/* roulang page: index */
:root{
  --primary:#E1552C;
  --primary-dark:#C94A24;
  --primary-soft:rgba(225,85,44,.08);
  --ink:#17211E;
  --green:#2F7A68;
  --green-soft:rgba(47,122,104,.08);
  --gold:#E9B44C;
  --bg:#FBF7F1;
  --bg-alt:#F2ECE2;
  --white:#FFFFFF;
  --line:#E4DCD0;
  --text:#1B2422;
  --muted:#5C6663;
  --radius-lg:18px;
  --radius-sm:12px;
  --radius-xs:10px;
  --shadow:0 10px 30px rgba(23,33,30,.06);
  --shadow-hover:0 16px 40px rgba(23,33,30,.12);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;color:var(--ink);letter-spacing:-.01em;}
a{color:var(--ink);text-decoration:none;transition:color .2s,background-color .2s,border-color .2s,box-shadow .25s,transform .25s;}
a:hover{color:var(--primary);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
button{font-family:inherit;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.site-header.is-scrolled{box-shadow:0 1px 0 var(--line),0 8px 24px rgba(23,33,30,.05);}
.header-inner{
  display:flex;align-items:center;gap:28px;
  min-height:76px;
}
.logo{
  display:inline-flex;align-items:center;gap:9px;
  font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;
  white-space:nowrap;
}
.logo-dot{
  width:8px;height:8px;border-radius:3px;background:var(--primary);
  flex:0 0 auto;
}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;font-size:16px;letter-spacing:.02em;color:var(--text);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;
  width:0;height:2px;background:var(--primary);
  transform:translateX(-50%);transition:width .25s;
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{width:60%;}
.nav-cta{
  margin-left:6px;font-size:15px;padding:10px 20px;border-radius:999px;
  border:1px solid var(--primary);color:var(--primary);background:transparent;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);}
.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--white);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .25s,opacity .25s;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:12px 26px;border-radius:999px;
  font-size:16px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:color .2s,background-color .2s,border-color .2s,box-shadow .25s,transform .2s;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(225,85,44,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(225,85,44,.28);}
.btn-outline{border-color:var(--primary);color:var(--primary);background:transparent;}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-light{background:var(--white);color:var(--ink);border-color:var(--line);}
.btn-light:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-block{width:100%;}
.btn-sm{min-height:38px;padding:8px 18px;font-size:14.5px;}

/* ---------- shared section ---------- */
.section{padding:84px 0;}
.section-white{background:var(--white);}
.section-alt{background:var(--bg-alt);}
.section-paper{background:var(--bg);}
.section-head{margin-bottom:44px;display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--primary);text-transform:uppercase;margin:0 0 10px;
}
.section-head h2{font-size:clamp(23px,2.8vw,34px);line-height:1.3;font-weight:700;max-width:760px;}
.section-lead{color:var(--muted);font-size:15.5px;line-height:1.85;max-width:640px;margin:14px 0 0;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--primary);
  border-bottom:1px solid rgba(225,85,44,.4);padding-bottom:2px;
}
.text-link:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark);}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;line-height:1;letter-spacing:.02em;
  border:1px solid var(--line);color:var(--muted);background:var(--white);
}
.tag-primary{background:var(--primary-soft);border-color:rgba(225,85,44,.28);color:var(--primary);}
.tag-green{background:var(--green-soft);border-color:rgba(47,122,104,.28);color:var(--green);}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:72px 0 76px;
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg) 62%,rgba(225,85,44,.05) 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start;}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.16;font-weight:800;letter-spacing:-.02em;margin-bottom:20px;}
.hero-sub{font-size:17.5px;color:var(--muted);max-width:540px;margin-bottom:16px;}
.hero-text{font-size:16px;color:var(--muted);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-side{display:grid;gap:18px;}
.hero-photo{position:relative;margin:0;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);background:var(--bg-alt);}
.hero-photo img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.hero-photo-cap{
  position:absolute;right:14px;bottom:14px;
  background:rgba(255,255,255,.94);color:var(--ink);
  font-size:12.5px;font-weight:600;padding:6px 12px;border-radius:999px;
}
.slot-panel{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px;box-shadow:var(--shadow);
}
.slot-title{font-size:14px;font-weight:700;color:var(--ink);margin:0 0 12px;letter-spacing:.02em;}
.slot-buttons{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.slot-btn{
  border:1px solid var(--line);background:var(--white);color:var(--muted);
  font-size:13.5px;padding:8px 14px;border-radius:999px;cursor:pointer;
  transition:all .2s;
}
.slot-btn:hover{border-color:var(--primary);color:var(--primary);}
.slot-btn.is-active{background:var(--primary);border-color:var(--primary);color:#fff;}
.slot-hint{font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 16px;min-height:76px;}

/* ---------- metric board ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow);
}
.metric{padding:26px 24px;border-left:1px solid var(--line);}
.metric:first-child{border-left:none;}
.metric-num{font-size:clamp(24px,2.6vw,32px);font-weight:800;color:var(--ink);letter-spacing:-.01em;line-height:1.2;}
.metric-num em{font-style:normal;color:var(--gold);}
.metric-label{font-size:12.5px;color:var(--muted);margin-top:6px;letter-spacing:.02em;}

