/* roulang page: index */
:root{
  --c-ink:#1B1626;
  --c-primary:#4A2E63;
  --c-primary-strong:#33204A;
  --c-accent:#E8734A;
  --c-accent-soft:#FBE7DE;
  --c-bg:#F7F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4DED5;
  --c-text:#241E2E;
  --c-muted:#6E6579;
  --c-ok:#3F8F6E;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 2px 10px rgba(35,25,50,.06);
  --shadow-2:0 10px 28px rgba(35,25,50,.10);
  --container:1180px;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent)}
p{margin:0 0 1em}
h1,h2,h3,h4{color:var(--c-text);font-weight:700;letter-spacing:.005em;margin:0}
h1{font-size:clamp(28px,3.6vw,38px);line-height:1.3}
h2{font-size:clamp(22px,2.4vw,28px);line-height:1.35}
h3{font-size:clamp(17px,1.6vw,20px);line-height:1.45}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:78px 0;position:relative}
.section-alt{background:var(--c-surface)}
.section-dark{background:var(--c-ink);color:#EFEAF3}
.section-dark h2,.section-dark h3{color:#FFFFFF}
.section-dark p{color:rgba(239,234,243,.78)}
.sec-head{max-width:720px;margin-bottom:34px}
.sec-head p{color:var(--c-muted);margin:10px 0 0;font-size:15px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--c-primary);
  background:rgba(74,46,99,.08);border:1px solid rgba(74,46,99,.16);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;font-weight:600;
}
.section-dark .eyebrow{color:#F3C4AE;background:rgba(232,115,74,.14);border-color:rgba(232,115,74,.32)}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;transition:all .22s ease;cursor:pointer;border:1px solid transparent}
.btn-main{background:var(--c-accent);color:#fff;border-radius:999px;padding:12px 26px;box-shadow:0 6px 18px rgba(232,115,74,.28)}
.btn-main:hover{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px rgba(74,46,99,.3);transform:translateY(-1px)}
.btn-main:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(74,46,99,.24)}
.btn-ghost{background:transparent;border-color:rgba(74,46,99,.42);color:var(--c-primary);border-radius:999px;padding:12px 24px}
.btn-ghost:hover{background:rgba(74,46,99,.08);border-color:var(--c-primary);color:var(--c-primary-strong)}
.btn-text{background:none;color:var(--c-primary);padding:0;border:0}
.btn-text .ico{transition:transform .22s ease}
.btn-text:hover .ico{transform:translateX(4px)}
.section-dark .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.section-dark .btn-ghost:hover{background:rgba(255,255,255,.1)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(247,244,239,.94);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease,background .25s ease,backdrop-filter .25s ease;
}
.site-header.is-stuck{box-shadow:0 8px 22px rgba(35,25,50,.08);background:rgba(247,244,239,.86);backdrop-filter:blur(8px)}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(150deg,var(--c-primary),var(--c-primary-strong));
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:700;
  box-shadow:0 6px 14px rgba(74,46,99,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--c-muted);white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;font-size:14.5px;color:#3B3348;padding:8px 11px;border-radius:10px;
  font-weight:500;white-space:nowrap;transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--c-primary);background:rgba(74,46,99,.07)}
.nav-link.is-active{color:var(--c-primary);font-weight:700}
.nav-link.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent);
}
.nav-side{display:flex;align-items:center;gap:12px;margin-left:auto}
.stage-chips{display:flex;align-items:center;gap:6px}
.chip{
  display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;
  border-radius:999px;padding:4px 11px;line-height:1.6;transition:transform .2s ease,box-shadow .2s ease;
  border:1px solid transparent;white-space:nowrap;cursor:default;
}
.chip:hover{transform:translateY(-2px)}
.chip-warm{color:#6E5C86;border-color:#CFC4DC;background:transparent}
.chip-live{color:#fff;background:var(--c-accent);box-shadow:0 4px 12px rgba(232,115,74,.3)}
.chip-live i{width:6px;height:6px;border-radius:50%;background:#fff;display:inline-block;animation:pulse 1.8s infinite}
.chip-back{color:var(--c-primary);background:rgba(74,46,99,.09);border-color:rgba(74,46,99,.14)}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-primary);font-size:20px;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(74,46,99,.07)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#F6F1FA;
  background:
    linear-gradient(115deg,rgba(27,22,38,.94) 0%,rgba(51,32,74,.9) 48%,rgba(74,46,99,.78) 100%),
    url('/assets/images/67893e93376f3d44.webp') center/cover no-repeat;
}
.hero .wrap{position:relative;z-index:2;padding-top:70px;padding-bottom:70px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start}
.hero h1{color:#fff;margin-bottom:18px}
.hero h1 span{color:#F5B79C}
.hero-lead{font-size:16px;line-height:1.9;color:rgba(246,241,250,.82);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 20px}
.hero-actions .btn-ghost{border-color:rgba(255,255,255,.45);color:#fff}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.12)}
.age-bar{
  display:flex;gap:10px;align-items:flex-start;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-s);padding:12px 14px;font-size:13px;line-height:1.7;color:rgba(246,241,250,.8);max-width:600px;
}
.age-bar b{color:#F5B79C;font-weight:700}
.age-badge{
  flex:0 0 auto;background:var(--c-accent);color:#fff;font-size:11px;font-weight:700;
  border-radius:6px;padding:2px 7px;letter-spacing:.04em;margin-top:2px;
}
.hero-panel{
  background:rgba(255,255,255,.96);border-radius:var(--radius-l);padding:20px;
  box-shadow:0 20px 46px rgba(12,8,20,.34);color:var(--c-text);
}
.panel-head{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--c-primary);padding-bottom:12px;border-bottom:1px dashed var(--c-line)}
.panel-head .dot{width:8px;height:8px;border-radius:50%;background:var(--c-ok);box-shadow:0 0 0 3px rgba(63,143,110,.16)}
.panel-time{margin-left:auto;font-size:11.5px;color:var(--c-muted);font-weight:500}
.panel-list li{display:flex;gap:10px;align-items:flex-start;padding:13px 0;border-bottom:1px solid var(--c-line)}
.panel-list li:last-child{border-bottom:0}
.panel-list .tag{
  flex:0 0 auto;font-size:11px;font-weight:700;color:#8A4A2A;background:var(--c-accent-soft);
  border-radius:6px;padding:2px 8px;margin-top:3px;
}
.panel-list strong{display:block;font-size:14.5px;font-weight:600;color:var(--c-text)}
