/* roulang page: index */
:root{
  --orange:#F26B38;
  --orange-deep:#DE5A28;
  --teal:#163A3D;
  --mint:#2CC7A5;
  --paper:#F6F4EF;
  --paper-2:#EFEBE2;
  --dark:#0E1F21;
  --ink:#25302F;
  --muted:#6F7774;
  --line:#D9D4C8;
  --white:#ffffff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 30px rgba(14,31,33,.08);
  --shadow-lg:0 20px 46px rgba(14,31,33,.14);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  background:var(--paper);
  color:var(--ink);
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--orange);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--teal);letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(242,107,56,.22);}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(242,107,56,.30);border-radius:8px;
}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 22px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 14px rgba(14,31,33,.05);
}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--teal);
  display:flex;align-items:center;justify-content:center;position:relative;flex-shrink:0;
}
.brand-mark::before{
  content:"";width:14px;height:14px;border-radius:50%;
  border:2px solid var(--mint);border-right-color:var(--orange);
}
.brand-mark::after{
  content:"";position:absolute;inset:7px;border-radius:50%;
  border:1px solid rgba(255,255,255,.25);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;font-weight:800;font-size:15.5px;color:var(--teal);}
.brand-sub{font-size:11.5px;font-weight:600;color:var(--orange);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;font-size:15px;font-weight:600;
  color:var(--ink);border-radius:10px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--orange);background:rgba(242,107,56,.07);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--orange);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;background:var(--white);
  border:1px solid var(--line);border-radius:999px;padding:0 14px;height:42px;width:228px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box:focus-within{border-color:var(--orange);box-shadow:0 0 0 3px rgba(242,107,56,.16);}
.search-box input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.search-box input::placeholder{color:#9AA3A0;}
.search-ico{width:15px;height:15px;border:2px solid var(--muted);border-radius:50%;position:relative;flex-shrink:0;}
.search-ico::after{content:"";position:absolute;width:6px;height:2px;background:var(--muted);transform:rotate(45deg);right:-3px;bottom:-1px;border-radius:2px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:12px;font-weight:600;font-size:15.5px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-sm-x{min-height:42px;padding:0 16px;font-size:14.5px;border-radius:11px;}
.btn-primary-x{background:var(--orange);color:#fff;box-shadow:0 10px 22px rgba(242,107,56,.26);}
.btn-primary-x:hover{background:var(--orange-deep);color:#fff;transform:translateY(-2px);box-shadow:0 14px 26px rgba(242,107,56,.30);}
.btn-primary-x:active{transform:translateY(0);}
.btn-outline-x{border-color:var(--teal);color:var(--teal);background:transparent;}
.btn-outline-x:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.btn-outline-x:active{transform:translateY(0);}
.btn-ghost-x{border-color:var(--line);color:var(--ink);background:var(--white);}
.btn-ghost-x:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;border:1px solid var(--line);
  background:var(--white);color:var(--teal);font-size:20px;line-height:1;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange);}
.mobile-panel{display:none;border-top:1px solid var(--line);background:var(--paper);padding:16px 22px 22px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .search-box{width:100%;margin-bottom:14px;}
.mobile-links{display:flex;flex-direction:column;gap:2px;margin-bottom:16px;}
.mobile-links a{padding:12px 10px;border-radius:10px;font-weight:600;font-size:15px;}
.mobile-links a:hover{background:rgba(242,107,56,.09);color:var(--orange);}
.mobile-cta{display:flex;gap:10px;flex-wrap:wrap;}
.mobile-cta .btn{flex:1 1 130px;}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,#FBFAF6 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line);
  padding:64px 0 72px;
}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center right;
  opacity:.16;filter:saturate(.7);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(22,58,61,.16) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.35;
  mask-image:linear-gradient(100deg,transparent 40%,#000 100%);
  -webkit-mask-image:linear-gradient(100deg,transparent 40%,#000 100%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:start;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--orange);background:rgba(242,107,56,.10);border:1px solid rgba(242,107,56,.24);
  padding:6px 13px;border-radius:999px;margin-bottom:18px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 3px rgba(242,107,56,.18);}
.hero h1{
  font-size:clamp(2.1rem,4.2vw,3.4rem);line-height:1.24;margin-bottom:20px;letter-spacing:-.02em;
}
.hero h1 em{font-style:normal;color:var(--orange);}
.hero-lead{font-size:16.5px;color:#43514F;max-width:640px;margin-bottom:28px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.hero-note{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.hero-note a{color:var(--teal);font-weight:600;border-bottom:1px dashed var(--line);padding-bottom:1px;}
.hero-note a:hover{color:var(--orange);border-color:var(--orange);}

.quick-panel{background:var(--white);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow-lg);}
.quick-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.quick-head strong{font-size:15px;color:var(--teal);font-weight:800;}
.quick-head span{font-size:12.5px;color:var(--muted);}
.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.quick-card{
  display:flex;flex-direction:column;gap:6px;padding:14px 14px 13px;border-radius:var(--radius-sm);
  background:var(--paper);border:1px solid var(--line);transition:all .18s ease;
}
.quick-card:hover{border-color:var(--orange);background:#fff;transform:translateY(-2px);box-shadow:0 10px 22px rgba(14,31,33,.09);color:var(--ink);}
.quick-ico{
  width:30px;height:30px;border-radius:9px;background:rgba(22,58,61,.08);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
}
.quick-card:hover .quick-ico{background:rgba(242,107,56,.14);color:var(--orange);}
.quick-card b{font-size:14.5px;font-weight:700;color:var(--teal);line-height:1.4;}
.quick-card small{font-size:12.5px;color:var(--muted);line-height:1.55;}

/* ---------- section base ---------- */
.sect{padding:92px 0;}
.sect--alt{background:var(--paper-2);}
.sect--dark{background:var(--dark);color:#DCE6E3;}
.sect--dark h2,.sect--dark h3{color:#fff;}
.sect-head{max-width:780px;margin-bottom:42px;}
.sect-head h2{font-size:clamp(1.62rem,2.5vw,2.2rem);line-height:1.36;margin-bottom:14px;}
.sect-head p{font-size:15.5px;color:var(--muted);}
.sect--dark .sect-head p{color:#9CB0AC;}
.tag{
  display:inline-block;font-size:12.5px;font-weight:600;padding:4px 11px;border-radius:999px;
  background:rgba(44,199,165,.14);color:#186E5E;
}
.tag--orange{background:rgba(242,107,56,.13);color:#B94C1F;}
.tag--gray{background:rgba(22,58,61,.07);color:#4A5B59;}

