/* roulang page: index */
:root{
  --ink:#0E1210;
  --field:#1F3D2E;
  --cit:#C7F04A;
  --sand:#F4F1E9;
  --sand2:#EAE5D8;
  --line:#D8D3C6;
  --body-text:#4A524D;
  --flame:#FF5C2B;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-lift:0 10px 28px rgba(14,18,16,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--sand);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--cit);outline-offset:2px}

.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

.num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .48s var(--ease),transform .48s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important}
}

/* ---------- 头部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(244,241,233,.92);border-bottom:1px solid var(--line);transition:box-shadow .2s var(--ease),background-color .2s var(--ease)}
.site-header.is-stuck{backdrop-filter:blur(10px);box-shadow:0 6px 20px rgba(14,18,16,.07);background:rgba(244,241,233,.86)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
@media (min-width:1024px){
  .header-inner{display:grid;grid-template-columns:1fr auto 1fr;height:74px}
}
.nav-left,.nav-right{display:none;align-items:center;gap:30px}
@media (min-width:1024px){
  .nav-left{display:flex;justify-content:flex-start}
  .nav-right{display:flex;justify-content:flex-end}
}
.nav-link{position:relative;padding:6px 2px;font-size:15px;color:var(--body-text);transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:50%;bottom:0;width:100%;height:2px;background:var(--cit);transform:translateX(-50%) scaleX(0);transform-origin:center;transition:transform .2s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:translateX(-50%) scaleX(1)}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{transform:translateX(-50%) scaleX(.42)}
.brand{display:inline-flex;align-items:center;gap:8px;font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-dot{width:8px;height:8px;border-radius:999px;background:var(--cit);display:inline-block;flex:0 0 auto}
.brand span.brand-rest{font-weight:800}
@media (max-width:359px){.brand{font-size:16px}}
.nav-toggle{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--ink);transition:border-color .2s var(--ease),background-color .2s var(--ease)}
.nav-toggle:hover{border-color:var(--ink)}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle .bars{position:relative;width:16px;height:10px}
.nav-toggle .bars i{position:absolute;left:0;width:16px;height:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle .bars i:nth-child(1){top:0}
.nav-toggle .bars i:nth-child(2){top:4px}
.nav-toggle .bars i:nth-child(3){top:8px}
.nav-toggle[aria-expanded="true"] .bars i:nth-child(1){transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .bars i:nth-child(3){transform:translateY(-4px) rotate(-45deg)}

.mobile-panel{position:fixed;top:72px;left:0;right:0;z-index:55;background:var(--sand);border-bottom:1px solid var(--line);max-height:78vh;overflow-y:auto;transform:translateY(-12px);opacity:0;visibility:hidden;transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s}
.mobile-panel.is-open{opacity:1;visibility:visible;transform:none}
.mobile-inner{padding:8px 20px 24px}
.mobile-link{display:block;padding:16px 0;font-size:18px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-link.active{color:var(--ink)}
.mobile-link.active::before{content:"";display:inline-block;width:8px;height:8px;border-radius:999px;background:var(--cit);margin-right:10px;vertical-align:middle}
.mobile-cta{display:flex;width:100%;margin-top:20px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:999px;font-size:15px;font-weight:600;line-height:1.2;border:1px solid transparent;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease)}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-lift)}
.btn:active{transform:translateY(0);box-shadow:none}
.btn-primary{background:var(--cit);color:var(--ink)}
.btn-primary:hover{background:#b6e336}
.btn-ghost{border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--sand)}
.btn-dark{background:var(--ink);color:var(--sand)}
.btn-dark:hover{background:#000}
.btn-outline-light{border-color:rgba(244,241,233,.45);color:var(--sand)}
.btn-outline-light:hover{background:var(--sand);color:var(--ink);border-color:var(--sand)}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- 徽章 / 标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--sand2);color:var(--ink);font-size:12.5px;font-weight:600;letter-spacing:.02em}
.badge-cit{background:var(--cit);color:var(--ink)}
.badge-flame{background:#FFE7DF;color:var(--flame)}
.tag{display:inline-block;padding:3px 10px;border:1px solid var(--line);border-radius:999px;font-size:12.5px;color:var(--body-text)}

/* ---------- 区块 ---------- */
.section{padding:80px 0}
@media (min-width:768px){.section{padding:104px 0}}
.sec-sand{background:var(--sand)}
.sec-sand2{background:var(--sand2)}
.sec-dark{background:var(--field);color:var(--sand)}
.section-head{max-width:760px;margin-bottom:44px}
.section-title{font-size:clamp(24px,3.2vw,34px);font-weight:700;letter-spacing:-.015em;line-height:1.3}
.section-desc{margin-top:14px;color:var(--body-text);font-size:16px}
.sec-dark .section-desc{color:rgba(244,241,233,.75)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--body-text);text-transform:uppercase}
.eyebrow .dot{width:8px;height:8px;border-radius:999px;background:var(--cit)}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- Hero ---------- */
.hero{position:relative;background-color:var(--sand);background-image:linear-gradient(90deg,rgba(244,241,233,.96) 0%,rgba(244,241,233,.86) 46%,rgba(244,241,233,.55) 100%),url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;overflow:hidden}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line)}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:44px;padding-top:64px;padding-bottom:72px}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:7fr 5fr;gap:56px;padding-top:88px;padding-bottom:96px;align-items:center}
}
.hero h1{font-size:clamp(30px,5vw,58px);font-weight:800;line-height:1.14;letter-spacing:-.02em;margin-top:18px;max-width:14em}
.hero-sub{margin-top:20px;font-size:18px;font-weight:600;color:var(--ink)}
.hero-meta{margin-top:14px;font-size:13.5px;color:var(--body-text);letter-spacing:.01em}
.hero-cta{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:30px;max-width:520px}
.hero-cta .btn{width:100%;padding:13px 16px}
@media (max-width:520px){.hero-cta .btn{font-size:14px;padding:12px 10px}}
.hero-note{margin-top:18px;font-size:14px;color:var(--body-text);max-width:34em}
.hero-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px}
.qr-card{display:flex;flex-direction:column;gap:16px}
.qr-box{width:120px;height:120px;border:1px solid var(--line);border-radius:var(--radius-img);overflow:hidden;background:var(--sand2)}
.qr-box img{width:100%;height:100%;object-fit:cover}
.qr-caption{font-size:13px;color:var(--body-text)}
.hero-list{margin-top:6px;display:grid;gap:12px}
.hero-list li{display:flex;gap:12px;font-size:14.5px;color:var(--body-text);line-height:1.7}
.hero-list li b{color:var(--ink);font-weight:700}
.hero-list .idx{flex:0 0 auto;width:24px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;color:var(--ink);padding-top:1px}