.panel-list p{font-size:12.5px;color:var(--c-muted);margin:2px 0 0;line-height:1.6}
.panel-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;margin-top:16px;
  background:var(--c-primary);color:#fff;border-radius:999px;padding:11px;font-size:14px;font-weight:600;
}
.panel-cta:hover{background:var(--c-accent);color:#fff}
.hero-strip{
  position:relative;z-index:2;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:26px;padding:16px 0 22px;font-size:13px;color:rgba(246,241,250,.7);
}
.hero-strip span{display:inline-flex;align-items:center;gap:7px}
.hero-strip i{color:#F5B79C}

/* ---------- metrics ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.metric-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:18px 16px;box-shadow:var(--shadow-1);transition:all .24s ease;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(74,46,99,.22)}
.metric-num{font-family:var(--font-num);font-size:29px;font-weight:700;color:var(--c-primary);line-height:1.2}
.metric-num small{font-size:13px;font-weight:600;color:var(--c-muted);margin-left:3px}
.metric-label{font-size:13px;color:var(--c-muted);margin-top:2px}
.metric-flag{
  display:inline-block;margin-top:9px;font-size:11.5px;font-weight:700;
  color:var(--c-ok);background:rgba(63,143,110,.1);border-radius:999px;padding:2px 9px;
}
.metric-flag.warn{color:#B4542A;background:rgba(232,115,74,.12)}

/* ---------- matrix ---------- */
.matrix{display:grid;grid-template-columns:1.1fr 1fr;gap:16px}
.matrix-big{
  background:linear-gradient(160deg,var(--c-primary),var(--c-primary-strong));
  color:#fff;border-radius:var(--radius-l);padding:30px;display:flex;flex-direction:column;
  box-shadow:var(--shadow-2);transition:transform .25s ease;
}
.matrix-big:hover{transform:translateY(-3px)}
.matrix-big h3{color:#fff;font-size:22px;margin-bottom:10px}
.matrix-big p{color:rgba(255,255,255,.8);font-size:14.5px}
.matrix-big .matrix-ico{
  width:46px;height:46px;border-radius:14px;background:rgba(255,255,255,.14);
  display:grid;place-items:center;font-size:22px;margin-bottom:16px;
}
.matrix-big .matrix-foot{margin-top:auto;font-size:13px;color:rgba(255,255,255,.7);display:flex;gap:14px;flex-wrap:wrap}
.matrix-sm{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mini-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:20px;box-shadow:var(--shadow-1);transition:all .24s ease;
}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(74,46,99,.2)}
.mini-card .ico{font-size:20px;color:var(--c-accent);display:block;margin-bottom:10px}
.mini-card h3{font-size:16px;margin-bottom:6px}
.mini-card p{font-size:13.5px;color:var(--c-muted);margin:0;line-height:1.75}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.cmp-card{border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--c-line);background:var(--c-surface);box-shadow:var(--shadow-1)}
.cmp-head{padding:15px 22px;font-weight:700;font-size:15.5px;display:flex;align-items:center;gap:9px}
.cmp-bad .cmp-head{background:#F1ECF5;color:#5C4A72}
.cmp-good .cmp-head{background:var(--c-primary);color:#fff}
.cmp-card ul{padding:8px 22px 18px}
.cmp-card li{display:flex;gap:10px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--c-line);font-size:14.5px;line-height:1.7}
.cmp-card li:last-child{border-bottom:0}
.cmp-card li i{flex:0 0 auto;margin-top:4px;font-size:15px}
.cmp-bad li{color:#6E6579}
.cmp-bad li i{color:#B9AEC8}
.cmp-good li i{color:var(--c-ok)}

/* ---------- milestone ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding-top:14px}
.timeline::before{
  content:"";position:absolute;left:0;right:0;top:22px;height:2px;background:var(--c-line);z-index:0;
}
.tl-item{position:relative;z-index:1}
.tl-dot{
  width:14px;height:14px;border-radius:50%;background:#fff;border:2px solid var(--c-primary);
  margin-bottom:16px;position:relative;
}
.tl-item.done .tl-dot{background:var(--c-primary);box-shadow:0 0 0 5px rgba(74,46,99,.1)}
.tl-year{font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--c-accent);letter-spacing:.04em}
.tl-item h3{font-size:16px;margin:4px 0 8px}
.tl-item p{font-size:13.5px;color:var(--c-muted);margin:0;line-height:1.75}

/* ---------- topics ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic-card{
  display:flex;flex-direction:column;gap:8px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius-m);padding:22px;box-shadow:var(--shadow-1);transition:all .24s ease;color:var(--c-text);
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(232,115,74,.4);color:var(--c-text)}
.topic-card .num{font-family:var(--font-num);font-size:12.5px;font-weight:700;color:#B9899F;letter-spacing:.1em}
.topic-card h3{font-size:16.5px}
.topic-card p{font-size:13.5px;color:var(--c-muted);margin:0;line-height:1.75}
.topic-card .go{margin-top:4px;font-size:13px;color:var(--c-accent);font-weight:600;display:inline-flex;align-items:center;gap:6px}

/* ---------- scenes ---------- */
.scene-row{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;margin-bottom:44px}
.scene-row:last-child{margin-bottom:0}
.scene-row.rev .scene-media{order:2}
.scene-media{border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-2);background:var(--c-line);aspect-ratio:16/10}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.scene-media:hover img{transform:scale(1.03)}
.scene-body h3{font-size:21px;margin-bottom:10px}
.scene-body p{color:var(--c-muted);font-size:15px}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag-pill{font-size:12.5px;color:var(--c-primary);background:rgba(74,46,99,.08);border-radius:999px;padding:4px 12px;font-weight:600}

/* ---------- news / cms ---------- */
.news-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:26px;align-items:start}
.lead-post{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);
  overflow:hidden;box-shadow:var(--shadow-1);transition:all .25s ease;color:var(--c-text);height:100%;
}
.lead-post:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(74,46,99,.2);color:var(--c-text)}
.lead-post .thumb{aspect-ratio:16/8;background:var(--c-line);overflow:hidden}
.lead-post .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.lead-post:hover .thumb img{transform:scale(1.04)}
.lead-body{padding:22px 24px 24px}
.lead-body h3{font-size:20px;margin:10px 0 10px;line-height:1.5}
.lead-body p{font-size:14.5px;color:var(--c-muted);margin:0 0 14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--c-muted);flex-wrap:wrap}
.badge-cat{