/* ---------- stat board ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.stat-card{
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.10);
  border-radius:var(--radius);padding:22px 20px;position:relative;overflow:hidden;
  transition:border-color .18s ease,transform .18s ease,background-color .18s ease;
}
.stat-card::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:3px;background:var(--orange);
}
.stat-card:hover{border-color:rgba(242,107,56,.6);transform:translateY(-2px);background:rgba(255,255,255,.07);}
.stat-card .st-label{font-size:12.5px;letter-spacing:.1em;color:#7FA09A;font-weight:600;margin-bottom:8px;}
.stat-card .st-value{font-size:20px;font-weight:800;color:#fff;line-height:1.35;margin-bottom:6px;}
.stat-card .st-desc{font-size:13.5px;color:#9CB0AC;line-height:1.65;}
.stat-card .st-status{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--mint);margin-top:10px;}
.stat-card .st-status i{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block;}

/* ---------- matrix ---------- */
.matrix{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(150px,auto);gap:18px;}
.m-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);transition:all .18s ease;display:flex;flex-direction:column;gap:10px;
}
.m-card:hover{border-color:var(--orange);transform:translateY(-2px);box-shadow:0 16px 34px rgba(14,31,33,.12);}
.m-card--lg{grid-column:span 2;grid-row:span 2;background:linear-gradient(160deg,#163A3D 0%,#0E1F21 100%);border-color:transparent;color:#D6E2DF;justify-content:center;position:relative;overflow:hidden;}
.m-card--lg::after{
  content:"";position:absolute;right:-40px;bottom:-40px;width:220px;height:220px;border-radius:50%;
  border:1px dashed rgba(44,199,165,.35);
}
.m-card--lg h3{color:#fff;font-size:1.45rem;margin:6px 0 6px;}
.m-card--lg p{color:#9CB0AC;font-size:15px;max-width:440px;}
.m-card--lg .tag{background:rgba(44,199,165,.18);color:#6FE4CB;}
.m-ico{width:38px;height:38px;border-radius:11px;background:rgba(242,107,56,.12);color:var(--orange);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800;}
.m-card--lg .m-ico{background:rgba(242,107,56,.22);color:#FFA37A;}
.m-card h3{font-size:1.06rem;font-weight:700;line-height:1.5;}
.m-card p{font-size:14.5px;color:var(--muted);line-height:1.72;}
.m-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:6px;}

/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.compare-col{border-radius:var(--radius);padding:26px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);}
.compare-col--dim{background:#F1EDE5;box-shadow:none;}
.compare-col--bright{border-color:rgba(242,107,56,.42);}
.cc-head{display:flex;align-items:center;gap:10px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px dashed var(--line);}
.cc-head b{font-size:1.05rem;color:var(--teal);}
.cc-head .badge-x{font-size:12px;padding:3px 10px;border-radius:999px;background:rgba(242,107,56,.14);color:#B94C1F;font-weight:600;}
.compare-col--dim .badge-x{background:rgba(22,58,61,.09);color:#5C6B69;}
.cc-row{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid rgba(217,212,200,.55);}
.cc-row:last-child{border-bottom:0;}
.cc-key{flex:0 0 88px;font-size:13.5px;color:var(--muted);font-weight:600;}
.cc-val{font-size:14.5px;color:var(--ink);line-height:1.7;}

/* ---------- milestone ---------- */
.milestone{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative;}
.milestone::before{
  content:"";position:absolute;top:22px;left:6%;right:6%;height:2px;
  background:linear-gradient(90deg,rgba(242,107,56,.55),rgba(44,199,165,.45));
}
.ms-item{position:relative;padding-top:52px;}
.ms-dot{
  position:absolute;top:12px;left:0;width:22px;height:22px;border-radius:50%;
  background:var(--white);border:3px solid var(--orange);display:flex;align-items:center;justify-content:center;
  font-size:10px;color:var(--orange);font-weight:800;z-index:2;
}
.ms-item:nth-child(4) .ms-dot,.ms-item:nth-child(5) .ms-dot{border-color:var(--mint);color:#1E9E83;}
.ms-item h3{font-size:1.02rem;margin-bottom:6px;}
.ms-item p{font-size:14px;color:var(--muted);line-height:1.7;}
.ms-item .tag{margin-top:10px;}

/* ---------- range ---------- */
.range-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:24px;align-items:stretch;}
.range-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);}
.range-item{display:flex;gap:14px;padding:14px;border-radius:14px;border:1px solid var(--line);background:var(--paper);margin-bottom:12px;transition:all .18s ease;}
.range-item:last-child{margin-bottom:0;}
.range-item:hover{border-color:var(--orange);transform:translateX(2px);background:#fff;}
.range-item b{display:block;font-size:15px;color:var(--teal);margin-bottom:3px;}
.range-item small{font-size:13.5px;color:var(--muted);line-height:1.6;}
.range-ico{flex:0 0 34px;height:34px;border-radius:10px;background:rgba(22,58,61,.08);color:var(--teal);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;}
.range-map{background:var(--teal);border-radius:var(--radius);padding:26px;color:#CFDDDA;position:relative;overflow:hidden;}
.range-map::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:34px 34px;opacity:.9;
}
.range-map h3{color:#fff;font-size:1.1rem;margin-bottom:10px;position:relative;}
.range-map p{position:relative;font-size:14px;color:#9CB0AC;margin-bottom:18px;}
.chip-cloud{position:relative;display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  font-size:13.5px;font-weight:600;padding:8px 14px;border-radius:999px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);color:#E4EDEB;
  transition:all .18s ease;
}
.chip:hover{background:rgba(242,107,56,.22);border-color:rgba(242,107,56,.5);color:#fff;}
.chip--mint{border-color:rgba(44,199,165,.4);color:#7FE6D0;}

/* ---------- scene ---------- */
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.scene-card{
  display:flex;gap:16px;padding:22px;border-radius:var(--radius);background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow);transition:all .18s ease;
}
.scene-card:hover{border-color:var(--orange);transform:translateY(-2px);}
.scene-ico{
  flex:0 0 46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(242,107,56,.11);color:var(--orange);font-size:19px;font-weight:800;
}
.scene-card h3{font-size:1.02rem;margin-bottom:5px;}
.scene-card p{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:8px;}

