:root{
  --brand:#0a6e7c;
  --brand-2:#e8a13a;
  --brand-3:#0f8a9c;
  --bg:#f7f9fa;
  --bg-soft:#eef4f5;
  --text:#1f2d30;
  --muted:#5b6b6f;
  --card:#ffffff;
  --card-glass:rgba(255,255,255,.72);
  --line:#e2e8ea;
  --shadow-sm:0 2px 10px rgba(10,110,124,.05);
  --shadow-md:0 10px 30px rgba(10,110,124,.10);
  --shadow-lg:0 20px 50px rgba(10,110,124,.16);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:24px;
  --header-h:66px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --gradient-brand:linear-gradient(135deg,#0a6e7c 0%,#0f8a9c 55%,#e8a13a 100%);
  --gradient-soft:linear-gradient(135deg,rgba(10,110,124,.08) 0%,rgba(232,161,58,.10) 100%);
}

body.dark{
  --bg:#0f1416;
  --bg-soft:#161d20;
  --text:#e8eef0;
  --muted:#9fb0b4;
  --card:#1a2225;
  --card-glass:rgba(26,34,37,.72);
  --line:#2c3538;
  --shadow-sm:0 2px 10px rgba(0,0,0,.25);
  --shadow-md:0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 20px 50px rgba(0,0,0,.45);
  --gradient-soft:linear-gradient(135deg,rgba(15,138,156,.14) 0%,rgba(232,161,58,.10) 100%);
}

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

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

body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  transition:background .35s var(--ease),color .35s var(--ease);
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  background:
    radial-gradient(900px 500px at 8% -6%,rgba(10,110,124,.10),transparent 60%),
    radial-gradient(800px 460px at 96% 4%,rgba(232,161,58,.10),transparent 60%);
  pointer-events:none;
  transition:opacity .35s var(--ease);
}

body.dark::before{
  background:
    radial-gradient(900px 500px at 8% -6%,rgba(15,138,156,.20),transparent 60%),
    radial-gradient(800px 460px at 96% 4%,rgba(232,161,58,.12),transparent 60%);
}

a{
  color:var(--brand);
  text-decoration:none;
  transition:color .25s var(--ease),opacity .25s var(--ease);
}

a:hover{
  color:var(--brand-3);
  text-decoration:underline;
  text-underline-offset:3px;
}

body.dark a{
  color:#5fc6d6;
}

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

h1,h2,h3,h4{
  line-height:1.4;
  letter-spacing:.2px;
}

p{
  margin-bottom:0;
}

ul{
  list-style:none;
}

.container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px;
}

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

.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:var(--header-h);
  padding:10px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:20px;
  color:var(--brand);
  letter-spacing:.5px;
  flex:none;
}

body.dark .brand{
  color:#7ad8e6;
}

.brand:hover{
  text-decoration:none;
  color:var(--brand);
  opacity:.9;
}

.brand svg{
  width:38px;
  height:38px;
  border-radius:50%;
  box-shadow:0 4px 14px rgba(10,110,124,.28);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}

.brand:hover svg{
  transform:rotate(-12deg) scale(1.06);
  box-shadow:0 8px 22px rgba(10,110,124,.38);
}

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

nav.main-nav a{
  display:inline-block;
  color:var(--text);
  font-size:15px;
  padding:6px 10px;
  border-radius:10px;
  position:relative;
  transition:color .25s var(--ease),background .25s var(--ease);
}

nav.main-nav a:hover{
  color:var(--brand);
  background:var(--gradient-soft);
  text-decoration:none;
}

body.dark nav.main-nav a:hover{
  color:#7ad8e6;
}

nav.main-nav a::after{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--gradient-brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}

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

.nav-tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}

.search-box{
  display:flex;
  align-items:center;
  gap:6px;
  border:1px solid var(--line);
  border-radius:999px;
  padding:4px 4px 4px 14px;
  background:var(--bg-soft);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}

.search-box:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(10,110,124,.12);
}

