:root{
  --brand:#1f6feb;
  --brand-dark:#0d47a1;
  --brand-light:#4d9bff;
  --accent:#ff7a45;
  --accent-dark:#c2410c;
  --green:#0f9d58;
  --bg:#f7f9fc;
  --bg-alt:#eef3fa;
  --card:#ffffff;
  --card-glass:rgba(255,255,255,.72);
  --text:#1c2430;
  --muted:#5b6675;
  --border:#e3e8ef;
  --shadow:0 6px 24px rgba(28,36,48,.08);
  --shadow-lg:0 16px 48px rgba(28,36,48,.14);
  --radius:14px;
  --radius-lg:20px;
  --radius-sm:10px;
  --blur:14px;
  --transition:.28s cubic-bezier(.4,0,.2,1);
  --grad-hero:linear-gradient(135deg,rgba(31,111,235,.14) 0%,rgba(77,155,255,.08) 40%,rgba(255,122,69,.14) 100%);
  --grad-brand:linear-gradient(135deg,#1f6feb 0%,#0d47a1 100%);
  --grad-accent:linear-gradient(135deg,#ff7a45 0%,#c2410c 100%);
}

html[data-theme="dark"]{
  --brand:#4d9bff;
  --brand-dark:#7fb8ff;
  --brand-light:#8ec5ff;
  --accent:#ff9a6b;
  --accent-dark:#ff7a45;
  --green:#34d399;
  --bg:#0f141b;
  --bg-alt:#131a24;
  --card:#161d27;
  --card-glass:rgba(22,29,39,.72);
  --text:#e6edf6;
  --muted:#9aa7b8;
  --border:#25303d;
  --shadow:0 6px 24px rgba(0,0,0,.45);
  --shadow-lg:0 16px 48px rgba(0,0,0,.6);
  --grad-hero:linear-gradient(135deg,rgba(77,155,255,.16) 0%,rgba(31,111,235,.06) 40%,rgba(255,154,107,.14) 100%);
  --grad-brand:linear-gradient(135deg,#4d9bff 0%,#1f6feb 100%);
  --grad-accent:linear-gradient(135deg,#ff9a6b 0%,#ff7a45 100%);
}

*,
*::before,
*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

html{
  scroll-behavior:smooth;
  scroll-padding-top:80px;
  -webkit-text-size-adjust:100%;
}

body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  transition:background var(--transition),color var(--transition);
}

img,
svg{
  max-width:100%;
  display:block;
  height:auto;
}

a{
  color:var(--brand);
  text-decoration:none;
  transition:color var(--transition);
}

a:hover{
  text-decoration:underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:4px;
}

ul,
ol{
  list-style:none;
}

button{
  font-family:inherit;
}

.container{
  width:min(1180px,92%);
  margin:0 auto;
}

.skip-link{
  position:absolute;
  left:-9999px;
  top:0;
  background:var(--brand);
  color:#fff;
  padding:10px 16px;
  z-index:999;
  border-radius:0 0 var(--radius-sm) 0;
  font-weight:600;
}

.skip-link:focus{
  left:0;
  top:0;
  text-decoration:none;
}

/* ===== Header ===== */
header.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--card-glass);
  -webkit-backdrop-filter:blur(var(--blur)) saturate(1.6);
  backdrop-filter:blur(var(--blur)) saturate(1.6);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 16px rgba(28,36,48,.06);
  transition:background var(--transition),border-color var(--transition),box-shadow var(--transition);
}

html[data-theme="dark"] header.site-header{
  box-shadow:0 2px 16px rgba(0,0,0,.4);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:20px;
  color:var(--text);
  flex-shrink:0;
}

.brand:hover{
  text-decoration:none;
}

.brand svg{
  width:38px;
  height:38px;
  flex-shrink:0;
  transition:transform var(--transition);
}

.brand:hover svg{
  transform:rotate(15deg) scale(1.05);
}

.brand small{
  display:block;
  font-size:11px;
  font-weight:400;
  color:var(--muted);
  letter-spacing:.5px;
  line-height:1.4;
}

nav.main-nav ul{
  display:flex;
  gap:4px;
  flex-wrap:wrap;
}

nav.main-nav a{
  display:block;
  padding:8px 12px;
  border-radius:var(--radius-sm);
  color:var(--text);
  font-size:15px;
  font-weight:500;
  position:relative;
  transition:background var(--transition),color var(--transition);
}

nav.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:4px;
  height:2px;
  background:var(--brand);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--transition);
}

nav.main-nav a:hover{
  background:rgba(31,111,235,.08);
  color:var(--brand);
  text-decoration:none;
}

nav.main-nav a:hover::after{
  transform:scaleX(1);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:8px;
  flex-shrink:0;
}