/* ---------- checklist ---------- */
.check-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start;}
.check-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:12px 22px;box-shadow:var(--shadow);}
.check-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid rgba(217,212,200,.6);}
.check-item:last-child{border-bottom:0;}
.check-box{
  flex:0 0 22px;height:22px;border-radius:7px;border:2px solid var(--line);margin-top:3px;
  display:flex;align-items:center;justify-content:center;font-size:12px;color:transparent;font-weight:800;
  transition:all .18s ease;
}
.check-item:hover .check-box{border-color:var(--mint);background:rgba(44,199,165,.12);color:#1E9E83;}
.check-item b{display:block;font-size:15px;color:var(--teal);margin-bottom:3px;}
.check-item small{font-size:13.8px;color:var(--muted);line-height:1.65;}
.check-aside{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
}
.check-aside h3{font-size:1.05rem;margin-bottom:10px;}
.check-aside p{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:16px;}
.check-aside .btn{width:100%;}

/* ---------- download ---------- */
.dl-box{
  background:linear-gradient(150deg,#163A3D,#0E1F21);
  border-radius:26px;padding:44px;color:#D6E2DF;position:relative;overflow:hidden;
}
.dl-box::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(242,107,56,.30),transparent 68%);
}
.dl-head{position:relative;max-width:660px;margin-bottom:28px;}
.dl-head h2{color:#fff;font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:12px;}
.dl-head p{color:#9CB0AC;font-size:15px;}
.dl-grid{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.dl-card{
  display:flex;flex-direction:column;gap:6px;padding:20px;border-radius:var(--radius);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);
  transition:all .18s ease;
}
.dl-card:hover{background:rgba(242,107,56,.16);border-color:rgba(242,107,56,.55);transform:translateY(-3px);color:#fff;}
.dl-top{display:flex;align-items:center;gap:10px;margin-bottom:6px;}
.dl-ico{width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.10);display:flex;align-items:center;justify-content:center;font-size:15px;}
.dl-card b{font-size:15.5px;color:#fff;}
.dl-card small{font-size:12.8px;color:#9CB0AC;line-height:1.6;}
.dl-arrow{margin-top:auto;font-size:13px;color:var(--mint);font-weight:600;padding-top:10px;}

/* ---------- guard ---------- */
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.guard-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:all .18s ease;}
.guard-card:hover{border-color:var(--mint);transform:translateY(-2px);box-shadow:var(--shadow);}
.guard-ico{width:36px;height:36px;border-radius:11px;background:rgba(44,199,165,.13);color:#1E9E83;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:14px;}
.guard-card h3{font-size:1rem;margin-bottom:7px;}
.guard-card p{font-size:14px;color:var(--muted);line-height:1.72;}

/* ---------- quick answers ---------- */
.qanswer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.qcard{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--orange);
  border-radius:14px;padding:20px;transition:all .18s ease;
}
.qcard:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-left-color:var(--mint);}
.qcard b{display:block;font-size:14.8px;color:var(--teal);margin-bottom:7px;line-height:1.5;}
.qcard p{font-size:13.8px;color:var(--muted);line-height:1.7;}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;
  overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:rgba(242,107,56,.45);}
.faq-item[open]{border-color:var(--orange);box-shadow:var(--shadow);border-left:3px solid var(--orange);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 52px 18px 20px;position:relative;
  font-size:15.6px;font-weight:700;color:var(--teal);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:600;color:var(--orange);line-height:1;transition:transform .18s ease;
}
.faq-item[open] summary::after{content:"–";}
.faq-item .faq-body{padding:0 20px 20px;font-size:14.8px;color:#495856;line-height:1.82;}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.news-card{
  display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;transition:all .18s ease;box-shadow:var(--shadow);
}
.news-card:hover{border-color:var(--orange);transform:translateY(-2px);}
.news-thumb{
  flex:0 0 132px;height:96px;border-radius:12px;overflow:hidden;background:var(--paper-2);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.news-card:hover .news-thumb img{transform:scale(1.05);}
.news-body{min-width:0;display:flex;flex-direction:column;gap:6px;}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--muted);}
.news-body h3{font-size:15.5px;line-height:1.5;font-weight:700;}
.news-body h3 a:hover{color:var(--orange);}
.news-body p{font-size:13.6px;color:var(--muted);line-height:1.66;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-empty{
  grid-column:1 / -1;text-align:center;padding:44px 20px;background:#fff;
  border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);font-size:14.5px;
}
.news-more{display:flex;justify-content:center;margin-top:26px;}

/* ---------- topic ---------- */
.topic-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:24px;align-items:start;}
.topic-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.topic-tag{
  font-size:13.5px;font-weight:600;padding:8px 15px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--teal);transition:all .18s ease;
}
.topic-tag:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-2px);}
.topic-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:10px 22px;box-shadow:var(--shadow);}
.topic-row{display:flex;align-items:flex-start;gap:14px;padding:15px 0;border-bottom:1px solid rgba(217,212,200,.6);}
.topic-row:last-child{border-bottom:0;}
.topic-num{flex:0 0 26px;height:26px;border-radius:8px;background:rgba(22,58,61,.08);color:var(--teal);font-size:12.5px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-top:2px;}
.topic-row b{display:block;font-size:15px;color:var(--teal);margin-bottom:2px;}
.topic-row b a:hover{color:var(--orange);}
.topic-row small{font-size:13.4px;color:var(--muted);line-height:1.65;}

