/* roulang page: index */
:root{
  --bg-0:#060912;--bg-1:#0B1224;--bg-2:#111B33;
  --primary:#FF6B4A;--primary-d:#E24E2E;--primary-l:#FFA184;
  --cyan:#4FD1FF;--gold:#FFC46B;
  --text:#EDF1FA;--muted:#A9B4CB;--weak:#6E7A94;
  --line:rgba(255,255,255,.10);--glass:rgba(255,255,255,.05);--glass-line:rgba(255,255,255,.12);
  --r-sm:12px;--r-md:18px;--r-lg:24px;
  --shadow:0 18px 48px rgba(0,0,0,.45);
  --maxw:1240px;--pad:clamp(56px,7vw,96px);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg-0);color:var(--text);font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,p{margin:0}
h1,h2,h3{letter-spacing:-.01em}
.container{width:100%;max-width:var(--maxw);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}
.grad{background:linear-gradient(120deg,#FF8A5C,#FF6B4A 45%,#FFC46B);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 26px;border-radius:999px;font-weight:700;font-size:15px;transition:transform .25s,box-shadow .25s,background .25s,color .25s,border-color .25s;white-space:nowrap}
.btn-primary{color:#1A0C07;background:linear-gradient(135deg,#FF7A4F,#FF5C3A);box-shadow:0 0 0 1px rgba(255,255,255,.16) inset,0 10px 30px rgba(255,107,74,.38)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,255,255,.2) inset,0 14px 38px rgba(255,107,74,.55)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border:1px solid var(--glass-line);color:var(--text);background:rgba(255,255,255,.04)}
.btn-ghost:hover{border-color:var(--cyan);background:rgba(79,209,255,.10);color:#fff}
.btn-sm{min-height:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible,.icon-btn:focus-visible,.nav-link:focus-visible,input:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.icon-btn{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.05);border:1px solid var(--glass-line);color:var(--muted);transition:.2s}
.icon-btn:hover{color:#fff;border-color:rgba(255,122,74,.45);background:rgba(255,122,74,.12)}
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(6,9,18,.72);backdrop-filter:blur(16px) saturate(120%);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:16px;height:68px;transition:height .25s}
.site-header.is-stuck .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.brand-mark{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#FF7A4F,#FF5C3A);color:#fff;font-size:12px;box-shadow:0 8px 24px rgba(255,107,74,.45)}
.brand-name{white-space:nowrap}
.nav-desktop{display:flex;gap:2px;margin-left:28px}
.nav-link{position:relative;padding:9px 12px;font-size:15px;color:var(--muted);border-radius:10px;transition:color .2s,transform .2s}
.nav-link:hover{color:#fff;transform:translateY(-6px)}
.nav-link.active{color:#fff}
.nav-link.active::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:2px;width:20px;height:2px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px var(--primary)}
.header-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.menu-btn{display:none}
.search-bar{max-height:0;overflow:hidden;transition:max-height .24s ease}
.search-bar.open{max-height:100px;border-top:1px solid var(--line)}
.search-form{display:flex;gap:10px;padding:14px 0}
.search-form input{flex:1;min-height:46px;border-radius:999px;border:1px solid var(--glass-line);background:rgba(255,255,255,.04);color:var(--text);padding:0 20px;outline:none}
.search-form input::placeholder{color:var(--weak)}
.search-form input:focus{border-color:var(--cyan)}
.drawer{position:fixed;inset:0;z-index:200;visibility:hidden;opacity:0;transition:opacity .28s}
.drawer.open{visibility:visible;opacity:1}
.drawer::before{content:"";position:absolute;inset:0;background:rgba(3,6,12,.66)}
.drawer-panel{position:absolute;top:0;right:0;height:100%;width:84%;max-width:360px;background:rgba(11,18,36,.97);backdrop-filter:blur(18px);border-left:1px solid var(--glass-line);padding:18px;display:flex;flex-direction:column;gap:6px;transform:translateX(100%);transition:transform .28s cubic-bezier(.2,.8,.2,1);overflow-y:auto}
.drawer.open .drawer-panel{transform:none}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer-group{font-size:12px;letter-spacing:.14em;color:var(--weak);padding:14px 4px 6px}