.search-box{
  display:flex;
  align-items:center;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  overflow:hidden;
  background:var(--bg);
  transition:border-color var(--transition),box-shadow var(--transition);
}

.search-box:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(31,111,235,.15);
}

.search-box input{
  border:0;
  background:transparent;
  color:var(--text);
  padding:8px 10px;
  width:150px;
  font-size:14px;
  outline:none;
}

.search-box input::placeholder{
  color:var(--muted);
}

.search-box button{
  border:0;
  background:var(--grad-brand);
  color:#fff;
  padding:8px 14px;
  cursor:pointer;
  font-size:14px;
  font-weight:500;
  transition:filter var(--transition);
}

.search-box button:hover{
  filter:brightness(1.1);
}

.icon-btn{
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  width:38px;
  height:38px;
  border-radius:var(--radius-sm);
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  transition:border-color var(--transition),color var(--transition),transform var(--transition),background var(--transition);
}

.icon-btn:hover{
  border-color:var(--brand);
  color:var(--brand);
  transform:translateY(-1px);
}

.icon-btn:active{
  transform:scale(.95);
}

.menu-toggle{
  display:none;
}

/* ===== Breadcrumb ===== */
.breadcrumb{
  padding:14px 0;
  font-size:14px;
  color:var(--muted);
}

.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
}

.breadcrumb a{
  color:var(--muted);
}

.breadcrumb a:hover{
  color:var(--brand);
  text-decoration:none;
}

.breadcrumb li+li::before{
  content:"›";
  margin-right:6px;
  color:var(--muted);
}

/* ===== Hero ===== */
.hero{
  position:relative;
  background:var(--grad-hero);
  border-bottom:1px solid var(--border);
  overflow:hidden;
}

.hero::before{
  content:"";
  position:absolute;
  top:-40%;
  right:-10%;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(31,111,235,.18),transparent 70%);
  pointer-events:none;
  animation:floatBlob 12s ease-in-out infinite alternate;
}

.hero::after{
  content:"";
  position:absolute;
  bottom:-30%;
  left:-8%;
  width:420px;
  height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.16),transparent 70%);
  pointer-events:none;
  animation:floatBlob 14s ease-in-out infinite alternate-reverse;
}

@keyframes floatBlob{
  0%{transform:translate(0,0) scale(1)}
  100%{transform:translate(-30px,30px) scale(1.08)}
}

.hero-inner{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:32px;
  align-items:center;
  padding:48px 0;
}

.hero h1{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.3;
  margin-bottom:16px;
  letter-spacing:.5px;
  font-weight:800;
}

.hero h1 .kw{
  color:var(--brand);
  background:linear-gradient(135deg,var(--brand),var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.hero p.lead{
  font-size:17px;
  color:var(--muted);
  margin-bottom:20px;
}

.hero-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:22px;
}

.btn{
  display:inline-block;
  padding:11px 22px;
  border-radius:var(--radius-sm);
  font-weight:600;
  font-size:15px;
  cursor:pointer;
  border:1px solid transparent;
  transition:transform var(--transition),box-shadow var(--transition),background var(--transition),filter var(--transition);
  position:relative;
  overflow:hidden;
}

.btn:hover{
  text-decoration:none;
  transform:translateY(-2px);
}

.btn:active{
  transform:translateY(0) scale(.98);
}

.btn-primary{
  background:var(--grad-brand);
  color:#fff;
  box-shadow:0 4px 16px rgba(31,111,235,.3);
}

.btn-primary:hover{
  box-shadow:0 8px 24px rgba(31,111,235,.4);
  filter:brightness(1.08);
}

.btn-ghost{
  background:var(--card-glass);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  color:var(--brand);
  border-color:var(--brand);
}

.btn-ghost:hover{
  background:rgba(31,111,235,.1);
}

.hero-stats{
  display:flex;
  gap:26px;
  flex-wrap:wrap;
}

.hero-stats .stat b{
  display:block;
  font-size:26px;
  color:var(--brand);
  line-height:1.2;
  font-weight:800;
  font-variant-numeric:tabular-nums;
}