/* ---------- 截图轮播 ---------- */
.rail-wrap{position:relative}
.rail{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 8px;scrollbar-width:none;-ms-overflow-style:none}
.rail::-webkit-scrollbar{display:none}
.shot{flex:0 0 88%;scroll-snap-align:start;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.shot:hover{border-color:var(--ink);box-shadow:var(--shadow-lift)}
@media (min-width:768px){.shot{flex:0 0 calc((100% - 40px)/3)}}
@media (min-width:1280px){.shot{flex:0 0 calc((100% - 60px)/3.4)}}
.shot-frame{padding:10px 10px 0}
.shot-window{border:1px solid var(--line);border-radius:var(--radius-img);overflow:hidden;background:var(--sand)}
.shot-bar{display:flex;align-items:center;gap:6px;padding:8px 10px;border-bottom:1px solid var(--line);background:var(--sand2)}
.shot-bar i{width:7px;height:7px;border-radius:999px;background:#c4bfae;display:block}
.shot-bar span{margin-left:8px;flex:1;height:8px;border-radius:999px;background:rgba(216,211,198,.85)}
.shot-media{aspect-ratio:16/10;overflow:hidden}
.shot-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.shot:hover .shot-media img{transform:scale(1.03)}
.shot-copy{padding:18px 20px 22px}
.shot-copy h3{font-size:19px;font-weight:600}
.shot-copy p{margin-top:8px;font-size:14.5px;color:var(--body-text)}
.rail-ctrl{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:26px;flex-wrap:wrap}
.rail-dots{display:flex;align-items:center;gap:9px}
.rail-dot{width:9px;height:9px;border-radius:999px;background:var(--line);transition:background-color .2s var(--ease),width .2s var(--ease)}
.rail-dot.active{background:var(--ink);width:26px}
.rail-actions{display:flex;align-items:center;gap:10px}
.rail-btn{width:42px;height:42px;border:1px solid var(--line);border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-size:16px;color:var(--ink);background:#fff;transition:border-color .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease)}
.rail-btn:hover{border-color:var(--ink);background:var(--ink);color:var(--sand)}
.rail-toggle{width:auto;padding:0 18px;gap:8px;font-size:14px}

/* ---------- 编号价值条 ---------- */
.value-list{display:grid;gap:0;border-top:1px solid var(--line)}
.value-item{display:grid;grid-template-columns:auto 1fr;gap:22px;padding:34px 0;border-bottom:1px solid var(--line)}
.value-item .vnum{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1;color:var(--ink);letter-spacing:-.03em}
.value-item h3{font-size:21px;font-weight:600}
.value-item p{margin-top:10px;color:var(--body-text);font-size:15.5px;max-width:60ch}
.value-item .vline{height:1px;background:var(--line);margin-top:16px;max-width:120px}
@media (min-width:1024px){
  .value-item{grid-template-columns:140px 1fr;padding:42px 0}
}

/* ---------- 系统要求 ---------- */
.spec-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.spec-grid{grid-template-columns:repeat(2,1fr)}}
.spec-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px 24px 20px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.spec-card:hover{border-color:var(--ink);box-shadow:var(--shadow-lift);transform:translateY(-2px)}
.spec-card h3{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700}
.spec-card h3 .mark{width:8px;height:8px;border-radius:999px;background:var(--cit)}
.spec-rows{margin-top:18px;display:grid;gap:12px}
.spec-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:12px;border-bottom:1px dashed var(--line);font-size:14.5px}
.spec-row:last-child{border-bottom:0;padding-bottom:0}
.spec-row dt{color:var(--body-text)}
.spec-row dd{margin:0;font-family:ui-monospace,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;font-weight:600;text-align:right;color:var(--ink)}
.spec-foot{margin-top:16px;font-size:13px;color:var(--body-text)}

/* ---------- 评价墙 ---------- */
.review-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.review-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){
  .review-grid{grid-template-columns:repeat(3,1fr)}
  .review-wide{grid-column:span 2}
}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;display:flex;flex-direction:column;gap:16px;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.review-card:hover{border-color:var(--ink);box-shadow:var(--shadow-lift);transform:translateY(-2px)}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{width:42px;height:42px;border-radius:999px;background:var(--sand2);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:var(--field);flex:0 0 auto}
.review-name{font-size:15px;font-weight:700}
.review-term{font-size:12.5px;color:var(--body-text)}
.review-text{font-size:15.5px;color:var(--ink);flex:1}
.review-wide .review-text{font-size:17px}
.review-time{font-size:12.5px;color:var(--body-text);font-family:ui-monospace,Menlo,Consolas,monospace}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;text-align:left;padding:24px 4px;font-size:17px;font-weight:600;color:var(--ink);transition:color .2s var(--ease)}
.faq-q:hover{color:var(--field)}
.faq-q .ico{flex:0 0 auto;width:22px;height:22px;position:relative}
.faq-q .ico::before,.faq-q .ico::after{content:"";position:absolute;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.faq-q .ico::before{left:0;top:10px;width:22px;height:2px}
.faq-q .ico::after{left:10px;top:0;width:2px;height:22px}
.faq-item.is-open .faq-q .ico::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a-inner{padding:0 4px 26px;color:var(--body-text);font-size:15.5px;max-width:74ch}

/* ---------- 深色下载区 ---------- */
.cta-dark{background:var(--field);color:var(--sand);position:relative;overflow:hidden}
.cta-dark .grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
@media (min-width:1024px){.cta-dark .grid{grid-template-columns:1fr 1fr;gap:56px}}
.cta-dark h2{font-size:clamp(24px,3.4vw,36px);font-weight:800;line-height:1.25;letter-spacing:-.02em}
.cta-dark h2 em{font-style:normal;color:var(--cit)}
.cta-dark p{margin-top:16px;color:rgba(244,241,233,.75);font-size:15.5px;max-width:46ch}
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.dl-grid .btn{width:100%}
.dl-note{margin-top:18px;font-size:13px;color:rgba(244,241,233,.6)}
.dl-note a{color:var(--cit);text-decoration:underline;text-underline-offset:3px}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:1fr;gap:28px}
@media (min-width:1024px){.news-grid{grid-template-columns:1.15fr 1fr;gap:44px}}
.news-feature{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease)}
.news-feature:hover{border-color:var(--ink);box-shadow:var(--shadow-lift);transform:translateY(-2px)}
.news-feature .media{aspect-ratio:16/9;overflow:hidden}
.news-feature .media img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.news-feature:hover .media img{transform:scale(1.03)}
.news-feature .body{padding:22px 24px 26px}
.news-feature h3{margin-top:14px;font-size:21px;font-weight:700;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-feature .excerpt{margin-top:12px;color:var(--body-text);font-size:15px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:14px;margin-top:16px;font-size:12.5px;color:var(--body-text)}
.news-rows{border-top:1px solid var(--line)}
.news-row{display:flex;align-items:center;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);transition:transform .2s var(--ease)}
.news-row:hover{transform:translateX(3px)}
.news-row .rnum{flex:0 0 auto;width:34px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;color:var(--body-text)}
.news-row .rtitle{flex:1;font-size:15.5px;font-weight:600;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row:hover .rtitle{text-decoration:underline;text-decoration-color:var(--cit);text-decoration-thickness:2px;text-underline-offset:4px}
.news-row .rtime{flex:0 0 auto;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12.5px;color:var(--body-text)}
.empty-state{border:1px dashed var(--line);border-radius:var(--radius-card);padding:52px 24px;text-align:center;background:#fff}
.empty-state .ring{width:52px;height:52px;margin:0 auto 18px;border:1px solid var(--line);border-radius:999px;display:flex;align-items:center;justify-content:center}
.empty-state .ring i{width:12px;height:12px;border-radius:999px;background:var(--cit);display:block}
.empty-state p{color:var(--body-text);font-size:15px}
.empty-state .btn{margin-top:20px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--sand);border-top:2px solid var(--cit)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px;padding:64px 0 40px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.2fr 1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:56px}}
.footer-brand{display:inline-flex;align-items:center;gap:8px;font-size:18px;font-weight:800;color:var(--sand)}
.footer-brand .brand-dot{background:var(--cit)}
.footer-about{margin-top:16px;font-size:14px;color:rgba(244,241,233,.66);max-width:30ch}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--cit);text-transform:uppercase}
.footer-col ul{margin-top:16px;display:grid;gap:11px}
.footer-col a{font-size:14.5px;color:rgba(244,241,233,.78);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--cit)}
.footer-version{margin-top:16px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;color:rgba(244,241,233,.6);display:grid;gap:8px}
.footer-bottom{border-top:1px solid rgba(244,241,233,.14);padding:20px 0 32px;display:flex;flex-wrap:wrap;gap:14px 24px;align-items:center;justify-content:space-between}
.footer-bottom p{font-size:13px;color:rgba(244,241,233,.6)}
.to-top{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border:1px solid var(--cit);border-radius:999px;color:var(--cit);font-size:13.5px;transition:background-color .2s var(--ease),color .2s var(--ease)}
.to-top:hover{background:var(--cit);color:var(--ink)}