.drawer-link{display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:12px;color:var(--muted);border:1px solid transparent}
.drawer-link:hover,.drawer-link.active{color:#fff;background:rgba(255,255,255,.05);border-color:var(--glass-line)}
.drawer-panel .btn{margin-top:16px}
.hero{position:relative;overflow:hidden;padding:calc(68px + clamp(48px,7vw,84px)) 0 clamp(48px,7vw,84px);display:flex;align-items:center;min-height:min(88vh,820px)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/18f395169c4d86f9.jpg') center/cover no-repeat;opacity:.42}
.hero-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 22% 26%,rgba(18,34,74,.94),transparent 62%),linear-gradient(180deg,rgba(6,9,18,.5),var(--bg-0) 94%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:radial-gradient(circle at 30% 30%,#000,transparent 76%);mask-image:radial-gradient(circle at 30% 30%,#000,transparent 76%)}
.hero-inner{position:relative;z-index:1;max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--cyan);background:rgba(79,209,255,.10);border:1px solid rgba(79,209,255,.24);border-radius:999px;padding:5px 14px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.hero h1{font-size:clamp(30px,4.6vw,54px);line-height:1.15;font-weight:800;margin-top:20px}
.hero-lead{max-width:640px;color:var(--muted);font-size:16px;line-height:1.85;margin-top:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-progress{margin-top:34px;max-width:420px}
.hp-head{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;color:var(--muted);margin-bottom:10px}
.hp-head strong{font-size:16px;color:var(--primary);font-variant-numeric:tabular-nums}
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden}
.bar>span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#FF7A4F,#FFC46B)}
.trust{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px;font-size:13px;color:var(--weak)}
.trust span{display:inline-flex;align-items:center;gap:7px}
.trust i{width:6px;height:6px;border-radius:50%;background:var(--primary)}
.section{padding:var(--pad) 0;position:relative}
.section-alt{background:var(--bg-1)}
.section-head{max-width:760px;margin-bottom:40px}
.section-title{font-size:clamp(22px,3vw,34px);font-weight:700;line-height:1.25}
.section-desc{color:var(--muted);font-size:15px;line-height:1.8;margin-top:12px}
.card{position:relative;background:var(--glass);border:1px solid var(--glass-line);border-radius:var(--r-md);backdrop-filter:blur(18px) saturate(120%);box-shadow:var(--shadow);padding:24px;transition:transform .3s,border-color .3s,box-shadow .3s}
.card:hover{transform:translateY(-4px);border-color:rgba(255,122,74,.45);box-shadow:0 24px 60px rgba(0,0,0,.55)}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){.card,.drawer-panel{background:var(--bg-2)}}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px 20px}
.pain-num{position:absolute;top:16px;right:20px;font-size:13px;color:var(--weak);font-variant-numeric:tabular-nums}
.ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;color:var(--primary);background:rgba(255,107,74,.10);border:1px solid rgba(255,107,74,.24);box-shadow:0 0 20px rgba(255,107,74,.14) inset}
.pain-card h3{font-size:17px;margin-top:16px}
.pain-card p{color:var(--muted);font-size:14px;line-height:1.7;margin-top:8px}
.split{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center}
.split p{color:var(--muted);font-size:15px;line-height:1.85;margin-top:14px}
.points{list-style:none;padding:0;margin:22px 0 0}
.points li{display:flex;align-items:flex-start;gap:10px;padding:7px 0;font-size:15px}
.points li::before{content:"";flex:0 0 8px;height:8px;margin-top:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 12px rgba(255,107,74,.8)}
.link-more{display:inline-flex;align-items:center;gap:6px;margin-top:22px;font-size:15px;color:var(--cyan);border-bottom:1px solid rgba(79,209,255,.35);padding-bottom:2px}
.link-more:hover{color:#fff;border-color:#fff}
.stage{position:relative;padding:18px 0}
.stage-main{border-radius:20px;overflow:hidden;border:1px solid var(--glass-line);box-shadow:var(--shadow)}
.stage-main img{width:100%;aspect-ratio:4/3;object-fit:cover}