  display:inline-block;font-size:12px;font-weight:700;color:#8A4A2A;background:var(--c-accent-soft);
  border-radius:6px;padding:2px 9px;
}
.post-list{display:flex;flex-direction:column;gap:12px}
.post-row{
  display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:16px 18px;box-shadow:var(--shadow-1);transition:all .22s ease;color:var(--c-text);
}
.post-row:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(232,115,74,.35);color:var(--c-text)}
.post-row h4{font-size:15px;margin:0 0 6px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-row .post-meta{font-size:12px}
.empty-state{
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--radius-l);
  padding:52px 24px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-state i{font-size:30px;color:#C7BBD6;display:block;margin-bottom:12px}
.empty-state p{color:var(--c-muted);margin-bottom:18px}

/* ---------- safety (dark) ---------- */
.safety-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.safety-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-m);
  padding:22px;transition:all .24s ease;
}
.safety-card:hover{background:rgba(255,255,255,.1);transform:translateY(-3px);border-color:rgba(232,115,74,.5)}
.safety-card i{font-size:22px;color:#F5B79C;display:block;margin-bottom:12px}
.safety-card h3{font-size:16px;margin-bottom:8px}
.safety-card p{font-size:13.5px;margin:0;line-height:1.75}

/* ---------- quick answers ---------- */
.qa-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.qa-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-left:4px solid var(--c-primary);
  border-radius:var(--radius-s);padding:18px 18px 18px 16px;box-shadow:var(--shadow-1);transition:all .22s ease;
}
.qa-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.qa-card strong{display:block;font-size:14.5px;color:var(--c-primary);margin-bottom:6px}
.qa-card p{font-size:13.5px;color:var(--c-muted);margin:0;line-height:1.75}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px}
.acc-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-1)}
.acc-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;padding:17px 22px;font-size:15.5px;font-weight:600;
  color:var(--c-text);transition:color .2s ease,background .2s ease;
}
.acc-btn:hover{background:rgba(74,46,99,.04);color:var(--c-primary)}
.acc-btn:not(.collapsed){color:var(--c-primary);background:rgba(74,46,99,.05)}
.acc-btn::after{
  content:"\F282";font-family:"bootstrap-icons"!important;background-image:none!important;
  font-size:14px;color:var(--c-accent);transition:transform .28s ease;width:auto;height:auto;flex:0 0 auto;
}
.acc-btn:not(.collapsed)::after{transform:rotate(180deg)}
.acc-body{padding:0 22px 18px;font-size:14.5px;color:var(--c-muted);line-height:1.85}

/* ---------- download ---------- */
.dl-panel{
  background:linear-gradient(140deg,var(--c-primary) 0%,var(--c-primary-strong) 62%,#241531 100%);
  border-radius:24px;padding:44px;color:#fff;display:grid;grid-template-columns:1.35fr .65fr;gap:38px;
  box-shadow:0 24px 50px rgba(35,25,50,.26);position:relative;overflow:hidden;
}
.dl-panel::before{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,115,74,.34),transparent 70%);
}
.dl-panel h2{color:#fff;position:relative}
.dl-panel p{color:rgba(255,255,255,.78);font-size:14.5px;position:relative}
.dl-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;position:relative}
.dl-btn{
  display:inline-flex;align-items:center;gap:9px;background:#fff;color:var(--c-primary-strong);
  border-radius:999px;padding:12px 22px;font-size:14.5px;font-weight:700;transition:all .22s ease;
  border:1px solid rgba(255,255,255,.5);
}
.dl-btn:hover{background:var(--c-accent);color:#fff;border-color:var(--c-accent);transform:translateY(-2px);box-shadow:0 10px 22px rgba(232,115,74,.34)}
.dl-btn:active{transform:translateY(0)}
.dl-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:24px;font-size:13px;color:rgba(255,255,255,.7);position:relative}
.dl-meta span{display:inline-flex;align-items:center;gap:6px}
.dl-side{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;position:relative}
.qr-box{
  width:148px;height:148px;border-radius:16px;background:rgba(255,255,255,.94);
  display:grid;place-items:center;text-align:center;color:var(--c-primary-strong);
  font-size:12.5px;font-weight:700;line-height:1.6;padding:12px;
  box-shadow:inset 0 0 0 1px rgba(74,46,99,.14);
}
.qr-box i{font-size:26px;display:block;margin-bottom:6px;color:var(--c-accent)}
.dl-side small{font-size:12px;color:rgba(255,255,255,.66);text-align:center}
.dl-note{
  margin-top:14px;font-size:12.5px;color:rgba(255,255,255,.6);position:relative;
}

/* ---------- subscribe ---------- */
.sub-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:38px;align-items:start}
.sub-form{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);padding:28px;box-shadow:var(--shadow-1)}
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;color:var(--c-muted);margin-bottom:6px;font-weight:600}
.field input[type=text],.field input[type=email],.field select{
  width:100%;height:46px;border-radius:var(--radius-s);border:1px solid var(--c-line);
  background:#FDFBF8;padding:0 14px;color:var(--c-text);transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(232,115,74,.16);background:#fff;
}
.field input.err{border-color:#C0453B;box-shadow:0 0 0 3px rgba(192,69,59,.12)}
.field .err-msg{display:none;font-size:12px;color:#C0453B;margin-top:5px}
.field .err-msg.show{display:block}
.check-row{display:flex;gap:9px;align-items:flex-start;font-size:13px;color:var(--c-muted);margin:14px 0 18px}
.check-row input{margin-top:4px;accent-color:var(--c-primary);width:16px;height:16px}
.sub-hint{font-size:13px;margin-top:12px;color:var(--c-ok);min-height:20px}
.sub-hint.bad{color:#C0453B}
.sub-side ul li{display:flex;gap:10px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--c-line);font-size:14px;color:var(--c-muted)}
.sub-side ul li:last-child{border-bottom:0}
.sub-side ul li i{color:var(--c-accent);margin-top:4px}

/* ---------- journey ---------- */
.journey{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.j-step{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:20px;box-shadow:var(--shadow-1);position:relative;transition:all .24s ease;
}
.j-step:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(232,115,74,.4)}
.j-step .j-num{
  font-family:var(--font-num);font-size:12px;font-weight:700;color:#fff;background:var(--c-primary);
