/* roulang page: index */
:root{
--caramel:#A6531F;--green:#1F4D46;--paper:#F7F2E9;--card:#FFFDF8;
--ink:#24211E;--muted:#6B6259;--line:#D8CFC2;--glow:#E7A15A;
--r:10px;--sh:0 1px 2px rgba(36,33,30,.07);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.7;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;line-height:1.28;font-family:"Noto Serif SC","Songti SC",SimSun,serif}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:var(--green);text-decoration:none}
button,input,select{font:inherit;color:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.thumb{position:relative;overflow:hidden;background:#EDE5D8;border-radius:8px}
.thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.tag{display:inline-block;font-size:12px;line-height:1.5;padding:1px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted);background:var(--paper)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;border-radius:8px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:background .18s,color .18s,border-color .18s,transform .18s}
.btn-main{background:var(--caramel);color:#fff}
.btn-main:hover{background:var(--green)}
.btn-ghost{background:transparent;border-color:var(--green);color:var(--green)}
.btn-ghost:hover{border-color:var(--caramel);color:var(--caramel)}
.btn:hover{transform:translateY(-1px)}
:focus-visible{outline:2px solid var(--glow);outline-offset:2px}
/* header */
.site-head{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);min-height:44px}
.logo{width:40px;height:40px;flex:none;border-radius:8px;background:var(--caramel);color:#fff;display:grid;place-items:center;font-family:"Noto Serif SC",Songti SC,serif;font-size:20px;font-weight:700}
.brand-name{font-family:"Noto Serif SC","Songti SC",serif;font-size:19px;font-weight:700;letter-spacing:.01em}
.live{display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:5px 11px;border-radius:999px;border:1px solid var(--line);color:var(--green);background:var(--paper)}
.live i{width:6px;height:6px;border-radius:50%;background:var(--caramel);display:block}
.navicons{display:flex;gap:8px;overflow-x:auto;padding-bottom:14px;scrollbar-width:none}
.navicons::-webkit-scrollbar{display:none}
.navicons a{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;min-height:44px;padding:0 15px;border:1px solid var(--line);border-radius:999px;background:var(--paper);color:var(--muted);font-size:14px;transition:background .18s,color .18s,border-color .18s}
.navicons a:hover{border-color:var(--green);color:var(--green)}
.navicons a.on{background:var(--green);border-color:var(--green);color:#fff}
.navicons svg{width:18px;height:18px;flex:none}
/* sections */
section{padding:72px 0}
section[id]{scroll-margin-top:100px}
.band{background:#FFFCF5;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{margin-bottom:34px;max-width:820px}
.sec-head .kicker{display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--caramel);margin-bottom:8px}
h2{font-size:30px;letter-spacing:.01em}
.sec-head p{margin-top:10px;color:var(--muted);font-size:15px}
/* hero */
.hero{position:relative;padding:56px 0 64px;border-bottom:1px solid var(--line);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:url("/assets/images/f294472c5788237f.jpg") center/cover no-repeat;opacity:.1}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.kicker-line{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--green);border:1px solid var(--line);background:var(--card);padding:5px 12px;border-radius:999px}
h1{font-size:52px;margin:16px 0 14px;letter-spacing:.01em}
h1 .hl{color:var(--caramel)}
.hero-sub{font-size:19px;font-weight:600}
.hero-text{margin-top:12px;color:var(--muted);font-size:15px;max-width:520px}
.hero-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.hero-panel{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.shot{margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh)}
.shot img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.shot:hover img{transform:scale(1.02)}
.shot figcaption{padding:6px 10px 8px;font-size:12px;color:var(--muted)}
.shot-a{grid-column:1/-1}
.shot-c{margin-top:14px}
.databox{grid-column:1/-1;display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#FDF3E6;border:1px solid var(--line);border-radius:var(--r);padding:12px 16px;font-size:13px;color:var(--muted)}
.databox b{font-family:"Noto Serif SC",Songti SC,serif;font-size:24px;color:var(--caramel);font-variant-numeric:tabular-nums;line-height:1}
/* metrics */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.mcard{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--caramel);border-radius:var(--r);padding:20px}