/* ---------- feature matrix ---------- */
.matrix{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;}
.f-card{
  position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:24px;box-shadow:var(--shadow);
  transition:transform .25s,box-shadow .25s,border-color .25s;
  overflow:hidden;
}
.f-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);
  opacity:0;transition:opacity .25s;
}
.f-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(225,85,44,.32);}
.f-card:hover::before{opacity:1;}
.f-card:hover h3{color:var(--primary);}
.f-card h3{font-size:19px;font-weight:700;margin-bottom:10px;transition:color .2s;line-height:1.45;}
.f-card p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.8;}
.f-icon{
  width:34px;height:34px;border-radius:9px;border:1.5px solid rgba(225,85,44,.45);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
  color:var(--primary);font-size:14px;font-weight:700;
}
.f-card--lg{grid-column:span 3;}
.f-card--md{grid-column:span 3;}
.f-card--sm{grid-column:span 2;}
.f-card--wide{grid-column:span 6;}
.f-card--lg .f-img{border-radius:10px;overflow:hidden;margin-bottom:18px;background:var(--bg-alt);}
.f-card--lg .f-img img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.f-list{display:grid;gap:10px;margin-top:14px;}
.f-list li{font-size:14px;color:var(--muted);padding-left:16px;position:relative;line-height:1.75;}
.f-list li::before{content:"";position:absolute;left:0;top:10px;width:5px;height:5px;border-radius:50%;background:var(--primary);}

/* ---------- download ---------- */
.download{
  background:var(--bg-alt);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.download-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center;}
.download h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin-bottom:14px;}
.download p{color:var(--muted);font-size:15.5px;margin-bottom:0;}
.dl-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.dl-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:20px 18px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;
  display:flex;flex-direction:column;gap:6px;
}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.dl-platform{font-size:16px;font-weight:700;color:var(--ink);}
.dl-file{font-size:12.5px;color:var(--muted);letter-spacing:.02em;}
.dl-card .btn{margin-top:12px;}
.dl-note{grid-column:1/-1;font-size:12.5px;color:var(--muted);margin:6px 0 0;}

/* ---------- notes 三段 ---------- */
.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;position:relative;}
.notes-grid::before{
  content:"";position:absolute;top:34px;left:6%;right:6%;height:1px;
  border-top:1px dashed var(--line);z-index:0;
}
.note-card{
  position:relative;z-index:1;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:26px 24px;box-shadow:var(--shadow);
}
.note-step{
  width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  margin-bottom:16px;
}
.note-card h3{font-size:19px;font-weight:700;margin-bottom:14px;line-height:1.45;}
.note-list{display:grid;gap:12px;}
.note-list li{font-size:14.5px;color:var(--muted);line-height:1.75;padding-left:18px;position:relative;}
.note-list li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--green);
}
.note-list strong{color:var(--ink);font-weight:700;}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.compare-col{border-radius:var(--radius-lg);padding:26px 24px;}
.compare-col--wrong{background:var(--bg-alt);border:1px dashed #D6CBBA;}
.compare-col--right{background:var(--green-soft);border:1px solid rgba(47,122,104,.35);}
.compare-title{font-size:14px;font-weight:700;letter-spacing:.08em;margin:0 0 16px;}
.compare-col--wrong .compare-title{color:#8A7E6C;}
.compare-col--right .compare-title{color:var(--green);}
.compare-item{display:flex;gap:10px;font-size:15px;line-height:1.75;padding:9px 0;}
.compare-item + .compare-item{border-top:1px solid rgba(23,33,30,.07);}
.compare-col--wrong .compare-item{color:var(--muted);}
.compare-col--right .compare-item{color:var(--text);}
.compare-mark{flex:0 0 auto;font-weight:700;font-size:13px;line-height:1.9;}
.compare-col--wrong .compare-mark{color:#A79B89;}
.compare-col--right .compare-mark{color:var(--primary);}

/* ---------- milestone ---------- */
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative;padding-top:8px;}
.timeline::before{
  content:"";position:absolute;top:20px;left:5%;right:5%;height:1px;background:var(--line);
}
.tl-item{position:relative;padding-top:42px;}
.tl-dot{
  position:absolute;top:13px;left:0;width:14px;height:14px;border-radius:50%;
  background:var(--gold);border:3px solid var(--bg);box-shadow:0 0 0 1px var(--gold);
}
.tl-week{font-size:13px;font-weight:700;color:var(--primary);letter-spacing:.04em;margin-bottom:6px;}
.tl-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 16px 18px;box-shadow:var(--shadow);
}
.tl-card h3{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.5;}
.tl-card p{font-size:13.8px;color:var(--muted);margin:0;line-height:1.75;}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.scene-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.scene-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--bg-alt);}
.scene-body{padding:22px 24px 24px;}
.scene-body h3{font-size:19px;font-weight:700;margin-bottom:10px;line-height:1.45;}
.scene-body p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.8;}

/* ---------- gear ---------- */
.gear{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start;}
.gear h2{font-size:clamp(23px,2.8vw,32px);line-height:1.32;margin-bottom:16px;}
.gear p{color:var(--muted);font-size:15.5px;}
.gear-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:8px 24px;}
.gear-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 0;border-bottom:1px solid var(--line);}
.gear-row:last-child{border-bottom:none;}
.gear-name{font-size:15.5px;font-weight:600;color:var(--ink);}
.gear-desc{font-size:13px;color:var(--muted);margin-top:2px;font-weight:400;}