  width:26px;height:26px;border-radius:8px;display:grid;place-items:center;margin-bottom:12px;
}
.j-step h3{font-size:15.5px;margin-bottom:6px}
.j-step p{font-size:13.5px;color:var(--c-muted);margin:0;line-height:1.75}

/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);color:rgba(239,234,243,.72);padding:60px 0 26px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand .brand-text strong{color:#fff}
.foot-brand .brand-text em{color:rgba(239,234,243,.55)}
.foot-brand p{margin-top:16px;font-size:13.5px;line-height:1.8;color:rgba(239,234,243,.62);max-width:320px}
.site-footer h4{font-size:13px;letter-spacing:.08em;color:#fff;margin-bottom:14px;font-weight:700}
.foot-links li{margin-bottom:9px}
.foot-links a{color:rgba(239,234,243,.66);font-size:13.5px;transition:all .2s ease;display:inline-block}
.foot-links a:hover{color:var(--c-accent);transform:translateX(3px);text-decoration:underline;text-underline-offset:3px}
.foot-dl a{
  display:flex;align-items:center;gap:8px;color:rgba(239,234,243,.72);font-size:13.5px;margin-bottom:9px;
  transition:color .2s ease;
}
.foot-dl a:hover{color:var(--c-accent)}
.foot-bottom{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;padding-top:20px;font-size:12.5px;color:rgba(239,234,243,.5)}
.foot-bottom .legal{display:flex;gap:16px;flex-wrap:wrap}
.foot-bottom .legal a{color:rgba(239,234,243,.5)}
.foot-bottom .legal a:hover{color:var(--c-accent)}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:14px;border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-primary);display:grid;place-items:center;font-size:18px;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .25s ease;z-index:1100;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .metric-grid{grid-template-columns:repeat(3,1fr)}
  .nav-main{gap:0}
  .nav-link{font-size:13.5px;padding:8px 8px}
  .stage-chips .chip-back{display:none}
}
@media (max-width:991px){
  .section{padding:56px 0}
  .hero .wrap{padding-top:48px;padding-bottom:48px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .nav-main{
    position:absolute;left:0;right:0;top:100%;background:var(--c-surface);
    border-bottom:1px solid var(--c-line);box-shadow:var(--shadow-2);
    flex-direction:column;align-items:stretch;gap:2px;padding:12px 18px 18px;
    display:none;
  }
  .nav-main.is-open{display:flex}
  .nav-link{padding:11px 10px;font-size:15px}
  .nav-link.is-active::after{left:10px;right:auto;width:22px}
  .nav-toggle{display:inline-flex}
  .stage-chips{display:none}
  .nav-main.is-open .mobile-chips{display:flex;gap:8px;overflow-x:auto;padding:6px 0 10px}
  .matrix{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr 1fr;gap:26px}
  .timeline::before{display:none}
  .topic-grid{grid-template-columns:1fr 1fr}
  .scene-row{grid-template-columns:1fr;gap:20px}
  .scene-row.rev .scene-media{order:0}
  .news-layout{grid-template-columns:1fr}
  .safety-grid{grid-template-columns:1fr 1fr}
  .qa-grid{grid-template-columns:1fr 1fr}
  .dl-panel{grid-template-columns:1fr;padding:32px}
  .sub-grid{grid-template-columns:1fr}
  .journey{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .brand-text em{display:none}
}
@media (max-width:767px){
  .section{padding:40px 0}
  body{font-size:15.5px}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%}
  .metric-grid{grid-template-columns:1fr 1fr}
  .matrix-sm{grid-template-columns:1fr}
  .topic-grid{grid-template-columns:1fr}
  .qa-grid{grid-template-columns:1fr}
  .safety-grid{grid-template-columns:1fr}
  .journey{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .dl-btns .dl-btn{width:100%;justify-content:center}
  .dl-panel{padding:26px 20px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  h1{font-size:26px}
  .metric-num{font-size:24px}
  .brand-text strong{font-size:14.5px}
  .hero-strip{gap:14px;font-size:12px}
  .sub-form{padding:20px}
}

/* roulang page: article */
:root{
  --c-ink:#1B1626;
  --c-primary:#4A2E63;
  --c-primary-strong:#33204A;
  --c-accent:#E8734A;
  --c-accent-soft:#FBE7DE;
  --c-bg:#F7F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4DED5;
  --c-text:#241E2E;
  --c-muted:#6E6579;
  --c-ok:#3F8F6E;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 2px 10px rgba(35,25,50,.06);
  --shadow-2:0 10px 28px rgba(35,25,50,.10);
  --container:1180px;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent)}
a:focus-visible,button:focus-visible,.chip:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}
button,input,select,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{font-weight:700;line-height:1.32;color:var(--c-text);margin:0 0 .6em}
h1{font-size:clamp(26px,3.2vw,38px)}
h2{font-size:clamp(22px,2.4vw,28px)}
h3{font-size:clamp(17px,1.6vw,20px)}
p{margin:0 0 1em}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;transition:all .22s ease;cursor:pointer;border:1px solid transparent;text-align:center}
.btn-main{background:var(--c-accent);color:#fff;border-radius:999px;padding:12px 26px;box-shadow:0 6px 18px rgba(232,115,74,.28)}
.btn-main:hover{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px rgba(74,46,99,.3);transform:translateY(-1px)}
.btn-main:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(74,46,99,.24)}
.btn-ghost{background:transparent;border-color:rgba(74,46,99,.42);color:var(--c-primary);border-radius:999px;padding:12px 24px}
.btn-ghost:hover{background:rgba(74,46,99,.08);border-color:var(--c-primary);color:var(--c-primary-strong)}
.btn-text{background:none;color:var(--c-primary);padding:0;border:0}
.btn-text .ico{transition:transform .22s ease}
.btn-text:hover .ico{transform:translateX(4px)}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(247,244,239,.94);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease,background .25s ease,backdrop-filter .25s ease;
}
.site-header.is-stuck{box-shadow:0 8px 22px rgba(35,25,50,.08);background:rgba(247,244,239,.9);backdrop-filter:blur(8px)}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:74px;position:relative}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(150deg,var(--c-primary),var(--c-primary-strong));
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:700;
  box-shadow:0 6px 14px rgba(74,46,99,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--c-muted);white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;font-size:14.5px;color:#3B3348;padding:8px 11px;border-radius:10px;
  font-weight:500;white-space:nowrap;transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--c-primary);background:rgba(74,46,99,.07)}
