero .lead{font-size:17px;color:var(--muted);line-height:1.85;max-width:620px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-meta{
  margin-top:18px;font-size:14px;color:var(--faint);
  display:flex;flex-wrap:wrap;gap:6px 0;
}
.hero-meta span{display:inline-flex;align-items:center}
.hero-meta span+span::before{content:"·";margin:0 8px;color:#C4CFDC}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-card);
  box-shadow:0 18px 46px rgba(16,42,67,.16);
  transform:rotate(-1.2deg);
}
.hero-visual .float-card{
  position:absolute;left:-14px;bottom:22px;background:#fff;border-radius:14px;
  padding:12px 16px;box-shadow:var(--shadow-card);font-size:13px;color:var(--muted);
  display:flex;align-items:center;gap:8px;
}
.hero-visual .float-card strong{color:var(--text);font-size:15px}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;top:var(--header-h);z-index:40;
  background:#fff;border-bottom:1px solid var(--border);
  transition:box-shadow .2s;
}
.anchor-inner{display:flex;align-items:center;gap:10px;padding:10px 24px;overflow-x:auto;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-pill{
  flex:0 0 auto;padding:7px 16px;border-radius:var(--radius-pill);
  font-size:14px;color:var(--muted);background:#F3F7FC;border:1px solid transparent;
  transition:all .2s;white-space:nowrap;
}
.anchor-pill:hover{color:var(--brand);background:rgba(15,111,224,.08)}
.anchor-pill.is-current{color:#fff;background:var(--brand);border-color:var(--brand);font-weight:500}

/* ---------- 通用板块 ---------- */
.section{padding:76px 0}
.section-alt{background:var(--alt)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,31px);line-height:1.35;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--brand);font-weight:600;letter-spacing:1px;margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--accent)}

/* 编号分点长文 */
.num-list{margin-top:8px}
.num-item{
  display:grid;grid-template-columns:86px 1fr;gap:26px;
  padding:30px 0;border-top:1px solid var(--border);
}
.num-item:last-child{border-bottom:1px solid var(--border)}
.num-index{
  font-size:40px;font-weight:800;line-height:1;color:rgba(15,111,224,.16);
  font-variant-numeric:tabular-nums;padding-top:4px;
}
.num-body h3{font-size:20px;font-weight:600;margin-bottom:10px}
.num-body p{color:var(--muted);font-size:16px;line-height:1.85}
.num-body .mini-tip{
  margin-top:12px;font-size:14px;color:var(--muted);
  background:#F5F9FF;border-left:3px solid var(--brand);border-radius:0 10px 10px 0;padding:10px 14px;
}

/* 步骤清单 */
.step-list{display:grid;gap:14px;margin-top:6px}
.step-item{
  display:grid;grid-template-columns:44px 1fr;gap:18px;align-items:flex-start;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:20px 24px;box-shadow:0 1px 2px rgba(16,42,67,.04);
  transition:box-shadow .2s,transform .2s,border-color .2s;
}
.step-item:hover{box-shadow:var(--shadow-card);transform:translateY(-2px);border-color:rgba(15,111,224,.28)}
.step-dot{
  width:44px;height:44px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;
  font-variant-numeric:tabular-nums;
}
.step-item h3{font-size:17px;font-weight:600;margin-bottom:6px}
.step-item p{font-size:15px;color:var(--muted);line-height:1.8}

/* 图文区 */
.figure-block{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-top:8px;
}
.figure-block img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
}
.figure-copy h2{font-size:26px;margin-bottom:14px}
.figure-copy p{color:var(--muted);font-size:16px}
.check-list{margin-top:18px;display:grid;gap:10px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--muted)}
.check-list li::before{
  content:"";flex:0 0 auto;width:18px;height:18px;margin-top:4px;border-radius:50%;
  background:rgba(22,163,74,.12);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2316A34A' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-size:12px 12px;background-position:center;background-repeat:no-repeat;
}

/* 规格卡 */
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:8px}
.spec-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-card);
  transition:box-shadow .2s,transform .2s;
}
.spec-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.spec-card h3{font-size:18px;margin-bottom:6px}
.spec-card .spec-sub{font-size:13px;color:var(--faint);margin-bottom:16px}
.spec-card dl dt{font-size:13px;color:var(--faint);margin-top:12px}
.spec-card dl dd{font-size:15px;color:var(--text);margin-top:2px}
.spec-card .spec-state{margin-top:18px}

/* 异常卡片 */
.trouble-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:8px}
.trouble-card{
  background:var(--card);border:1px solid var(--border);border-left:4px solid var(--brand);
  border-radius:14px;padding:22px 24px;transition:box-shadow .2s,transform .2s;
}
.trouble-card:hover{box-shadow:var(--shadow-card);transform:translateY(-2px)}
.trouble-card h3{font-size:17px;margin-bottom:8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.trouble-card p{font-size:15px;color:var(--muted);line-height:1.8}

/* FAQ */
.faq{margin-top:8px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card)}
.faq-item+.faq-item{border-top:1px solid var(--border)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;padding:20px 24px;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);transition:background-color .2s,color .2s;
}
.faq-q:hover{background:#F7FAFE;color:var(--brand)}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;border-radius:50%;
  background:rgba(15,111,224,.1);transition:transform .25s,background-color .25s;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--accent);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.is-open .faq-a{max-height:520px}
.faq-a-inner{padding:0 24px 22px;font-size:15px;color:var(--muted);line-height:1.85}

