:root{
  --brand:#FF6B35;
  --brand-dark:#E85A26;
  --brand-light:#FFE8DF;
  --accent:#2B3A67;
  --bg:#FFFFFF;
  --bg-soft:#FFF7F3;
  --text:#1F2430;
  --text-soft:#5A6272;
  --border:#F0E4DE;
  --shadow:0 6px 24px rgba(255,107,53,.12);
  --shadow-lg:0 18px 48px rgba(255,107,53,.18);
  --glass:rgba(255,255,255,.62);
  --glass-border:rgba(255,255,255,.55);
  --radius:16px;
  --radius-sm:12px;
  --maxw:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

html[data-theme="dark"]{
  --brand:#FF8A5B;
  --brand-dark:#FF6B35;
  --brand-light:#3A2A24;
  --accent:#9FB4E8;
  --bg:#12151C;
  --bg-soft:#1A1F29;
  --text:#EDEFF3;
  --text-soft:#A7AFBD;
  --border:#2A3140;
  --shadow:0 6px 24px rgba(0,0,0,.45);
  --shadow-lg:0 18px 48px rgba(0,0,0,.6);
  --glass:rgba(26,31,41,.62);
  --glass-border:rgba(255,255,255,.08);
}

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

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

body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  transition:background .4s var(--ease),color .4s var(--ease);
}

a{color:var(--brand-dark);text-decoration:none;transition:color .2s var(--ease)}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}

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

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

.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

section{padding:56px 0}

h1,h2,h3,h4{line-height:1.35;color:var(--text);font-weight:700}
h1{font-size:2rem;letter-spacing:-.01em}
h2{font-size:1.55rem;margin-bottom:8px}
h3{font-size:1.2rem;margin:20px 0 8px}
h4{font-size:1.02rem;margin:14px 0 6px;color:var(--accent)}

p{margin:10px 0;color:var(--text-soft)}
ul,ol{margin:10px 0 10px 22px;color:var(--text-soft)}
li{margin:6px 0}
strong{color:var(--text);font-weight:700}

.section-head{text-align:center;margin-bottom:32px}
.section-head p{max-width:760px;margin:10px auto 0}

.eyebrow{
  display:inline-block;
  background:var(--brand-light);
  color:var(--brand-dark);
  font-size:.8rem;
  font-weight:700;
  padding:4px 14px;
  border-radius:999px;
  letter-spacing:.5px;
  transition:background .3s var(--ease);
}

/* ============ 顶部信息条 ============ */
.topbar{
  background:linear-gradient(90deg,var(--accent),#3B4E85);
  color:#fff;
  font-size:.82rem;
}
html[data-theme="dark"] .topbar{
  background:linear-gradient(90deg,#1A1F29,#2A3140);
}
.topbar .container{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
  padding-top:6px;
  padding-bottom:6px;
}
.topbar a{color:#fff}

/* ============ 吸顶导航 ============ */
header.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--glass);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  backdrop-filter:blur(18px) saturate(160%);
  border-bottom:1px solid var(--glass-border);
  transition:box-shadow .35s var(--ease),background .35s var(--ease);
}
header.site-header.scrolled{
  box-shadow:var(--shadow);
  background:var(--glass);
}

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

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.15rem;
  color:var(--text);
  flex-shrink:0;
}
.brand:hover{text-decoration:none}
.brand svg{transition:transform .4s var(--ease)}
.brand:hover svg{transform:rotate(-8deg) scale(1.06)}
.brand small{
  display:block;
  font-weight:400;
  font-size:.7rem;
  color:var(--text-soft);
  letter-spacing:1px;
}

nav.main-nav ul{
  display:flex;
  gap:4px;
  list-style:none;
  margin:0;
  flex-wrap:wrap;
}
nav.main-nav a{
  display:inline-block;
  padding:8px 12px;
  border-radius:10px;
  color:var(--text);
  font-size:.92rem;
  font-weight:500;
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
nav.main-nav a:hover{
  background:var(--brand-light);
  color:var(--brand-dark);
  text-decoration:none;
  transform:translateY(-1px);
}