/* ---------- guard dark ---------- */
.guard{
  color:#EDE8DE;
  background:linear-gradient(rgba(23,33,30,.9),rgba(23,33,30,.94)),url('/assets/images/3f788a2944567fa7.jpg') center/cover no-repeat;
}
.guard h2{color:#F5F1E8;}
.guard .eyebrow{color:var(--gold);}
.guard .section-lead{color:rgba(237,232,222,.75);}
.guard-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.guard-list{display:grid;gap:0;}
.guard-item{display:flex;gap:18px;padding:18px 0;border-top:1px solid rgba(255,255,255,.14);}
.guard-item:last-child{border-bottom:1px solid rgba(255,255,255,.14);}
.guard-num{font-size:13px;font-weight:700;color:var(--gold);letter-spacing:.08em;line-height:1.9;flex:0 0 auto;}
.guard-item h3{color:#F7F3EA;font-size:17px;font-weight:700;margin-bottom:6px;line-height:1.5;}
.guard-item p{color:rgba(237,232,222,.72);font-size:14.5px;margin:0;line-height:1.8;}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:20px;}
.news-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px;box-shadow:var(--shadow);
  transition:transform .25s,box-shadow .25s;
  display:flex;flex-direction:column;
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.news-card:hover .news-title{color:var(--primary);}
.news-card--feature{grid-row:span 2;padding:0;overflow:hidden;}
.news-thumb{background:var(--bg-alt);}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.news-card--feature .news-body{padding:22px 24px 24px;}
.news-body{display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{font-size:17.5px;font-weight:700;line-height:1.5;color:var(--ink);transition:color .2s;margin:0;}
.news-card--feature .news-title{font-size:21px;}
.news-excerpt{font-size:14px;color:var(--muted);line-height:1.78;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:6px;}
.news-date{font-size:12.5px;color:var(--muted);}
.news-more{font-size:13.5px;font-weight:600;color:var(--primary);}
.news-card:hover .news-more{color:var(--primary-dark);}
.empty-state{
  background:var(--white);border:1px dashed var(--line);border-radius:var(--radius-lg);
  padding:48px 24px;text-align:center;
}
.empty-dot{display:inline-block;width:12px;height:12px;border-radius:50%;border:1.5px solid var(--line);margin-bottom:14px;}
.empty-state p{font-size:14px;color:var(--muted);margin:0;}

/* ---------- protection ---------- */
.protect-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.protect-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:20px 20px 22px;box-shadow:var(--shadow);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.protect-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(47,122,104,.35);}
.protect-icon{
  width:30px;height:30px;border-radius:8px;border:1.5px solid rgba(47,122,104,.45);
  display:flex;align-items:center;justify-content:center;color:var(--green);
  font-size:13px;font-weight:700;margin-bottom:14px;
}
.protect-card h3{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.5;}
.protect-card p{font-size:13.8px;color:var(--muted);margin:0;line-height:1.75;}

/* ---------- quick answers ---------- */
.qa-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:6px 28px;}
.qa-row{display:flex;gap:16px;padding:22px 0;border-bottom:1px solid var(--line);}
.qa-row:last-child{border-bottom:none;}
.qa-dot{flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--primary);margin-top:11px;}
.qa-q{font-size:17px;font-weight:700;color:var(--ink);margin:0 0 6px;line-height:1.6;}
.qa-a{font-size:15px;color:var(--muted);margin:0;line-height:1.85;}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-btn{
  width:100%;min-height:60px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:none;cursor:pointer;
  padding:16px 8px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink);
  transition:background-color .2s,color .2s;
}
.faq-btn:hover{color:var(--primary);}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--primary);line-height:1;}
.faq-item.is-open .faq-btn{color:var(--primary);}
.faq-item.is-open .faq-btn{background:var(--bg-alt);}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .32s ease;background:var(--bg-alt);}
.faq-item.is-open .faq-panel{max-height:420px;}
.faq-panel p{margin:0;padding:0 8px 20px;font-size:15.5px;line-height:1.9;color:var(--muted);}