/* ---------- form ---------- */
.form-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start;}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-lg);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.8px;font-weight:600;color:var(--teal);margin-bottom:7px;}
.field label span{color:var(--orange);}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);background:var(--paper);border-radius:12px;
  padding:12px 14px;font-size:14.5px;color:var(--ink);outline:none;min-height:46px;
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.field input::placeholder,.field textarea::placeholder{color:#9AA3A0;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--orange);background:#fff;box-shadow:0 0 0 3px rgba(242,107,56,.16);
}
.field textarea{min-height:104px;resize:vertical;}
.form-tip{font-size:12.8px;color:var(--muted);margin-top:14px;line-height:1.7;}
.form-side{background:var(--teal);border-radius:var(--radius);padding:28px;color:#C8D8D5;}
.form-side h3{color:#fff;font-size:1.08rem;margin-bottom:12px;}
.form-side p{font-size:14px;color:#9CB0AC;line-height:1.78;margin-bottom:18px;}
.side-step{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.10);}
.side-step:last-of-type{border-bottom:0;}
.side-step i{
  flex:0 0 24px;height:24px;border-radius:8px;background:rgba(44,199,165,.18);color:#7FE6D0;
  font-style:normal;font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.side-step span{font-size:14px;color:#D3E0DD;line-height:1.6;}
.side-dl{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.side-dl a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;font-weight:600;
  padding:11px 14px;border-radius:11px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.13);color:#E3EDEB;transition:all .18s ease;
}
.side-dl a:hover{background:rgba(242,107,56,.20);border-color:rgba(242,107,56,.5);color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#9CB0AC;border-top:2px solid var(--orange);padding:60px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);}
.footer-brand b{color:#fff;font-size:15.5px;font-weight:800;}
.footer-about{font-size:13.8px;line-height:1.8;color:#8FA5A1;max-width:340px;}
.footer-col h4{color:#fff;font-size:14.5px;font-weight:700;margin-bottom:14px;letter-spacing:.02em;}
.footer-col a,.footer-col span{display:block;font-size:13.8px;color:#8FA5A1;padding:6px 0;transition:color .18s ease;}
.footer-col a:hover{color:var(--orange);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);padding:18px 0 22px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#7A8F8B;
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .nav-links{gap:0;}
  .nav-link{padding:10px 9px;font-size:14.4px;}
  .search-box{width:190px;}
  .hero-grid{gap:34px;}
  .guard-grid,.qanswer-grid{grid-template-columns:1fr 1fr;}
  .stat-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:991.98px){
  .nav-links,.nav-actions{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero{padding:48px 0 56px;}
  .sect{padding:68px 0;}
  .matrix{grid-template-columns:1fr 1fr;}
  .m-card--lg{grid-column:span 2;grid-row:span 1;}
  .compare-grid,.scene-grid,.range-grid,.check-wrap,.topic-grid,.form-grid,.news-grid{grid-template-columns:1fr;}
  .milestone{grid-template-columns:1fr 1fr;}
  .milestone::before{display:none;}
  .ms-item{padding-top:40px;}
  .dl-box{padding:30px;}
  .dl-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:575.98px){
  body{font-size:16px;}
  .container-x{padding:0 16px;}
  .hero h1{font-size:1.85rem;}
  .quick-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:1fr;}
  .matrix{grid-template-columns:1fr;}
  .m-card--lg{grid-column:span 1;}
  .guard-grid,.qanswer-grid,.milestone{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .news-card{flex-direction:column;}
  .news-thumb{flex:none;width:100%;height:150px;}
  .dl-box{padding:24px 18px;border-radius:20px;}
  .form-card{padding:22px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .sect{padding:56px 0;}
  .brand-text{font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --orange:#F26B38;
  --orange-deep:#DE5A28;
  --teal:#163A3D;
  --mint:#2CC7A5;
  --paper:#F6F4EF;
  --paper-2:#EFEBE2;
  --dark:#0E1F21;
  --ink:#25302F;
  --muted:#6F7774;
  --line:#D9D4C8;
  --white:#ffffff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 30px rgba(14,31,33,.08);
  --shadow-lg:0 20px 46px rgba(14,31,33,.14);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
html{scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font);background:var(--paper);color:var(--ink);
  font-size:16.5px;line-height:1.8;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--orange);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(242,107,56,.30);border-radius:8px;
}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 22px;}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:var(--paper);
  border-bottom:1px solid var(--line);box-shadow:0 2px 14px rgba(14,31,33,.05);
}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--teal);
  display:flex;align-items:center;justify-content:center;position:relative;flex-shrink:0;
}
.brand-mark::before{content:"";width:14px;height:14px;border-radius:50%;border:2px solid var(--mint);border-right-color:var(--orange);}
.brand-mark::after{content:"";position:absolute;inset:7px;border-radius:50%;border:1px solid rgba(255,255,255,.25);}
.brand-text{display:flex;flex-direction:column;line-height:1.25;font-weight:800;font-size:15.5px;color:var(--teal);}
.brand-sub{font-size:11.5px;font-weight:600;color:var(--orange);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px;}
.nav-link{position:relative;display:inline-block;padding:10px 12px;font-size:15px;font-weight:600;color:var(--ink);border-radius:10px;}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--orange);background:rgba(242,107,56,.07);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--orange);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;background:var(--white);border:1px solid var(--line);
  border-radius:999px;padding:0 14px;height:42px;width:228px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box:focus-within{border-color:var(--orange);box-shadow:0 0 0 3px rgba(242,107,56,.16);}
.search-box input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.search-box input::placeholder{color:#9AA3A0;}
.search-ico{width:15px;height:15px;border:2px solid var(--muted);border-radius:50%;position:relative;flex-shrink:0;}
.search-ico::after{content:"";position:absolute;width:6px;height:2px;background:var(--muted);transform:rotate(45deg);right:-3px;bottom:-1px;border-radius:2px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;
  border-radius:12px;font-weight:600;font-size:15.5px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-sm-x{min-height:42px;padding:0 16px;font-size:14.5px;border-radius:11px;}
.btn-primary-x{background:var(--orange);color:#fff;box-shadow:0 10px 22px rgba(242,107,56,.26);}
.btn-primary-x:hover{background:var(--orange-deep);color:#fff;transform:translateY(-2px);box-shadow:0 14px 26px rgba(242,107,56,.30);}
.btn-primary-x:active{transform:translateY(0);}
.btn-outline-x{border-color:var(--teal);color:var(--teal);background:transparent;}
.btn-outline-x:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.btn-outline-x:active{transform:translateY(0);}
.btn-ghost-x{border-color:var(--line);color:var(--ink);background:var(--white);}
.btn-ghost-x:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;border:1px solid var(--line);
  background:var(--white);color:var(--teal);font-size:20px;line-height:1;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange);}
.mobile-panel{display:none;border-top:1px solid var(--line);background:var(--paper);padding:16px 22px 22px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .search-box{width:100%;margin-bottom:14px;}
.mobile-links{display:flex;flex-direction:column;gap:2px;margin-bottom:16px;}
.mobile-links a{padding:12px 10px;border-radius:10px;font-weight:600;font-size:15px;}
.mobile-links a:hover{background:rgba(242,107,56,.09);color:var(--orange);}
.mobile-cta{display:flex;gap:10px;flex-wrap:wrap;}
.mobile-cta .btn{flex:1 1 130px;}
/* ---------- category head ---------- */
.cat-head{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#FBFAF6 0%,var(--paper) 100%);
  padding:48px 0 52px;
}
.cat-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(22,58,61,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.30;
  mask-image:linear-gradient(105deg,transparent 35%,#000 100%);
  -webkit-mask-image:linear-gradient(105deg,transparent 35%,#000 100%);
}
.cat-head-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:16px;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--orange);}
.crumbs span.sep{color:#BEB8AA;}
.tag-pill{
  display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:999px;
  font-size:13px;font-weight:600;background:rgba(242,107,56,.10);color:var(--orange-deep);
  border:1px solid rgba(242,107,56,.24);
}
.tag-pill.mint{background:rgba(44,199,165,.12);color:#1B8E75;border-color:rgba(44,199,165,.30);}
.tag-pill.grey{background:rgba(22,58,61,.06);color:var(--teal);border-color:rgba(22,58,61,.14);}
.cat-h1{
  font-size:clamp(1.9rem,3.2vw,2.9rem);font-weight:800;line-height:1.28;
  color:var(--teal);margin:14px 0 16px;letter-spacing:-.01em;
}
.cat-h1 em{font-style:normal;color:var(--orange);}
.cat-lead{font-size:16.5px;color:#42504E;max-width:660px;margin:0 0 22px;}
.cat-head-meta{display:flex;flex-wrap:wrap;gap:10px;}
.cat-figure{
  position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-lg);background:var(--white);margin:0;
}
.cat-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.cat-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;font-size:12.8px;color:#F2F0EA;
  background:linear-gradient(180deg,rgba(14,31,33,0) 0%,rgba(14,31,33,.82) 100%);
}
/* ---------- sections ---------- */
.sec{padding:78px 0;position:relative;}
.sec-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-dark{background:var(--dark);color:#E9E7E0;border-top:1px solid rgba(255,255,255,.06);}
.sec-head{max-width:760px;margin-bottom:38px;}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.8px;font-weight:700;letter-spacing:.12em;
  color:var(--orange);text-transform:uppercase;margin-bottom:12px;
}
.sec-kicker::before{content:"";width:22px;height:2px;background:var(--orange);border-radius:2px;}
.sec-title{font-size:clamp(1.5rem,2.4vw,2.1rem);font-weight:800;line-height:1.34;color:var(--teal);margin:0 0 12px;}
.sec-dark .sec-title{color:#F4F2EC;}
.sec-desc{margin:0;color:var(--muted);font-size:15.5px;}
.sec-dark .sec-desc{color:#A9B4B1;}
/* ---------- quick facts ---------- */
.fact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.fact-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 20px;
  box-shadow:var(--shadow);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.fact-card:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow-lg);}
.fact-top{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.fact-ico{
  width:36px;height:36px;border-radius:11px;background:rgba(22,58,61,.07);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0;
}
.fact-card h3{font-size:16.5px;font-weight:700;color:var(--teal);margin:0;}
.fact-card p{margin:0;font-size:14.5px;color:#4E5B59;line-height:1.75;}
.fact-card .fact-tag{margin-top:14px;display:inline-flex;}
/* ---------- article cards ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.post-card{
  display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.post-card:hover{transform:translateY(-3px);border-color:var(--orange);box-shadow:var(--shadow-lg);}
.post-thumb{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--paper-2);}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.post-cat{font-size:12.5px;font-weight:700;color:var(--orange);letter-spacing:.04em;margin-bottom:8px;}
.post-card h3{font-size:17px;font-weight:700;line-height:1.5;color:var(--teal);margin:0 0 8px;}
.post-card h3 a:hover{color:var(--orange);}
.post-card .excerpt{font-size:14.2px;color:#4E5B59;margin:0 0 14px;line-height:1.72;}
.post-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.8px;color:var(--muted);padding-top:12px;border-top:1px dashed var(--line);
}
.post-meta i{font-size:13px;}
.post-list-row{
  display:grid;grid-template-columns:210px 1fr;gap:20px;background:var(--white);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);transition:transform .18s ease,border-color .18s ease;
}
.post-list-row:hover{transform:translateY(-2px);border-color:var(--orange);}
.post-list-row .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--paper-2);}
.post-list-row .thumb img{width:100%;height:100%;object-fit:cover;}
.post-list-row .body{padding:18px 20px 18px 0;display:flex;flex-direction:column;gap:6px;}
.more-row{margin-top:30px;display:flex;justify-content:center;}
.empty-note{
  background:var(--white);border:1px dashed var(--line);border-radius:var(--radius);
  padding:38px 24px;text-align:center;color:var(--muted);font-size:15px;
}
/* ---------- path steps ---------- */
.path-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
.path-step{
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-sm);padding:18px 16px;position:relative;
}
.path-step .num{
  display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;
  border-radius:9px;background:var(--orange);color:#fff;font-weight:700;font-size:13.5px;margin-bottom:10px;
}
.path-step h3{font-size:15.5px;color:#F4F2EC;margin:0 0 6px;font-weight:700;}
.path-step p{margin:0;font-size:13.6px;color:#A9B4B1;line-height:1.7;}
/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.compare-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);
}
.compare-card.accent{border-color:rgba(242,107,56,.45);box-shadow:0 16px 34px rgba(242,107,56,.14);}
.compare-card h3{margin:0 0 6px;font-size:19px;font-weight:800;color:var(--teal);display:flex;align-items:center;gap:9px;}
.compare-card .sub{font-size:13.8px;color:var(--muted);margin:0 0 18px;}
.compare-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:13px;}
.compare-list li{display:flex;gap:11px;font-size:14.6px;color:#3C4948;line-height:1.72;}
.compare-list i{flex-shrink:0;margin-top:4px;font-size:14px;color:var(--mint);}
.compare-card.accent .compare-list i{color:var(--orange);}
.compare-list b{color:var(--teal);font-weight:700;}
/* ---------- glossary ---------- */
.gloss-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.gloss-card{
  background:var(--white);border:1px solid var(--line);border-left:3px solid var(--mint);
  border-radius:var(--radius-sm);padding:20px 22px;transition:border-color .18s ease,transform .18s ease;
}
.gloss-card:hover{border-left-color:var(--orange);transform:translateY(-2px);}
.gloss-card h3{font-size:16.5px;font-weight:800;color:var(--teal);margin:0 0 8px;}
.gloss-card p{margin:0;font-size:14.4px;color:#4E5B59;line-height:1.76;}
/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  margin-bottom:12px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:rgba(242,107,56,.45);}
.faq-item[open]{border-color:var(--orange);box-shadow:0 10px 24px rgba(242,107,56,.10);border-left:4px solid var(--orange);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:17px 20px;font-weight:700;font-size:16px;color:var(--teal);
  display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:600;color:var(--orange);flex-shrink:0;line-height:1;
  transition:transform .18s ease;
}
.faq-item[open] summary::after{content:"−";}
.faq-item .faq-body{padding:0 20px 18px;font-size:14.8px;color:#4E5B59;line-height:1.8;}
/* ---------- download ---------- */
.dl-bar{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;
}
.dl-btn{
  display:flex;align-items:center;gap:14px;background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px 18px;min-height:76px;
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.dl-btn:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow);color:inherit;}
.dl-btn .dl-ico{
  width:42px;height:42px;border-radius:12px;background:rgba(22,58,61,.07);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;
}
.dl-btn b{display:block;font-size:15.5px;font-weight:700;color:var(--teal);}
.dl-btn small{display:block;font-size:12.6px;color:var(--muted);margin-top:2px;}
/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.rel-item{
  display:block;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;font-size:14.6px;font-weight:600;color:var(--teal);
  transition:border-color .18s ease,transform .18s ease,color .18s ease;
}
.rel-item:hover{border-color:var(--orange);transform:translateY(-2px);color:var(--orange);}
.rel-item span{display:block;font-size:12.6px;color:var(--muted);font-weight:400;margin-top:4px;}
/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#C9D1CE;border-top:3px solid var(--orange);padding:58px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand b{color:#F4F2EC;font-size:15.5px;font-weight:800;}
.footer-about{font-size:14px;line-height:1.8;color:#9FAAA7;margin:0;max-width:380px;}
.footer-col h4{font-size:14px;color:#F4F2EC;font-weight:700;margin:0 0 14px;letter-spacing:.04em;}
.footer-col a{display:block;font-size:14px;color:#9FAAA7;padding:5px 0;}
.footer-col a:hover{color:var(--orange);}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8A9592;
}
/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .search-box{width:190px;}
  .nav-link{padding:10px 9px;font-size:14.4px;}
  .fact-grid{grid-template-columns:repeat(2,1fr);}
  .rel-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .nav-links,.nav-actions .search-box,.nav-actions .btn-outline-x{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-actions{margin-left:auto;}
  .nav-actions .btn-primary-x{padding:0 16px;min-height:42px;font-size:14.5px;}
  .cat-head-inner{grid-template-columns:1fr;gap:28px;}
  .cat-figure{max-width:520px;}
  .sec{padding:62px 0;}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .path-strip{grid-template-columns:repeat(2,1fr);}
  .compare-grid{grid-template-columns:1fr;}
  .gloss-grid{grid-template-columns:1fr;}
  .dl-bar{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .footer-about{max-width:none;}
  .post-list-row{grid-template-columns:170px 1fr;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .cat-head{padding:34px 0 40px;}
  .cat-lead{font-size:15.4px;}
  .sec{padding:52px 0;}
  .sec-head{margin-bottom:26px;}
  .fact-grid{grid-template-columns:1fr;}
  .post-grid{grid-template-columns:1fr;}
  .path-strip{grid-template-columns:1fr;}
  .rel-grid{grid-template-columns:1fr;}
  .post-list-row{grid-template-columns:1fr;}
  .post-list-row .thumb{aspect-ratio:16/9;}
  .post-list-row .body{padding:0 18px 18px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .cat-h1{font-size:clamp(1.6rem,6vw,2.1rem);}
  .compare-card{padding:22px 18px;}
}
@media (max-width:575.98px){
  .container-x{padding:0 16px;}
  .brand-text{font-size:14px;}
  .brand-sub{font-size:10.5px;letter-spacing:.10em;}
  .footer-grid{grid-template-columns:1fr;}
  .cat-head-meta{gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --orange:#F26B38;
  --orange-deep:#DE5A28;
  --teal:#163A3D;
  --mint:#2CC7A5;
  --paper:#F6F4EF;
  --paper-2:#EFEBE2;
  --dark:#0E1F21;
  --ink:#25302F;
  --muted:#6F7774;
  --line:#D9D4C8;
  --white:#ffffff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 30px rgba(14,31,33,.08);
  --shadow-lg:0 20px 46px rgba(14,31,33,.14);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  background:var(--paper);
  color:var(--ink);
  font-size:16.5px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease,transform .18s ease,box-shadow .18s ease;}
a:hover{color:var(--orange);}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(242,107,56,.30);border-radius:8px;
}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 22px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 14px rgba(14,31,33,.05);
}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;background:var(--teal);
  display:flex;align-items:center;justify-content:center;position:relative;flex-shrink:0;
}
.brand-mark::before{
  content:"";width:14px;height:14px;border-radius:50%;
  border:2px solid var(--mint);border-right-color:var(--orange);
}
.brand-mark::after{
  content:"";position:absolute;inset:7px;border-radius:50%;
  border:1px solid rgba(255,255,255,.25);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;font-weight:800;font-size:15.5px;color:var(--teal);}
.brand-sub{font-size:11.5px;font-weight:600;color:var(--orange);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;font-size:15px;font-weight:600;
  color:var(--ink);border-radius:10px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--orange);background:rgba(242,107,56,.07);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--orange);}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;background:var(--white);
  border:1px solid var(--line);border-radius:999px;padding:0 14px;height:42px;width:228px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box:focus-within{border-color:var(--orange);box-shadow:0 0 0 3px rgba(242,107,56,.16);}
.search-box input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.search-box input::placeholder{color:#9AA3A0;}
.search-ico{width:15px;height:15px;border:2px solid var(--muted);border-radius:50%;position:relative;flex-shrink:0;}
.search-ico::after{content:"";position:absolute;width:6px;height:2px;background:var(--muted);transform:rotate(45deg);right:-3px;bottom:-1px;border-radius:2px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:12px;font-weight:600;font-size:15.5px;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-sm-x{min-height:42px;padding:0 16px;font-size:14.5px;border-radius:11px;}
.btn-primary-x{background:var(--orange);color:#fff;box-shadow:0 10px 22px rgba(242,107,56,.26);}
.btn-primary-x:hover{background:var(--orange-deep);color:#fff;transform:translateY(-2px);box-shadow:0 14px 26px rgba(242,107,56,.30);}
.btn-primary-x:active{transform:translateY(0);}
.btn-outline-x{border-color:var(--teal);color:var(--teal);background:transparent;}
.btn-outline-x:hover{background:var(--teal);color:#fff;transform:translateY(-1px);}
.btn-ghost-x{border-color:var(--line);color:var(--ink);background:var(--white);}
.btn-ghost-x:hover{border-color:var(--orange);color:var(--orange);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:12px;border:1px solid var(--line);
  background:var(--white);color:var(--teal);font-size:20px;line-height:1;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--orange);color:var(--orange);}
.mobile-panel{display:none;border-top:1px solid var(--line);background:var(--paper);padding:16px 22px 22px;}
.mobile-panel.is-open{display:block;}
.mobile-panel .search-box{width:100%;margin-bottom:14px;}
.mobile-links{display:flex;flex-direction:column;gap:2px;margin-bottom:16px;}
.mobile-links a{padding:12px 10px;border-radius:10px;font-weight:600;font-size:15px;}
.mobile-links a:hover{background:rgba(242,107,56,.09);color:var(--orange);}
.mobile-cta{display:flex;gap:10px;flex-wrap:wrap;}
.mobile-cta .btn{flex:1 1 130px;}

