:root{
  --brand:#B71C1C;
  --brand-dark:#8E1414;
  --brand-light:#D84040;
  --accent:#FFC107;
  --accent-soft:#FFE082;
  --bg:#FBF7F2;
  --bg-alt:#F3EBE1;
  --surface:#FFFFFF;
  --surface-alt:#FFF9F0;
  --glass:rgba(255,255,255,.62);
  --glass-border:rgba(255,255,255,.55);
  --text:#241A16;
  --text-soft:#5C4A42;
  --text-muted:#8A756C;
  --border:rgba(183,28,28,.14);
  --shadow-sm:0 2px 8px rgba(80,30,20,.06);
  --shadow-md:0 8px 24px rgba(80,30,20,.10);
  --shadow-lg:0 18px 48px rgba(80,30,20,.16);
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-xl:32px;
  --header-h:68px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --grad-brand:linear-gradient(135deg,#B71C1C 0%,#D84040 45%,#FF8F3C 100%);
  --grad-hero:linear-gradient(135deg,#8E1414 0%,#B71C1C 38%,#E4572E 72%,#FFC107 100%);
  --grad-accent:linear-gradient(135deg,#FFC107 0%,#FF8F3C 100%);
}

html[data-theme="dark"],
html.dark{
  --bg:#161010;
  --bg-alt:#1E1515;
  --surface:#211818;
  --surface-alt:#2A1E1E;
  --glass:rgba(40,28,28,.62);
  --glass-border:rgba(255,255,255,.10);
  --text:#F6ECE6;
  --text-soft:#D8C4BC;
  --text-muted:#A08C84;
  --border:rgba(255,193,7,.16);
  --shadow-sm:0 2px 8px rgba(0,0,0,.35);
  --shadow-md:0 8px 24px rgba(0,0,0,.45);
  --shadow-lg:0 18px 48px rgba(0,0,0,.55);
  --grad-brand:linear-gradient(135deg,#7A1010 0%,#B71C1C 50%,#E4572E 100%);
}

@media (prefers-color-scheme:dark){
  html:not([data-theme="light"]){
    --bg:#161010;
    --bg-alt:#1E1515;
    --surface:#211818;
    --surface-alt:#2A1E1E;
    --glass:rgba(40,28,28,.62);
    --glass-border:rgba(255,255,255,.10);
    --text:#F6ECE6;
    --text-soft:#D8C4BC;
    --text-muted:#A08C84;
    --border:rgba(255,193,7,.16);
    --shadow-sm:0 2px 8px rgba(0,0,0,.35);
    --shadow-md:0 8px 24px rgba(0,0,0,.45);
    --shadow-lg:0 18px 48px rgba(0,0,0,.55);
    --grad-brand:linear-gradient(135deg,#7A1010 0%,#B71C1C 50%,#E4572E 100%);
  }
}

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

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  background-image:
    radial-gradient(900px 500px at 8% -8%,rgba(255,193,7,.14),transparent 60%),
    radial-gradient(800px 480px at 100% 0%,rgba(183,28,28,.12),transparent 60%);
  background-attachment:fixed;
  transition:background-color .35s var(--ease),color .35s var(--ease);
  overflow-x:hidden;
}

img,svg{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .25s var(--ease);}
a:hover{color:var(--brand-light);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit;}

::selection{background:var(--accent);color:#3A1A00;}

:focus-visible{
  outline:3px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}

/* ============ Header ============ */
#site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  backdrop-filter:blur(16px) saturate(160%);
  border-bottom:1px solid var(--glass-border);
  box-shadow:var(--shadow-sm);
  transition:background .35s var(--ease),box-shadow .35s var(--ease);
}

.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px;
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:18px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

.brand svg{
  border-radius:12px;
  box-shadow:0 4px 12px rgba(183,28,28,.28);
  transition:transform .4s var(--ease);
}
.brand:hover svg{transform:rotate(-6deg) scale(1.06);}

.brand-name{
  font-size:1.16rem;
  font-weight:800;
  letter-spacing:.5px;
  background:var(--grad-brand);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  white-space:nowrap;
}

#main-nav{
  margin-left:auto;
  flex:1 1 auto;
  min-width:0;
}

#main-nav ul{
  display:flex;
  align-items:center;
  gap:2px;
  justify-content:flex-end;
  flex-wrap:nowrap;
}