.chip{position:absolute;padding:12px 16px;border-radius:14px;background:rgba(17,27,51,.9);border:1px solid var(--glass-line);backdrop-filter:blur(14px);font-size:13px;box-shadow:var(--shadow)}
.chip strong{display:block;font-size:15px;color:var(--text)}
.chip span{color:var(--weak);font-size:12px}
.chip-a{right:-12px;top:0;transform:rotate(2deg)}
.chip-b{left:-16px;bottom:8px;transform:rotate(-2deg)}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;margin-top:8px}
.timeline::before{content:"";position:absolute;top:9px;left:4%;right:4%;border-top:1px dashed rgba(255,255,255,.18)}
.step{position:relative;padding-top:40px}
.step::before{content:"";position:absolute;top:0;left:0;width:18px;height:18px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 5px rgba(255,107,74,.16),0 0 18px rgba(255,107,74,.6)}
.step h3{font-size:17px}
.step p{color:var(--muted);font-size:14px;line-height:1.7;margin-top:6px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-num{font-size:clamp(32px,4vw,44px);font-weight:800;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1.1}
.stat-num small{font-size:16px;font-weight:700;margin-left:2px;color:var(--primary-l)}
.stat p{color:var(--muted);font-size:13px;margin-top:8px}
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ladder-card{padding:26px;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--glass-line);transition:.3s}
.ladder-card:hover{transform:translateY(-4px);border-color:rgba(255,122,74,.45)}
.ladder-card.featured{border-color:rgba(255,122,74,.5);box-shadow:0 18px 48px rgba(255,107,74,.18)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;font-size:12px;letter-spacing:.04em;background:rgba(79,209,255,.14);color:var(--cyan)}
.badge.gold{background:rgba(255,196,107,.16);color:var(--gold)}
.ladder-card h3{font-size:18px;margin-top:14px}
.ladder-card p{color:var(--muted);font-size:14px;line-height:1.7;margin-top:8px}
.ladder-card .bar{margin-top:18px}
.ladder-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--weak);margin-top:8px;font-variant-numeric:tabular-nums}
.tbl-wrap{overflow-x:auto;border-radius:var(--r-md);border:1px solid var(--glass-line);background:var(--glass)}
.tbl{width:100%;border-collapse:collapse;font-size:15px;min-width:620px}
.tbl th,.tbl td{text-align:left;padding:16px 20px;border-bottom:1px solid var(--line)}
.tbl thead th{font-size:13px;letter-spacing:.05em;color:var(--weak);font-weight:600;background:rgba(255,255,255,.03)}
.tbl th:first-child,.tbl td:first-child{width:160px;color:var(--muted)}
.tbl tbody tr{transition:background .2s}
.tbl tbody tr:hover{background:rgba(255,255,255,.045)}
.tbl tbody tr:last-child td{border-bottom:0}
.banner{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--glass-line);padding:clamp(30px,5vw,56px)}
.banner-bg{position:absolute;inset:0;background:url('/assets/images/330823c89e2320f6.jpg') center/cover no-repeat;opacity:.3}
.banner-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,9,18,.94),rgba(11,18,36,.55))}
.banner-inner{position:relative;max-width:620px}
.banner-inner h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.25;margin-top:14px}
.banner-inner p{color:var(--muted);font-size:15px;line-height:1.8;margin-top:12px}
.banner-inner .btn{margin-top:24px}
.list{display:grid;gap:14px}
.list-item{display:grid;grid-template-columns:132px 1fr auto;gap:20px;align-items:center;padding:14px;border-radius:16px;background:var(--glass);border:1px solid var(--glass-line);transition:.3s}
.list-item:hover{transform:translateY(-3px);border-color:rgba(255,122,74,.45)}
.list-item img{width:132px;aspect-ratio:16/10;object-fit:cover;border-radius:12px}
.list-item h3{font-size:16px}
.list-item p{color:var(--weak);font-size:13px;margin-top:6px}
.list-meta{font-size:13px;color:var(--cyan);white-space:nowrap;font-variant-numeric:tabular-nums}
.reviews{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:10px;scrollbar-width:none}
.reviews::-webkit-scrollbar{display:none}
.review{flex:0 0 calc((100% - 40px)/3);scroll-snap-align:start}
.stars{display:flex;gap:3px;color:var(--primary)}
.review p{color:var(--muted);font-size:14px;line-height:1.75;margin-top:14px}
.review-foot{display:flex;align-items:center;gap:10px;margin-top:18px}
