:root{
  --primary:#1a5f7a;
  --primary-light:#2d8ea8;
  --primary-dark:#134a5f;
  --accent:#e8734a;
  --accent-light:#f0906e;
  --bg:#f7f9fc;
  --bg-alt:#eef3f8;
  --card-bg:rgba(255,255,255,.78);
  --card-solid:#ffffff;
  --text:#2c3e50;
  --text-secondary:#4a5568;
  --text-muted:#7b8794;
  --border:#d9e2ec;
  --border-light:#e2e8f0;
  --shadow-sm:0 2px 12px rgba(26,95,122,.07);
  --shadow-md:0 6px 24px rgba(26,95,122,.10);
  --shadow-lg:0 12px 40px rgba(26,95,122,.14);
  --shadow-glow:0 4px 20px rgba(45,142,168,.35);
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-pill:999px;
  --glass-bg:rgba(255,255,255,.55);
  --glass-border:rgba(255,255,255,.65);
  --gradient-primary:linear-gradient(135deg,#1a5f7a 0%,#2d8ea8 55%,#3aa8c4 100%);
  --gradient-accent:linear-gradient(135deg,#e8734a,#f0906e);
  --gradient-banner:linear-gradient(135deg,#0f3a4d 0%,#1a5f7a 30%,#2d8ea8 65%,#3aa8c4 100%);
  --gradient-mesh:radial-gradient(circle at 20% 20%,rgba(45,142,168,.35),transparent 50%),radial-gradient(circle at 80% 70%,rgba(232,115,74,.18),transparent 50%),radial-gradient(circle at 50% 100%,rgba(58,168,196,.25),transparent 45%);
  --header-h:68px;
  --transition-fast:.2s cubic-bezier(.4,0,.2,1);
  --transition-base:.3s cubic-bezier(.4,0,.2,1);
  --transition-slow:.6s cubic-bezier(.4,0,.2,1);
}

body.dark{
  --primary:#4db8d4;
  --primary-light:#5ec8e0;
  --primary-dark:#3a9ab4;
  --accent:#f0906e;
  --accent-light:#f5a88c;
  --bg:#0f1a24;
  --bg-alt:#142230;
  --card-bg:rgba(22,34,46,.72);
  --card-solid:#16222e;
  --text:#c9d6e0;
  --text-secondary:#a0aec0;
  --text-muted:#7b8794;
  --border:#2d3e50;
  --border-light:#243545;
  --shadow-sm:0 2px 12px rgba(0,0,0,.35);
  --shadow-md:0 6px 24px rgba(0,0,0,.45);
  --shadow-lg:0 12px 40px rgba(0,0,0,.55);
  --shadow-glow:0 4px 20px rgba(77,184,212,.3);
  --glass-bg:rgba(22,34,46,.6);
  --glass-border:rgba(77,184,212,.12);
  --gradient-primary:linear-gradient(135deg,#134a5f 0%,#1a5f7a 50%,#2d8ea8 100%);
  --gradient-banner:linear-gradient(135deg,#08141c 0%,#0f2a38 30%,#134a5f 65%,#1a5f7a 100%);
  --gradient-mesh:radial-gradient(circle at 20% 20%,rgba(45,142,168,.25),transparent 50%),radial-gradient(circle at 80% 70%,rgba(232,115,74,.12),transparent 50%),radial-gradient(circle at 50% 100%,rgba(58,168,196,.18),transparent 45%);
}

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

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

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  background-image:var(--gradient-mesh);
  background-attachment:fixed;
  transition:background-color var(--transition-base),color var(--transition-base);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

a{
  text-decoration:none;
  color:var(--primary);
  transition:color var(--transition-fast),opacity var(--transition-fast);
}

a:hover{
  color:var(--primary-light);
}

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

ul,ol{
  list-style:none;
}

button{
  font-family:inherit;
  cursor:pointer;
}

input,textarea,select{
  font-family:inherit;
}

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

::-webkit-scrollbar{
  width:8px;
  height:8px;
}

::-webkit-scrollbar-track{
  background:var(--bg-alt);
}

::-webkit-scrollbar-thumb{
  background:var(--primary-light);
  border-radius:var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover{
  background:var(--primary);
}