/* roulang page: article */
:root{
    --ink:#0E1210;
    --pitch:#1F3D2E;
    --lime:#C7F04A;
    --lime-deep:#B3DC38;
    --sand:#F4F1E9;
    --sand-2:#EAE5D8;
    --line:#D8D3C6;
    --text:#4A524D;
    --flare:#FF5C2B;
    --white:#FFFFFF;
    --radius-card:14px;
    --radius-btn:10px;
    --radius-img:12px;
    --shadow-lift:0 10px 28px rgba(14,18,16,.10);
    --shadow-soft:0 2px 10px rgba(14,18,16,.05);
    --pad-x:20px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--sand);
    color:var(--text);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
  :focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
  .num{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

  .container{width:100%;max-width:1180px;margin:0 auto;padding:0 var(--pad-x)}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:rgba(244,241,233,.9);
    border-bottom:1px solid var(--line);
    backdrop-filter:saturate(160%) blur(10px);
    -webkit-backdrop-filter:saturate(160%) blur(10px);
    transition:box-shadow .2s ease,background .2s ease;
  }
  .site-header.is-scrolled{box-shadow:0 4px 18px rgba(14,18,16,.07);background:rgba(244,241,233,.96)}
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
  .nav-left,.nav-right{display:flex;align-items:center;gap:28px;flex:1 1 0}
  .nav-right{justify-content:flex-end}
  .nav-link{
    position:relative;font-size:15px;font-weight:500;color:var(--text);
    padding:6px 2px;transition:color .2s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
    border-radius:2px;transform:scaleX(0);transition:transform .2s ease;
  }
  .nav-link:hover{color:var(--ink)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{color:var(--ink);font-weight:700}
  .nav-link.active::after{transform:scaleX(1)}
  .brand{
    display:inline-flex;align-items:center;gap:9px;
    font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink);
    white-space:nowrap;flex:0 0 auto;
  }
  .brand-rest{font-weight:700;color:var(--pitch)}
  .brand-dot{
    width:9px;height:9px;border-radius:3px;background:var(--lime);
    box-shadow:0 0 0 3px rgba(199,240,74,.30);display:inline-block;
  }
  .nav-toggle{
    display:none;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink);
    border:1px solid var(--line);border-radius:var(--radius-btn);padding:8px 12px;background:rgba(255,255,255,.6);
  }
  .nav-toggle .bars{display:inline-flex;flex-direction:column;gap:3px}
  .nav-toggle .bars i{display:block;width:15px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
  .nav-toggle[aria-expanded="true"] .bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .bars i:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

  .mobile-panel{
    position:fixed;top:72px;left:0;right:0;bottom:0;z-index:70;
    background:var(--sand);border-top:1px solid var(--line);
    padding:22px var(--pad-x) 32px;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .22s ease,opacity .22s ease;
    overflow-y:auto;
  }
  .mobile-panel.is-open{transform:none;opacity:1;pointer-events:auto}
  .mobile-nav{display:flex;flex-direction:column;margin-bottom:22px}
  .mobile-nav a{
    padding:16px 2px;font-size:17px;font-weight:600;color:var(--text);
    border-bottom:1px solid var(--line);
  }
  .mobile-nav a.active,.mobile-nav a:hover{color:var(--ink);padding-left:6px;transition:padding .2s ease,color .2s ease}
  body.no-scroll{overflow:hidden}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:700;line-height:1;padding:14px 22px;
    border-radius:var(--radius-btn);border:1px solid transparent;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  }
  .btn-primary{background:var(--lime);color:var(--ink);border-radius:999px}
  .btn-primary:hover{background:var(--lime-deep);transform:translateY(-1px);box-shadow:var(--shadow-lift)}
  .btn-primary:active{transform:translateY(0);box-shadow:none}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);border-radius:999px}
  .btn-ghost:hover{background:var(--ink);color:var(--sand);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-text{color:var(--ink);font-weight:700;padding:6px 0;border-radius:0;border-bottom:2px solid var(--lime)}
  .btn-text:hover{border-bottom-color:var(--ink)}

  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;font-weight:600;line-height:1;
    padding:7px 12px;border-radius:999px;background:var(--sand-2);color:var(--ink);
  }
  .badge-lime{background:var(--lime);color:var(--ink)}
  .badge-flare{background:rgba(255,92,43,.12);color:var(--flare)}

  /* ---------- article head ---------- */
  .article-hero{padding:40px 0 46px;border-bottom:1px solid var(--line)}
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text);margin-bottom:24px}
  .crumbs a{color:var(--text);border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
  .crumbs a:hover{color:var(--ink);border-bottom-color:var(--lime)}
  .crumbs .sep{color:#A9A69B}
  .crumbs .current{color:#8D8C84;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  .article-head-grid{display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center}
  .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:18px}
  .meta-row .time{font-size:13.5px;color:#7C847E}
  h1.article-title{
    font-size:clamp(30px,4.4vw,52px);line-height:1.22;font-weight:800;
    letter-spacing:-.02em;color:var(--ink);margin-bottom:20px;
  }
  .title-rule{width:76px;height:4px;background:var(--lime);border-radius:2px;margin-bottom:22px}
  .article-lead{font-size:16.5px;line-height:1.9;color:var(--text);max-width:640px}
  .head-figure{
    border:1px solid var(--line);border-radius:var(--radius-img);overflow:hidden;
    background:var(--sand-2);box-shadow:var(--shadow-soft);
  }
  .head-figure img{width:100%;aspect-ratio:16/11;object-fit:cover}

  /* ---------- layout ---------- */
  .article-main{padding:56px 0 72px}
  .article-layout{
    display:grid;grid-template-columns:minmax(0,760px) 268px;
    gap:60px;justify-content:center;align-items:start;
  }
  .toc-toggle-mobile{display:none}