/* ---------- form ---------- */
.convert{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;}
.convert h2{font-size:clamp(23px,2.8vw,32px);line-height:1.32;margin-bottom:14px;}
.convert p{color:var(--muted);font-size:15.5px;}
.convert-dl{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px;}
.form-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;box-shadow:var(--shadow-hover);
}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;
  border:1px solid var(--line);border-radius:var(--radius-xs);
  background:var(--bg);color:var(--text);font-size:15px;font-family:inherit;
  transition:border-color .2s,box-shadow .2s,background-color .2s;
}
.field textarea{min-height:88px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:var(--white);
  box-shadow:0 0 0 2px rgba(225,85,44,.15);
}
.form-note{font-size:12.5px;color:var(--muted);margin:12px 0 0;text-align:center;}
.form-tip{
  display:none;margin-top:14px;padding:12px 14px;border-radius:var(--radius-xs);
  background:var(--green-soft);border:1px solid rgba(47,122,104,.3);
  color:var(--green);font-size:13.5px;line-height:1.7;
}
.form-tip.is-show{display:block;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9E4DA;padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.foot-logo{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#F7F3EA;margin:0 0 12px;}
.foot-desc{font-size:14px;color:rgba(233,228,218,.7);line-height:1.8;margin:0 0 18px;max-width:280px;}
.foot-downloads{display:flex;flex-direction:column;gap:8px;}
.foot-downloads a{font-size:13.5px;color:rgba(233,228,218,.78);}
.foot-downloads a:hover{color:var(--gold);}
.foot-title{font-size:13px;font-weight:700;letter-spacing:.1em;color:rgba(233,228,218,.55);margin:0 0 14px;}
.foot-col{display:flex;flex-direction:column;gap:10px;}
.foot-col a{font-size:14.5px;color:rgba(233,228,218,.85);}
.foot-col a:hover{color:var(--gold);}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;}
.foot-tags span{
  border:1px solid rgba(255,255,255,.18);border-radius:999px;
  padding:5px 11px;font-size:12.5px;color:rgba(233,228,218,.8);
}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 32px;max-width:1200px;margin:0 auto;}
.foot-bottom p{font-size:12.5px;color:rgba(233,228,218,.55);margin:0;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .container{padding:0 28px;}
  .hero-grid{gap:40px;}
  .matrix{grid-template-columns:repeat(6,1fr);}
}
@media (max-width:991px){
  .container{padding:0 24px;}
  .section{padding:64px 0;}
  .hero{padding:52px 0 60px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero h1{font-size:clamp(28px,5vw,38px);}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric{border-left:none;border-top:1px solid var(--line);}
  .metric:nth-child(odd){border-right:1px solid var(--line);}
  .metric:nth-child(1),.metric:nth-child(2){border-top:none;}
  .matrix{grid-template-columns:repeat(4,1fr);}
  .f-card--lg{grid-column:span 4;}
  .f-card--md{grid-column:span 4;}
  .f-card--sm{grid-column:span 2;}
  .f-card--wide{grid-column:span 4;}
  .download-inner{grid-template-columns:1fr;gap:28px;}
  .notes-grid{grid-template-columns:1fr;gap:18px;}
  .notes-grid::before{display:none;}
  .timeline{grid-template-columns:repeat(2,1fr);gap:22px;}
  .timeline::before{display:none;}
  .tl-item{padding-top:0;padding-left:26px;}
  .tl-dot{top:6px;left:0;}
  .scene-grid{grid-template-columns:1fr;}
  .gear{grid-template-columns:1fr;gap:28px;}
  .guard-grid{grid-template-columns:1fr;gap:28px;}
  .news-grid{grid-template-columns:1fr 1fr;}
  .news-card--feature{grid-column:span 2;grid-row:auto;}
  .protect-grid{grid-template-columns:1fr 1fr;}
  .convert{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .compare{grid-template-columns:1fr;}
  .main-nav{
    position:fixed;left:0;right:0;top:76px;bottom:0;
    background:var(--bg);
    flex-direction:column;align-items:stretch;gap:0;
    padding:10px 24px 32px;
    border-top:1px solid var(--line);
    transform:translateY(-10px);opacity:0;visibility:hidden;
    transition:opacity .25s,transform .25s,visibility .25s;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:none;}
  .main-nav .nav-link{
    font-size:19px;padding:18px 0;border-bottom:1px solid var(--line);
  }
  .nav-link::after{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
}
@media (max-width:560px){
  .container{padding:0 18px;}
  .section{padding:48px 0;}
  .header-inner{min-height:62px;}
  .logo{font-size:16px;}
  .main-nav{top:62px;}
  .hero{padding:38px 0 46px;}
  .hero-actions .btn{width:100%;}
  .metrics{grid-template-columns:1fr;}
  .metric{border-right:none !important;border-top:1px solid var(--line);}
  .metric:first-child{border-top:none;}
  .matrix{grid-template-columns:1fr;}
  .f-card--lg,.f-card--md,.f-card--sm,.f-card--wide{grid-column:span 1;}
  .dl-cards{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .news-card--feature{grid-column:span 1;}
  .protect-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .qa-list{padding:2px 18px;}
  .faq-panel p{padding:0 4px 18px;}
  .form-card{padding:20px;}
  .foot-bottom{padding:18px 18px;}
  .gear-list{padding:4px 18px;}
  .slot-hint{min-height:0;}
  .btn{min-height:46px;}
}

/* roulang page: article */
:root{
  --primary:#E1552C;
  --primary-dark:#C94A24;
  --primary-soft:rgba(225,85,44,.08);
  --ink:#17211E;
  --green:#2F7A68;
  --green-soft:rgba(47,122,104,.08);
  --gold:#E9B44C;
  --bg:#FBF7F1;
  --bg-alt:#F2ECE2;
  --white:#FFFFFF;
  --line:#E4DCD0;
  --text:#1B2422;
  --muted:#5C6663;
  --radius-lg:18px;
  --radius-sm:12px;
  --radius-xs:10px;
  --shadow:0 10px 30px rgba(23,33,30,.06);
  --shadow-hover:0 16px 40px rgba(23,33,30,.12);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{list-style:none;margin:0;padding:0;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color .2s,background-color .2s,border-color .2s,box-shadow .25s,transform .25s;}
a:hover{color:var(--primary);}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.site-header.is-scrolled{box-shadow:0 1px 0 var(--line),0 8px 24px rgba(23,33,30,.05);}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px;}
.logo{
  display:inline-flex;align-items:center;gap:9px;
  font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;
}
.logo-dot{width:8px;height:8px;border-radius:3px;background:var(--primary);flex:0 0 auto;}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{position:relative;font-size:16px;letter-spacing:.02em;color:var(--text);padding:6px 0;}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;
  background:var(--primary);transform:translateX(-50%);transition:width .25s;
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{width:60%;}
.nav-cta{
  margin-left:6px;font-size:15px;padding:10px 20px;border-radius:999px;
  border:1px solid var(--primary);color:var(--primary);background:transparent;white-space:nowrap;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;
  border:1px solid var(--line);border-radius:12px;background:var(--white);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .25s,opacity .25s;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:12px 26px;border-radius:999px;
  font-size:16px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:color .2s,background-color .2s,border-color .2s,box-shadow .25s,transform .2s;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(225,85,44,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(225,85,44,.28);}
.btn-outline{border-color:var(--primary);color:var(--primary);background:transparent;}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-light{background:var(--white);color:var(--ink);border-color:var(--line);}
.btn-light:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-sm{min-height:38px;padding:8px 18px;font-size:14.5px;}
.btn.is-disabled{opacity:.45;cursor:not-allowed;pointer-events:none;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);
  border-bottom:1px solid rgba(225,85,44,.4);padding-bottom:2px;
}
.text-link:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark);}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;line-height:1;letter-spacing:.02em;
  border:1px solid var(--line);color:var(--muted);background:var(--white);
}
.tag-green{background:var(--green-soft);border-color:rgba(47,122,104,.28);color:var(--green);}