.header{
  position:sticky;
  top:0;
  z-index:1000;
  background:var(--glass-bg);
  backdrop-filter:blur(18px) saturate(180%);
  -webkit-backdrop-filter:blur(18px) saturate(180%);
  border-bottom:1px solid var(--glass-border);
  box-shadow:var(--shadow-sm);
  transition:background-color var(--transition-base),box-shadow var(--transition-base),border-color var(--transition-base);
}

.header-inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:var(--header-h);
  gap:16px;
}

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:22px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:-.3px;
  flex-shrink:0;
  transition:transform var(--transition-fast),opacity var(--transition-fast);
}

.logo:hover{
  transform:translateY(-1px);
  opacity:.92;
}

.logo svg{
  width:32px;
  height:32px;
  border-radius:8px;
  box-shadow:var(--shadow-glow);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
}

.logo:hover svg{
  transform:rotate(-6deg) scale(1.06);
  box-shadow:0 6px 24px rgba(45,142,168,.5);
}

.logo span{
  background:var(--gradient-primary);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}

.nav{
  display:flex;
  gap:24px;
  font-size:15px;
  align-items:center;
}

.nav a{
  color:var(--text);
  position:relative;
  padding:6px 0;
  font-weight:500;
  transition:color var(--transition-fast);
}

.nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  background:var(--gradient-primary);
  border-radius:2px;
  transition:width var(--transition-base);
}

.nav a:hover{
  color:var(--primary);
}

.nav a:hover::after{
  width:100%;
}

.header-actions{
  display:flex;
  gap:12px;
  align-items:center;
  flex-shrink:0;
}

.search-box{
  display:flex;
  align-items:center;
  border:1px solid var(--border);
  border-radius:var(--radius-pill);
  padding:4px 12px;
  background:var(--card-bg);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:border-color var(--transition-base),box-shadow var(--transition-base),background-color var(--transition-base);
}

.search-box:focus-within{
  border-color:var(--primary-light);
  box-shadow:0 0 0 3px rgba(45,142,168,.15);
}

.search-box input{
  border:none;
  outline:none;
  background:transparent;
  font-size:14px;
  width:140px;
  color:var(--text);
  transition:width var(--transition-base);
}

.search-box input:focus{
  width:180px;
}

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

.search-box button{
  border:none;
  background:transparent;
  cursor:pointer;
  color:var(--primary);
  font-size:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:4px;
  border-radius:50%;
  transition:background-color var(--transition-fast),transform var(--transition-fast);
}

.search-box button:hover{
  background:rgba(45,142,168,.12);
  transform:scale(1.1);
}

.theme-toggle{
  border:1px solid var(--border);
  background:var(--card-bg);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-radius:50%;
  width:36px;
  height:36px;
  cursor:pointer;
  font-size:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-color var(--transition-base),background-color var(--transition-base);
}

.theme-toggle:hover{
  transform:rotate(20deg) scale(1.08);
  box-shadow:var(--shadow-glow);
  border-color:var(--primary-light);
}

.mobile-menu-btn{
  display:none;
  border:none;
  background:transparent;
  font-size:24px;
  cursor:pointer;
  color:var(--primary);
  padding:4px 8px;
  border-radius:var(--radius-sm);
  transition:background-color var(--transition-fast),transform var(--transition-fast);
}

.mobile-menu-btn:hover{
  background:rgba(45,142,168,.1);
}

.breadcrumb{
  max-width:1200px;
  margin:16px auto 0;
  padding:0 20px;
  font-size:13px;
  color:var(--text-muted);
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:2px;
}

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

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

.breadcrumb span{
  margin:0 6px;
}

.banner{
  max-width:1200px;
  margin:20px auto;
  padding:0 20px;
}

.banner-slider{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--gradient-banner);
  color:#fff;
  min-height:360px;
  box-shadow:var(--shadow-lg);
  isolation:isolate;
}

.banner-slider::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 75% 25%,rgba(255,255,255,.12),transparent 45%),
    radial-gradient(circle at 15% 85%,rgba(232,115,74,.15),transparent 40%);
  pointer-events:none;
  z-index:1;
}