.hero-stats .stat span{
  font-size:13px;
  color:var(--muted);
}

/* ===== Slider ===== */
.slider{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  background:var(--card);
  border:1px solid var(--border);
}

.slides{
  position:relative;
  height:300px;
}

.slide{
  position:absolute;
  inset:0;
  opacity:0;
  transition:opacity .7s ease;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  padding:22px;
  color:#fff;
  z-index:1;
}

.slide.active{
  opacity:1;
  z-index:2;
}

.slide h3{
  font-size:20px;
  margin-bottom:6px;
  font-weight:700;
}

.slide p{
  font-size:14px;
  opacity:.92;
}

.slide-1{
  background:linear-gradient(135deg,#1f6feb,#0d47a1);
}

.slide-2{
  background:linear-gradient(135deg,#ff7a45,#c2410c);
}

.slide-3{
  background:linear-gradient(135deg,#0f9d58,#0b6b3c);
}

.slider-dots{
  position:absolute;
  bottom:12px;
  right:16px;
  display:flex;
  gap:6px;
  z-index:3;
}

.slider-dots button{
  width:9px;
  height:9px;
  border-radius:50%;
  border:0;
  background:rgba(255,255,255,.5);
  cursor:pointer;
  padding:0;
  transition:width var(--transition),background var(--transition);
}

.slider-dots button.active{
  background:#fff;
  width:22px;
  border-radius:5px;
}

.slider-dots button:hover{
  background:rgba(255,255,255,.85);
}

/* ===== Sections ===== */
section{
  padding:52px 0;
  transition:background var(--transition);
}

section:nth-child(even){
  background:var(--card);
}

.section-head{
  max-width:760px;
  margin-bottom:28px;
}

.section-head h2{
  font-size:clamp(22px,2.4vw,30px);
  margin-bottom:10px;
  line-height:1.35;
  font-weight:800;
  position:relative;
  padding-bottom:12px;
}

.section-head h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:56px;
  height:4px;
  border-radius:2px;
  background:var(--grad-brand);
}

.section-head p{
  color:var(--muted);
}

/* ===== Grid ===== */
.grid{
  display:grid;
  gap:20px;
}

.grid-3{
  grid-template-columns:repeat(3,1fr);
}

.grid-2{
  grid-template-columns:repeat(2,1fr);
}

.grid-4{
  grid-template-columns:repeat(4,1fr);
}

/* ===== Cards ===== */
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
  position:relative;
  overflow:hidden;
}

.card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:var(--grad-brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--transition);
}

.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(31,111,235,.3);
}

.card:hover::before{
  transform:scaleX(1);
}

.card h3{
  font-size:18px;
  margin-bottom:8px;
  font-weight:700;
  line-height:1.4;
}

.card h4{
  font-size:15px;
  margin:12px 0 6px;
  color:var(--brand);
  font-weight:600;
}

.card p{
  color:var(--muted);
  font-size:15px;
}

.card p+p{
  margin-top:10px;
}

.card .meta{
  font-size:13px;
  color:var(--muted);
  margin-top:10px;
}

/* ===== Tags ===== */
.tag{
  display:inline-block;
  font-size:12px;
  padding:2px 10px;
  border-radius:20px;
  background:rgba(31,111,235,.1);
  color:var(--brand);
  margin-right:6px;
  margin-bottom:6px;
  font-weight:500;
  transition:background var(--transition),color var(--transition);
}

.tag:hover{
  background:var(--brand);
  color:#fff;
}

/* ===== Article list ===== */
.article-list{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}

.article-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:8px;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
  position:relative;
  overflow:hidden;
}

.article-card::after{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:var(--grad-accent);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform var(--transition);
}

.article-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(255,122,69,.3);
}

.article-card:hover::after{
  transform:scaleY(1);
}

.article-card h3{
  font-size:17px;
  line-height:1.4;
  font-weight:700;
}

.article-card h3 a{
  color:var(--text);
  transition:color var(--transition);
}

.article-card h3 a:hover{
  color:var(--brand);
  text-decoration:none;
}

.article-card time{
  font-size:13px;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}

.article-card p{
  color:var(--muted);
  font-size:14px;
  flex:1;
}

.article-card a.more{
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap var(--transition),color var(--transition);
}

.article-card a.more:hover{
  gap:8px;
  text-decoration:none;
}

/* ===== FAQ ===== */
.faq-list{
  max-width:900px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:12px;
}