.mcard .num{font-family:"Noto Serif SC",Songti SC,serif;font-size:34px;color:var(--caramel);font-variant-numeric:tabular-nums;line-height:1.1}
.mcard .num small{font-size:13px;color:var(--muted);margin-left:4px;font-family:"Noto Sans SC",sans-serif}
.mcard .lab{font-weight:600;margin-top:8px;font-size:15px}
.mcard .desc{font-size:13px;color:var(--muted);margin-top:4px}
/* matrix */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cat{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;transition:border-color .18s}
.cat:hover{border-color:var(--green)}
.cat .ic{color:var(--green);line-height:0}
.cat .ic svg{width:24px;height:24px}
.cat h3{font-size:18px}
.cat p{font-size:14px;color:var(--muted)}
.cat .go{margin-top:auto;padding-top:8px;font-size:14px;font-weight:600;color:var(--caramel)}
/* latest */
.latest{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--glow);border-radius:var(--r);overflow:hidden;transition:border-color .18s}
.card:hover{border-color:var(--green)}
.card .thumb{border-radius:0}
.card .body{padding:12px 14px 16px}
.card h3{font-size:16px;line-height:1.4}
.card .meta{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.card .sc{color:var(--caramel);font-weight:700}
.badge{position:absolute;top:8px;left:8px;font-size:12px;padding:2px 8px;border-radius:6px;background:rgba(31,77,70,.92);color:#fff}
/* popular */
.popular{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.pcard{position:relative;display:grid;grid-template-columns:180px minmax(0,1fr);gap:16px;background:var(--card);border:1px solid var(--line);border-left:3px solid var(--green);border-radius:var(--r);padding:14px;transition:border-color .18s}
.pcard:hover{border-color:var(--caramel)}
.pcard .idx{position:absolute;top:-1px;left:-1px;background:var(--green);color:#fff;font-size:12px;line-height:1.6;padding:0 8px;border-radius:0 0 8px 0;font-variant-numeric:tabular-nums}
.pcard h3{font-size:17px;margin-top:2px}
.pcard p{font-size:13.5px;color:var(--muted);margin-top:6px}
.pcard .meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
/* rank */
.rank li{display:grid;grid-template-columns:48px minmax(0,1fr) 68px;align-items:center;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px 16px;margin-bottom:10px}
.rank li:last-child{margin-bottom:0}
.rk{width:34px;height:34px;display:grid;place-items:center;border-radius:8px;border:1px solid var(--green);color:var(--green);font-size:14px;font-weight:700;font-variant-numeric:tabular-nums}
.rank li:nth-child(-n+3) .rk{background:var(--caramel);border-color:var(--caramel);color:#fff}
.rank h3{font-size:16px}
.rank .meta{font-size:13px;color:var(--muted);margin-top:2px;font-variant-numeric:tabular-nums}
.rank .meta b{color:var(--green)}
.rs{text-align:right;color:var(--caramel);font-weight:700;font-size:18px;font-variant-numeric:tabular-nums}
/* compare */
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.cmp-col{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.cmp-ours{border-color:var(--green);box-shadow:0 2px 0 var(--green)}
.cmp-col h3{font-size:18px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.cmp li{display:grid;grid-template-columns:20px 1fr;gap:10px;align-items:start;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--muted)}
.cmp li:last-child{border-bottom:0;padding-bottom:0}
.cmp li b{color:var(--ink);font-weight:600}
.ic{width:20px;height:20px;display:grid;place-items:center;border-radius:50%;font-size:12px;font-weight:700;line-height:1;margin-top:2px}
.ic.no{background:#EFE7DA;color:var(--muted)}
.ic.no::before{content:"—"}
.ic.yes{background:rgba(31,77,70,.12);color:var(--green)}
.ic.yes::before{content:"✓"}
/* timeline */
.tl{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tl-item{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px 18px 18px}
.tl-item::before{content:"";position:absolute;top:-6px;left:16px;width:10px;height:10px;border-radius:50%;background:var(--paper);border:2px solid var(--caramel)}
.tl-item .st{font-size:12px;color:var(--caramel);letter-spacing:.1em;font-variant-numeric:tabular-nums}
.tl-item h3{font-size:17px;margin-top:4px}
.tl-item p{font-size:13.5px;color:var(--muted);margin-top:6px}
/* news */
.news{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.news li{display:grid;grid-template-columns:132px minmax(0,1fr);gap:14px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px;transition:border-color .18s}
.news li:hover{border-color:var(--green)}
.news .thumb{border-radius:6px}
.news .thumb img{aspect-ratio:4/3}
.news h3{font-size:16px;line-height:1.4}
.news p{font-size:13px;color:var(--muted);margin-top:6px}