#main-nav a{
  display:block;
  padding:8px 12px;
  font-size:.92rem;
  font-weight:600;
  color:var(--text-soft);
  border-radius:999px;
  white-space:nowrap;
  position:relative;
  transition:color .25s var(--ease),background .25s var(--ease);
}

#main-nav a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:3px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--grad-accent);
  transform:translateX(-50%);
  transition:width .3s var(--ease);
}

#main-nav a:hover{
  color:var(--brand);
  background:rgba(255,193,7,.14);
}
#main-nav a:hover::after{width:60%;}

#menu-toggle,
#theme-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  flex-shrink:0;
  font-size:1.12rem;
  border-radius:12px;
  background:var(--surface);
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease);
}

#menu-toggle:hover,
#theme-toggle:hover{
  transform:translateY(-2px) scale(1.05);
  background:var(--accent-soft);
  box-shadow:var(--shadow-md);
}

#menu-toggle{display:none;}

/* ============ Main layout ============ */
main{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px 40px;
}

section{
  margin:48px 0;
  scroll-margin-top:calc(var(--header-h) + 20px);
}

h1,h2,h3,h4{
  line-height:1.35;
  color:var(--text);
  letter-spacing:.2px;
}

h1{
  font-size:clamp(1.6rem,3.4vw,2.5rem);
  font-weight:900;
  margin:0 0 18px;
  background:var(--grad-brand);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

h2{
  font-size:clamp(1.3rem,2.4vw,1.85rem);
  font-weight:800;
  margin:0 0 18px;
  padding-left:16px;
  position:relative;
}

h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.18em;
  width:6px;
  border-radius:6px;
  background:var(--grad-accent);
  box-shadow:0 0 14px rgba(255,193,7,.5);
}

h3{
  font-size:clamp(1.06rem,1.8vw,1.28rem);
  font-weight:700;
  margin:28px 0 12px;
  color:var(--brand);
}

html[data-theme="dark"] h3,
html.dark h3{color:var(--accent);}

p{
  margin:0 0 16px;
  color:var(--text-soft);
}

strong{color:var(--text);font-weight:700;}

/* ============ Breadcrumb ============ */
#breadcrumb{
  margin:20px 0 8px;
  font-size:.86rem;
}

#breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:10px 16px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--glass-border);
  border-radius:999px;
  box-shadow:var(--shadow-sm);
  width:fit-content;
  max-width:100%;
}

#breadcrumb li{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--text-muted);
}

#breadcrumb li+li::before{
  content:"›";
  color:var(--text-muted);
  opacity:.6;
}

#breadcrumb a{color:var(--text-soft);font-weight:600;}
#breadcrumb a:hover{color:var(--brand);}
#breadcrumb li[aria-current="page"]{color:var(--brand);font-weight:700;}

/* ============ Hero ============ */
#hero{
  position:relative;
  margin:28px 0 56px;
  padding:clamp(24px,4vw,48px);
  border-radius:var(--radius-xl);
  background:var(--grad-hero);
  background-size:200% 200%;
  animation:heroShift 16s ease-in-out infinite;
  color:#fff;
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  isolation:isolate;
}

#hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(420px 220px at 88% 12%,rgba(255,255,255,.28),transparent 70%),
    radial-gradient(360px 200px at 6% 92%,rgba(255,193,7,.32),transparent 70%);
  z-index:-1;
  pointer-events:none;
}

#hero::after{
  content:"";
  position:absolute;
  width:280px;
  height:280px;
  right:-80px;
  bottom:-120px;
  border-radius:50%;
  border:2px dashed rgba(255,255,255,.22);
  z-index:-1;
  pointer-events:none;
}

@keyframes heroShift{
  0%,100%{background-position:0% 50%;}
  50%{background-position:100% 50%;}
}

#hero h1{
  color:#fff;
  -webkit-text-fill-color:#fff;
  background:none;
  text-shadow:0 2px 18px rgba(0,0,0,.22);
}

.hero-lead{
  color:rgba(255,255,255,.94);
  font-size:clamp(.96rem,1.6vw,1.08rem);
  max-width:78ch;
  margin-bottom:28px;
}

/* ============ Carousel ============ */
.hero-carousel{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:18px;
  margin:8px 0 28px;
}