  .article-body{
    font-size:17px;line-height:1.85;color:#3F4742;
    counter-reset:h3c;
    word-break:break-word;
  }
  .article-body > *:first-child{margin-top:0}
  .article-body p{margin:0 0 1.2em}
  .article-body h2{
    font-size:clamp(23px,2.6vw,29px);font-weight:700;letter-spacing:-.01em;color:var(--ink);
    margin:46px 0 16px;padding-left:16px;border-left:3px solid var(--lime);line-height:1.4;
    scroll-margin-top:96px;
  }
  .article-body h3{
    font-size:20.5px;font-weight:600;color:var(--ink);margin:34px 0 12px;line-height:1.5;
    scroll-margin-top:96px;
  }
  .article-body h3::before{
    counter-increment:h3c;content:counter(h3c,decimal-leading-zero);
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:14px;color:#8FA36A;margin-right:10px;
  }
  .article-body h4{font-size:17.5px;font-weight:600;color:var(--ink);margin:26px 0 10px}
  .article-body ul,.article-body ol{margin:0 0 1.2em;padding:0 0 0 4px;list-style:none}
  .article-body ol{counter-reset:oli;padding-left:0}
  .article-body ul li{position:relative;padding-left:22px;margin-bottom:10px}
  .article-body ul li::before{
    content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;
    background:var(--lime);border-radius:2px;
  }
  .article-body ol li{position:relative;padding-left:34px;margin-bottom:10px;counter-increment:oli}
  .article-body ol li::before{
    content:counter(oli,decimal-leading-zero);
    position:absolute;left:0;top:0;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:13px;color:var(--pitch);font-weight:700;
  }
  .article-body a{
    color:var(--pitch);font-weight:600;
    text-decoration:underline;text-decoration-color:var(--lime);
    text-decoration-thickness:2px;text-underline-offset:3px;
    transition:background .2s ease;
  }
  .article-body a:hover{background:rgba(199,240,74,.38)}
  .article-body blockquote{
    background:var(--sand-2);border-left:4px solid var(--pitch);
    border-radius:0 var(--radius-img) var(--radius-img) 0;
    padding:20px 24px;margin:26px 0;color:var(--ink);font-size:16.5px;
  }
  .article-body blockquote p:last-child{margin-bottom:0}
  .article-body img{
    width:100%;height:auto;border-radius:var(--radius-img);
    border:1px solid var(--line);margin:26px auto;
  }
  .article-body figure{margin:26px 0}
  .article-body figcaption{
    text-align:center;font-size:13px;color:#8D8C84;margin-top:10px;
  }
  .article-body table{
    width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
    border:1px solid var(--line);border-radius:var(--radius-img);overflow:hidden;
  }
  .article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
  .article-body th{background:var(--sand-2);color:var(--ink);font-weight:600}
  .article-body tbody tr:nth-child(even){background:rgba(234,229,216,.45)}
  .article-body tbody tr:last-child td{border-bottom:0}
  .article-body code{
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
    font-size:14px;background:var(--sand-2);padding:2px 6px;border-radius:6px;color:var(--pitch);
  }
  .article-body pre{
    background:var(--ink);color:var(--sand);padding:18px 20px;border-radius:var(--radius-img);
    overflow-x:auto;font-size:14px;line-height:1.7;margin:24px 0;
  }
  .article-body pre code{background:none;color:inherit;padding:0}
  .article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}

  /* ---------- sidebar ---------- */
  .article-side{position:sticky;top:100px;display:flex;flex-direction:column;gap:18px}
  .side-card{
    border:1px solid var(--line);border-radius:var(--radius-card);
    background:rgba(255,255,255,.7);padding:20px;
  }
  .side-card h3{font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.04em;margin-bottom:14px}
  .toc-list{display:flex;flex-direction:column}
  .toc-list a{
    display:block;font-size:14px;line-height:1.6;color:var(--text);
    padding:8px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
    transition:color .2s ease,border-color .2s ease,background .2s ease;
  }
  .toc-list a:hover{color:var(--ink);border-left-color:var(--lime);background:rgba(199,240,74,.14)}
  .toc-list a.is-active{color:var(--ink);font-weight:700;border-left-color:var(--lime);background:rgba(199,240,74,.18)}
  .toc-list a.lv3{padding-left:22px;font-size:13.5px;color:#6E7671}
  .side-actions{display:flex;flex-direction:column;gap:10px}

  /* ---------- empty ---------- */
  .empty-state{
    border:1px dashed var(--line);border-radius:var(--radius-card);
    background:rgba(255,255,255,.6);padding:52px 28px;text-align:center;
  }
  .empty-title{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:10px}
  .empty-desc{font-size:15px;color:var(--text);margin-bottom:22px}

  /* ---------- footer blocks ---------- */
  .tail-bar{
    display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
    margin-top:56px;padding-top:28px;border-top:1px solid var(--line);
  }
  .tail-bar .tail-hint{font-size:14px;color:#7C847E}

  .continue-section{padding:0 0 76px}
  .continue-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .continue-card{
    display:flex;gap:18px;align-items:center;
    border:1px solid var(--line);border-radius:var(--radius-card);
    background:var(--white);padding:18px;
    transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  }
  .continue-card:hover{border-color:var(--ink);box-shadow:var(--shadow-lift);transform:translateY(-2px)}
  .continue-card .thumb{
    width:104px;flex:0 0 104px;aspect-ratio:4/3;border-radius:var(--radius-img);overflow:hidden;background:var(--sand-2);
  }
  .continue-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
  .continue-card:hover .thumb img{transform:scale(1.04)}
  .continue-card h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:6px}
  .continue-card p{font-size:14px;line-height:1.7;color:var(--text)}
  .continue-card .go{font-size:13px;font-weight:700;color:var(--pitch);margin-top:10px;display:inline-block;border-bottom:2px solid var(--lime)}

  /* ---------- dark cta ---------- */
  .cta-dark{background:var(--pitch);color:var(--sand);padding:72px 0;border-top:2px solid var(--lime)}
  .cta-dark-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
  .cta-dark h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;letter-spacing:-.01em;color:var(--sand);line-height:1.3;margin-bottom:16px}
  .cta-dark p{color:rgba(244,241,233,.78);font-size:16px;max-width:520px}
  .cta-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .cta-actions .btn{width:100%}
  .cta-actions .btn-ghost{color:var(--sand);border-color:rgba(244,241,233,.55)}
  .cta-actions .btn-ghost:hover{background:var(--sand);color:var(--ink)}
  .cta-note{margin-top:18px;font-size:13px;color:rgba(244,241,233,.62)}

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink);color:var(--sand);padding:60px 0 26px;border-top:2px solid var(--lime)}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
  .footer-brand{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:800;color:var(--sand);margin-bottom:14px}
  .footer-about{font-size:14px;line-height:1.8;color:rgba(244,241,233,.66);max-width:280px}
  .footer-col h4{font-size:14px;font-weight:700;color:var(--sand);margin-bottom:16px;letter-spacing:.03em}
  .footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
  .footer-col a{font-size:14px;color:rgba(244,241,233,.68);transition:color .2s ease}
  .footer-col a:hover{color:var(--lime)}
  .footer-version{display:flex;flex-direction:column;gap:9px;font-size:13.5px;color:rgba(244,241,233,.66);
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
  .footer-bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid rgba(244,241,233,.16);
    display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  }
  .footer-bottom p{font-size:13px;color:rgba(244,241,233,.55)}
  .to-top{
    font-size:13px;font-weight:700;color:var(--lime);border:1px solid var(--lime);
    border-radius:999px;padding:8px 16px;transition:background .2s ease,color .2s ease,transform .2s ease;
  }
  .to-top:hover{background:var(--lime);color:var(--ink);transform:translateY(-1px)}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .48s ease-out,transform .48s ease-out}
  .reveal.is-in{opacity:1;transform:none}