.nav-link.is-active{color:var(--c-primary);font-weight:700}
.nav-link.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent);
}
.nav-side{display:flex;align-items:center;gap:12px;margin-left:auto}
.stage-chips{display:flex;align-items:center;gap:6px}
.chip{
  display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;
  border-radius:999px;padding:4px 11px;line-height:1.6;transition:transform .2s ease,box-shadow .2s ease;
  border:1px solid transparent;white-space:nowrap;
}
.chip:hover{transform:translateY(-2px)}
.chip-warm{color:#6E5C86;border-color:#CFC4DC;background:transparent}
.chip-live{color:#fff;background:var(--c-accent);box-shadow:0 4px 12px rgba(232,115,74,.3)}
.chip-live i{width:6px;height:6px;border-radius:50%;background:#fff;display:inline-block;animation:pulse 1.8s infinite}
.chip-back{color:var(--c-primary);background:rgba(74,46,99,.09);border-color:rgba(74,46,99,.14)}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.72)}}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-primary);font-size:20px;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(74,46,99,.07)}
.mobile-chips{display:none}
/* ---------- article head ---------- */
.crumb-bar{background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--c-muted);padding:14px 0}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-accent)}
.crumb .sep{color:#C9C1B6}
.crumb .now{color:var(--c-primary);font-weight:600}
.art-head{padding:44px 0 40px;background:
  radial-gradient(760px 300px at 82% -30%,rgba(232,115,74,.10),transparent 62%),
  var(--c-bg);}
.art-cat{
  display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;
  background:var(--c-accent-soft);color:#B4512C;border-radius:999px;padding:4px 13px;margin-bottom:16px;
}
.art-head h1{max-width:900px;margin-bottom:14px;letter-spacing:.005em}
.art-lead{max-width:760px;color:var(--c-muted);font-size:15.5px;line-height:1.9;margin-bottom:20px}
.art-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--c-muted)}
.art-meta span{display:inline-flex;align-items:center;gap:6px}
.art-meta i{color:var(--c-primary);font-size:14px}
.meta-tag{background:rgba(74,46,99,.08);border:1px solid rgba(74,46,99,.14);color:var(--c-primary);border-radius:999px;padding:2px 11px;font-weight:600}
/* ---------- article body ---------- */
.art-shell{padding:0 0 76px}
.art-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-l);
  box-shadow:var(--shadow-1);padding:38px 42px;
}
.prose{font-size:16px;line-height:1.9;letter-spacing:.01em;color:var(--c-text)}
.prose > *:first-child{margin-top:0}
.prose h2{font-size:clamp(21px,2.2vw,26px);margin:1.7em 0 .7em;padding-left:14px;border-left:4px solid var(--c-accent);line-height:1.45}
.prose h3{font-size:19px;margin:1.5em 0 .6em;color:var(--c-primary-strong)}
.prose h4{font-size:16.5px;margin:1.3em 0 .5em;color:var(--c-primary)}
.prose p{margin:0 0 1.15em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.35em}
.prose li{margin-bottom:.5em}
.prose ul li::marker{color:var(--c-accent)}
.prose ol li::marker{color:var(--c-primary);font-weight:700}
.prose a{color:var(--c-primary);border-bottom:1px solid rgba(74,46,99,.32);transition:color .2s,border-color .2s}
.prose a:hover{color:var(--c-accent);border-bottom-color:var(--c-accent)}
.prose blockquote{
  margin:1.5em 0;padding:16px 22px;background:#FAF6F1;border-left:4px solid var(--c-primary);
  border-radius:0 var(--radius-s) var(--radius-s) 0;color:#40364F;font-size:15.5px;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--radius-s);margin:1.4em 0;border:1px solid var(--c-line)}
.prose figure{margin:1.6em 0}
.prose figcaption{font-size:13px;color:var(--c-muted);text-align:center;margin-top:8px}
.prose table{width:100%;border-collapse:separate;border-spacing:0;margin:1.5em 0;font-size:14.5px;border:1px solid var(--c-line);border-radius:var(--radius-s);overflow:hidden}
.prose th{background:#F3EEF7;color:var(--c-primary-strong);font-weight:700;text-align:left;padding:11px 14px}
.prose td{padding:11px 14px;border-top:1px solid var(--c-line);background:#fff}
.prose tr:hover td{background:#FCFAF7}
.prose code{background:#F3EEF7;color:var(--c-primary-strong);padding:2px 6px;border-radius:6px;font-size:.92em}
.prose hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}
/* ---------- notice ---------- */
.notice{
  display:flex;gap:16px;align-items:flex-start;margin-top:26px;
  background:#FAF6F1;border:1px solid var(--c-line);border-left:4px solid var(--c-accent);
  border-radius:var(--radius-m);padding:20px 24px;
}
.notice i{font-size:22px;color:var(--c-accent);line-height:1.4}
.notice h4{margin:0 0 6px;font-size:15.5px}
.notice p{margin:0;font-size:14px;color:var(--c-muted);line-height:1.85}
/* ---------- empty ---------- */
.empty-box{
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--radius-l);
  padding:64px 28px;text-align:center;box-shadow:var(--shadow-1);
}
.empty-box i{font-size:38px;color:#C9BED6;display:block;margin-bottom:14px}
.empty-box h2{font-size:22px;margin-bottom:10px}
.empty-box p{color:var(--c-muted);margin-bottom:22px}
/* ---------- download ---------- */
.dl-section{padding:72px 0;background:var(--c-ink);color:#EFEAF3}
.dl-section h2{color:#fff;margin-bottom:10px}
.dl-section .dl-sub{color:rgba(239,234,243,.72);max-width:680px;margin-bottom:32px}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-m);padding:26px 24px;transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.dl-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(0,0,0,.28);border-color:rgba(232,115,74,.5)}
.dl-card .dl-ico{font-size:26px;color:#F5B79C;display:block;margin-bottom:12px}
.dl-card h3{color:#fff;font-size:17px;margin-bottom:6px}
.dl-card p{color:rgba(239,234,243,.66);font-size:13.5px;margin-bottom:18px;line-height:1.75}
.dl-card .btn-main{width:100%;padding:11px 20px;font-size:14px}
/* ---------- back nav ---------- */
.back-section{padding:64px 0 78px}
.back-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.back-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  padding:24px 26px;box-shadow:var(--shadow-1);transition:transform .22s,box-shadow .22s,border-color .22s;
}
.back-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(74,46,99,.28);color:inherit}
.back-card .bc-t{font-size:15.5px;font-weight:700;color:var(--c-text);margin-bottom:2px}
.back-card .bc-s{font-size:13px;color:var(--c-muted);margin:0}
