:root{
  --primary:#1a237e;
  --primary-light:#3949ab;
  --primary-soft:#eef2ff;
  --accent:#5c6bc0;
  --accent-2:#7e57c2;
  --text:#222;
  --text-soft:#555;
  --text-muted:#888;
  --bg:#f7f8fa;
  --bg-alt:#ffffff;
  --card:#ffffff;
  --border:#e0e0e0;
  --shadow-sm:0 2px 10px rgba(26,35,126,.06);
  --shadow-md:0 6px 22px rgba(26,35,126,.12);
  --shadow-lg:0 14px 40px rgba(26,35,126,.18);
  --glass:rgba(255,255,255,.72);
  --glass-border:rgba(255,255,255,.55);
  --radius-sm:8px;
  --radius:14px;
  --radius-lg:22px;
  --radius-pill:999px;
  --font:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:64px;
}

body.dark{
  --primary:#90caf9;
  --primary-light:#64b5f6;
  --primary-soft:#1f2430;
  --accent:#64b5f6;
  --accent-2:#9575cd;
  --text:#e0e0e0;
  --text-soft:#b0bec5;
  --text-muted:#8a9aa5;
  --bg:#121212;
  --bg-alt:#1e1e1e;
  --card:#1e1e1e;
  --border:#333;
  --shadow-sm:0 2px 10px rgba(0,0,0,.5);
  --shadow-md:0 6px 22px rgba(0,0,0,.6);
  --shadow-lg:0 14px 40px rgba(0,0,0,.7);
  --glass:rgba(30,30,30,.72);
  --glass-border:rgba(255,255,255,.08);
}

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

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  font-family:var(--font);
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  transition:background .35s var(--ease),color .35s var(--ease);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

a{color:var(--primary);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--accent-2)}
body.dark a{color:var(--primary)}

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

::selection{background:var(--primary-light);color:#fff}

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ============ HEADER ============ */
.header{
  position:sticky;
  top:0;
  z-index:1000;
  background:var(--glass);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  backdrop-filter:saturate(180%) blur(16px);
  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:1200px;
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 20px;
  gap:16px;
  min-height:var(--header-h);
}

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:20px;
  font-weight:700;
  color:var(--primary);
  white-space:nowrap;
  letter-spacing:.3px;
}
.logo svg{
  border-radius:10px;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
  box-shadow:0 4px 14px rgba(26,35,126,.25);
}
.logo:hover svg{
  transform:rotate(-6deg) scale(1.06);
  box-shadow:0 6px 20px rgba(26,35,126,.4);
}

.nav{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  font-size:15px;
}
.nav a{
  position:relative;
  padding:6px 0;
  color:var(--text-soft);
  font-weight:500;
  transition:color .25s var(--ease);
}
.nav a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent-2));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
  border-radius:2px;
}
.nav a:hover{color:var(--primary)}
.nav a:hover::after{transform:scaleX(1)}

.header-tools{display:flex;align-items:center;gap:10px}

.search-box{
  display:flex;
  align-items:center;
  border:1px solid var(--border);
  border-radius:var(--radius-pill);
  padding:4px 6px 4px 14px;
  background:var(--bg-alt);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.search-box:focus-within{
  border-color:var(--primary-light);
  box-shadow:0 0 0 3px rgba(57,73,171,.15);
}
.search-box input{
  border:none;
  outline:none;
  background:transparent;
  color:inherit;
  width:130px;
  font-size:14px;
  font-family:inherit;
}
.search-box input::placeholder{color:var(--text-muted)}
.search-box button{
  border:none;
  background:none;
  cursor:pointer;
  font-size:14px;
  color:var(--primary);
  padding:4px 8px;
  border-radius:var(--radius-pill);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.search-box button:hover{background:var(--primary-soft);transform:scale(1.1)}