.search-box input{
  border:none;
  background:transparent;
  outline:none;
  color:var(--text);
  width:120px;
  font-size:14px;
  font-family:inherit;
}

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

.search-box button{
  border:none;
  background:var(--gradient-brand);
  color:#fff;
  border-radius:999px;
  padding:5px 14px;
  cursor:pointer;
  font-size:13px;
  font-family:inherit;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s var(--ease);
}

.search-box button:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(10,110,124,.30);
  filter:brightness(1.05);
}

.icon-btn{
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:50%;
  width:38px;
  height:38px;
  cursor:pointer;
  color:var(--text);
  font-size:16px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:transform .35s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}

.icon-btn:hover{
  transform:rotate(-18deg) scale(1.08);
  border-color:var(--brand);
  color:var(--brand);
}

.menu-toggle{
  display:none;
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:10px;
  padding:6px 12px;
  cursor:pointer;
  color:var(--text);
  font-size:18px;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}

.menu-toggle:hover{
  border-color:var(--brand);
  color:var(--brand);
}

/* ===== Breadcrumb & anchor nav ===== */
.breadcrumb{
  font-size:13px;
  color:var(--muted);
  padding:16px 0 6px;
  display:flex;
  flex-wrap:wrap;
  gap:4px;
  align-items:center;
}

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

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

.breadcrumb span{
  color:var(--brand);
  font-weight:600;
}

.anchor-nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
  padding-bottom:6px;
}

.anchor-nav a{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 14px;
  font-size:14px;
  color:var(--text);
  box-shadow:var(--shadow-sm);
  transition:border-color .25s var(--ease),color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease);
}

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

/* ===== Sections ===== */
section{
  padding:52px 0;
  position:relative;
}

section[style*="background:var(--card)"]{
  background:var(--card) !important;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

.section-title{
  font-size:27px;
  margin-bottom:8px;
  color:var(--brand);
  position:relative;
  padding-left:16px;
}

body.dark .section-title{
  color:#7ad8e6;
}

.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.18em;
  width:5px;
  border-radius:4px;
  background:var(--gradient-brand);
}

.section-sub{
  color:var(--muted);
  margin-bottom:26px;
  font-size:15px;
}

section h3{
  font-size:19px;
  color:var(--text);
  margin:22px 0 10px;
}

section h4{
  font-size:16px;
  color:var(--brand);
  margin-bottom:4px;
}

body.dark section h4{
  color:#7ad8e6;
}

section p{
  color:var(--muted);
  font-size:15.5px;
  margin-bottom:12px;
}

/* ===== Hero ===== */
.hero{
  background:var(--gradient-brand);
  color:#fff;
  padding:72px 0 64px;
  overflow:hidden;
  position:relative;
  isolation:isolate;
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:
    radial-gradient(600px 320px at 12% 0%,rgba(255,255,255,.22),transparent 62%),
    radial-gradient(520px 300px at 88% 100%,rgba(232,161,58,.36),transparent 60%);
  animation:heroGlow 12s ease-in-out infinite alternate;
}

.hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background-image:
    radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.5;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.8),transparent 85%);
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.8),transparent 85%);
}

@keyframes heroGlow{
  from{transform:translate3d(0,0,0) scale(1);}
  to{transform:translate3d(0,-14px,0) scale(1.04);}
}

.hero h1{
  font-size:36px;
  line-height:1.35;
  margin-bottom:18px;
  text-shadow:0 2px 18px rgba(0,0,0,.18);
  letter-spacing:.5px;
  animation:heroIn .8s var(--ease) both;
}

.hero p{
  color:rgba(255,255,255,.92);
  font-size:17px;
  max-width:840px;
  margin-bottom:24px;
  animation:heroIn .8s .1s var(--ease) both;
}

@keyframes heroIn{
  from{opacity:0;transform:translateY(20px);}
  to{opacity:1;transform:none;}
}