/* ---------- page head ---------- */
.page-head{
  position:relative;overflow:hidden;
  padding:30px 0 46px;
  background:linear-gradient(180deg,#FBFAF6 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(22,58,61,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.34;
  mask-image:linear-gradient(100deg,transparent 45%,#000 100%);
  -webkit-mask-image:linear-gradient(100deg,transparent 45%,#000 100%);
}
.page-head-inner{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:18px;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--orange);}
.crumbs .sep{color:#B9B4A7;}
.crumbs .current{color:var(--ink);font-weight:600;}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;line-height:1.6;
}
.tag-orange{background:rgba(242,107,56,.12);color:var(--orange-deep);border:1px solid rgba(242,107,56,.26);}
.tag-mint{background:rgba(44,199,165,.14);color:#12806A;border:1px solid rgba(44,199,165,.32);}
.tag-soft{background:var(--paper-2);color:var(--muted);border:1px solid var(--line);}
.article-title{
  font-size:clamp(1.72rem,3.1vw,2.55rem);
  line-height:1.34;font-weight:800;color:var(--teal);
  margin:0 0 16px;letter-spacing:-.01em;word-break:break-word;
}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--muted);}
.meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-dot{width:7px;height:7px;border-radius:50%;background:var(--mint);flex-shrink:0;}