.faq-item{
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  background:var(--card);
  overflow:hidden;
  transition:border-color var(--transition),box-shadow var(--transition);
}

.faq-item:hover{
  border-color:rgba(31,111,235,.35);
}

.faq-item.open{
  border-color:var(--brand);
  box-shadow:0 4px 20px rgba(31,111,235,.12);
}

.faq-q{
  width:100%;
  text-align:left;
  background:transparent;
  border:0;
  padding:16px 18px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  transition:color var(--transition);
}

.faq-q:hover{
  color:var(--brand);
}

.faq-q .arrow{
  transition:transform var(--transition);
  color:var(--brand);
  flex-shrink:0;
}

.faq-item.open .faq-q .arrow{
  transform:rotate(180deg);
}

.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}

.faq-a-inner{
  padding:0 18px 16px;
  color:var(--muted);
  font-size:15px;
}

.faq-item.open .faq-a{
  max-height:600px;
}

/* ===== HowTo ===== */
.howto-steps{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:14px;
  counter-reset:step;
  margin-top:8px;
}

.howto-step{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:18px;
  position:relative;
  transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}

.howto-step:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(31,111,235,.3);
}

.howto-step::before{
  counter-increment:step;
  content:counter(step);
  position:absolute;
  top:-12px;
  left:16px;
  width:26px;
  height:26px;
  border-radius:50%;
  background:var(--grad-brand);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:700;
  box-shadow:0 3px 10px rgba(31,111,235,.35);
}

.howto-step h4{
  margin-top:8px;
  font-size:15px;
  font-weight:700;
}

.howto-step p{
  font-size:14px;
  color:var(--muted);
}

/* ===== Reveal animation ===== */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
  will-change:opacity,transform;
}

.reveal.visible{
  opacity:1;
  transform:none;
}

/* ===== Testimonial ===== */
.testimonial{
  background:var(--card-glass);
  -webkit-backdrop-filter:blur(var(--blur));
  backdrop-filter:blur(var(--blur));
  border-left:4px solid var(--brand);
  border-radius:var(--radius-sm);
  padding:18px 20px;
  box-shadow:var(--shadow);
  transition:transform var(--transition),box-shadow var(--transition);
}

.testimonial:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-lg);
}

.testimonial p{
  font-style:italic;
  color:var(--text);
}

.testimonial footer{
  margin-top:10px;
  font-size:13px;
  color:var(--muted);
}

/* ===== Contact ===== */
.contact-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:28px;
}

.contact-info dl{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:10px 16px;
  font-size:15px;
  margin-bottom:16px;
}

.contact-info dt{
  color:var(--muted);
  white-space:nowrap;
}

.contact-info dd{
  font-weight:600;
  word-break:break-word;
}

/* ===== Footer ===== */
footer.site-footer{
  background:linear-gradient(180deg,#0d1420 0%,#0a0f18 100%);
  color:#c8d3e0;
  padding:48px 0 20px;
  font-size:14px;
  position:relative;
  overflow:hidden;
}

footer.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:var(--grad-brand);
}

footer.site-footer a{
  color:#9cc3ff;
  transition:color var(--transition);
}

footer.site-footer a:hover{
  color:#fff;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:28px;
  margin-bottom:32px;
}

footer h3{
  font-size:15px;
  color:#fff;
  margin-bottom:12px;
  font-weight:700;
}

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

footer ul a{
  display:inline-block;
  transition:transform var(--transition),color var(--transition);
}

footer ul a:hover{
  transform:translateX(4px);
}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-top:18px;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:#8b9bb0;
}

/* ===== Back to top ===== */
#backToTop{
  position:fixed;
  right:22px;
  bottom:22px;
  width:46px;
  height:46px;
  border-radius:50%;
  border:0;
  background:var(--grad-brand);
  color:#fff;
  font-size:20px;
  cursor:pointer;
  box-shadow:0 6px 20px rgba(31,111,235,.4);
  opacity:0;
  pointer-events:none;
  transition:opacity var(--transition),transform var(--transition),filter var(--transition);
  z-index:120;
  display:flex;
  align-items:center;
  justify-content:center;
}

#backToTop.show{
  opacity:1;
  pointer-events:auto;
}

#backToTop:hover{
  transform:translateY(-3px) scale(1.05);
  filter:brightness(1.1);
}