.slide{
  background:rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid rgba(255,255,255,.28);
  border-radius:var(--radius-lg);
  padding:12px;
  overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),background .4s var(--ease);
  box-shadow:0 8px 24px rgba(0,0,0,.14);
}

.slide:hover{
  transform:translateY(-6px);
  background:rgba(255,255,255,.22);
  box-shadow:0 20px 44px rgba(0,0,0,.28);
}

.slide svg{
  border-radius:var(--radius-md);
  width:100%;
  transition:transform .5s var(--ease);
}
.slide:hover svg{transform:scale(1.03);}

.slide p{
  margin:12px 4px 4px;
  color:rgba(255,255,255,.95);
  font-size:.9rem;
  line-height:1.6;
}

/* ============ Stats ============ */
.hero-stats{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(130px,1fr));
  gap:14px;
  margin-top:8px;
}

.stat{
  text-align:center;
  padding:16px 10px;
  border-radius:var(--radius-md);
  background:rgba(255,255,255,.16);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.26);
  transition:transform .35s var(--ease),background .35s var(--ease);
}

.stat:hover{
  transform:translateY(-4px);
  background:rgba(255,255,255,.26);
}

.stat .num{
  display:block;
  font-size:clamp(1.5rem,3vw,2rem);
  font-weight:900;
  color:var(--accent);
  line-height:1.2;
  text-shadow:0 2px 10px rgba(0,0,0,.2);
}

.stat span:last-child{
  display:block;
  font-size:.82rem;
  color:rgba(255,255,255,.9);
  margin-top:4px;
}

/* ============ Generic card sections ============ */
#intro,
#products,
#solutions,
#cases,
#articles,
#howto,
#faq,
#notes,
#contact,
#sitemap,
#privacy,
#disclaimer{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:clamp(20px,3.4vw,40px);
  box-shadow:var(--shadow-sm);
  transition:box-shadow .35s var(--ease),transform .35s var(--ease),background .35s var(--ease);
}

#intro:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#articles:hover,
#howto:hover,
#faq:hover,
#notes:hover,
#contact:hover,
#sitemap:hover,
#privacy:hover,
#disclaimer:hover{
  box-shadow:var(--shadow-md);
}

/* ============ Articles ============ */
#articles article{
  position:relative;
  padding:20px 22px;
  margin:0 0 16px;
  border-radius:var(--radius-md);
  background:var(--surface-alt);
  border:1px solid var(--border);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}

#articles article::before{
  content:"";
  position:absolute;
  left:0;
  top:18px;
  bottom:18px;
  width:4px;
  border-radius:4px;
  background:var(--grad-accent);
  opacity:0;
  transition:opacity .35s var(--ease);
}

#articles article:hover{
  transform:translateX(6px);
  box-shadow:var(--shadow-md);
  border-color:rgba(255,193,7,.5);
}

#articles article:hover::before{opacity:1;}

#articles article h3{margin-top:0;}

#articles .meta{
  font-size:.82rem;
  color:var(--text-muted);
  margin-bottom:10px;
  letter-spacing:.2px;
}

#articles article a{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:700;
  font-size:.9rem;
  padding:6px 16px;
  border-radius:999px;
  background:var(--grad-accent);
  color:#3A1A00;
  box-shadow:0 4px 14px rgba(255,143,60,.32);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}

#articles article a::after{content:"→";transition:transform .3s var(--ease);}

#articles article a:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 22px rgba(255,143,60,.45);
  filter:brightness(1.04);
  color:#3A1A00;
}
#articles article a:hover::after{transform:translateX(4px);}

/* ============ FAQ ============ */
#faq details{
  margin:0 0 12px;
  border-radius:var(--radius-md);
  background:var(--surface-alt);
  border:1px solid var(--border);
  overflow:hidden;
  transition:box-shadow .35s var(--ease),border-color .35s var(--ease);
}

#faq details[open]{
  box-shadow:var(--shadow-md);
  border-color:rgba(255,193,7,.55);
}

#faq summary{
  position:relative;
  padding:16px 52px 16px 20px;
  font-weight:700;
  color:var(--text);
  cursor:pointer;
  list-style:none;
  transition:background .3s var(--ease),color .3s var(--ease);
}