.banner-slider::after{
  content:"";
  position:absolute;
  top:-50%;
  right:-10%;
  width:60%;
  height:200%;
  background:linear-gradient(105deg,transparent 40%,rgba(255,255,255,.06) 50%,transparent 60%);
  transform:rotate(15deg);
  pointer-events:none;
  z-index:1;
}

.slide{
  display:none;
  padding:60px 48px;
  min-height:360px;
  flex-direction:column;
  justify-content:center;
  position:relative;
  z-index:2;
}

.slide.active{
  display:flex;
  animation:slideFadeIn .7s cubic-bezier(.4,0,.2,1);
}

@keyframes slideFadeIn{
  from{
    opacity:0;
    transform:translateY(16px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

.slide h2{
  font-size:34px;
  margin-bottom:16px;
  line-height:1.3;
  font-weight:800;
  letter-spacing:-.5px;
  text-shadow:0 2px 12px rgba(0,0,0,.15);
}

.slide p{
  font-size:17px;
  opacity:.95;
  max-width:640px;
  margin-bottom:24px;
  line-height:1.85;
  text-shadow:0 1px 6px rgba(0,0,0,.1);
}

.slide .btn{
  display:inline-block;
  background:rgba(255,255,255,.95);
  color:var(--primary);
  padding:12px 32px;
  border-radius:var(--radius-pill);
  font-weight:700;
  align-self:flex-start;
  box-shadow:0 4px 16px rgba(0,0,0,.15);
  transition:transform var(--transition-base),box-shadow var(--transition-base),background-color var(--transition-base);
  position:relative;
  overflow:hidden;
}

.slide .btn::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(45,142,168,.15),transparent);
  opacity:0;
  transition:opacity var(--transition-base);
}

.slide .btn:hover{
  transform:translateY(-3px) scale(1.03);
  box-shadow:0 8px 28px rgba(0,0,0,.25);
  background:#fff;
  color:var(--primary-dark);
}

.slide .btn:hover::before{
  opacity:1;
}

.slider-dots{
  position:absolute;
  bottom:20px;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  gap:10px;
  z-index:3;
}

.slider-dots span{
  width:10px;
  height:10px;
  border-radius:50%;
  background:rgba(255,255,255,.5);
  cursor:pointer;
  transition:all var(--transition-base);
}

.slider-dots span:hover{
  background:rgba(255,255,255,.8);
  transform:scale(1.2);
}

.slider-dots span.active{
  background:#fff;
  width:24px;
  border-radius:5px;
  box-shadow:0 0 12px rgba(255,255,255,.5);
}

.section{
  max-width:1200px;
  margin:0 auto;
  padding:48px 20px;
}

.section-title{
  font-size:26px;
  color:var(--primary);
  margin-bottom:8px;
  position:relative;
  padding-left:16px;
  font-weight:800;
  letter-spacing:-.3px;
}

.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  bottom:8px;
  width:4px;
  background:var(--gradient-primary);
  border-radius:2px;
  box-shadow:0 0 12px rgba(45,142,168,.4);
}

.section-sub{
  color:var(--text-muted);
  font-size:14px;
  margin-bottom:28px;
  padding-left:16px;
}

.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-bottom:20px;
}

.stat-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:28px 20px;
  text-align:center;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-color var(--transition-base);
  position:relative;
  overflow:hidden;
}

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

.stat-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
  border-color:var(--primary-light);
}

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

.stat-num{
  font-size:34px;
  font-weight:800;
  color:var(--primary);
  letter-spacing:-1px;
  line-height:1.2;
}

.stat-label{
  color:var(--text-muted);
  font-size:14px;
  margin-top:6px;
}

.about-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:32px;
  align-items:start;
}

.about-text p{
  margin-bottom:14px;
  color:var(--text-secondary);
  line-height:1.9;
}

.about-text p:last-child{
  margin-bottom:0;
}

.about-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
  position:sticky;
  top:calc(var(--header-h) + 20px);
}

.about-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}

.about-card h3{
  color:var(--primary);
  margin-bottom:12px;
  font-size:18px;
  font-weight:700;
}

.about-card ul{
  list-style:none;
}

.about-card li{
  padding:8px 0;
  border-bottom:1px dashed var(--border-light);
  font-size:14px;
  color:var(--text-secondary);
  transition:padding-left var(--transition-fast),color var(--transition-fast);
}