/* ---------- article head ---------- */
.article-head{padding:44px 0 0;background:var(--bg);}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--muted);
  border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:38px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:#C8BFB2;}
.breadcrumb .current{color:var(--text);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--primary);
  margin-bottom:14px;
}
.article-kicker::before{content:"";width:18px;height:1px;background:var(--primary);display:inline-block;}
.article-title{font-size:clamp(26px,3.4vw,40px);line-height:1.3;font-weight:800;letter-spacing:-.015em;max-width:840px;color:var(--ink);}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin:22px 0 0;font-size:12.5px;color:var(--muted);}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px;}
.article-meta .divider{width:1px;height:14px;background:var(--line);}
.article-head-line{height:1px;background:var(--line);margin:40px 0 0;}

/* ---------- article body ---------- */
.article-main{padding:48px 0 84px;background:var(--bg);}
.article-wrap{max-width:760px;margin:0 auto;}
.key-points{
  background:var(--bg-alt);
  border:1px solid var(--line);
  border-left:3px solid var(--primary);
  border-radius:var(--radius-sm);
  padding:24px 26px;
  margin-bottom:28px;
}
.key-points-title{font-size:14px;font-weight:700;letter-spacing:.1em;color:var(--primary);margin-bottom:12px;}
.key-points li{position:relative;padding-left:18px;font-size:15px;line-height:1.9;color:var(--muted);margin-bottom:8px;}
.key-points li:last-child{margin-bottom:0;}
.key-points li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--primary);
}
.article-content{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  padding:44px 48px;
  font-size:16.5px;
  line-height:1.95;
  color:var(--text);
  overflow-wrap:break-word;
  word-break:break-word;
}
.article-content h2{
  font-size:clamp(21px,2.4vw,27px);font-weight:700;line-height:1.45;color:var(--ink);
  margin:44px 0 16px;padding-left:14px;border-left:3px solid var(--primary);
}
.article-content h2:first-child{margin-top:0;}
.article-content h3{font-size:20px;font-weight:700;line-height:1.5;color:var(--ink);margin:28px 0 12px;}
.article-content h4{font-size:17px;font-weight:700;color:var(--ink);margin:22px 0 10px;}
.article-content p{margin:0 0 18px;}
.article-content ul{list-style:disc;padding-left:22px;margin:0 0 18px;}
.article-content ol{list-style:decimal;padding-left:22px;margin:0 0 18px;}
.article-content li{margin-bottom:8px;line-height:1.9;}
.article-content blockquote{
  margin:24px 0;padding:20px 22px;background:var(--bg);color:var(--muted);
  border-left:3px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.article-content img{border-radius:14px;margin:24px auto;}
.article-content figure{margin:24px 0;}
.article-content figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;}
.article-content a{color:var(--primary);border-bottom:1px solid rgba(225,85,44,.4);}
.article-content a:hover{border-bottom-color:var(--primary);}
.article-content table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;display:block;overflow-x:auto;}
.article-content th,.article-content td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;}
.article-content th{background:var(--bg-alt);font-weight:700;color:var(--ink);}
.article-content strong{color:var(--ink);font-weight:700;}
.article-empty{text-align:center;padding:56px 0;}
.article-empty .empty-dot{
  display:inline-block;width:14px;height:14px;border:1px solid var(--line);border-radius:50%;margin-bottom:16px;
}
.article-empty p{color:var(--muted);font-size:15px;margin-bottom:22px;}

/* ---------- cta strip ---------- */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  margin-top:32px;padding:28px 32px;
  background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius-lg);
}
.cta-strip h2{font-size:20px;font-weight:700;color:var(--ink);line-height:1.45;margin-bottom:6px;}
.cta-strip p{font-size:14px;color:var(--muted);line-height:1.8;}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- related ---------- */
.article-related{margin-top:56px;}
.related-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:22px;}
.related-head h2{font-size:22px;font-weight:700;color:var(--ink);}
.read-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.read-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s;
}
.read-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(225,85,44,.35);}
.read-card .read-tag{font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--green);}
.read-card .read-title{font-size:16.5px;font-weight:700;line-height:1.55;color:var(--ink);}
.read-card:hover .read-title{color:var(--primary);}
.read-card .read-desc{font-size:13.5px;line-height:1.8;color:var(--muted);}