#faq summary::-webkit-details-marker{display:none;}

#faq summary::after{
  content:"+";
  position:absolute;
  right:18px;
  top:50%;
  transform:translateY(-50%);
  width:26px;
  height:26px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--grad-accent);
  color:#3A1A00;
  font-weight:900;
  font-size:1rem;
  line-height:1;
  transition:transform .35s var(--ease);
}

#faq details[open] summary::after{
  content:"−";
  transform:translateY(-50%) rotate(180deg);
}

#faq summary:hover{background:rgba(255,193,7,.12);color:var(--brand);}

#faq details p{
  margin:0;
  padding:0 20px 18px;
  font-size:.94rem;
  color:var(--text-soft);
  animation:fadeSlide .4s var(--ease);
}

@keyframes fadeSlide{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:translateY(0);}
}

/* ============ Contact list ============ */
.contact-list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:12px;
  margin:18px 0 8px;
}

.contact-list li{
  position:relative;
  padding:12px 16px 12px 40px;
  border-radius:var(--radius-sm);
  background:var(--surface-alt);
  border:1px solid var(--border);
  font-size:.92rem;
  color:var(--text-soft);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}

.contact-list li::before{
  content:"◆";
  position:absolute;
  left:16px;
  top:50%;
  transform:translateY(-50%);
  color:var(--brand);
  font-size:.7rem;
}

.contact-list li:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-sm);
  border-color:rgba(255,193,7,.5);
}

/* ============ Sitemap ============ */
#sitemap ul{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(150px,1fr));
  gap:10px;
  margin-top:14px;
}

#sitemap a{
  display:block;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  background:var(--surface-alt);
  border:1px solid var(--border);
  font-size:.9rem;
  font-weight:600;
  color:var(--text-soft);
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease);
}

#sitemap a:hover{
  transform:translateY(-3px);
  background:var(--grad-accent);
  color:#3A1A00;
  box-shadow:0 8px 20px rgba(255,143,60,.32);
}

/* ============ Footer ============ */
footer{
  position:relative;
  margin-top:60px;
  background:linear-gradient(160deg,#2A1210 0%,#3B1614 50%,#1E0E0E 100%);
  color:#F3E4DC;
  padding:48px 20px 32px;
  overflow:hidden;
}

footer::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(500px 260px at 12% 0%,rgba(255,193,7,.16),transparent 65%),
    radial-gradient(420px 240px at 92% 100%,rgba(183,28,28,.35),transparent 65%);
  pointer-events:none;
}

.footer-inner{
  position:relative;
  max-width:var(--maxw);
  margin:0 auto;
  display:grid;
  grid-template-columns:1.4fr 1fr 1.2fr;
  gap:32px;
}

.footer-inner h3{
  color:var(--accent);
  font-size:1rem;
  margin:0 0 12px;
}

.footer-brand p,
.footer-legal p{
  margin:0 0 10px;
  font-size:.88rem;
  color:rgba(243,228,220,.78);
  line-height:1.75;
}

.footer-brand strong{color:#fff;}

.footer-links ul{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.footer-links a{
  display:inline-block;
  font-size:.88rem;
  color:rgba(243,228,220,.82);
  padding:4px 0;
  transition:color .25s var(--ease),transform .25s var(--ease);
}

.footer-links a:hover{
  color:var(--accent);
  transform:translateX(4px);
}

#back-to-top{
  position:relative;
  display:block;
  margin:36px auto 0;
  padding:10px 26px;
  font-size:.88rem;
  font-weight:700;
  border-radius:999px;
  color:#3A1A00;
  background:var(--grad-accent);
  box-shadow:0 6px 20px rgba(255,143,60,.35);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}

#back-to-top:hover{
  transform:translateY(-3px);
  box-shadow:0 12px 30px rgba(255,143,60,.5);
  filter:brightness(1.05);
}

/* ============ Search box ============ */
#search-box{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 20px 48px;
}

#search-box form{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  padding:18px 22px;
  border-radius:var(--radius-lg);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-md);
}

#search-box label{
  font-weight:700;
  font-size:.92rem;
  color:var(--text);
  flex:0 0 auto;
}

#search-box input[type="search"]{
  flex:1 1 200px;
  min-width:0;
  padding:11px 16px;
  font-size:.95rem;
  color:var(--text);
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:999px;
  outline:none;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}

#search-box input[type="search"]::placeholder{color:var(--text-muted);}

#search-box input[type="search"]:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(255,193,7,.25);
}