/* ---------- article layout ---------- */
.article-section{padding:52px 0 16px;}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:34px;align-items:start;}
.article-main{min-width:0;}
.article-cover{
  margin:0 0 22px;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);background:var(--paper-2);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.article-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:36px 40px;overflow:hidden;
}
.article-body{font-size:17px;line-height:1.9;color:var(--ink);word-break:break-word;}
.article-body>*:first-child{margin-top:0;}
.article-body p{margin:0 0 18px;}
.article-body h2{
  position:relative;font-size:clamp(1.28rem,1.9vw,1.58rem);color:var(--teal);
  font-weight:800;line-height:1.45;margin:34px 0 14px;padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:4px;border-radius:3px;background:var(--orange);
}
.article-body h3{font-size:1.14rem;color:var(--teal);font-weight:700;margin:26px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;}
.article-body li{margin:0 0 8px;}
.article-body li::marker{color:var(--orange);}
.article-body a{color:var(--orange-deep);border-bottom:1px solid rgba(242,107,56,.35);}
.article-body a:hover{color:var(--orange);border-bottom-color:var(--orange);}
.article-body img{border-radius:14px;margin:20px auto;}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;border-left:4px solid var(--mint);
  background:rgba(44,199,165,.09);border-radius:0 14px 14px 0;color:#1F4B45;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body table{
  display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;
  margin:20px 0;font-size:15.5px;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left;min-width:120px;}
.article-body th{background:var(--paper-2);color:var(--teal);font-weight:700;}
.article-body pre{background:var(--dark);color:#DDE7E5;padding:16px 18px;border-radius:14px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-body code{background:rgba(22,58,61,.07);padding:2px 6px;border-radius:6px;font-size:.92em;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:30px 0;}
.article-empty{text-align:center;padding:34px 8px 26px;}
.article-empty h2{font-size:1.4rem;color:var(--teal);margin:0 0 12px;padding-left:0;}
.article-empty h2::before{display:none;}
.article-empty p{color:var(--muted);font-size:15.5px;margin:0 auto 22px;max-width:52ch;}