/* ---------- post nav ---------- */
.post-nav{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:28px;border-top:1px solid var(--line);
}
.post-nav-btns{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9E4DA;padding:64px 0 0;border-top:1px solid var(--line);}
.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr 1fr;gap:36px;padding-bottom:44px;}
.foot-logo{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.foot-desc{color:rgba(233,228,218,.72);font-size:14.5px;line-height:1.8;margin-bottom:18px;max-width:340px;}
.foot-downloads{display:flex;flex-direction:column;gap:8px;}
.foot-downloads a{color:#E9E4DA;font-size:14px;width:fit-content;border-bottom:1px solid transparent;transition:color .2s,border-color .2s;}
.foot-downloads a:hover{color:var(--gold);border-bottom-color:rgba(233,180,76,.5);}
.foot-title{font-size:13px;letter-spacing:.1em;color:rgba(233,228,218,.5);margin-bottom:14px;font-weight:700;}
.foot-col a{display:block;color:#E9E4DA;font-size:14.5px;padding:5px 0;transition:color .2s;}
.foot-col a:hover{color:var(--gold);}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;}
.foot-tags span{
  border:1px solid rgba(255,255,255,.18);border-radius:999px;
  padding:4px 12px;font-size:12.5px;color:rgba(233,228,218,.8);
}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);}
.foot-bottom p{max-width:1200px;margin:0 auto;padding:20px 32px;font-size:13px;color:rgba(233,228,218,.55);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .read-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:960px){
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;left:0;right:0;top:76px;bottom:0;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg);padding:8px 24px 40px;margin-left:0;
    transform:translateX(100%);transition:transform .3s ease;
    overflow-y:auto;border-top:1px solid var(--line);
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:18px 0;border-bottom:1px solid var(--line);font-size:19px;}
  .nav-link::after{display:none;}
  .header-inner{min-height:76px;}
}
@media (max-width:768px){
  body{font-size:16px;line-height:1.85;}
  .article-head{padding:28px 0 0;}
  .breadcrumb{margin-bottom:26px;padding-bottom:14px;}
  .article-main{padding:32px 0 60px;}
  .article-content{padding:26px 20px;border-radius:var(--radius-sm);font-size:16px;line-height:1.9;}
  .article-content h2{margin-top:34px;padding-left:12px;}
  .key-points{padding:20px 18px;}
  .cta-strip{padding:24px 20px;border-radius:var(--radius-sm);}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .read-grid{grid-template-columns:1fr;}
  .post-nav{align-items:flex-start;flex-direction:column;}
  .post-nav-btns{width:100%;}
  .post-nav-btns .btn{flex:1;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .foot-bottom p{padding:18px 24px;}
}
@media (max-width:560px){
  .container{padding:0 18px;}
  .logo{font-size:16px;}
  .logo-dot{width:7px;height:7px;}
  .main-nav{top:62px;padding:8px 18px 36px;}
  .header-inner{min-height:62px;}
  .nav-toggle{width:42px;height:42px;}
  .article-title{font-size:24px;}
  .article-meta{gap:10px;font-size:12px;}
  .article-meta .divider{display:none;}
  .btn{min-height:46px;}
  .cta-strip h2{font-size:18px;}
  .foot-bottom p{padding:18px;}
}