#search-box button[type="submit"]{
  flex:0 0 auto;
  padding:11px 30px;
  font-weight:800;
  font-size:.95rem;
  border-radius:999px;
  color:#3A1A00;
  background:var(--grad-accent);
  box-shadow:0 6px 18px rgba(255,143,60,.32);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}

#search-box button[type="submit"]:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(255,143,60,.45);
  filter:brightness(1.05);
}

/* ============ Scroll reveal ============ */
section,
#articles article,
.slide,
.stat,
#faq details,
.contact-list li,
#sitemap li{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}

section.is-visible,
#articles article.is-visible,
.slide.is-visible,
.stat.is-visible,
#faq details.is-visible,
.contact-list li.is-visible,
#sitemap li.is-visible{
  opacity:1;
  transform:translateY(0);
}

#hero,
#breadcrumb{
  opacity:1;
  transform:none;
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  section,#articles article,.slide,.stat,#faq details,.contact-list li,#sitemap li{
    opacity:1;
    transform:none;
  }
}

/* ============ Responsive ============ */
@media (max-width:1024px){
  #main-nav a{padding:8px 9px;font-size:.86rem;}
  .footer-inner{grid-template-columns:1fr 1fr;}
  .footer-legal{grid-column:1 / -1;}
}

@media (max-width:860px){
  #menu-toggle{display:inline-flex;}

  #main-nav{
    position:absolute;
    top:var(--header-h);
    left:0;
    right:0;
    margin:0;
    padding:0 16px;
    background:var(--glass);
    -webkit-backdrop-filter:blur(20px) saturate(160%);
    backdrop-filter:blur(20px) saturate(160%);
    border-bottom:1px solid var(--glass-border);
    box-shadow:var(--shadow-md);
    max-height:0;
    overflow:hidden;
    opacity:0;
    pointer-events:none;
    transition:max-height .4s var(--ease),opacity .3s var(--ease),padding .3s var(--ease);
  }

  #main-nav.is-open{
    max-height:80vh;
    overflow-y:auto;
    opacity:1;
    pointer-events:auto;
    padding:12px 16px 20px;
  }

  #main-nav ul{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }

  #main-nav a{
    padding:12px 16px;
    font-size:.95rem;
    border-radius:var(--radius-sm);
    background:rgba(255,193,7,.08);
  }

  #main-nav a::after{display:none;}

  #hero{padding:28px 20px;border-radius:var(--radius-lg);}
  .hero-carousel{grid-template-columns:1fr;}
  .hero-stats{grid-template-columns:repeat(2,1fr);}

  .footer-inner{grid-template-columns:1fr;gap:26px;}

  #search-box form{flex-direction:column;align-items:stretch;}
  #search-box button[type="submit"]{width:100%;}
}

@media (max-width:560px){
  :root{--header-h:60px;}
  body{font-size:15px;}
  main{padding:0 14px 24px;}
  .header-inner{padding:0 14px;gap:10px;}
  .brand-name{font-size:1rem;}
  .brand svg{width:34px;height:34px;}

  section{margin:32px 0;}
  h2{padding-left:13px;}
  h2::before{width:5px;}

  #hero{margin:18px 0 36px;padding:22px 16px;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:10px;}
  .stat{padding:12px 6px;}
  .stat .num{font-size:1.4rem;}

  #breadcrumb ol{padding:8px 12px;font-size:.8rem;}

  #articles article{padding:16px;}
  #articles article:hover{transform:none;}

  #faq summary{padding:14px 46px 14px 16px;font-size:.94rem;}
  #faq details p{padding:0 16px 16px;}

  #sitemap ul{grid-template-columns:1fr 1fr;}

  #search-box{padding:0 14px 36px;}
  #search-box form{padding:14px 16px;}

  footer{padding:36px 14px 26px;}
  #back-to-top{margin-top:28px;}
}

@media (max-width:380px){
  .brand-name{display:none;}
  #sitemap ul{grid-template-columns:1fr;}
}

/* ============ Print ============ */
@media print{
  #site-header,#search-box,#back-to-top,footer,#hero::after,#hero::before{display:none !important;}
  body{background:#fff;color:#000;}
  section{box-shadow:none;border:1px solid #ddd;break-inside:avoid;}
  a{color:#000;text-decoration:underline;}
}