.nav-tools{display:flex;align-items:center;gap:8px}

.search-box{
  display:flex;
  align-items:center;
  border:1px solid var(--border);
  border-radius:999px;
  overflow:hidden;
  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 3px rgba(255,107,53,.15);
}
.search-box input{
  border:0;
  background:transparent;
  padding:8px 12px;
  font-size:.88rem;
  color:var(--text);
  width:150px;
  outline:none;
  font-family:inherit;
}
.search-box input::placeholder{color:var(--text-soft)}
.search-box button{
  border:0;
  background:var(--brand);
  color:#fff;
  padding:8px 14px;
  cursor:pointer;
  font-size:.85rem;
  font-family:inherit;
  transition:background .25s var(--ease);
}
.search-box button:hover{background:var(--brand-dark)}

.icon-btn{
  border:1px solid var(--border);
  background:var(--bg-soft);
  color:var(--text);
  width:38px;
  height:38px;
  border-radius:50%;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  transition:transform .3s var(--ease),background .25s var(--ease),border-color .25s var(--ease);
}
.icon-btn:hover{
  transform:translateY(-2px) rotate(8deg);
  border-color:var(--brand);
  background:var(--brand-light);
}
.icon-btn:active{transform:scale(.94)}

.menu-toggle{display:none}

/* ============ Hero 首屏 ============ */
.hero{
  position:relative;
  background:
    radial-gradient(1200px 500px at 85% -10%,rgba(255,107,53,.18),transparent 60%),
    radial-gradient(900px 460px at 0% 110%,rgba(43,58,103,.14),transparent 60%),
    linear-gradient(135deg,var(--bg-soft),var(--bg));
  border-bottom:1px solid var(--border);
  padding:48px 0;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,107,53,.10) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.5;
  pointer-events:none;
  mask-image:linear-gradient(180deg,#000,transparent 85%);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 85%);
}

.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:36px;
  align-items:center;
  position:relative;
  z-index:1;
}
.hero h1{margin:14px 0 12px}
.hero h1 span{color:var(--brand-dark)}
.hero .lead{font-size:1.05rem;color:var(--text-soft)}

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

.btn{
  display:inline-block;
  padding:12px 26px;
  border-radius:999px;
  font-weight:700;
  font-size:.95rem;
  transition:transform .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
  will-change:transform;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;
  box-shadow:var(--shadow);
}
.btn-primary:hover{
  background:linear-gradient(135deg,var(--brand-dark),#C43D0F);
  text-decoration:none;
  transform:translateY(-3px);
  box-shadow:var(--shadow-lg);
}
.btn-primary:active{transform:translateY(-1px) scale(.98)}
.btn-ghost{
  border:1px solid var(--border);
  color:var(--text);
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{
  border-color:var(--brand);
  color:var(--brand-dark);
  text-decoration:none;
  transform:translateY(-3px);
  box-shadow:var(--shadow);
}

.hero-stats{display:flex;gap:28px;margin-top:28px;flex-wrap:wrap}
.stat b{
  display:block;
  font-size:1.6rem;
  color:var(--brand-dark);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stat span{font-size:.82rem;color:var(--text-soft)}

/* ============ 轮播 ============ */
.carousel{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--bg-soft);
  border:1px solid var(--border);
  box-shadow:var(--shadow-lg);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.carousel:hover{transform:translateY(-4px)}

.slides{position:relative;height:320px}
.slide{
  position:absolute;
  inset:0;
  opacity:0;
  transform:scale(1.04);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
  padding:24px;
  color:#fff;
  pointer-events:none;
}
.slide.active{opacity:1;transform:scale(1);pointer-events:auto}
.slide h3{color:#fff;font-size:1.25rem;margin:0 0 6px}
.slide p{color:rgba(255,255,255,.92);font-size:.9rem;margin:0}
.slide::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 35%,rgba(0,0,0,.35));
  pointer-events:none;
}
.slide h3,.slide p{position:relative;z-index:1}