.icon-btn{
  border:none;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;
  border-radius:var(--radius-pill);
  padding:8px 14px;
  cursor:pointer;
  font-size:14px;
  font-weight:600;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
  box-shadow:0 4px 14px rgba(26,35,126,.28);
}
.icon-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 22px rgba(26,35,126,.4);
  filter:brightness(1.08);
}
.icon-btn:active{transform:translateY(0) scale(.97)}

.menu-toggle{
  display:none;
  border:none;
  background:none;
  font-size:24px;
  cursor:pointer;
  color:var(--text);
  padding:4px 8px;
  border-radius:var(--radius-sm);
  transition:background .2s var(--ease);
}
.menu-toggle:hover{background:var(--primary-soft)}

/* ============ HERO ============ */
.hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#1a237e 0%,#3949ab 45%,#5e35b1 100%);
  color:#fff;
  padding:72px 20px 56px;
  text-align:center;
  isolation:isolate;
}
.hero::before{
  content:"";
  position:absolute;
  inset:-40%;
  background:
    radial-gradient(circle at 20% 30%,rgba(255,255,255,.18),transparent 45%),
    radial-gradient(circle at 80% 70%,rgba(126,87,194,.5),transparent 50%),
    radial-gradient(circle at 55% 10%,rgba(100,181,246,.35),transparent 45%);
  animation:heroFloat 16s ease-in-out infinite;
  z-index:-1;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.18));
  z-index:-1;
  pointer-events:none;
}
@keyframes heroFloat{
  0%,100%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(-3%,2%,0) scale(1.08)}
}

.hero h1{
  font-size:34px;
  margin-bottom:18px;
  line-height:1.4;
  font-weight:800;
  letter-spacing:.5px;
  text-shadow:0 4px 24px rgba(0,0,0,.25);
  animation:heroIn .8s var(--ease) both;
}
.hero p{
  max-width:820px;
  margin:0 auto 28px;
  font-size:16px;
  opacity:.95;
  animation:heroIn .8s .12s var(--ease) both;
}
@keyframes heroIn{
  from{opacity:0;transform:translateY(22px)}
  to{opacity:1;transform:none}
}

.hero-cta{
  display:inline-block;
  background:rgba(255,255,255,.96);
  color:#1a237e;
  padding:13px 34px;
  border-radius:var(--radius-pill);
  font-weight:700;
  letter-spacing:.3px;
  box-shadow:0 8px 26px rgba(0,0,0,.22);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),background .28s var(--ease);
  animation:heroIn .8s .24s var(--ease) both;
}
.hero-cta:hover{
  transform:translateY(-4px) scale(1.02);
  box-shadow:0 14px 36px rgba(0,0,0,.32);
  background:#fff;
  color:#1a237e;
}

.slides{
  position:relative;
  height:170px;
  margin-top:36px;
  max-width:900px;
  margin-left:auto;
  margin-right:auto;
}
.slide{
  position:absolute;
  inset:0;
  opacity:0;
  transform:translateY(12px);
  transition:opacity .8s var(--ease),transform .8s var(--ease);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:8px;
  pointer-events:none;
}
.slide.active{
  opacity:1;
  transform:none;
  pointer-events:auto;
}
.slide h2{
  font-size:23px;
  font-weight:700;
  letter-spacing:.4px;
}
.slide p{font-size:15px;opacity:.9;margin:0}

/* ============ LAYOUT ============ */
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

.section{
  padding:56px 0;
  position:relative;
}
.section h2{
  font-size:27px;
  color:var(--primary);
  margin-bottom:14px;
  position:relative;
  padding-left:16px;
  font-weight:800;
  letter-spacing:.3px;
}
.section h2::before{
  content:"";
  position:absolute;
  left:0;
  top:7px;
  bottom:7px;
  width:5px;
  background:linear-gradient(180deg,var(--primary),var(--accent-2));
  border-radius:3px;
  box-shadow:0 2px 8px rgba(57,73,171,.35);
}
.section h3{
  font-size:20px;
  margin:28px 0 12px;
  color:var(--accent);
  font-weight:700;
  letter-spacing:.2px;
}
.section h4{
  font-size:17px;
  margin:18px 0 8px;
  color:var(--text-soft);
  font-weight:700;
}
.section p{
  margin-bottom:14px;
  text-align:justify;
  color:var(--text-soft);
}
.section ul{
  list-style:none;
  padding-left:0;
}
.section ul li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  color:var(--text-soft);
}
.section ul li::before{
  content:"";
  position:absolute;
  left:4px;
  top:.7em;
  width:7px;
  height:7px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent-2));
  box-shadow:0 0 0 3px rgba(57,73,171,.12);
}