/* CTA */
.cta-band{
  position:relative;border-radius:20px;padding:52px 40px;text-align:center;overflow:hidden;
  background:linear-gradient(135deg,#EAF1FA 0%,#F6FAFF 100%);
  border:1px solid var(--border);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='40' height='40'><path d='M0 40L40 0' stroke='%230F6FE0' stroke-width='2' opacity='0.05'/></svg>");
}
.cta-band>*{position:relative}
.cta-band h2{font-size:clamp(23px,2.8vw,29px);margin-bottom:12px}
.cta-band p{color:var(--muted);max-width:640px;margin:0 auto 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* 下载按钮组 */
.dl-group{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
.dl-btn{
  display:flex;flex-direction:column;gap:4px;align-items:flex-start;
  padding:16px 20px;border-radius:12px;border:1px solid var(--border-strong);background:#fff;
  transition:transform .2s,box-shadow .2s,border-color .2s,color .2s;
}
.dl-btn strong{font-size:16px;font-weight:600;color:var(--text)}
.dl-btn small{font-size:12px;color:var(--faint)}
.dl-btn:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--shadow-card)}
.dl-btn:hover strong{color:var(--brand)}
.dl-btn.is-accent{background:var(--accent);border-color:var(--accent)}
.dl-btn.is-accent strong{color:#fff}
.dl-btn.is-accent small{color:rgba(255,255,255,.82)}
.dl-btn.is-accent:hover strong{color:#fff}
.qr-card{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  border:1px solid var(--border);border-radius:var(--radius-card);padding:18px;background:#fff;
  box-shadow:var(--shadow-card);
}
.qr-card .qr-box{
  width:120px;height:120px;border-radius:12px;border:1px solid var(--border);background:#F3F7FC;
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.qr-card .qr-box img{width:100%;height:100%;object-fit:cover}
.qr-card span{font-size:13px;color:var(--muted);text-align:center}

/* 相关链接 */
.link-list{display:grid;gap:12px;margin-top:8px}
.link-item{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:var(--card);border:1px solid var(--border);border-radius:12px;
  padding:16px 20px;transition:border-color .2s,box-shadow .2s,transform .2s;
}
.link-item:hover{border-color:rgba(15,111,224,.35);box-shadow:var(--shadow-card);transform:translateX(3px)}
.link-item span{font-size:15px;color:var(--text);font-weight:500}
.link-item em{font-style:normal;font-size:13px;color:var(--faint)}

/* 吸底下载条 */
.mobile-dl-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;
  background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-top:1px solid var(--border);padding:10px 16px;
  box-shadow:0 -4px 18px rgba(16,42,67,.08);
  transition:transform .25s ease,opacity .25s ease;
}
.mobile-dl-bar.is-hidden{transform:translateY(110%);opacity:0}
.mobile-dl-bar .bar-inner{display:flex;align-items:center;gap:12px}
.mobile-dl-bar .bar-text{font-size:12px;color:var(--faint);line-height:1.4}
.mobile-dl-bar .bar-text strong{display:block;font-size:14px;color:var(--text)}
.mobile-dl-bar .btn{flex:0 0 auto}

/* 页脚 */
.site-footer{background:#FFFFFF;border-top:1px solid var(--border);padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand strong{font-size:16px;font-weight:700;color:var(--text)}
.footer-desc{font-size:14px;color:var(--muted);line-height:1.8;max-width:320px}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:14px;color:var(--text)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--brand)}
.footer-col p{font-size:14px;color:var(--muted);margin-bottom:8px}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:13px;color:var(--faint);
}
.brand-mark.small{width:32px;height:32px;font-size:13px;border-radius:9px}
.brand-mark.small::after{margin-left:28px;margin-top:19px}

/* 响应式 */
@media (max-width:1279px){
  :root{--container:960px}
}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual img{transform:none;aspect-ratio:16/10}
  .spec-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .figure-block{grid-template-columns:1fr;gap:26px}
  .header-search input{width:110px}
  .nav-hot{display:none}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .page-hero{padding:32px 0 40px}
  .container{padding:0 16px}
  .nav-inner{padding:0 16px 8px}
  .header-search{display:none}
  .login-link{display:none}
  .menu-toggle{display:inline-flex}
  .nav-list{gap:18px;overflow-x:auto;flex-wrap:nowrap;padding-bottom:2px}
  .nav-link{font-size:13px;white-space:nowrap}
  .num-item{grid-template-columns:56px 1fr;gap:16px;padding:24px 0}
  .num-index{font-size:32px}
  .spec-grid,.trouble-grid,.dl-group{grid-template-columns:1fr}
  .figure-block img{aspect-ratio:16/9}
  .cta-band{padding:36px 20px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .mobile-dl-bar{display:block}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 18px;font-size:14px}
  .anchor-inner{padding:8px 16px}
  body{padding-bottom:74px}
}
@media (max-width:479px){
  .page-hero h1{font-size:28px}
  .page-hero .lead{font-size:15px}
  .hero-cta .btn{width:100%}
  .brand-text{font-size:14px}
  .section-head h2{font-size:22px}
  .num-item{grid-template-columns:44px 1fr;gap:12px}
  .num-index{font-size:26px}
  .step-item{padding:16px 16px;grid-template-columns:36px 1fr;gap:12px}
  .step-dot{width:36px;height:36px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}