  @media (max-width:1023px){
    .nav-left,.nav-right{display:none}
    .nav-toggle{display:inline-flex}
    .header-inner{height:68px}
    .brand{font-size:17px}
    .mobile-panel{top:68px}
    .article-head-grid{grid-template-columns:1fr;gap:28px}
    .head-figure{order:-1}
    .article-layout{grid-template-columns:1fr;gap:32px}
    .article-side{position:static}
    .toc-toggle-mobile{
      display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--ink);
      border:1px solid var(--line);border-radius:999px;padding:10px 16px;background:rgba(255,255,255,.7);
      margin-bottom:14px;
    }
    .side-card.toc-card .toc-list{max-height:0;overflow:hidden;transition:max-height .24s ease}
    .side-card.toc-card.is-open .toc-list{max-height:640px;overflow:auto}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
    .cta-dark-grid{grid-template-columns:1fr;gap:28px}
    :root{--pad-x:20px}
  }
  @media (min-width:768px){
    :root{--pad-x:32px}
  }
  @media (max-width:767px){
    .article-hero{padding:28px 0 34px}
    .article-main{padding:36px 0 52px}
    .continue-grid{grid-template-columns:1fr}
    .continue-card{flex-direction:column;align-items:flex-start}
    .continue-card .thumb{width:100%;flex:none}
    .cta-actions{grid-template-columns:1fr 1fr}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;align-items:flex-start}
  }
  @media (max-width:520px){
    .cta-actions{grid-template-columns:1fr}
    .article-body{font-size:16.5px}
    .tail-bar{flex-direction:column;align-items:stretch}
    .tail-bar .btn{width:100%}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition-duration:.001ms !important;animation-duration:.001ms !important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category1 */
:root{
    --hgreen:#C7F04A;
    --hgreen-dark:#B9E23C;
    --ink:#0E1210;
    --field:#1F3D2E;
    --sand:#F4F1E9;
    --sand2:#EAE5D8;
    --card:#FCFAF4;
    --line:#D8D3C6;
    --body:#4A524D;
    --muted:#6E7669;
    --flame:#FF5C2B;
    --radius-card:14px;
    --radius-btn:10px;
    --shadow-hover:0 10px 28px rgba(14,18,16,.10);
    --mono:ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--sand);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
    font-size:16.5px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  body.menu-open{overflow:hidden}
  img{max-width:100%;display:block;height:auto}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
  p{margin:0}
  :focus-visible{outline:2px solid var(--hgreen);outline-offset:2px;border-radius:4px}

  .container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container{padding:0 32px}}

  .num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(244,241,233,.92);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease,background-color .2s ease;
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px rgba(14,18,16,.07)}
  .header-inner{
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    min-height:72px;
    gap:16px;
  }
  .nav-left,.nav-right{display:flex;align-items:center;gap:28px}
  .nav-right{justify-content:flex-end}
  .nav-link{
    position:relative;
    font-size:15px;
    font-weight:500;
    color:var(--body);
    padding:6px 2px;
    transition:color .2s ease;
    white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
    background:var(--hgreen);
    transform:scaleX(0);
    transform-origin:center;
    transition:transform .2s ease-out;
  }
  .nav-link:hover{color:var(--ink)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.active{color:var(--ink);font-weight:700}
  .nav-link.active::after{transform:scaleX(1)}

  .brand{
    justify-self:center;
    display:inline-flex;align-items:center;gap:8px;
    font-size:19px;font-weight:800;letter-spacing:-.02em;
    white-space:nowrap;color:var(--ink);
  }
  .brand-dot{
    width:8px;height:8px;border-radius:2px;background:var(--hgreen);
    display:inline-block;flex:none;
  }
  .brand-rest{color:var(--field)}

  .nav-toggle{
    display:none;align-items:center;gap:8px;
    padding:8px 12px;border:1px solid var(--line);border-radius:10px;
    font-size:14px;font-weight:600;color:var(--ink);
    background:rgba(255,255,255,.5);
    transition:border-color .2s ease,background-color .2s ease;
  }
  .nav-toggle:hover{border-color:var(--ink)}
  .nav-toggle .bars{display:inline-flex;flex-direction:column;gap:4px}
  .nav-toggle .bars i{display:block;width:16px;height:2px;background:var(--ink);border-radius:1px}

  .mobile-panel{
    position:fixed;top:0;left:0;right:0;z-index:45;
    background:var(--sand);
    border-bottom:1px solid var(--line);
    padding:88px 0 24px;
    transform:translateY(-102%);
    transition:transform .3s ease;
    max-height:88vh;overflow:auto;
  }
  .mobile-panel.open{transform:translateY(0)}
  .mp-nav{display:flex;flex-direction:column}
  .mp-link{
    padding:16px 4px;font-size:19px;font-weight:600;color:var(--ink);
    border-bottom:1px solid var(--line);
  }
  .mp-link.active{color:var(--field)}
  .mp-link.active::before{content:"";display:inline-block;width:8px;height:8px;background:var(--hgreen);border-radius:2px;margin-right:10px;vertical-align:middle}
  .mp-cta{margin-top:20px;width:100%}

  @media (max-width:1023px){
    .header-inner{display:flex;justify-content:space-between}
    .nav-left,.nav-right{display:none}
    .brand{font-size:17px}
    .nav-toggle{display:inline-flex}
  }
  @media (max-width:520px){
    .brand{font-size:15.5px;gap:6px}
    .brand-dot{width:6px;height:6px}
    .nav-toggle span:last-child{display:none}
  }

  /* ---------- hero ---------- */
  .cat-hero{
    position:relative;
    padding:28px 0 52px;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  .cat-hero::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(100deg,rgba(244,241,233,.97) 0%,rgba(244,241,233,.92) 46%,rgba(244,241,233,.74) 100%);
  }
  .cat-hero > .container{position:relative;z-index:1}

  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:26px}
  .crumbs a{transition:color .2s ease}
  .crumbs a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--hgreen);text-underline-offset:4px}
  .crumbs .sep{color:var(--line)}
  .crumbs .current{color:var(--ink);font-weight:600}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--hgreen);color:var(--ink);
    font-size:13px;font-weight:700;letter-spacing:.02em;
    padding:5px 12px;border-radius:999px;
  }
  .cat-hero h1{
    margin:18px 0 16px;
    font-size:clamp(30px,5vw,54px);
    font-weight:800;
    letter-spacing:-.02em;
    line-height:1.16;
    max-width:15em;
  }
  .cat-hero .lede{max-width:44em;color:var(--body);font-size:17px}
  .hero-meta{
    margin-top:24px;display:flex;flex-wrap:wrap;gap:10px 0;align-items:center;
    font-size:13.5px;color:var(--field);font-weight:600;
  }
  .hero-meta span{padding:0 14px;border-right:1px solid var(--line)}
  .hero-meta span:first-child{padding-left:0}
  .hero-meta span:last-child{border-right:0}