.back-card i{font-size:20px;color:var(--c-accent);transition:transform .22s}
.back-card:hover i{transform:translateX(5px)}
.back-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);color:rgba(239,234,243,.75);padding:64px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:36px}
.site-footer .brand-text strong{color:#fff}
.site-footer .brand-text em{color:rgba(239,234,243,.55)}
.foot-brand p{font-size:13.5px;line-height:1.85;color:rgba(239,234,243,.62);margin-top:16px;max-width:320px}
.site-footer h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.03em}
.foot-links{list-style:none;padding:0;margin:0}
.foot-links li{margin-bottom:10px}
.foot-links a{font-size:13.5px;color:rgba(239,234,243,.7);position:relative;transition:color .2s}
.foot-links a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:4px}
.foot-dl{display:flex;flex-direction:column;gap:9px}
.foot-dl a{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(239,234,243,.8);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-s);padding:8px 12px;transition:all .2s;
}
.foot-dl a:hover{color:#fff;background:rgba(232,115,74,.2);border-color:rgba(232,115,74,.5)}
.qr-box{
  display:grid;place-items:center;text-align:center;border-radius:var(--radius-s);
  border:1px dashed rgba(255,255,255,.22);color:rgba(239,234,243,.65);background:rgba(255,255,255,.04);
}
.foot-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  margin-top:42px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  font-size:12.5px;color:rgba(239,234,243,.55);
}
.foot-bottom .legal{display:flex;flex-wrap:wrap;gap:18px}
.foot-bottom .legal a{color:rgba(239,234,243,.6);font-size:12.5px}
.foot-bottom .legal a:hover{color:var(--c-accent)}
/* ---------- responsive ---------- */
@media (max-width:1199px){
  .wrap{padding:0 20px}
}
@media (max-width:991px){
  .nav-toggle{display:inline-flex}
  .stage-chips{display:none}
  .nav-main{
    display:none;position:absolute;top:100%;left:12px;right:12px;
    background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
    box-shadow:var(--shadow-2);padding:14px 16px;flex-direction:column;align-items:stretch;gap:2px;
  }
  .nav-main.open{display:flex}
  .nav-link{padding:11px 10px;border-radius:8px}
  .nav-link.is-active::after{display:none}
  .mobile-chips{display:flex;gap:6px;padding:2px 0 12px;overflow-x:auto;scrollbar-width:none}
  .mobile-chips::-webkit-scrollbar{display:none}
  .art-card{padding:28px 26px}
  .dl-grid{grid-template-columns:1fr;gap:16px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
  .dl-section,.back-section{padding:56px 0}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .nav-wrap{min-height:66px;gap:12px}
  .brand-text em{display:none}
  .brand-mark{width:36px;height:36px;font-size:17px}
  .brand-text strong{font-size:15px}
  .art-head{padding:32px 0 28px}
  .art-lead{font-size:14.5px}
  .art-card{padding:22px 18px;border-radius:var(--radius-m)}
  .prose{font-size:15.5px;line-height:1.9}
  .prose h2{padding-left:11px;border-left-width:3px}
  .prose table{font-size:13.5px;display:block;overflow-x:auto;white-space:nowrap}
  .back-grid{grid-template-columns:1fr}
  .back-section{padding:44px 0 56px}
  .dl-section{padding:44px 0}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .back-actions .btn-main,.back-actions .btn-ghost{width:100%}
}
@media (max-width:520px){
  .wrap{padding:0 16px}
  h1{font-size:23px}
  .art-meta{font-size:12px;gap:8px 12px}
  .art-card{padding:18px 15px}
  .notice{flex-direction:column;gap:10px;padding:16px 18px}
  .dl-card{padding:20px 18px}
}

/* roulang page: category1 */
:root{
  --c-ink:#1B1626;
  --c-primary:#4A2E63;
  --c-primary-strong:#33204A;
  --c-accent:#E8734A;
  --c-accent-soft:#FBE7DE;
  --c-bg:#F7F4EF;
  --c-surface:#FFFFFF;
  --c-line:#E4DED5;
  --c-text:#241E2E;
  --c-muted:#6E6579;
  --c-ok:#3F8F6E;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 2px 10px rgba(35,25,50,.06);
  --shadow-2:0 10px 28px rgba(35,25,50,.10);
  --container:1180px;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --font-num:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0 0 .5em;font-weight:700;line-height:1.35;color:var(--c-primary-strong)}
h1{font-size:34px;line-height:1.3}
h2{font-size:27px}
h3{font-size:19px}
ul,ol{margin:0 0 1em;padding-left:1.2em}
.wrap{max-width:var(--container);margin:0 auto;padding:0 20px;width:100%}
.section{padding:78px 0;position:relative}
.section-alt{background:var(--c-surface)}
.section-dark{background:var(--c-ink);color:#EFEAF3}
.section-dark h2,.section-dark h3{color:#FFFFFF}
.section-dark p{color:rgba(239,234,243,.78)}
section[id]{scroll-margin-top:92px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--c-primary);
  background:rgba(74,46,99,.08);border:1px solid rgba(74,46,99,.16);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;font-weight:600;
}
.section-dark .eyebrow{color:#F3C4AE;background:rgba(232,115,74,.14);border-color:rgba(232,115,74,.32)}
.sec-head{max-width:760px;margin-bottom:34px}
.sec-head p{color:var(--c-muted);margin:0}
.section-dark .sec-head p{color:rgba(239,234,243,.72)}
/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;transition:all .22s ease;cursor:pointer;border:1px solid transparent}
.btn-main{background:var(--c-accent);color:#fff;border-radius:999px;padding:12px 26px;box-shadow:0 6px 18px rgba(232,115,74,.28)}
.btn-main:hover{background:var(--c-primary);color:#fff;box-shadow:0 10px 24px rgba(74,46,99,.3);transform:translateY(-1px)}
.btn-main:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(74,46,99,.24)}
.btn-ghost{background:transparent;border-color:rgba(74,46,99,.42);color:var(--c-primary);border-radius:999px;padding:12px 24px}
.btn-ghost:hover{background:rgba(74,46,99,.08);border-color:var(--c-primary);color:var(--c-primary-strong)}
.btn-text{background:none;color:var(--c-primary);padding:0;border:0}
.btn-text .ico{transition:transform .22s ease}
.btn-text:hover .ico{transform:translateX(4px)}
.btn-main:focus-visible,.btn-ghost:focus-visible,.btn-text:focus-visible,a:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}
.section-dark .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.section-dark .btn-ghost:hover{background:rgba(255,255,255,.1)}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(247,244,239,.94);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease,background .25s ease,backdrop-filter .25s ease;
}