.about-card li:hover{
  padding-left:6px;
  color:var(--primary);
}

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

.about-card li strong{
  color:var(--text);
}

.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}

.feature-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:28px 24px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-color var(--transition-base);
  position:relative;
  overflow:hidden;
}

.feature-card::after{
  content:"";
  position:absolute;
  top:-60%;
  right:-60%;
  width:120%;
  height:120%;
  background:radial-gradient(circle,rgba(45,142,168,.08),transparent 60%);
  opacity:0;
  transition:opacity var(--transition-slow);
  pointer-events:none;
}

.feature-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
  border-color:var(--primary-light);
}

.feature-card:hover::after{
  opacity:1;
}

.feature-card h3{
  color:var(--primary);
  font-size:18px;
  margin-bottom:10px;
  font-weight:700;
  position:relative;
  z-index:1;
}

.feature-card p{
  font-size:14px;
  color:var(--text-secondary);
  position:relative;
  z-index:1;
  line-height:1.85;
}

.solution-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}

.solution-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
  border-left:4px solid var(--primary-light);
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-left-color var(--transition-base);
  position:relative;
  overflow:hidden;
}

.solution-card::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:4px;
  background:var(--gradient-accent);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform var(--transition-base);
}

.solution-card:hover{
  transform:translateY(-4px) translateX(4px);
  box-shadow:var(--shadow-md);
}

.solution-card:hover::before{
  transform:scaleY(1);
}

.solution-card h3{
  color:var(--primary);
  font-size:17px;
  margin-bottom:8px;
  font-weight:700;
}

.solution-card p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.85;
}

.case-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}

.case-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
}

.case-card:hover{
  transform:translateY(-6px) scale(1.01);
  box-shadow:var(--shadow-lg);
}

.case-body{
  padding:20px;
}

.case-body h3{
  color:var(--primary);
  font-size:16px;
  margin-bottom:8px;
  font-weight:700;
}

.case-body p{
  font-size:13px;
  color:var(--text-secondary);
  line-height:1.8;
}

.case-tag{
  display:inline-block;
  background:linear-gradient(135deg,rgba(45,142,168,.15),rgba(58,168,196,.1));
  color:var(--primary);
  font-size:12px;
  padding:2px 10px;
  border-radius:var(--radius-pill);
  margin-bottom:8px;
  font-weight:600;
  border:1px solid rgba(45,142,168,.15);
  transition:transform var(--transition-fast),box-shadow var(--transition-fast);
}

.case-card:hover .case-tag{
  transform:translateY(-2px);
  box-shadow:0 2px 8px rgba(45,142,168,.2);
}

.testimonial-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}

.testimonial-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
  position:relative;
}

.testimonial-card::before{
  content:"\201C";
  position:absolute;
  top:8px;
  right:20px;
  font-size:48px;
  line-height:1;
  color:var(--primary-light);
  opacity:.15;
  font-family:Georgia,serif;
  pointer-events:none;
}

.testimonial-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}

.testimonial-card p{
  font-size:14px;
  color:var(--text-secondary);
  font-style:italic;
  margin-bottom:14px;
  line-height:1.85;
  position:relative;
  z-index:1;
}

.testimonial-author{
  display:flex;
  align-items:center;
  gap:10px;
}

.testimonial-avatar{
  width:40px;
  height:40px;
  border-radius:50%;
  background:var(--gradient-primary);
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-weight:700;
  font-size:14px;
  flex-shrink:0;
  box-shadow:var(--shadow-glow);
  transition:transform var(--transition-base);
}

.testimonial-card:hover .testimonial-avatar{
  transform:scale(1.1) rotate(-5deg);
}

.testimonial-name{
  font-size:14px;
  font-weight:600;
  color:var(--text);
}

.testimonial-role{
  font-size:12px;
  color:var(--text-muted);
}

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

.article-card{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-color var(--transition-base);
  position:relative;
  overflow:hidden;
}

.article-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:3px;
  background:var(--gradient-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--transition-base);
}

.article-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-lg);
  border-color:var(--primary-light);
}

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

.article-card h3{
  color:var(--primary);
  font-size:17px;
  margin-bottom:8px;
  font-weight:700;
  line-height:1.5;
  transition:color var(--transition-fast);
}