/* roulang page: category1 */
:root{
  --primary:#E1552C;
  --primary-dark:#C94A24;
  --primary-soft:rgba(225,85,44,.08);
  --ink:#17211E;
  --green:#2F7A68;
  --green-soft:rgba(47,122,104,.08);
  --gold:#E9B44C;
  --bg:#FBF7F1;
  --bg-alt:#F2ECE2;
  --white:#FFFFFF;
  --line:#E4DCD0;
  --text:#1B2422;
  --muted:#5C6663;
  --radius-lg:18px;
  --radius-sm:12px;
  --radius-xs:10px;
  --shadow:0 10px 30px rgba(23,33,30,.06);
  --shadow-hover:0 16px 40px rgba(23,33,30,.12);
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color .2s,background-color .2s,border-color .2s,box-shadow .25s,transform .25s;}
a:hover{color:var(--primary);}
button{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.site-header.is-scrolled{box-shadow:0 1px 0 var(--line),0 8px 24px rgba(23,33,30,.05);}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px;}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}
.logo-dot{width:8px;height:8px;border-radius:3px;background:var(--primary);flex:0 0 auto;}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{position:relative;font-size:16px;letter-spacing:.02em;color:var(--text);padding:6px 0;}
.nav-link::after{content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;background:var(--primary);transform:translateX(-50%);transition:width .25s;}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{width:60%;}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{width:60%;}
.nav-cta{margin-left:6px;font-size:15px;padding:10px 20px;border-radius:999px;border:1px solid var(--primary);color:var(--primary);background:transparent;white-space:nowrap;}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--white);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--ink);transition:transform .25s,opacity .25s;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 26px;border-radius:999px;font-size:16px;font-weight:600;letter-spacing:.01em;border:1px solid transparent;cursor:pointer;transition:color .2s,background-color .2s,border-color .2s,box-shadow .25s,transform .2s;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(225,85,44,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(225,85,44,.28);}
.btn-outline{border-color:var(--primary);color:var(--primary);background:transparent;}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-light{background:var(--white);color:var(--ink);border-color:var(--line);}
.btn-light:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-sm{min-height:38px;padding:8px 18px;font-size:14.5px;}
/* ---------- section framework ---------- */
.section{padding:84px 0;}
.section-white{background:var(--white);}
.section-alt{background:var(--bg-alt);}
.section-paper{background:var(--bg);}
.section-head{margin-bottom:44px;display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.14em;color:var(--primary);text-transform:uppercase;margin:0 0 10px;}
.section-head h2,.block-title{font-size:clamp(23px,2.8vw,34px);line-height:1.3;font-weight:700;max-width:780px;}
.section-lead{color:var(--muted);font-size:15.5px;line-height:1.85;max-width:640px;margin:14px 0 0;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);border-bottom:1px solid rgba(225,85,44,.4);padding-bottom:2px;}
.text-link:hover{color:var(--primary-dark);border-bottom-color:var(--primary-dark);}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;line-height:1;letter-spacing:.02em;border:1px solid var(--line);color:var(--muted);background:var(--white);}
.tag-primary{background:var(--primary-soft);border-color:rgba(225,85,44,.28);color:var(--primary);}
.tag-green{background:var(--green-soft);border-color:rgba(47,122,104,.28);color:var(--green);}
/* ---------- category page head ---------- */
.page-head{background:var(--bg-alt);border-bottom:1px solid var(--line);padding:30px 0 40px;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);padding-bottom:16px;border-bottom:1px dashed var(--line);}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:#B9B0A4;}
.crumbs .now{color:var(--ink);font-weight:600;}
.page-head-grid{display:grid;grid-template-columns:1.45fr .75fr;gap:44px;align-items:end;padding-top:26px;}
.page-head h1{font-size:clamp(28px,3.6vw,42px);line-height:1.2;font-weight:800;letter-spacing:-.02em;margin-bottom:14px;}
.page-head p{color:var(--muted);font-size:16px;max-width:620px;}
.page-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end;}
/* ---------- filter ---------- */
.filter-bar{display:flex;gap:10px;overflow-x:auto;padding:4px 0 14px;scrollbar-width:thin;}
.filter-chip{flex:0 0 auto;min-height:40px;padding:8px 20px;border-radius:999px;border:1px solid var(--line);background:var(--white);color:var(--muted);font-size:14.5px;cursor:pointer;transition:color .2s,background-color .2s,border-color .2s,transform .2s;white-space:nowrap;}
.filter-chip:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.filter-chip.is-active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 8px 18px rgba(225,85,44,.22);}
.filter-panel{display:none;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:32px;margin-top:8px;}
.filter-panel.is-active{display:block;animation:fadeUp .3s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:translateY(0);}}
.filter-panel h3{font-size:20px;font-weight:700;margin-bottom:6px;}
.filter-panel .panel-note{font-size:14.5px;color:var(--muted);margin-bottom:20px;}
.note-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 32px;}
.note-list li{position:relative;padding-left:20px;font-size:15.5px;line-height:1.8;color:var(--muted);}
.note-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--primary);}
.note-list li strong{display:block;color:var(--ink);font-size:16px;font-weight:700;margin-bottom:2px;}
/* ---------- steps + metrics ---------- */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.step-card{position:relative;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s;}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(225,85,44,.35);}
.step-num{font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--primary);}
.step-card h3{font-size:19px;font-weight:700;margin:10px 0 8px;}
.step-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.metric-row{display:grid;grid-template-columns:repeat(4,1fr);background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;margin-top:32px;box-shadow:var(--shadow);}
.metric-cell{padding:24px 22px;border-right:1px solid var(--line);}
.metric-cell:last-child{border-right:0;}
.metric-value{display:block;font-size:22px;font-weight:800;letter-spacing:-.01em;color:var(--ink);line-height:1.3;}
.metric-value.gold{color:#B98A28;}
.metric-label{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;letter-spacing:.02em;}
/* ---------- gear list ---------- */
.gear-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start;}
.gear-intro h2{font-size:clamp(23px,2.8vw,32px);font-weight:700;line-height:1.32;margin-bottom:16px;}
.gear-intro p{color:var(--muted);font-size:15.5px;margin-bottom:20px;}
.gear-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);}
.gear-item{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 24px;border-bottom:1px solid var(--line);transition:background-color .2s,padding-left .2s;}
.gear-item:last-child{border-bottom:0;}
.gear-item:hover{background:var(--bg);padding-left:28px;}
.gear-name{font-size:16px;font-weight:600;}
.gear-desc{display:block;font-size:13.5px;font-weight:400;color:var(--muted);margin-top:2px;}
/* ---------- contrast ---------- */
.contrast-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.contrast-col{border-radius:var(--radius-lg);padding:26px 24px;}