.site-header.is-stuck{box-shadow:0 8px 22px rgba(35,25,50,.08);background:rgba(247,244,239,.86);backdrop-filter:blur(8px)}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:74px;position:relative}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--c-text)}
.brand:hover{color:var(--c-text)}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  background:linear-gradient(150deg,var(--c-primary),var(--c-primary-strong));
  color:#fff;display:grid;place-items:center;font-size:19px;font-weight:700;
  box-shadow:0 6px 14px rgba(74,46,99,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--c-muted);white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-link{
  position:relative;font-size:14.5px;color:#3B3348;padding:8px 11px;border-radius:10px;
  font-weight:500;white-space:nowrap;transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--c-primary);background:rgba(74,46,99,.07)}
.nav-link.is-active{color:var(--c-primary);font-weight:700}
.nav-link.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent);
}
.nav-side{display:flex;align-items:center;gap:12px;margin-left:auto}
.stage-chips{display:flex;align-items:center;gap:6px}
.chip{
  display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;
  border-radius:999px;padding:4px 11px;line-height:1.6;transition:transform .2s ease,box-shadow .2s ease;
  border:1px solid transparent;white-space:nowrap;cursor:default;
}
.chip:hover{transform:translateY(-2px)}
.chip-warm{color:#6E5C86;border-color:#CFC4DC;background:transparent}
.chip-live{color:#fff;background:var(--c-accent);box-shadow:0 4px 12px rgba(232,115,74,.3)}
.chip-live i{width:6px;height:6px;border-radius:50%;background:#fff;display:inline-block;animation:pulse 1.8s infinite}
.chip-back{color:var(--c-primary);background:rgba(74,46,99,.09);border-color:rgba(74,46,99,.14)}
@keyframes pulse{0%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}100%{opacity:1;transform:scale(1)}}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-primary);font-size:20px;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(74,46,99,.07)}
.mobile-chips{display:none}
/* ---------- category head ---------- */
.cat-head{
  padding:40px 0 34px;
  background:linear-gradient(180deg,#FBF8F3 0%,var(--c-bg) 100%);
  border-bottom:1px solid var(--c-line);
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:16px;flex-wrap:wrap}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-accent)}
.crumb i{font-size:11px;opacity:.6}
.crumb span{color:var(--c-primary);font-weight:600}
.cat-head-inner{display:grid;grid-template-columns:1fr auto;gap:34px;align-items:start}
.cat-head h1{font-size:32px;margin-bottom:12px}
.cat-head h1 span{color:var(--c-accent)}
.cat-lead{max-width:680px;color:var(--c-muted);font-size:15.5px;margin-bottom:14px}
.age-note{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:#7A4B33;
  background:var(--c-accent-soft);border:1px solid #F3CDBC;border-radius:999px;padding:6px 14px;
}
.age-note b{background:var(--c-accent);color:#fff;border-radius:5px;padding:1px 6px;font-size:11px;letter-spacing:.04em}
.cat-tags{display:flex;flex-direction:column;gap:8px;min-width:170px}
.cat-tag{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-primary);
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-s);
  padding:9px 14px;box-shadow:var(--shadow-1);white-space:nowrap;
}
.cat-tag i{color:var(--c-accent)}
/* ---------- anchor bar ---------- */
.anchor-bar{padding:22px 0;background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.anchor-list{display:flex;flex-wrap:wrap;gap:10px}
.anchor-item{
  display:inline-flex;align-items:center;gap:7px;font-size:13.5px;font-weight:600;color:#3B3348;
  border:1px solid var(--c-line);border-radius:999px;padding:8px 16px;background:#FCFAF6;
  transition:all .2s ease;
}
.anchor-item i{color:var(--c-accent);font-size:14px}
.anchor-item:hover{color:var(--c-primary);border-color:rgba(74,46,99,.35);background:rgba(74,46,99,.06);transform:translateY(-2px)}
/* ---------- topic grid ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.topic-card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--radius-m);overflow:hidden;box-shadow:var(--shadow-1);color:inherit;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(74,46,99,.22);color:inherit}
.tc-cover{aspect-ratio:16/10;background:var(--c-line);overflow:hidden}
.tc-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.topic-card:hover .tc-cover img{transform:scale(1.03)}
.tc-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge-cat{
  align-self:flex-start;font-size:11.5px;font-weight:700;letter-spacing:.04em;
  color:#A84A26;background:var(--c-accent-soft);border-radius:6px;padding:3px 9px;
}
.tc-title{font-size:17.5px;font-weight:700;line-height:1.5;margin:0;color:var(--c-primary-strong)}
.tc-desc{
  font-size:13.8px;color:var(--c-muted);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.tc-meta{
  display:flex;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--c-muted);
  border-top:1px dashed var(--c-line);padding-top:12px;margin-top:auto;
}
.tc-meta i{color:var(--c-accent);margin-right:4px}
/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
.split p{color:#453B55}
.point-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.point-list li{
  display:grid;grid-template-columns:26px 1fr;gap:12px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--radius-s);padding:14px 16px;box-shadow:var(--shadow-1);
  font-size:14.2px;color:#3B3348;line-height:1.75;
}
.point-list i{color:var(--c-ok);font-size:16px;line-height:1.7}
.point-list strong{display:block;color:var(--c-primary-strong);font-size:14.5px;margin-bottom:2px}
/* ---------- scene ---------- */
.scene-list{display:flex;flex-direction:column;gap:26px}
.scene-row{
  display:grid;grid-template-columns:.85fr 1.15fr;gap:30px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  overflow:hidden;box-shadow:var(--shadow-1);transition:box-shadow .25s ease,transform .25s ease;
}
.scene-row:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.scene-row.rev{grid-template-columns:1.15fr .85fr}
.scene-row.rev .scene-media{order:2}
.scene-media{aspect-ratio:4/3;background:var(--c-line);overflow:hidden;height:100%}
.scene-media img{width:100%;height:100%;object-fit:cover}
.scene-body{padding:24px 26px}
.scene-body h3{margin-bottom:8px;font-size:20px}
.scene-body p{color:var(--c-muted);font-size:14.5px;margin:0}