#backToTop:active{
  transform:scale(.95);
}

/* ===== Anchor nav / pills ===== */
.anchor-nav{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}

.anchor-nav a{
  font-size:13px;
  padding:6px 12px;
  border:1px solid var(--border);
  border-radius:20px;
  background:var(--card-glass);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  color:var(--muted);
  transition:border-color var(--transition),color var(--transition),transform var(--transition),background var(--transition);
}

.anchor-nav a:hover{
  border-color:var(--brand);
  color:var(--brand);
  text-decoration:none;
  transform:translateY(-2px);
  background:var(--card);
}

.pill-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.pill-list li{
  font-size:13px;
  padding:5px 12px;
  border-radius:20px;
  background:rgba(31,111,235,.08);
  color:var(--brand);
  transition:background var(--transition),color var(--transition),transform var(--transition);
}

.pill-list li:hover{
  background:var(--brand);
  color:#fff;
  transform:translateY(-2px);
}

.pill-list li a{
  color:inherit;
}

.pill-list li:hover a{
  color:#fff;
  text-decoration:none;
}

.note{
  font-size:13px;
  color:var(--muted);
  margin-top:12px;
}

/* ===== Responsive ===== */
@media(max-width:900px){
  nav.main-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:var(--card-glass);
    -webkit-backdrop-filter:blur(var(--blur)) saturate(1.6);
    backdrop-filter:blur(var(--blur)) saturate(1.6);
    border-bottom:1px solid var(--border);
    padding:10px 4%;
    box-shadow:var(--shadow);
    animation:slideDown .3s ease;
  }

  @keyframes slideDown{
    from{opacity:0;transform:translateY(-8px)}
    to{opacity:1;transform:translateY(0)}
  }

  nav.main-nav.open{
    display:block;
  }

  nav.main-nav ul{
    flex-direction:column;
    gap:2px;
  }

  nav.main-nav a{
    padding:10px 12px;
  }

  .menu-toggle{
    display:flex;
  }

  .search-box input{
    width:110px;
  }

  .hero-inner{
    grid-template-columns:1fr;
    padding:32px 0;
  }

  .slides{
    height:220px;
  }

  .grid-3,
  .grid-4{
    grid-template-columns:repeat(2,1fr);
  }

  .howto-steps{
    grid-template-columns:repeat(2,1fr);
  }

  .contact-grid{
    grid-template-columns:1fr;
  }

  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}

@media(max-width:760px){
  .article-list{
    grid-template-columns:1fr;
  }
}

@media(max-width:600px){
  body{
    font-size:15px;
  }

  .grid-2,
  .grid-3,
  .grid-4{
    grid-template-columns:1fr;
  }

  .hero h1{
    font-size:clamp(22px,6vw,30px);
  }

  .hero p.lead{
    font-size:15px;
  }

  .hero-stats{
    gap:18px;
  }

  .hero-stats .stat b{
    font-size:22px;
  }

  .header-inner{
    gap:8px;
  }

  .brand{
    font-size:17px;
  }

  .brand svg{
    width:32px;
    height:32px;
  }

  .brand small{
    display:none;
  }

  .search-box{
    display:none;
  }

  section{
    padding:36px 0;
  }

  .card{
    padding:18px;
  }

  .article-card{
    padding:16px;
  }

  .slides{
    height:190px;
  }

  .slide{
    padding:16px;
  }

  .slide h3{
    font-size:17px;
  }

  .slide p{
    font-size:13px;
  }

  #backToTop{
    right:14px;
    bottom:14px;
    width:42px;
    height:42px;
  }
}

@media(max-width:520px){
  .howto-steps{
    grid-template-columns:1fr;
  }

  .footer-grid{
    grid-template-columns:1fr;
  }

  .contact-info dl{
    grid-template-columns:1fr;
    gap:4px 0;
  }

  .contact-info dd{
    margin-bottom:8px;
  }
}

/* ===== Reduced motion ===== */
@media(prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }

  .reveal{
    opacity:1;
    transform:none;
  }
}

/* ===== Print ===== */
@media print{
  header.site-header,
  #backToTop,
  .slider,
  .hero-actions,
  .search-box,
  .icon-btn{
    display:none !important;
  }

  body{
    background:#fff;
    color:#000;
  }

  .card{
    box-shadow:none;
    border:1px solid #ccc;
    break-inside:avoid;
  }

  .reveal{
    opacity:1;
    transform:none;
  }
}