.lead{
  font-size:16px;
  color:var(--text);
  background:linear-gradient(135deg,var(--primary-soft),rgba(126,87,194,.08));
  padding:20px 22px;
  border-left:4px solid var(--primary-light);
  border-radius:var(--radius);
  margin-bottom:26px;
  line-height:1.85;
  box-shadow:var(--shadow-sm);
}

/* ============ GRID & CARDS ============ */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:22px;
  margin-top:22px;
}

.card{
  background:var(--card);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:linear-gradient(90deg,var(--primary),var(--accent-2));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .35s var(--ease);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-md);
  border-color:transparent;
}
.card:hover::before{transform:scaleX(1)}
.card h4{
  color:var(--primary);
  margin-bottom:10px;
  font-size:17px;
  font-weight:700;
}
.card p{
  font-size:14px;
  color:var(--text-soft);
  margin:0;
}

/* ============ STATS ============ */
.stats{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:18px;
  text-align:center;
  margin-top:26px;
}
.stat{
  background:var(--card);
  border-radius:var(--radius);
  padding:26px 12px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.stat .num{
  font-size:34px;
  font-weight:800;
  background:linear-gradient(135deg,var(--primary),var(--accent-2));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:var(--primary);
  line-height:1.2;
}
.stat .label{
  font-size:14px;
  color:var(--text-muted);
  margin-top:6px;
}

/* ============ ARTICLES ============ */
.article-list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  gap:22px;
  margin-top:22px;
}
.article{
  background:var(--card);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border);
  display:flex;
  flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
  position:relative;
}
.article:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-md);
}
.article h4{
  color:var(--primary);
  font-size:17px;
  margin-bottom:8px;
  font-weight:700;
  line-height:1.5;
}
.article .meta{
  font-size:13px;
  color:var(--text-muted);
  margin-bottom:10px;
  padding-bottom:10px;
  border-bottom:1px dashed var(--border);
}
.article .summary{
  font-size:14px;
  color:var(--text-soft);
  flex:1;
  margin:0;
}
.article .read-more{
  margin-top:14px;
  font-size:14px;
  font-weight:700;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap .25s var(--ease),color .25s var(--ease);
}
.article .read-more:hover{
  gap:9px;
  color:var(--accent-2);
}

/* ============ FAQ ============ */
.faq-item{
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin-bottom:12px;
  overflow:hidden;
  background:var(--card);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.faq-item:hover{box-shadow:var(--shadow-sm)}
.faq-item.open{
  border-color:var(--primary-light);
  box-shadow:var(--shadow-sm);
}
.faq-q{
  padding:17px 20px;
  font-weight:700;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  color:var(--primary);
  transition:background .25s var(--ease);
  user-select:none;
}
.faq-q:hover{background:var(--primary-soft)}
.faq-q::after{
  content:"+";
  font-size:22px;
  font-weight:400;
  flex-shrink:0;
  transition:transform .3s var(--ease);
  color:var(--accent);
}
.faq-item.open .faq-q::after{
  content:"−";
  transform:rotate(180deg);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s var(--ease),padding .35s var(--ease);
  padding:0 20px;
}
.faq-item.open .faq-a{
  max-height:600px;
  padding:0 20px 18px;
}
.faq-a p{
  font-size:14px;
  color:var(--text-soft);
  margin:0;
  line-height:1.85;
}