.article-card:hover h3{
  color:var(--primary-light);
}

.article-meta{
  font-size:12px;
  color:var(--text-muted);
  margin-bottom:10px;
}

.article-card p{
  font-size:14px;
  color:var(--text-secondary);
  margin-bottom:12px;
  line-height:1.85;
}

.article-link{
  font-size:14px;
  color:var(--primary-light);
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap var(--transition-fast),color var(--transition-fast);
}

.article-link:hover{
  gap:8px;
  color:var(--primary);
}

.faq-list{
  max-width:900px;
  margin:0 auto;
}

.faq-item{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-sm);
  margin-bottom:12px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:box-shadow var(--transition-base),border-color var(--transition-base),transform var(--transition-base);
}

.faq-item:hover{
  box-shadow:var(--shadow-md);
  border-color:var(--primary-light);
}

.faq-item.open{
  border-color:var(--primary-light);
  box-shadow:var(--shadow-md);
}

.faq-question{
  padding:18px 24px;
  cursor:pointer;
  font-weight:600;
  color:var(--text);
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:15px;
  gap:12px;
  transition:color var(--transition-fast),background-color var(--transition-fast);
  user-select:none;
}

.faq-question:hover{
  color:var(--primary);
  background:rgba(45,142,168,.04);
}

.faq-question::after{
  content:"+";
  font-size:20px;
  color:var(--primary);
  transition:transform var(--transition-base),color var(--transition-base);
  flex-shrink:0;
  line-height:1;
}

.faq-item.open .faq-question::after{
  transform:rotate(45deg);
  color:var(--accent);
}

.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease,padding var(--transition-base);
  padding:0 24px;
  color:var(--text-secondary);
  font-size:14px;
  line-height:1.9;
}

.faq-item.open .faq-answer{
  max-height:400px;
  padding-bottom:18px;
}

.howto-steps{
  display:grid;
  gap:20px;
  max-width:900px;
  margin:0 auto;
}

.howto-step{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
  display:flex;
  gap:20px;
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-color var(--transition-base);
}

.howto-step:hover{
  transform:translateX(6px);
  box-shadow:var(--shadow-md);
  border-color:var(--primary-light);
}

.howto-num{
  flex-shrink:0;
  width:44px;
  height:44px;
  border-radius:50%;
  background:var(--gradient-primary);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:18px;
  box-shadow:var(--shadow-glow);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
}

.howto-step:hover .howto-num{
  transform:scale(1.12) rotate(-8deg);
  box-shadow:0 6px 24px rgba(45,142,168,.5);
}

.howto-content h3{
  color:var(--primary);
  font-size:16px;
  margin-bottom:6px;
  font-weight:700;
}

.howto-content p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.85;
}

.news-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}

.news-item{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-sm);
  padding:20px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base),border-left-color var(--transition-base);
  border-left:3px solid transparent;
  position:relative;
}

.news-item:hover{
  transform:translateX(4px);
  box-shadow:var(--shadow-md);
  border-left-color:var(--primary-light);
}

.news-item h3{
  font-size:15px;
  color:var(--primary);
  margin-bottom:6px;
  font-weight:600;
  line-height:1.6;
  transition:color var(--transition-fast);
}

.news-item:hover h3{
  color:var(--primary-light);
}

.news-date{
  font-size:12px;
  color:var(--text-muted);
  display:flex;
  align-items:center;
  gap:4px;
}

.news-date::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent);
  display:inline-block;
  flex-shrink:0;
}

.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
}

.contact-info{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:28px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
}

.contact-info:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}

.contact-info h3{
  color:var(--primary);
  margin-bottom:16px;
  font-size:18px;
  font-weight:700;
}

.contact-info p{
  margin-bottom:10px;
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.85;
}

.contact-info strong{
  color:var(--text);
}

.contact-form{
  background:var(--card-bg);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  padding:28px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--transition-base),box-shadow var(--transition-base);
}

.contact-form:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}

.contact-form h3{
  color:var(--primary);
  margin-bottom:16px;
  font-size:18px;
  font-weight:700;
}

.form-group{
  margin-bottom:16px;
}

.form-group label{
  display:block;
  font-size:14px;
  margin-bottom:6px;
  color:var(--text);
  font-weight:500;
}