.hero .cta{
  display:inline-block;
  background:#fff;
  color:var(--brand);
  padding:11px 26px;
  border-radius:999px;
  font-weight:600;
  margin-right:12px;
  margin-bottom:10px;
  box-shadow:0 8px 24px rgba(0,0,0,.18);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),color .3s var(--ease);
  animation:heroIn .8s .2s var(--ease) both;
}

.hero .cta:hover{
  text-decoration:none;
  transform:translateY(-3px);
  box-shadow:0 14px 32px rgba(0,0,0,.26);
  background:#fff8ec;
}

.hero .cta.ghost{
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.7);
  color:#fff;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}

.hero .cta.ghost:hover{
  background:rgba(255,255,255,.22);
  color:#fff;
}

/* ===== Carousel ===== */
.carousel{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  margin-top:34px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(14px) saturate(150%);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  box-shadow:0 18px 46px rgba(0,0,0,.20);
  animation:heroIn .8s .3s var(--ease) both;
}

.carousel-track{
  display:flex;
  transition:transform .6s var(--ease);
  will-change:transform;
}

.carousel-slide{
  min-width:100%;
  padding:30px;
  display:flex;
  gap:22px;
  align-items:center;
}

.carousel-slide svg{
  width:120px;
  height:120px;
  flex:none;
  filter:drop-shadow(0 10px 22px rgba(0,0,0,.22));
  transition:transform .5s var(--ease);
}

.carousel-slide:hover svg{
  transform:scale(1.06) rotate(-4deg);
}

.carousel-slide h3{
  color:#fff;
  font-size:20px;
  margin:0 0 6px;
}

.carousel-slide p{
  color:rgba(255,255,255,.88);
  font-size:15px;
  margin:0;
}

.carousel-dots{
  position:absolute;
  bottom:12px;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  gap:8px;
  z-index:2;
}

.carousel-dots button{
  width:10px;
  height:10px;
  border-radius:999px;
  border:none;
  background:rgba(255,255,255,.45);
  cursor:pointer;
  padding:0;
  transition:background .3s var(--ease),width .3s var(--ease);
}

.carousel-dots button:hover{
  background:rgba(255,255,255,.8);
}

.carousel-dots button.active{
  background:#fff;
  width:26px;
}

/* ===== Grid & Cards ===== */
.grid{
  display:grid;
  gap:22px;
}

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

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-sm);
  position:relative;
  overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}

.card::before{
  content:"";
  position:absolute;
  inset:0;
  background:var(--gradient-soft);
  opacity:0;
  transition:opacity .35s var(--ease);
  pointer-events:none;
}

.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(10,110,124,.35);
}

.card:hover::before{
  opacity:1;
}

.card > *{
  position:relative;
  z-index:1;
}

.card h3{
  color:var(--brand);
  font-size:18px;
  margin:0 0 10px;
  transition:color .3s var(--ease);
}

body.dark .card h3{
  color:#7ad8e6;
}

.card p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:8px;
}

.card ul{
  list-style:none;
  margin-top:6px;
}

.card ul li{
  font-size:14.5px;
  color:var(--muted);
  padding:5px 0;
  border-bottom:1px dashed var(--line);
}

.card ul li:last-child{
  border-bottom:none;
}

.card ul li a{
  color:var(--text);
}

.card ul li a:hover{
  color:var(--brand);
}

.card svg{
  width:100%;
  height:auto;
  max-width:88px;
  border-radius:14px;
  margin-bottom:14px;
  box-shadow:0 8px 20px rgba(10,110,124,.14);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}

.card:hover svg{
  transform:translateY(-3px) scale(1.04);
  box-shadow:0 14px 28px rgba(10,110,124,.22);
}

/* ===== Stats ===== */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  text-align:center;
  padding:26px;
  border-radius:var(--radius-lg);
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}

.stat-num{
  font-size:34px;
  font-weight:700;
  color:var(--brand-2);
  line-height:1.2;
  letter-spacing:.5px;
}

.stat-label{
  color:var(--muted);
  font-size:14px;
  margin-top:2px;
}

/* ===== Articles ===== */
.article-list{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:22px;
}

.article-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  position:relative;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}