/* ============ HOWTO ============ */
.howto-step{
  display:flex;
  gap:16px;
  margin-bottom:16px;
  background:var(--card);
  padding:18px;
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.howto-step:hover{
  transform:translateX(6px);
  box-shadow:var(--shadow-md);
}
.step-num{
  flex-shrink:0;
  width:38px;
  height:38px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent-2));
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:16px;
  box-shadow:0 4px 14px rgba(57,73,171,.35);
}
.step-body h4{
  margin:0 0 6px;
  color:var(--primary);
  font-size:16px;
}
.step-body p{
  font-size:14px;
  color:var(--text-soft);
  margin:0;
}

/* ============ CASE ============ */
.case{
  background:var(--card);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border);
  margin-bottom:18px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.case h4{
  color:var(--primary);
  margin-bottom:8px;
  font-size:17px;
}
.case .result{
  font-size:14px;
  color:#2e7d32;
  font-weight:700;
  margin-top:10px;
  padding:8px 12px;
  background:rgba(46,125,50,.08);
  border-radius:var(--radius-sm);
  display:inline-block;
}
body.dark .case .result{
  color:#81c784;
  background:rgba(129,199,132,.1);
}

/* ============ TESTIMONIAL ============ */
.testimonial{
  background:linear-gradient(135deg,var(--primary-soft),rgba(126,87,194,.08));
  border-radius:var(--radius);
  padding:22px;
  margin-bottom:18px;
  border-left:4px solid var(--primary-light);
  position:relative;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.testimonial:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-sm);
}
.testimonial::before{
  content:"\201C";
  position:absolute;
  top:-8px;
  right:20px;
  font-size:64px;
  color:var(--primary-light);
  opacity:.18;
  font-family:Georgia,serif;
  line-height:1;
}
.testimonial p{
  font-style:italic;
  margin-bottom:10px;
  color:var(--text-soft);
}
.testimonial .who{
  font-size:14px;
  color:var(--text);
  font-weight:700;
  font-style:normal;
}

/* ============ CONTACT ============ */
.contact-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:18px;
  margin-top:18px;
}
.contact-item{
  background:var(--card);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.contact-item:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-md);
  border-color:var(--primary-light);
}
.contact-item h4{
  color:var(--primary);
  margin-bottom:8px;
  font-size:16px;
}
.contact-item p{
  font-size:14px;
  color:var(--text-soft);
  margin:0;
  word-break:break-word;
}

/* ============ BREADCRUMB ============ */
.breadcrumb{
  font-size:14px;
  color:var(--text-muted);
  padding:18px 0;
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  align-items:center;
}
.breadcrumb a{
  color:var(--accent);
  transition:color .2s var(--ease);
}
.breadcrumb a:hover{color:var(--accent-2)}
.breadcrumb span{color:var(--text-soft)}

/* ============ FOOTER ============ */
.footer{
  position:relative;
  background:linear-gradient(135deg,#1a237e 0%,#283593 55%,#4527a0 100%);
  color:#cfd8dc;
  padding:48px 20px 24px;
  margin-top:48px;
  overflow:hidden;
}
.footer::before{
  content:"";
  position:absolute;
  top:-50%;
  right:-10%;
  width:400px;
  height:400px;
  background:radial-gradient(circle,rgba(126,87,194,.3),transparent 70%);
  pointer-events:none;
}
.footer .footer-inner{
  max-width:1200px;
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:28px;
  position:relative;
  z-index:1;
}
.footer h4{
  color:#fff;
  margin-bottom:14px;
  font-size:16px;
  font-weight:700;
  position:relative;
  padding-bottom:10px;
}
.footer h4::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:32px;
  height:2px;
  background:linear-gradient(90deg,#90caf9,#b39ddb);
  border-radius:2px;
}
.footer ul{list-style:none}
.footer li{
  margin-bottom:8px;
  font-size:14px;
  color:#b0bec5;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer li:hover{color:#fff;transform:translateX(4px)}
.footer a{color:#cfd8dc;transition:color .2s var(--ease)}
.footer a:hover{color:#fff}
.footer p{font-size:14px;color:#b0bec5;margin:0}
.footer-bottom{
  max-width:1200px;
  margin:28px auto 0;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.15);
  text-align:center;
  font-size:13px;
  color:#b0bec5;
  position:relative;
  z-index:1;
}
.footer-bottom p{margin:4px 0;color:#b0bec5}