/* ---------- sidebar ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;}
@media (min-width:992px){
  .article-side{position:sticky;top:92px;align-self:start;}
}
.side-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px 22px;
}
.side-card h2,.side-card h3{
  display:flex;align-items:center;gap:9px;
  font-size:1.02rem;color:var(--teal);font-weight:800;margin:0 0 14px;line-height:1.5;
}
.side-card h2::before,.side-card h3::before{
  content:"";width:8px;height:8px;border-radius:50%;background:var(--orange);flex-shrink:0;
}
.point-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px;}
.point-list li{display:flex;gap:10px;font-size:14.4px;line-height:1.72;color:var(--ink);}
.point-num{
  flex-shrink:0;width:22px;height:22px;border-radius:7px;background:rgba(242,107,56,.13);
  color:var(--orange-deep);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-top:3px;
}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.mini-flow{list-style:none;margin:0;padding:0;}
.mini-flow li{position:relative;padding:0 0 16px 20px;font-size:13.5px;color:var(--muted);line-height:1.65;}
.mini-flow li:last-child{padding-bottom:0;}
.mini-flow li::before{
  content:"";position:absolute;left:0;top:7px;width:8px;height:8px;border-radius:50%;
  background:var(--orange);box-shadow:0 0 0 3px rgba(242,107,56,.14);
}
.mini-flow li::after{content:"";position:absolute;left:3.5px;top:19px;bottom:2px;width:1px;background:var(--line);}
.mini-flow li:last-child::after{display:none;}
.mini-flow strong{display:block;color:var(--teal);font-size:14.5px;font-weight:700;margin-bottom:2px;}
.side-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:14px;font-weight:600;color:var(--orange-deep);
}
.side-link:hover{color:var(--orange);gap:9px;}
.side-dl{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;}
.side-dl a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:11px;border:1px solid var(--line);
  background:var(--paper);font-size:14.2px;font-weight:600;color:var(--teal);
}
.side-dl a:hover{border-color:var(--orange);color:var(--orange);background:rgba(242,107,56,.07);}
.side-dl .arw{color:var(--muted);font-size:13px;}
.side-dl a:hover .arw{color:var(--orange);}