  /* ---------- sections ---------- */
  .section{padding:clamp(56px,8vw,96px) 0}
  .section-alt{background:var(--sand2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .section-head{max-width:44em;margin-bottom:44px}
  .section-head .kicker{
    display:inline-block;font-family:var(--mono);font-size:13px;font-weight:700;
    color:var(--field);letter-spacing:.14em;text-transform:uppercase;margin-bottom:12px;
  }
  .section-head h2{font-size:clamp(25px,3.2vw,34px);font-weight:700;margin-bottom:12px}
  .section-head p{color:var(--body);font-size:16px}

  /* ---------- doc layout ---------- */
  .doc-grid{display:grid;grid-template-columns:1fr;gap:40px}
  @media (min-width:1024px){
    .doc-grid{grid-template-columns:260px minmax(0,1fr);gap:64px;align-items:start}
  }

  .toc{
    border:1px solid var(--line);border-radius:var(--radius-card);
    background:var(--card);padding:22px 20px;
  }
  @media (min-width:1024px){
    .toc{position:sticky;top:96px}
  }
  .toc h3{
    font-size:13px;font-family:var(--mono);letter-spacing:.14em;
    text-transform:uppercase;color:var(--muted);margin-bottom:14px;font-weight:700;
  }
  .toc-list{display:flex;flex-direction:column}
  .toc-link{
    position:relative;display:flex;gap:12px;align-items:baseline;
    padding:10px 0 10px 14px;font-size:14.5px;color:var(--body);
    border-left:2px solid transparent;
    transition:color .2s ease,border-color .2s ease,background-color .2s ease;
  }
  .toc-link .idx{font-family:var(--mono);font-size:12.5px;color:var(--muted);font-weight:700}
  .toc-link:hover{color:var(--ink)}
  .toc-link.active{color:var(--ink);font-weight:700;border-left-color:var(--hgreen);background:rgba(199,240,74,.14)}
  .toc-link.active .idx{color:var(--field)}

  /* ---------- steps ---------- */
  .step{padding:38px 0;border-top:1px solid var(--line);scroll-margin-top:104px}
  .step:first-child{border-top:0;padding-top:0}
  .step-head{display:flex;align-items:flex-start;gap:18px}
  .step-num{
    font-family:var(--mono);font-size:clamp(26px,3.6vw,38px);font-weight:700;
    line-height:1;color:var(--ink);letter-spacing:-.04em;flex:none;
    padding-top:2px;
  }
  .step-title{font-size:clamp(19px,2.3vw,22px);font-weight:700}
  .step-note{display:block;margin-top:6px;font-size:13px;color:var(--muted);font-family:var(--mono)}
  .step p{margin-top:14px;color:var(--body)}
  .point-list{margin-top:16px;display:grid;gap:8px}
  .point-list li{position:relative;padding-left:20px;color:var(--body);font-size:15.5px}
  .point-list li::before{
    content:"";position:absolute;left:0;top:.68em;width:8px;height:8px;
    background:var(--hgreen);border-radius:2px;
  }
  .step-divider{height:1px;background:var(--line);margin:0}

  .figure{margin:32px 0 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card)}
  .figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
  .figure figcaption{padding:12px 16px;font-size:13px;color:var(--muted);border-top:1px solid var(--line)}

  .tip-box{
    margin:36px 0 0;
    background:var(--sand2);
    border:1px solid var(--line);
    border-left:3px solid var(--field);
    border-radius:12px;
    padding:20px 22px;
  }
  .tip-box .tip-badge{
    display:inline-flex;align-items:center;
    background:var(--flame);color:#fff;font-size:12px;font-weight:700;
    padding:3px 10px;border-radius:999px;letter-spacing:.02em;
  }
  .tip-box h4{margin:12px 0 8px;font-size:17px;font-weight:700}
  .tip-box p{color:var(--body);font-size:15.5px}

  /* ---------- terminal cards ---------- */
  .term-grid{display:grid;grid-template-columns:1fr;gap:22px}
  @media (min-width:768px){.term-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}}
  .term-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    padding:26px 24px;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  }
  .term-card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
  .term-card .term-tag{
    display:inline-flex;font-family:var(--mono);font-size:12px;font-weight:700;
    background:var(--sand2);color:var(--field);
    padding:3px 10px;border-radius:999px;letter-spacing:.06em;
  }
  .term-card h3{margin:14px 0 10px;font-size:19px;font-weight:700}
  .term-card p{color:var(--body);font-size:15.5px}
  .term-card ul{margin-top:14px;display:grid;gap:6px}
  .term-card ul li{font-size:14.5px;color:var(--muted);font-family:var(--mono)}

  /* ---------- faq ---------- */
  .faq-list{max-width:820px}
  .faq-item{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    margin-bottom:12px;overflow:hidden;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item:hover{border-color:#BFC0B4}
  .faq-item.open{border-color:var(--ink);box-shadow:var(--shadow-hover)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
    transition:color .2s ease;
  }
  .faq-q:hover{color:var(--field)}
  .faq-q .chev{
    flex:none;width:22px;height:22px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);color:var(--field);
    transition:transform .24s ease,background-color .2s ease,border-color .2s ease;
  }
  .faq-item.open .chev{transform:rotate(180deg);background:var(--hgreen);border-color:var(--hgreen);color:var(--ink)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
  .faq-a-inner{padding:0 22px 20px;color:var(--body);font-size:15.5px}

  /* ---------- cta band ---------- */
  .cta-band{background:var(--field);color:var(--sand);padding:clamp(56px,8vw,88px) 0}
  .cta-grid{display:grid;grid-template-columns:1fr;gap:36px;align-items:center}
  @media (min-width:1024px){.cta-grid{grid-template-columns:1.1fr 1fr;gap:64px}}
  .cta-band h2{font-size:clamp(25px,3.4vw,34px);font-weight:700;color:var(--sand);letter-spacing:-.02em}
  .cta-band .cta-desc{margin-top:14px;color:rgba(244,241,233,.76);font-size:16px;max-width:34em}
  .cta-buttons{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  @media (max-width:520px){.cta-buttons{grid-template-columns:1fr 1fr;gap:12px}}
  .cta-foot{margin-top:20px;font-size:13.5px;color:rgba(244,241,233,.62)}
  .cta-foot a{color:var(--hgreen);border-bottom:1px solid rgba(199,240,74,.5)}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;padding:13px 24px;
    font-size:15px;font-weight:700;
    border:1px solid transparent;
    transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
  }
  .btn:active{transform:translateY(0)}
  .btn-primary{background:var(--hgreen);color:var(--ink);border-color:var(--hgreen)}
  .btn-primary:hover{background:var(--hgreen-dark);transform:translateY(-1px);box-shadow:0 10px 28px rgba(14,18,16,.16)}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
  .btn-ghost:hover{background:rgba(14,18,16,.05);transform:translateY(-1px);box-shadow:0 10px 28px rgba(14,18,16,.08)}
  .btn-outline-light{background:transparent;color:var(--sand);border-color:rgba(244,241,233,.45)}
  .btn-outline-light:hover{border-color:var(--hgreen);color:var(--hgreen);transform:translateY(-1px)}
  .btn-block{width:100%}