/* ============ BACK TOP ============ */
.back-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:50px;
  height:50px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent-2));
  color:#fff;
  border:none;
  font-size:20px;
  cursor:pointer;
  display:none;
  z-index:999;
  box-shadow:0 6px 20px rgba(26,35,126,.4);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
}
.back-top.show{display:block;animation:fadeUp .4s var(--ease)}
.back-top:hover{
  transform:translateY(-4px) scale(1.06);
  box-shadow:0 10px 28px rgba(26,35,126,.55);
  filter:brightness(1.1);
}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:none}
}

/* ============ SCROLL REVEAL ============ */
.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}
.reveal.visible{
  opacity:1;
  transform:none;
}

/* ============ RESPONSIVE ============ */
@media(max-width:992px){
  .nav{gap:14px;font-size:14px}
  .search-box input{width:100px}
  .hero h1{font-size:29px}
}

@media(max-width:768px){
  :root{--header-h:58px}

  .header-inner{padding:8px 16px;gap:10px}

  .nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:var(--glass);
    -webkit-backdrop-filter:saturate(180%) blur(16px);
    backdrop-filter:saturate(180%) blur(16px);
    flex-direction:column;
    padding:16px 20px;
    box-shadow:var(--shadow-md);
    border-bottom:1px solid var(--glass-border);
    gap:4px;
    animation:navDrop .3s var(--ease);
  }
  @keyframes navDrop{
    from{opacity:0;transform:translateY(-10px)}
    to{opacity:1;transform:none}
  }
  .nav.open{display:flex}
  .nav a{padding:10px 4px;border-bottom:1px solid var(--border)}
  .nav a::after{display:none}

  .menu-toggle{display:block}

  .search-box input{width:76px}
  .search-box{padding-left:10px}

  .hero{padding:52px 16px 44px}
  .hero h1{font-size:24px;letter-spacing:.2px}
  .hero p{font-size:15px}
  .hero-cta{padding:11px 26px;font-size:15px}
  .slides{height:210px;margin-top:28px}
  .slide h2{font-size:19px}
  .slide p{font-size:14px;padding:0 8px}

  .container{padding:0 16px}
  .section{padding:40px 0}
  .section h2{font-size:22px;padding-left:14px}
  .section h3{font-size:18px;margin-top:22px}
  .section h4{font-size:16px}
  .lead{padding:16px;font-size:15px}

  .grid,.article-list,.contact-grid{gap:16px}
  .card,.article,.case,.contact-item{padding:18px}

  .howto-step{padding:16px;gap:12px}
  .step-num{width:34px;height:34px;font-size:15px}

  .footer{padding:36px 16px 20px;margin-top:36px}
  .footer .footer-inner{gap:22px}

  .back-top{right:16px;bottom:16px;width:44px;height:44px;font-size:18px}
}

@media(max-width:480px){
  .logo{font-size:17px}
  .logo svg{width:28px;height:28px}
  .search-box input{width:60px;font-size:13px}
  .icon-btn{padding:7px 11px;font-size:13px}
  .hero h1{font-size:21px}
  .hero p{font-size:14px}
  .section h2{font-size:20px}
  .grid,.article-list{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat .num{font-size:28px}
}

/* ============ 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,.footer,.back-top,.hero-cta,.search-box,.icon-btn,.menu-toggle{display:none !important}
  body{background:#fff;color:#000}
  .section{padding:20px 0;page-break-inside:avoid}
  .card,.article,.case{box-shadow:none;border:1px solid #ccc}
}