.article-item::after{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:4px;
  background:var(--gradient-brand);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .35s var(--ease);
}

.article-item:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(10,110,124,.30);
}

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

.article-item h3{
  font-size:17.5px;
  margin:0 0 8px;
  color:var(--text);
  transition:color .3s var(--ease);
}

.article-item:hover h3{
  color:var(--brand);
}

body.dark .article-item:hover h3{
  color:#7ad8e6;
}

.article-meta{
  font-size:13px;
  color:var(--muted);
  margin-bottom:10px;
  display:inline-block;
  padding:2px 10px;
  border-radius:999px;
  background:var(--bg-soft);
  border:1px solid var(--line);
}

.article-item p{
  color:var(--muted);
  font-size:14.5px;
  margin-bottom:12px;
}

.read-more{
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap .3s var(--ease),color .3s var(--ease);
}

.read-more:hover{
  gap:9px;
  text-decoration:none;
}

/* ===== FAQ ===== */
#faqList{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:8px 26px;
  box-shadow:var(--shadow-sm);
}

.faq-item{
  border-bottom:1px solid var(--line);
  padding:16px 0;
  transition:background .3s var(--ease);
}

.faq-item:last-child{
  border-bottom:none;
}

.faq-q{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  cursor:pointer;
  font-weight:600;
  font-size:16px;
  color:var(--text);
  transition:color .3s var(--ease);
  user-select:none;
}

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

body.dark .faq-q:hover{
  color:#7ad8e6;
}

.faq-q span{
  flex:none;
  width:26px;
  height:26px;
  border-radius:50%;
  background:var(--bg-soft);
  border:1px solid var(--line);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  color:var(--brand);
  transition:transform .35s var(--ease),background .35s var(--ease),color .35s var(--ease);
}

.faq-item.open .faq-q span{
  background:var(--gradient-brand);
  color:#fff;
  transform:rotate(180deg);
}

.faq-a{
  display:none;
  color:var(--muted);
  padding-top:12px;
  font-size:15px;
  animation:fadeSlide .35s var(--ease);
}

.faq-item.open .faq-a{
  display:block;
}

@keyframes fadeSlide{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:none;}
}

/* ===== HowTo ===== */
.howto-step{
  display:flex;
  gap:16px;
  margin-bottom:18px;
  padding:16px;
  border-radius:var(--radius);
  background:var(--bg-soft);
  border:1px solid var(--line);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}

.howto-step:hover{
  transform:translateX(4px);
  box-shadow:var(--shadow-md);
  border-color:rgba(10,110,124,.30);
}

.step-num{
  flex:none;
  width:38px;
  height:38px;
  border-radius:50%;
  background:var(--gradient-brand);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  box-shadow:0 6px 16px rgba(10,110,124,.28);
}

.howto-step h4{
  margin-bottom:4px;
}

.howto-step p{
  margin-bottom:0;
  font-size:15px;
}

/* ===== Footer ===== */
footer.site-footer{
  background:linear-gradient(180deg,#0a2a30 0%,#071e23 100%);
  color:#cfe0e3;
  padding:48px 0 22px;
  margin-top:48px;
  position:relative;
  overflow:hidden;
}

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

footer a{
  color:#cfe0e3;
  transition:color .25s var(--ease),padding-left .25s var(--ease);
}

footer a:hover{
  color:#fff;
  text-decoration:none;
  padding-left:4px;
}

.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.5fr;
  gap:28px;
}

.footer-grid h4{
  color:#fff;
  margin-bottom:14px;
  font-size:15px;
  position:relative;
  padding-bottom:8px;
}

.footer-grid h4::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:28px;
  height:2px;
  border-radius:2px;
  background:var(--brand-2);
}

.footer-grid ul{
  list-style:none;
}

.footer-grid li{
  margin-bottom:8px;
  font-size:14px;
  color:#9fc0c5;
}

.footer-grid p{
  color:#9fc0c5;
  font-size:14px;
}

.copyright{
  border-top:1px solid #1d444b;
  margin-top:28px;
  padding-top:18px;
  font-size:13px;
  text-align:center;
  color:#8fb0b6;
}