.news time{display:block;font-size:12px;color:var(--caramel);margin-top:8px;font-variant-numeric:tabular-nums}
/* guard */
.guard{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.gitem{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--green);border-radius:var(--r);padding:20px}
.gitem .ic{color:var(--green);line-height:0;margin:0}
.gitem .ic svg{width:24px;height:24px}
.gitem h3{font-size:16px;margin-top:10px}
.gitem p{font-size:13.5px;color:var(--muted);margin-top:6px}
/* quick */
.qa{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.qrow{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.qrow h3{font-size:15px;color:var(--green)}
.qrow p{font-size:14px;color:var(--muted);margin-top:6px}
/* faq */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin-bottom:12px;overflow:hidden}
.faq details:last-child{margin-bottom:0}
.faq summary{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;min-height:44px;font-size:16px;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--caramel);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{color:var(--caramel)}
.faq .ans{padding:0 18px 18px;font-size:14.5px;color:var(--muted);background:#FCF7EE}
/* topics */
.topic{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tcard{display:block;color:inherit;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:border-color .18s}
.tcard:hover{border-color:var(--green)}
.tcard .thumb{border-radius:0}
.tcard .thumb img{aspect-ratio:3/2}
.tcard:hover .thumb img{transform:scale(1.02)}
.tcard .body{display:block;padding:14px 16px 18px}
.tcard h3{font-size:17px}
.tcard p{font-size:13.5px;color:var(--muted);margin-top:6px}
.tcard .more{display:inline-block;margin-top:10px;font-size:13.5px;font-weight:600;color:var(--caramel)}
/* devices */
.devices{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.dcard{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--caramel);border-radius:var(--r);padding:20px}
.dcard .ic{color:var(--caramel);line-height:0;margin:0}
.dcard .ic svg{width:24px;height:24px}
.dcard h3{font-size:16px;margin-top:10px}
.dcard p{font-size:13.5px;color:var(--muted);margin-top:6px}
/* subscribe */
.sub-form{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:14px;font-weight:600}
.field input[type=text],.field select{min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);transition:border-color .18s,background .18s}
.field input[type=text]:focus,.field select:focus{border-color:var(--green);background:#FCF7EE;outline:none}
.radios{display:flex;gap:14px;flex-wrap:wrap}
.radios label{display:inline-flex;align-items:center;gap:6px;min-height:44px;font-size:14px;font-weight:400}
input[type=radio],input[type=checkbox]{width:16px;height:16px;accent-color:var(--caramel)}
.consent{display:flex;align-items:flex-start;gap:8px;font-size:13.5px;color:var(--muted);margin-top:6px}
.form-foot{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:22px}
.form-note{font-size:12.5px;color:var(--muted)}
/* footer */
footer{border-top:1px solid var(--line);background:var(--card);padding:48px 0 24px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.fgrid h4{font-size:15px;margin-bottom:12px}
.fgrid p,.fgrid li{font-size:13.5px;color:var(--muted);line-height:1.9}
.fgrid a{color:var(--muted)}
.fgrid a:hover{color:var(--caramel)}
.copy{border-top:1px solid var(--line);margin-top:32px;padding-top:18px;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media(max-width:1024px){
h1{font-size:44px}
h2{font-size:26px}
.hero-grid{gap:32px}
.latest{grid-template-columns:repeat(3,1fr)}
.matrix,.metrics,.guard,.devices,.topic,.tl{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.hero{padding:44px 0 52px}
section{padding:56px 0}
.hero-grid{grid-template-columns:1fr}
.hero-text{max-width:none}
.latest{grid-template-columns:repeat(2,1fr)}
.popular{grid-template-columns:1fr}
.matrix{grid-template-columns:repeat(2,1fr)}
.news,.cmp,.qa{grid-template-columns:1fr}
.form-grid{grid-template-columns:1fr}
.fgrid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
h1{font-size:32px}
h2{font-size:23px}
.hero-panel{grid-template-columns:1fr}
.shot-a,.databox{grid-column:auto}
.shot-c{margin-top:0}
.latest{grid-template-columns:repeat(2,1fr);gap:14px}
.metrics,.matrix,.guard,.devices,.topic,.tl{grid-template-columns:1fr}
.pcard{grid-template-columns:1fr}
.news li{grid-template-columns:1fr}
.rank li{grid-template-columns:44px minmax(0,1fr) 56px;gap:10px;padding:12px}
.hero-actions .btn{flex:1 1 auto}
.sub-form{padding:20px}
.sub-form .btn{width:100%}
.fgrid{grid-template-columns:1fr}
}

/* 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}