.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#FF7A4F,#4FD1FF);display:grid;place-items:center;font-size:14px;font-weight:700;color:#0B1224}
.review-foot span{font-size:13px;color:var(--weak)}
.rv-nav{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}
.guards{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.guard{text-align:center;padding:24px 14px;border-radius:16px;background:var(--glass);border:1px solid var(--glass-line);transition:.3s}
.guard:hover{transform:translateY(-4px);border-color:rgba(79,209,255,.4)}
.guard .ico{margin:0 auto 12px}
.guard h3{font-size:15px}
.guard p{color:var(--weak);font-size:12px;line-height:1.6;margin-top:6px}
.scene{display:grid;grid-template-columns:7fr 5fr;gap:20px}
.scene-main{position:relative;overflow:hidden;border-radius:20px;min-height:340px;border:1px solid var(--glass-line)}
.scene-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.scene-cap{position:absolute;left:0;right:0;bottom:0;padding:28px 24px;background:linear-gradient(transparent,rgba(6,9,18,.94))}
.scene-cap h3{font-size:20px}
.scene-cap p{color:var(--muted);font-size:14px;margin-top:6px}
.scene-side{display:grid;gap:20px}
.scene-side .card{display:flex;flex-direction:column;justify-content:center}
.scene-side h3{font-size:17px;margin-top:14px}
.scene-side p{color:var(--muted);font-size:14px;line-height:1.7;margin-top:8px}
.sync{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center}
.devices{display:flex;flex-wrap:wrap;gap:16px}
.device{width:76px;height:76px;border-radius:50%;display:grid;place-items:center;color:var(--muted);background:var(--glass);border:1px solid var(--glass-line);transition:.28s}
.device:hover{transform:translateY(-6px);border-color:var(--primary);color:var(--primary-l)}
.news{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.news-main{border-radius:var(--r-md);background:var(--glass);border:1px solid var(--glass-line);padding:18px;transition:.3s}
.news-main:hover{border-color:rgba(255,122,74,.45)}
.news-main img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px}
.news-main h3{font-size:19px;margin-top:16px;line-height:1.45}
.news-main p{color:var(--muted);font-size:14px;margin-top:8px}
.news-meta{display:flex;gap:14px;margin-top:14px;font-size:12px;color:var(--weak)}
.news-side{display:grid;gap:20px}
.news-mini{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center;padding:14px;border-radius:16px;background:var(--glass);border:1px solid var(--glass-line);transition:.3s}
.news-mini:hover{border-color:rgba(255,122,74,.45);transform:translateY(-3px)}
.news-mini img{width:120px;height:90px;object-fit:cover;border-radius:10px}
.news-mini h3{font-size:15px;line-height:1.5}
.news-mini span{display:block;font-size:12px;color:var(--weak);margin-top:6px}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric h3{font-size:15px;color:var(--muted);font-weight:600}
.metric-num{font-size:28px;font-weight:800;color:var(--text);margin-top:10px;font-variant-numeric:tabular-nums}
.metric-num em{font-style:normal;font-size:14px;color:var(--primary);margin-left:2px}
.metric .bar{margin-top:14px;height:6px}
.metric p{font-size:12px;color:var(--weak);margin-top:10px}
.cta-card{position:relative;overflow:hidden;border-radius:var(--r-lg);padding:clamp(30px,5vw,56px);background:var(--glass);border:1px solid var(--glass-line);backdrop-filter:blur(18px) saturate(120%);display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.cta-card::before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;top:-200px;right:-140px;background:radial-gradient(circle,rgba(255,107,74,.30),transparent 70%);pointer-events:none}
.cta-card h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.28;position:relative}
.cta-card p{color:var(--muted);font-size:15px;margin-top:12px;position:relative}
.cta-form{position:relative;display:flex;gap:10px}
.cta-form input{flex:1;min-height:48px;border-radius:999px;border:1px solid var(--glass-line);background:rgba(255,255,255,.05);color:var(--text);padding:0 20px;outline:none}
.cta-form input::placeholder{color:var(--weak)}
.cta-form input:focus{border-color:var(--cyan)}