.slide.s1{background:linear-gradient(135deg,#FF6B35,#C43D0F)}
.slide.s2{background:linear-gradient(135deg,#2B3A67,#4A5FA5)}
.slide.s3{background:linear-gradient(135deg,#E85A26,#FF9A6B)}
.slide.s4{background:linear-gradient(135deg,#1F7A5A,#3FB08A)}

.dots{
  position:absolute;
  bottom:14px;
  right:18px;
  display:flex;
  gap:6px;
  z-index:2;
}
.dots button{
  width:9px;
  height:9px;
  border-radius:50%;
  border:0;
  background:rgba(255,255,255,.5);
  cursor:pointer;
  padding:0;
  transition:width .3s var(--ease),background .3s var(--ease);
}
.dots button:hover{background:rgba(255,255,255,.8)}
.dots button.active{background:#fff;width:22px;border-radius:5px}

/* ============ 锚点导航 ============ */
.anchor-nav{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  justify-content:center;
  margin:24px 0 0;
  position:relative;
  z-index:1;
}
.anchor-nav a{
  padding:6px 14px;
  border-radius:999px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--border);
  font-size:.85rem;
  color:var(--text);
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease);
}
.anchor-nav a:hover{
  background:var(--brand-light);
  color:var(--brand-dark);
  border-color:var(--brand-light);
  text-decoration:none;
  transform:translateY(-2px);
}

/* ============ 网格布局 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ============ 卡片 ============ */
.card{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  padding:24px;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
  will-change:transform;
}
.card:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-5px);
  border-color:var(--brand-light);
}
.card .icon{
  width:52px;
  height:52px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--brand-light);
  margin-bottom:14px;
  transition:transform .35s var(--ease),background .35s var(--ease);
}
.card:hover .icon{transform:rotate(-6deg) scale(1.08)}
.card h3{margin-top:0}
.card p{font-size:.94rem}

/* ============ 文章卡片 ============ */
.article-card{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(150%);
  backdrop-filter:blur(14px) saturate(150%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
  display:flex;
  flex-direction:column;
  will-change:transform;
}
.article-card:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-5px);
  border-color:var(--brand-light);
}
.article-thumb{
  height:150px;
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
  overflow:hidden;
  transition:filter .35s var(--ease);
}
.article-thumb svg{
  transition:transform .5s var(--ease);
  position:relative;
  z-index:1;
}
.article-card:hover .article-thumb svg{transform:scale(1.12) rotate(4deg)}
.article-thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(0,0,0,.16));
}

.article-body{
  padding:18px 20px;
  flex:1;
  display:flex;
  flex-direction:column;
}
.article-meta{
  font-size:.78rem;
  color:var(--text-soft);
  display:flex;
  gap:12px;
  margin-bottom:8px;
}
.article-meta span:first-child{
  color:var(--brand-dark);
  font-weight:600;
}
.article-card h3{font-size:1.05rem;margin:0 0 8px;transition:color .25s var(--ease)}
.article-card:hover h3{color:var(--brand-dark)}
.article-card p{font-size:.9rem;flex:1}

.read-more{
  margin-top:12px;
  font-weight:700;
  font-size:.88rem;
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap .25s var(--ease),color .25s var(--ease);
}
.read-more:hover{gap:10px;text-decoration:none}

/* ============ FAQ ============ */
.faq-item{
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  margin-bottom:12px;
  overflow:hidden;
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.faq-item:hover{border-color:var(--brand-light)}
.faq-item.open{
  border-color:var(--brand);
  box-shadow:var(--shadow);
}
.faq-q{
  width:100%;
  text-align:left;
  background:transparent;
  border:0;
  padding:18px 20px;
  font-size:1rem;
  font-weight:700;
  color:var(--text);
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:center;
  font-family:inherit;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.faq-q:hover{color:var(--brand-dark)}
.faq-q .arrow{
  transition:transform .35s var(--ease);
  color:var(--brand-dark);
  flex-shrink:0;
}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s var(--ease),padding .4s var(--ease);
  padding:0 20px;
}
.faq-item.open .faq-a{padding-bottom:18px}
.faq-a p{font-size:.93rem;margin:0}