.copyright p{
  color:#8fb0b6;
  font-size:13px;
}

/* ===== Back to top ===== */
.back-top{
  position:fixed;
  right:22px;
  bottom:26px;
  width:46px;
  height:46px;
  border-radius:50%;
  background:var(--gradient-brand);
  color:#fff;
  border:none;
  cursor:pointer;
  font-size:19px;
  display:none;
  z-index:200;
  box-shadow:0 10px 26px rgba(10,110,124,.36);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}

.back-top:hover{
  transform:translateY(-4px) scale(1.06);
  box-shadow:0 16px 34px rgba(10,110,124,.48);
  filter:brightness(1.08);
}

/* ===== Reveal animation ===== */
.reveal{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}

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

.reveal.visible .card,
.reveal.visible .article-item,
.reveal.visible .howto-step{
  animation:cardIn .6s var(--ease) both;
}

@keyframes cardIn{
  from{opacity:0;transform:translateY(16px);}
  to{opacity:1;transform:none;}
}

/* ===== Focus states ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2px solid var(--brand-2);
  outline-offset:3px;
  border-radius:6px;
}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:22px;}
  .hero h1{font-size:31px;}
}

@media (max-width:900px){
  :root{--header-h:60px;}

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

  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:24px;
  }

  .nav-wrap{
    flex-wrap:wrap;
  }

  nav.main-nav{
    display:none;
    width:100%;
    order:3;
  }

  nav.main-nav.open{
    display:block;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:var(--card-glass);
    border-bottom:1px solid var(--line);
    padding:14px 20px 18px;
    backdrop-filter:blur(18px) saturate(160%);
    -webkit-backdrop-filter:blur(18px) saturate(160%);
    box-shadow:var(--shadow-md);
    animation:fadeSlide .3s var(--ease);
  }

  nav.main-nav.open ul{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }

  nav.main-nav.open a{
    padding:10px 12px;
    border-radius:10px;
    font-size:15px;
  }

  .menu-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    order:2;
  }

  .nav-tools{
    order:3;
    margin-left:auto;
  }

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

  .hero{
    padding:56px 0 48px;
  }

  .hero h1{
    font-size:26px;
  }

  .hero p{
    font-size:15.5px;
  }

  .carousel-slide{
    flex-direction:column;
    text-align:center;
    padding:26px 20px 34px;
  }

  .carousel-slide svg{
    width:96px;
    height:96px;
  }

  .section-title{
    font-size:23px;
  }

  section{
    padding:40px 0;
  }

  #faqList{
    padding:4px 18px;
  }
}

@media (max-width:640px){
  body{font-size:15px;}

  .container{padding:0 16px;}

  .brand{font-size:18px;gap:8px;}
  .brand svg{width:34px;height:34px;}

  .search-box input{width:74px;}
  .search-box{padding-left:10px;}

  .hero h1{font-size:23px;}
  .hero .cta{padding:10px 20px;font-size:14px;margin-right:8px;}

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

  .card{padding:20px;}

  .stats{grid-template-columns:1fr 1fr;gap:14px;padding:20px;}
  .stat-num{font-size:27px;}

  .article-item{padding:20px;}

  .anchor-nav a{font-size:13px;padding:5px 12px;}

  .back-top{right:14px;bottom:16px;width:42px;height:42px;}

  .howto-step{flex-direction:row;padding:14px;gap:12px;}
  .step-num{width:32px;height:32px;font-size:14px;}
}

@media (max-width:380px){
  .search-box{display:none;}
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* ===== Print ===== */
@media print{
  header.site-header,
  .back-top,
  .carousel-dots,
  .anchor-nav,
  .hero .cta{
    display:none !important;
  }
  body{background:#fff;color:#000;}
  .hero{background:#fff;color:#000;}
  .hero h1,.hero p{color:#000;text-shadow:none;}
  .card,.article-item{box-shadow:none;border:1px solid #ccc;}
}