.form-note{position:relative;font-size:12px;color:var(--weak);margin-top:12px}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);z-index:300;background:rgba(17,27,51,.96);border:1px solid rgba(79,209,255,.4);color:var(--text);padding:12px 22px;border-radius:999px;font-size:14px;opacity:0;pointer-events:none;transition:.3s;box-shadow:var(--shadow)}
.toast.show{opacity:1;transform:translate(-50%,0)}
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.3fr;gap:32px}
.footer-brand p{color:var(--muted);font-size:14px;line-height:1.8;margin-top:16px;max-width:300px}
.footer-col h3{font-size:14px;color:var(--text);margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:5px 0;transition:color .2s}
.footer-col a:hover{color:var(--primary-l)}
.sub-form{display:flex;gap:8px;margin-top:12px}
.sub-form input{flex:1;min-height:44px;border-radius:999px;border:1px solid var(--glass-line);background:rgba(255,255,255,.05);color:var(--text);padding:0 16px;outline:none;font-size:14px}
.sub-form input::placeholder{color:var(--weak)}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;margin-top:40px;padding-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--weak)}
.back-top{position:fixed;right:22px;bottom:26px;z-index:120;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:rgba(11,18,36,.9);border:1px solid rgba(255,107,74,.55);color:var(--primary);opacity:0;visibility:hidden;transform:translateY(12px);transition:.3s;backdrop-filter:blur(12px);box-shadow:0 0 20px rgba(255,107,74,.3)}
.back-top.show{opacity:1;visibility:visible;transform:none}
.js-on .reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.js-on .reveal.in{opacity:1;transform:none}
@media(min-width:1400px){.container{max-width:1320px}}
@media(max-width:1024px){
  .nav-desktop{display:none}
  .menu-btn{display:grid}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .split,.sync,.news,.scene,.cta-card{grid-template-columns:1fr;gap:28px}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .timeline::before{display:none}
  .stats{grid-template-columns:repeat(2,1fr);gap:28px}
  .ladder{grid-template-columns:1fr}
  .guards{grid-template-columns:repeat(3,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr 1fr}
  .review{flex:0 0 calc((100% - 20px)/2)}
  .chip-a{right:0}
  .chip-b{left:0}
}
@media(max-width:768px){
  .header-inner{height:60px}
  .brand-name{font-size:16px}
  .hero{min-height:auto;padding-top:calc(60px + 40px)}
  .hero-actions .btn{flex:1 1 auto}
  .section{padding:40px 0}
  .section-head{margin-bottom:28px}
  .pain-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr;gap:26px}
  .timeline::before{display:none}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .guards{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:1fr}
  .list-item{grid-template-columns:96px 1fr;gap:14px}
  .list-item img{width:96px}
  .list-meta{grid-column:2;justify-self:start}
  .review{flex:0 0 86%}
  .news-mini{grid-template-columns:96px 1fr}
  .news-mini img{width:96px;height:72px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-brand{grid-column:1 / -1}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .tbl{min-width:0}
  .tbl thead{display:none}
  .tbl,.tbl tbody,.tbl tr,.tbl td{display:block;width:100%}
  .tbl tr{border:1px solid var(--glass-line);border-radius:14px;margin-bottom:12px;padding:6px 4px;background:rgba(255,255,255,.03)}
  .tbl td{border-bottom:0;padding:8px 16px}
  .tbl td:first-child{width:auto;color:var(--cyan);font-size:13px;letter-spacing:.04em}
  .tbl td:nth-child(2)::before{content:"基础 · ";color:var(--weak)}
  .tbl td:nth-child(3)::before{content:"增强 · ";color:var(--primary-l)}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:27px}
  .hero-lead{font-size:15px}
  .stats{grid-template-columns:1fr 1fr}
  .guards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .scene-main{min-height:240px}
  .chip{position:static;transform:none;margin-top:12px;display:inline-block}
  .stage{padding:0}
  .stage-main{margin-bottom:8px}
  .toast{width:calc(100% - 32px);text-align:center;border-radius:16px}
  .back-top{right:14px;bottom:16px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .js-on .reveal{opacity:1;transform:none}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}