/* ============ HowTo 步骤 ============ */
.steps{counter-reset:step;display:grid;gap:16px}
.step{
  position:relative;
  padding:20px 20px 20px 68px;
  background:var(--bg-soft);
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.step:hover{
  transform:translateX(4px);
  box-shadow:var(--shadow);
  border-color:var(--brand-light);
}
.step::before{
  counter-increment:step;
  content:counter(step);
  position:absolute;
  left:20px;
  top:20px;
  width:34px;
  height:34px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.95rem;
  box-shadow:0 4px 12px rgba(255,107,53,.35);
  transition:transform .3s var(--ease);
}
.step:hover::before{transform:scale(1.1) rotate(-8deg)}
.step h4{margin:0 0 4px;color:var(--text)}
.step p{margin:0;font-size:.92rem}

/* ============ 案例 ============ */
.case{
  background:var(--bg-soft);
  border-radius:var(--radius);
  padding:24px;
  border-left:4px solid var(--brand);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.case h4{margin-top:0}

.quote{
  font-style:italic;
  color:var(--text-soft);
  border-left:3px solid var(--brand-light);
  padding-left:14px;
  margin:14px 0;
}

/* ============ 表格 ============ */
table{
  width:100%;
  border-collapse:collapse;
  margin:16px 0;
  font-size:.92rem;
  border-radius:var(--radius-sm);
  overflow:hidden;
}
th,td{
  border:1px solid var(--border);
  padding:10px 12px;
  text-align:left;
}
th{
  background:var(--bg-soft);
  color:var(--text);
  font-weight:700;
}
td{color:var(--text-soft);transition:background .25s var(--ease)}
tbody tr:hover td{background:var(--brand-light)}

/* ============ 面包屑 ============ */
.breadcrumb{
  font-size:.85rem;
  color:var(--text-soft);
  padding:14px 0;
}
.breadcrumb a{color:var(--brand-dark)}
.breadcrumb span{margin:0 6px}

/* ============ 联系 ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}

.contact-info{margin:0}
.contact-info li{
  list-style:none;
  margin:12px 0;
  display:flex;
  gap:12px;
  align-items:flex-start;
  transition:transform .25s var(--ease);
}
.contact-info li:hover{transform:translateX(4px)}
.contact-info .ci-icon{
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--brand-light);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  transition:transform .3s var(--ease),background .3s var(--ease);
}
.contact-info li:hover .ci-icon{transform:rotate(-8deg) scale(1.06)}
.contact-info b{display:block;color:var(--text)}
.contact-info span{font-size:.9rem;color:var(--text-soft)}

/* ============ 页脚 ============ */
footer{
  background:linear-gradient(160deg,var(--accent),#1E2A4E);
  color:#DCE2F0;
  padding:48px 0 0;
  margin-top:20px;
  position:relative;
  overflow:hidden;
}
html[data-theme="dark"] footer{
  background:linear-gradient(160deg,#151A24,#0E1117);
}
footer::before{
  content:"";
  position:absolute;
  top:-120px;
  right:-80px;
  width:320px;
  height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,53,.22),transparent 70%);
  pointer-events:none;
}
footer a{color:#DCE2F0;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:1.4fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:32px;
  position:relative;
  z-index:1;
}
footer h4{color:#fff;margin-top:0;font-size:1rem}
footer ul{list-style:none;margin:0}
footer li{margin:8px 0;font-size:.9rem}

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.15);
  padding:18px 0;
  font-size:.82rem;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  position:relative;
  z-index:1;
}