.contrast-col.wrong{background:var(--bg-alt);border:1px dashed #CFC5B6;}
.contrast-col.right{background:var(--green-soft);border:1px solid rgba(47,122,104,.3);}
.contrast-col h3{font-size:14px;letter-spacing:.12em;font-weight:700;margin-bottom:16px;}
.contrast-col.wrong h3{color:var(--muted);}
.contrast-col.right h3{color:var(--green);}
.contrast-col li{position:relative;padding-left:22px;font-size:15.5px;line-height:1.8;margin-bottom:14px;color:var(--text);}
.contrast-col li:last-child{margin-bottom:0;}
.contrast-col.wrong li::before{content:"✕";position:absolute;left:0;top:0;font-size:12px;color:#A29889;}
.contrast-col.right li::before{content:"✓";position:absolute;left:0;top:0;font-size:13px;color:var(--primary);font-weight:700;}
/* ---------- mini timeline ---------- */
.mini-timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative;}
.mini-timeline::before{content:"";position:absolute;left:4%;right:4%;top:11px;height:1px;background:var(--line);}
.mini-item{position:relative;padding-top:34px;}
.mini-item::before{content:"";position:absolute;left:0;top:5px;width:13px;height:13px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(233,180,76,.18);}
.mini-week{font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--primary);display:block;margin-bottom:6px;}
.mini-item h3{font-size:16.5px;font-weight:700;margin-bottom:6px;}
.mini-item p{font-size:14.5px;color:var(--muted);line-height:1.75;}
/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.scene-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.scene-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--bg-alt);}
.scene-body{padding:22px 24px 26px;}
.scene-body h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.scene-body p{font-size:15px;color:var(--muted);line-height:1.8;}
.scene-meta{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap;}
/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.news-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s;display:flex;flex-direction:column;gap:14px;}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(225,85,44,.3);}
.news-card h3{font-size:18px;font-weight:700;line-height:1.5;transition:color .2s;}
.news-card:hover h3{color:var(--primary);}
.news-card p{font-size:14.5px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:auto;font-size:12.5px;color:var(--muted);}
.news-meta .dot{width:1px;height:12px;background:var(--line);}
.news-more{display:flex;justify-content:center;margin-top:36px;}
.empty-state{display:flex;flex-direction:column;align-items:center;gap:12px;padding:48px 20px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);color:var(--muted);font-size:14px;}
.empty-state .empty-dot{width:14px;height:14px;border-radius:50%;border:1px solid var(--line);}
/* ---------- qa ---------- */
.qa-list{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);}
.qa-item{padding:24px 26px;border-bottom:1px solid var(--line);}
.qa-item:last-child{border-bottom:0;}
.qa-q{position:relative;padding-left:20px;font-size:17px;font-weight:700;margin-bottom:8px;}
.qa-q::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:var(--primary);}
.qa-a{font-size:15.5px;color:var(--muted);line-height:1.85;padding-left:20px;}
/* ---------- entry bar ---------- */
.entry-bar{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:44px 0;}
.entry-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.entry-inner h2{font-size:clamp(20px,2.4vw,26px);font-weight:700;}
.entry-inner p{font-size:14.5px;color:var(--muted);margin-top:6px;}
.entry-links{display:flex;gap:12px;flex-wrap:wrap;}
.entry-links a{display:inline-flex;align-items:center;min-height:42px;padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:var(--white);font-size:14.5px;color:var(--ink);}
.entry-links a:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#E9E4DA;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px;}
.foot-logo{display:inline-flex;align-items:center;gap:9px;font-size:18px;font-weight:700;color:#fff;margin-bottom:14px;}
.foot-desc{font-size:14.5px;line-height:1.85;color:rgba(233,228,218,.72);max-width:320px;}
.foot-downloads{display:flex;flex-direction:column;gap:8px;margin-top:18px;}
.foot-downloads a{font-size:14px;color:#E9E4DA;border-bottom:1px solid rgba(233,228,218,.25);width:fit-content;padding-bottom:2px;}
.foot-downloads a:hover{color:var(--gold);border-bottom-color:var(--gold);}
.foot-col{display:flex;flex-direction:column;gap:10px;}
.foot-title{font-size:13px;letter-spacing:.12em;color:rgba(233,228,218,.5);margin-bottom:6px;font-weight:700;}
.foot-col a{font-size:14.5px;color:#E9E4DA;}
.foot-col a:hover{color:var(--gold);}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px;}
.foot-tags span{font-size:12.5px;padding:5px 12px;border-radius:999px;border:1px solid rgba(233,228,218,.25);color:rgba(233,228,218,.8);}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 32px;text-align:center;font-size:13px;color:rgba(233,228,218,.6);}
.foot-bottom p{margin:0;}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .section{padding:64px 0;}
  .page-head-grid{grid-template-columns:1fr;gap:24px;align-items:start;}
  .page-tags{justify-content:flex-start;}
  .step-grid{grid-template-columns:1fr 1fr;}
  .step-grid .step-card:last-child{grid-column:span 2;}
  .gear-wrap{grid-template-columns:1fr;gap:32px;}
  .mini-timeline{grid-template-columns:repeat(3,1fr);row-gap:28px;}
  .mini-timeline::before{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:920px){
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .main-nav{position:fixed;left:0;right:0;top:76px;bottom:0;margin:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border-top:1px solid var(--line);padding:12px 24px 32px;display:none;overflow-y:auto;z-index:70;}
  .main-nav.is-open{display:flex;}
  .nav-link{font-size:19px;padding:18px 0;border-bottom:1px solid var(--line);}
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--primary);}
}
@media (max-width:768px){
  body{font-size:16px;line-height:1.8;}
  .header-inner{min-height:62px;gap:14px;}
  .logo{font-size:16px;}
  .site-header .container{padding:0 18px;}
  .main-nav{top:62px;padding:8px 18px 28px;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:30px;gap:16px;}
  .page-head{padding:22px 0 32px;}
  .page-head p{font-size:15px;}
  .filter-panel{padding:24px 20px;}
  .note-list{grid-template-columns:1fr;gap:14px;}
  .step-grid{grid-template-columns:1fr;}
  .step-grid .step-card:last-child{grid-column:auto;}
  .metric-row{grid-template-columns:repeat(2,1fr);}
  .metric-cell{border-right:0;border-bottom:1px solid var(--line);padding:18px;}
  .metric-cell:nth-child(odd){border-right:1px solid var(--line);}
  .metric-cell:nth-child(3),.metric-cell:nth-child(4){border-bottom:0;}
  .contrast-grid{grid-template-columns:1fr;}
  .scene-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .mini-timeline{grid-template-columns:1fr 1fr;row-gap:26px;}
  .entry-inner{flex-direction:column;align-items:flex-start;gap:18px;}
  .entry-links{width:100%;}
  .entry-links a{flex:1 1 auto;justify-content:center;}
  .qa-item{padding:20px 18px;}
  .qa-q{font-size:16px;}
  .site-footer{padding:48px 0 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .foot-bottom{padding:16px 18px;font-size:12.5px;}
}
@media (max-width:520px){
  .container{padding:0 18px;}
  .page-head h1{font-size:26px;}
  .btn{width:100%;}
  .filter-chip{min-height:38px;padding:7px 16px;font-size:14px;}
  .mini-timeline{grid-template-columns:1fr;}
  .metric-value{font-size:20px;}
  .news-card{padding:20px;}
}