  /* ---------- footer ---------- */
  .site-footer{
    background:var(--ink);color:var(--sand);
    border-top:2px solid var(--hgreen);
    padding:56px 0 28px;
    font-size:14.5px;
  }
  .footer-grid{
    display:grid;grid-template-columns:1fr;gap:32px;
    padding-bottom:34px;border-bottom:1px solid rgba(244,241,233,.14);
  }
  @media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}}
  .footer-brand{
    display:inline-flex;align-items:center;gap:8px;
    font-size:18px;font-weight:800;color:var(--sand);letter-spacing:-.01em;
  }
  .footer-about{margin-top:12px;color:rgba(244,241,233,.66);max-width:22em;font-size:14px;line-height:1.8}
  .footer-col h4{
    font-size:13px;font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;
    color:var(--hgreen);margin-bottom:14px;font-weight:700;
  }
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{color:rgba(244,241,233,.8);transition:color .2s ease}
  .footer-col a:hover{color:var(--hgreen)}
  .footer-version{display:grid;gap:8px;font-family:var(--mono);font-size:13px;color:rgba(244,241,233,.68)}
  .footer-bottom{
    margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
    font-size:13px;color:rgba(244,241,233,.55);
  }
  .to-top{
    border:1px solid var(--hgreen);color:var(--hgreen);
    padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600;
    opacity:0;pointer-events:none;
    transition:opacity .24s ease,background-color .2s ease,color .2s ease,transform .2s ease;
  }
  .to-top.show{opacity:1;pointer-events:auto}
  .to-top:hover{background:var(--hgreen);color:var(--ink);transform:translateY(-1px)}

  /* ---------- motion ---------- */
  .reveal{opacity:0;transform:translateY(16px);transition:opacity .48s ease-out,transform .48s ease-out}
  .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    .reveal{opacity:1;transform:none;transition:none}
    .btn:hover,.term-card:hover,.to-top:hover{transform:none}
    .faq-a{transition:none}
  }

/* roulang page: category2 */
:root{
  --lime:#C7F04A;
  --ink:#0E1210;
  --deep:#1F3D2E;
  --sand:#F4F1E9;
  --sand-2:#EAE5D8;
  --line:#D8D3C6;
  --text:#4A524D;
  --orange:#FF5C2B;
  --white:#FFFFFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-hover:0 10px 28px rgba(14,18,16,.10);
  --shadow-soft:0 4px 14px rgba(14,18,16,.06);
  --container:1180px;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,"Courier New",monospace;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink);
  background:var(--sand);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
input{font-family:inherit;}

:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:768px){
  .container{padding:0 32px;}
}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-0.01em;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(244,241,233,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease,background .2s ease;
}
.site-header.scrolled{
  background:rgba(244,241,233,.96);
  box-shadow:0 6px 20px rgba(14,18,16,.07);
}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
  min-height:72px;
}
.nav-left,.nav-right{display:flex;align-items:center;gap:30px;}
.nav-left{justify-self:start;}
.nav-right{justify-self:end;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--ink);font-weight:700;}
.nav-link.active::after{transform:scaleX(1);}

.brand{
  justify-self:center;
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:19px;
  font-weight:800;
  letter-spacing:-0.01em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-rest{color:var(--deep);}
.brand-dot{
  width:9px;height:9px;
  border-radius:3px;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(199,240,74,.32);
  flex:0 0 auto;
}

.nav-toggle{
  display:none;
  position:absolute;
  right:20px;
  top:50%;
  transform:translateY(-50%);
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius:10px;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  background:rgba(255,255,255,.7);
}
.nav-toggle .bars{display:inline-flex;flex-direction:column;gap:3px;}
.nav-toggle .bars i{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;}

.mobile-panel{
  position:fixed;
  top:73px;
  left:0;right:0;
  z-index:65;
  max-height:80vh;
  overflow-y:auto;
  padding:0 20px 22px;
  background:var(--sand);
  border-bottom:1px solid var(--line);
  box-shadow:0 18px 32px rgba(14,18,16,.12);
  opacity:0;
  visibility:hidden;
  transform:translateY(-12px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
}
.mobile-panel.open{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-panel a.m-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 2px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.mobile-panel a.m-link span{font-size:13px;color:var(--text);}
.mobile-panel .m-cta{margin-top:18px;width:100%;}

@media (max-width:1023px){
  .header-inner{display:flex;justify-content:space-between;}
  .nav-left,.nav-right{display:none;}
  .nav-toggle{display:inline-flex;}
}
@media (min-width:1024px){
  .mobile-panel{display:none;}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--lime);color:var(--ink);}
.btn-primary:hover{background:#bce63f;transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--sand);transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-ghost:active{transform:translateY(0);box-shadow:none;}
.btn-dark{background:var(--ink);color:var(--sand);}
.btn-dark:hover{background:var(--deep);transform:translateY(-1px);box-shadow:var(--shadow-hover);}
.btn-dark:active{transform:translateY(0);box-shadow:none;}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.5;box-shadow:none;pointer-events:none;}

/* ---------- Sections ---------- */
.section{padding:76px 0;}
@media (min-width:1024px){.section{padding:104px 0;}}
.section-sand2{background:var(--sand-2);}
.section-white{background:var(--white);}
.section-dark{background:var(--ink);color:var(--sand);}

.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--deep);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--lime);display:block;}
.section-title{
  font-size:clamp(24px,3vw,33px);
  font-weight:700;
  line-height:1.35;
  letter-spacing:-0.01em;
}
.section-sub{margin-top:14px;color:var(--text);font-size:16px;max-width:640px;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:44px 0 52px;
  background-image:linear-gradient(180deg,rgba(244,241,233,.92),rgba(244,241,233,.97)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb .sep{color:var(--line);}
.breadcrumb .current{color:var(--ink);font-weight:600;}

.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
  align-items:center;
}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:7fr 5fr;gap:56px;}
}
.hero-title{
  font-size:clamp(30px,5vw,52px);
  font-weight:800;
  letter-spacing:-0.02em;
  line-height:1.22;
  margin:14px 0 18px;
}
.hero-title .hl{position:relative;white-space:nowrap;}
.hero-title .hl::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:6px;
  height:10px;
  background:var(--lime);
  opacity:.55;
  z-index:-1;
  border-radius:3px;
}
.hero-lead{
  font-size:16.5px;
  color:var(--text);
  max-width:620px;
  line-height:1.85;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin:24px 0 26px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--deep);
  font-weight:600;
}
.hero-meta .divider{color:var(--line);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}

.hero-visual{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--white);
  padding:14px;
  box-shadow:var(--shadow-soft);
}
.hero-visual img{
  border-radius:var(--radius-img);
  aspect-ratio:4/3;
  object-fit:cover;
  width:100%;
}
.hero-visual .caption{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:14px 4px 2px;
  font-size:13.5px;
  color:var(--text);
}
.hero-visual .caption .version{font-family:var(--font-mono);color:var(--ink);font-weight:700;}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:999px;
  background:var(--sand-2);
  color:var(--ink);
  font-size:12.5px;
  font-weight:600;
  line-height:1.6;
  white-space:nowrap;
}
.badge-lime{background:var(--lime);}
.badge-outline{background:transparent;border:1px solid var(--line);color:var(--text);}
.badge-orange{background:#FFEDE6;color:var(--orange);}
.badge-dark{background:var(--deep);color:var(--sand);}