/* ============ 返回顶部 ============ */
#backTop{
  position:fixed;
  right:22px;
  bottom:22px;
  width:48px;
  height:48px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;
  border:0;
  cursor:pointer;
  font-size:1.2rem;
  display:none;
  align-items:center;
  justify-content:center;
  box-shadow:var(--shadow-lg);
  z-index:200;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
#backTop.show{display:flex;animation:popIn .35s var(--ease)}
#backTop:hover{transform:translateY(-4px) scale(1.06)}
#backTop:active{transform:scale(.94)}

@keyframes popIn{
  from{opacity:0;transform:scale(.6)}
  to{opacity:1;transform:scale(1)}
}

/* ============ 滚动动画 ============ */
.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}

/* 交错延迟 */
.grid-3 > .reveal:nth-child(2),
.grid-2 > .reveal:nth-child(2),
.grid-4 > .reveal:nth-child(2){transition-delay:.08s}
.grid-3 > .reveal:nth-child(3),
.grid-4 > .reveal:nth-child(3){transition-delay:.16s}
.grid-4 > .reveal:nth-child(4){transition-delay:.24s}

/* ============ 暗色模式细节 ============ */
html[data-theme="dark"] .slide.s1{background:linear-gradient(135deg,#FF6B35,#8A2A08)}
html[data-theme="dark"] .slide.s2{background:linear-gradient(135deg,#2B3A67,#1A2440)}
html[data-theme="dark"] .slide.s3{background:linear-gradient(135deg,#E85A26,#7A2E0E)}
html[data-theme="dark"] .slide.s4{background:linear-gradient(135deg,#1F7A5A,#0E3A2A)}
html[data-theme="dark"] .card:hover,
html[data-theme="dark"] .article-card:hover{border-color:rgba(255,138,91,.35)}
html[data-theme="dark"] .step{background:var(--bg-soft)}
html[data-theme="dark"] .case{background:var(--bg-soft)}

/* ============ 响应式 ============ */
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
}

@media(max-width:960px){
  .hero-grid,.contact-grid{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .slides{height:280px}

  nav.main-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    background:var(--glass);
    -webkit-backdrop-filter:blur(20px) saturate(160%);
    backdrop-filter:blur(20px) saturate(160%);
    border-bottom:1px solid var(--glass-border);
    padding:12px 20px;
    box-shadow:var(--shadow);
    animation:slideDown .3s var(--ease);
  }
  nav.main-nav.open{display:block}
  nav.main-nav ul{flex-direction:column}
  nav.main-nav a{display:block;padding:10px 14px}

  .menu-toggle{display:flex}
  .search-box input{width:110px}
}

@keyframes slideDown{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:none}
}

@media(max-width:600px){
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  h1{font-size:1.55rem}
  h2{font-size:1.32rem}
  section{padding:40px 0}
  .hero{padding:32px 0}
  .hero-stats{gap:18px}
  .hero-stats .stat b{font-size:1.35rem}
  .search-box{display:none}
  .slides{height:240px}
  .slide{padding:18px}
  .slide h3{font-size:1.1rem}
  .slide p{font-size:.85rem}
  .card,.case{padding:20px}
  .step{padding:18px 18px 18px 60px}
  .step::before{left:16px;top:18px;width:30px;height:30px;font-size:.85rem}
  .footer-bottom{flex-direction:column;text-align:center;align-items:center}
  #backTop{right:16px;bottom:16px;width:44px;height:44px}
  .article-thumb{height:130px}
}

@media(max-width:380px){
  .container{padding:0 14px}
  .brand{font-size:1rem}
  .brand small{font-size:.62rem}
}

/* ============ 无障碍与动效偏好 ============ */
@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}
}

/* ============ 打印 ============ */
@media print{
  header.site-header,.topbar,footer,#backTop,.carousel,.hero-actions,.anchor-nav,.search-box,.icon-btn{display:none !important}
  body{background:#fff;color:#000}
  .card,.article-card,.faq-item,.step,.case{border:1px solid #ccc;box-shadow:none;background:#fff}
  a{color:#000;text-decoration:underline}
  section{padding:16px 0}
}