/* ---------- band shared ---------- */
.band{padding:70px 0 0;}
.band-head{margin-bottom:30px;max-width:760px;}
.band-eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.14em;
  color:var(--orange);margin-bottom:10px;
}
.band-head h2{
  font-size:clamp(1.45rem,2.3vw,2rem);color:var(--teal);font-weight:800;
  margin:0 0 10px;line-height:1.4;
}
.band-head p{margin:0;color:var(--muted);font-size:15.5px;line-height:1.8;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;}
.step{
  background:var(--white);border:1px solid var(--line);border-radius:16px;padding:20px 18px;
  box-shadow:0 8px 20px rgba(14,31,33,.05);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.step:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow);}
.step-no{display:block;font-size:12.5px;font-weight:700;color:var(--orange);letter-spacing:.1em;}
.step h3{font-size:15.5px;margin:6px 0 6px;color:var(--teal);font-weight:800;line-height:1.5;}
.step p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.68;}

/* ---------- related ---------- */
.related-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.related-item{
  display:block;background:var(--white);border:1px solid var(--line);border-radius:16px;
  padding:20px 20px 18px;box-shadow:0 8px 20px rgba(14,31,33,.05);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.related-item:hover{transform:translateY(-2px);border-color:var(--orange);box-shadow:var(--shadow);color:inherit;}
.related-item h3{font-size:15.6px;color:var(--teal);font-weight:700;margin:0 0 10px;line-height:1.55;}
.related-item:hover h3{color:var(--orange-deep);}
.related-meta{display:flex;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--muted);}
.related-note{
  border:1px dashed var(--line);border-radius:16px;background:rgba(255,255,255,.7);
  padding:22px;font-size:14.5px;color:var(--muted);
}

/* ---------- download ---------- */
.download-band{padding:70px 0 0;}
.download-panel{
  position:relative;overflow:hidden;
  background:var(--dark);border-radius:24px;padding:38px 40px;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:30px;align-items:center;
  box-shadow:var(--shadow-lg);
}
.download-panel::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(44,199,165,.28) 1px,transparent 1px);
  background-size:20px 20px;opacity:.5;
  mask-image:linear-gradient(100deg,transparent 40%,#000 100%);
  -webkit-mask-image:linear-gradient(100deg,transparent 40%,#000 100%);
}
.download-copy{position:relative;z-index:2;}
.download-copy h2{color:#fff;font-size:clamp(1.3rem,2.1vw,1.7rem);font-weight:800;margin:0 0 10px;line-height:1.42;}
.download-copy p{margin:0;color:#A9BDBA;font-size:14.6px;line-height:1.8;max-width:54ch;}
.dl-actions{position:relative;z-index:2;display:flex;gap:12px;flex-wrap:wrap;}
.dl-btn{
  display:inline-flex;align-items:center;gap:9px;min-height:48px;padding:0 20px;
  border-radius:12px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.20);
  color:#fff;font-weight:600;font-size:14.5px;
  transition:background-color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.dl-btn:hover{background:var(--orange);border-color:var(--orange);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(242,107,56,.28);}
.dl-btn:active{transform:translateY(0);}
.dl-ico{width:16px;height:16px;border-radius:4px;background:var(--mint);flex-shrink:0;opacity:.9;}

/* ---------- back ---------- */
.back-band{padding:44px 0 84px;}
.back-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#B9C8C5;border-top:3px solid var(--orange);padding:56px 0 26px;margin-top:10px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:15.5px;font-weight:800;margin-bottom:14px;}
.footer-about{margin:0;font-size:14px;line-height:1.85;color:#98ABA8;max-width:40ch;}
.footer-col h4{color:#fff;font-size:14.5px;font-weight:700;margin:0 0 14px;letter-spacing:.04em;}
.footer-col a{display:block;font-size:14px;color:#9FB2AF;padding:5px 0;transition:color .18s ease,transform .18s ease;}
.footer-col a:hover{color:var(--orange);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;color:#7F9391;
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-shell{grid-template-columns:minmax(0,1fr) 300px;gap:26px;}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:991px){
  .nav-links{display:none;}
  .nav-actions .search-box{display:none;}
  .nav-toggle{display:inline-flex;}
  .article-shell{grid-template-columns:minmax(0,1fr);}
  .article-side{position:static;}
  .article-card{padding:30px 26px;}
  .related-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .download-panel{grid-template-columns:minmax(0,1fr);padding:30px 26px;}
  .band{padding:56px 0 0;}
  .back-band{padding:36px 0 68px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container-x{padding:0 16px;}
  .article-section{padding:34px 0 12px;}
  .article-card{padding:24px 18px;border-radius:14px;}
  .article-cover{border-radius:14px;}
  .article-body{font-size:16.2px;line-height:1.82;}
  .steps{grid-template-columns:1fr;}
  .related-list{grid-template-columns:1fr;}
  .page-head{padding:22px 0 34px;}
  .head-tags{gap:6px;}
  .dl-actions{width:100%;}
  .dl-btn{flex:1 1 100%;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .back-row .btn{flex:1 1 140px;}
}
@media (max-width:575px){
  .brand-text{font-size:14px;}
  .brand-sub{display:none;}
  .nav-wrap{min-height:64px;gap:10px;}
  .side-card{padding:20px 18px;}
  .article-title{font-size:1.55rem;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}