/* ---------- Terminal tabs ---------- */
.term-tabs{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding-bottom:6px;
  margin-bottom:32px;
  scrollbar-width:thin;
}
.term-tab{
  flex:0 0 auto;
  padding:11px 22px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--white);
  font-size:14.5px;
  font-weight:600;
  color:var(--text);
  transition:all .2s ease;
}
.term-tab:hover{border-color:var(--ink);color:var(--ink);}
.term-tab[aria-selected="true"]{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink);
  box-shadow:0 6px 16px rgba(199,240,74,.36);
}
.term-panel{display:none;}
.term-panel.active{display:block;animation:fadeUp .48s ease-out both;}

@keyframes fadeUp{
  from{opacity:0;transform:translateY(16px);}
  to{opacity:1;transform:translateY(0);}
}

/* ---------- Device item ---------- */
.device-item{
  display:grid;
  grid-template-columns:1fr;
  gap:26px;
  padding:26px;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.device-item + .device-item{margin-top:24px;}
.device-item:hover{
  border-color:var(--ink);
  box-shadow:var(--shadow-hover);
  transform:translateY(-1px);
}
@media (min-width:900px){
  .device-item{grid-template-columns:360px 1fr;gap:32px;padding:30px;align-items:start;}
}
.device-figure{
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow:hidden;
  position:relative;
  background:var(--sand-2);
}
.device-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform .3s ease;
}
.device-item:hover .device-figure img{transform:scale(1.03);}

.device-head{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin-bottom:12px;
}
.device-title{
  font-size:21px;
  font-weight:700;
  letter-spacing:-0.01em;
  margin-bottom:10px;
}
.device-desc{color:var(--text);font-size:15.5px;margin-bottom:18px;}

.spec-list{border-top:1px solid var(--line);margin-bottom:20px;}
.spec-row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  padding:10px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
}
.spec-row .k{color:var(--text);}
.spec-row .v{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  color:var(--ink);
  text-align:right;
}
.device-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.device-actions .note{font-size:13px;color:var(--text);}

/* ---------- Numbered list ---------- */
.num-block{
  display:grid;
  grid-template-columns:1fr;
  border-top:1px solid var(--line);
}
.num-item{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:20px;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  align-items:start;
}
.num-index{
  font-family:var(--font-mono);
  font-size:34px;
  font-weight:700;
  line-height:1;
  color:var(--ink);
  opacity:.22;
  padding-top:4px;
  min-width:56px;
}
.num-item h3{font-size:20px;font-weight:600;margin-bottom:8px;}
.num-item p{color:var(--text);font-size:15.5px;max-width:760px;}

/* ---------- Steps ---------- */
.step-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:640px){.step-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.step-grid{grid-template-columns:repeat(4,1fr);gap:24px;}}
.step-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.step-card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);transform:translateY(-1px);}
.step-card .step-no{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  color:var(--deep);
  letter-spacing:.08em;
  display:inline-block;
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:2px solid var(--lime);
}
.step-card h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step-card p{font-size:14.5px;color:var(--text);}

/* ---------- Update cards ---------- */
.update-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
}
@media (min-width:768px){.update-grid{grid-template-columns:repeat(3,1fr);}}
.update-card{
  background:var(--sand);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 24px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.update-card:hover{border-color:var(--ink);box-shadow:var(--shadow-hover);}
.update-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.update-card p{font-size:14.5px;color:var(--text);}
.update-card .meta{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--deep);
}

/* ---------- Notice ---------- */
.notice{
  display:flex;
  gap:16px;
  padding:20px 22px;
  background:var(--sand-2);
  border-left:4px solid var(--deep);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  margin:26px 0;
}
.notice p{font-size:14.5px;color:var(--text);}
.notice strong{color:var(--ink);}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;}
.faq-item{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:var(--ink);}
.faq-item.open{border-color:var(--ink);box-shadow:var(--shadow-soft);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 24px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--deep);}
.faq-arrow{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
  transition:transform .24s ease;
}
.faq-arrow::before,
.faq-arrow::after{
  content:"";
  position:absolute;
  background:var(--ink);
  border-radius:2px;
}
.faq-arrow::before{left:4px;right:4px;top:10px;height:2px;}
.faq-arrow::after{top:4px;bottom:4px;left:10px;width:2px;transition:opacity .2s ease;}
.faq-item.open .faq-arrow{transform:rotate(180deg);}
.faq-item.open .faq-arrow::after{opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 24px 22px;
  font-size:15px;
  color:var(--text);
  border-top:1px solid var(--line);
  padding-top:16px;
  margin:0 24px 0;
  padding-left:0;
  padding-right:0;
}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(circle at 82% 20%,rgba(199,240,74,.18),transparent 55%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:center;
}
@media (min-width:1024px){
  .cta-inner{grid-template-columns:1.15fr .85fr;gap:56px;}
}
.cta-title{
  font-size:clamp(26px,3.4vw,38px);
  font-weight:800;
  letter-spacing:-0.02em;
  line-height:1.3;
  color:var(--sand);
}
.cta-title .accent{color:var(--lime);}
.cta-text{margin-top:16px;color:rgba(244,241,233,.78);font-size:16px;max-width:560px;}
.cta-actions{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
}
@media (min-width:520px){.cta-actions{grid-template-columns:repeat(2,1fr);}}
.cta-actions .btn{width:100%;}
.cta-band .btn-ghost{color:var(--sand);border-color:rgba(244,241,233,.5);}
.cta-band .btn-ghost:hover{background:var(--sand);color:var(--ink);border-color:var(--sand);}
.cta-footnote{
  margin-top:18px;
  font-size:13.5px;
  color:rgba(244,241,233,.62);
  font-family:var(--font-mono);
}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--ink);
  color:var(--sand);
  border-top:2px solid var(--lime);
  padding:64px 0 28px;
  font-size:14.5px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(216,211,198,.18);
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;}
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:17px;
  font-weight:800;
  color:var(--sand);
  margin-bottom:14px;
}
.footer-about{
  color:rgba(244,241,233,.62);
  font-size:13.5px;
  line-height:1.8;
  max-width:280px;
}
.footer-col h4{
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:rgba(244,241,233,.55);
  text-transform:uppercase;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul li a{
  color:rgba(244,241,233,.82);
  font-size:14px;
  transition:color .2s ease;
}
.footer-col ul li a:hover{color:var(--lime);}
.footer-version{
  display:flex;
  flex-direction:column;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:rgba(244,241,233,.62);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:24px;
  font-size:12.5px;
  color:rgba(244,241,233,.5);
}
.footer-bottom p{margin:0;}
.to-top{
  padding:8px 16px;
  border:1px solid rgba(199,240,74,.6);
  border-radius:999px;
  color:var(--lime);
  font-size:12.5px;
  font-weight:600;
  transition:all .2s ease;
}
.to-top:hover{background:var(--lime);color:var(--ink);border-color:var(--lime);}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

@media (max-width:520px){
  body{font-size:16px;}
  .hero-actions .btn,.device-actions .btn{width:100%;}
  .cta-actions{grid-template-columns:1fr;}
  .num-index{font-size:26px;min-width:44px;}
  .device-item{padding:20px;}
}