.scene-tag{font-size:11.5px;font-weight:700;color:var(--c-primary);background:rgba(74,46,99,.08);border-radius:6px;padding:3px 9px;display:inline-block;margin-bottom:10px;letter-spacing:.04em}
/* ---------- safety ---------- */
.safety-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.safety-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-m);padding:24px 20px;transition:all .25s ease;
}
.safety-card:hover{background:rgba(255,255,255,.1);border-color:rgba(232,115,74,.5);transform:translateY(-3px)}
.safety-card i{font-size:22px;color:#F5B79C;display:block;margin-bottom:12px}
.safety-card h3{font-size:16.5px;margin-bottom:6px}
.safety-card p{font-size:13.6px;margin:0;line-height:1.75}
/* ---------- feature ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.feature-card{
  display:grid;grid-template-columns:150px 1fr;gap:18px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-m);
  overflow:hidden;padding:0;box-shadow:var(--shadow-1);color:inherit;
  transition:all .25s ease;
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(74,46,99,.22);color:inherit}
.feature-card img{width:100%;height:100%;min-height:150px;object-fit:cover}
.feature-body{padding:20px 22px 20px 0}
.feature-body h3{font-size:18px;margin-bottom:6px}
.feature-body p{font-size:13.8px;color:var(--c-muted);margin:0}
/* ---------- terms ---------- */
.term-list{border-top:1px solid var(--c-line)}
.term-item{
  display:grid;grid-template-columns:64px 1fr;gap:20px;
  padding:24px 0;border-bottom:1px solid var(--c-line);
}
.term-num{font-family:var(--font-num);font-size:24px;font-weight:700;color:var(--c-accent);line-height:1.2}
.term-item h3{font-size:17.5px;margin-bottom:6px}
.term-item p{color:var(--c-muted);font-size:14.2px;margin:0}
/* ---------- download ---------- */
.dl-band{
  background:linear-gradient(120deg,var(--c-primary-strong),var(--c-primary) 60%,#5A3878 100%);
  border-radius:var(--radius-l);padding:40px 38px;color:#F6F1FA;
  display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;
  box-shadow:var(--shadow-2);
}
.dl-band h2{color:#fff;font-size:24px;margin-bottom:8px}
.dl-band p{color:rgba(246,241,250,.82);margin:0;font-size:14.2px}
.dl-cards{display:flex;flex-wrap:wrap;gap:12px}
.dl-btn{
  display:inline-flex;align-items:center;gap:9px;font-size:14px;font-weight:600;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.28);color:#fff;
  border-radius:999px;padding:11px 22px;transition:all .22s ease;
}
.dl-btn:hover{background:var(--c-accent);border-color:var(--c-accent);color:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(232,115,74,.35)}
.dl-btn i{font-size:16px}
/* ---------- more ---------- */
.more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:26px}
.more-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius-s);
  padding:16px 18px;color:#3B3348;font-size:14.2px;font-weight:600;box-shadow:var(--shadow-1);
  transition:all .22s ease;
}
.more-link i{color:var(--c-accent);transition:transform .22s ease}
.more-link:hover{color:var(--c-primary);border-color:rgba(74,46,99,.28);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.more-link:hover i{transform:translateX(4px)}
.back-row{display:flex;flex-wrap:wrap;gap:14px}
/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);color:rgba(239,234,243,.72);padding:60px 0 0;margin-top:0}
.site-footer a{color:rgba(239,234,243,.72)}
.site-footer a:hover{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.foot-brand .brand-text strong{color:#fff}
.foot-brand .brand-text em{color:rgba(239,234,243,.55)}
.foot-brand p{font-size:13.6px;margin:14px 0 0;line-height:1.8;color:rgba(239,234,243,.62)}
.site-footer h4{font-size:14px;color:#fff;margin:0 0 14px;font-weight:700;letter-spacing:.04em}
.foot-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px;font-size:13.6px}
.foot-dl{display:flex;flex-direction:column;gap:9px;font-size:13.6px}
.foot-dl a{display:inline-flex;align-items:center;gap:8px}
.foot-dl i{color:var(--c-accent)}
.qr-box{
  display:grid;place-items:center;text-align:center;border:1px dashed rgba(239,234,243,.3);
  border-radius:var(--radius-s);color:rgba(239,234,243,.6);line-height:1.4;
}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:18px 0;display:flex;flex-wrap:wrap;
  gap:12px;justify-content:space-between;font-size:12.8px;color:rgba(239,234,243,.55);
}
.legal{display:flex;flex-wrap:wrap;gap:16px}
/* ---------- responsive ---------- */
@media (max-width:1150px){
  .nav-main{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--c-surface);border-bottom:1px solid var(--c-line);box-shadow:var(--shadow-2);
    padding:14px 20px 20px;margin:0;display:none;
  }
  .nav-main.is-open{display:flex}
  .nav-main .nav-link{padding:11px 12px;font-size:15px}
  .stage-chips{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:10px}
  .cat-head-inner{grid-template-columns:1fr}
  .cat-tags{flex-direction:row;flex-wrap:wrap}
}
@media (max-width:991px){
  .section{padding:56px 0}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .safety-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:28px}
  .feature-grid{grid-template-columns:1fr}
  .more-grid{grid-template-columns:1fr}
  .dl-band{grid-template-columns:1fr;padding:32px 26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .scene-row,.scene-row.rev{grid-template-columns:1fr}
  .scene-row.rev .scene-media{order:0}
  .scene-media{aspect-ratio:16/9}
  h1{font-size:30px}
  .cat-head h1{font-size:27px}
}
@media (max-width:767px){
  .brand-text strong{font-size:14.5px}
  .brand-text em{font-size:10.5px}
  .brand-mark{width:36px;height:36px;font-size:17px}
  .nav-side .btn-main{display:none}
  .section{padding:44px 0}
  .topic-grid{grid-template-columns:1fr}
  .safety-grid{grid-template-columns:1fr}
  .term-item{grid-template-columns:44px 1fr;gap:14px}
  .feature-card{grid-template-columns:1fr}
  .feature-card img{min-height:170px}
  .feature-body{padding:0 20px 20px}
  .anchor-list{gap:8px}
  .anchor-item{font-size:12.8px;padding:7px 13px}
  .dl-btn{width:100%;justify-content:center}
  h2{font-size:22px}
  h1{font-size:26px}
}
@media (max-width:520px){
  .wrap{padding:0 15px}
  .brand-text em{display:none}
  .cat-head{padding:26px 0 24px}
  .cat-head h1{font-size:23px}
  .cat-lead{font-size:14.5px}
  .dl-band{padding:26px 20px}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{flex-direction:column}
  .scene-body{padding:18px 18px 20px}
  .tc-body{padding:15px 16px 17px}
}