.form-group input,
.form-group textarea{
  width:100%;
  padding:10px 14px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  font-size:14px;
  font-family:inherit;
  outline:none;
  transition:border-color var(--transition-base),box-shadow var(--transition-base),background-color var(--transition-base);
  background:var(--card-bg);
  color:var(--text);
}

.form-group input::placeholder,
.form-group textarea::placeholder{
  color:var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus{
  border-color:var(--primary-light);
  box-shadow:0 0 0 3px rgba(45,142,168,.15);
}

.form-group textarea{
  resize:vertical;
  min-height:100px;
  line-height:1.8;
}

.form-btn{
  background:var(--gradient-primary);
  color:#fff;
  border:none;
  padding:12px 32px;
  border-radius:var(--radius-pill);
  font-size:15px;
  cursor:pointer;
  font-weight:700;
  box-shadow:var(--shadow-glow);
  transition:transform var(--transition-base),box-shadow var(--transition-base),filter var(--transition-base);
  position:relative;
  overflow:hidden;
}

.form-btn::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,.2),transparent);
  opacity:0;
  transition:opacity var(--transition-base);
}

.form-btn:hover{
  transform:translateY(-3px);
  box-shadow:0 8px 28px rgba(45,142,168,.5);
  filter:brightness(1.05);
}

.form-btn:hover::before{
  opacity:1;
}

.form-btn:active{
  transform:translateY(-1px);
}

.footer{
  background:linear-gradient(180deg,#1a2b3c,#12202e);
  color:#a0aec0;
  padding:48px 20px 24px;
  margin-top:48px;
  position:relative;
  overflow:hidden;
}

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

.footer-inner{
  max-width:1200px;
  margin:0 auto;
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:32px;
}

.footer h4{
  color:#fff;
  font-size:16px;
  margin-bottom:16px;
  font-weight:700;
  position:relative;
  padding-bottom:8px;
}

.footer h4::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:24px;
  height:2px;
  background:var(--gradient-primary);
  border-radius:2px;
}

.footer p,
.footer li{
  font-size:13px;
  line-height:2;
}

.footer ul{
  list-style:none;
}

.footer a{
  color:#a0aec0;
  transition:color var(--transition-fast),padding-left var(--transition-fast);
  display:inline-block;
}

.footer a:hover{
  color:#fff;
  padding-left:4px;
}

.footer-bottom{
  max-width:1200px;
  margin:32px auto 0;
  padding-top:20px;
  border-top:1px solid #2d3e50;
  text-align:center;
  font-size:12px;
  color:#7b8794;
  line-height:1.9;
}

.footer-bottom a{
  color:#7b8794;
}

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

.back-to-top{
  position:fixed;
  bottom:30px;
  right:30px;
  width:48px;
  height:48px;
  border-radius:50%;
  background:var(--gradient-primary);
  color:#fff;
  border:none;
  cursor:pointer;
  font-size:20px;
  display:none;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 16px rgba(26,95,122,.4);
  z-index:999;
  transition:transform var(--transition-base),box-shadow var(--transition-base),opacity var(--transition-base);
}

.back-to-top.show{
  display:flex;
  animation:backToTopIn .4s cubic-bezier(.4,0,.2,1);
}

@keyframes backToTopIn{
  from{
    opacity:0;
    transform:translateY(16px) scale(.8);
  }
  to{
    opacity:1;
    transform:translateY(0) scale(1);
  }
}

.back-to-top:hover{
  transform:translateY(-4px) scale(1.08);
  box-shadow:0 8px 28px rgba(45,142,168,.55);
}

.back-to-top:active{
  transform:translateY(-2px) scale(1.02);
}

.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .6s cubic-bezier(.4,0,.2,1),transform .6s cubic-bezier(.4,0,.2,1);
}

.reveal.visible{
  opacity:1;
  transform:translateY(0);
}

.reveal:nth-child(2){transition-delay:.05s}
.reveal:nth-child(3){transition-delay:.1s}
.reveal:nth-child(4){transition-delay:.15s}
.reveal:nth-child(5){transition-delay:.2s}
.reveal:nth-child(6){transition-delay:.25s}

body.dark .header{
  background:rgba(22,34,46,.72);
  box-shadow:0 2px 12px rgba(0,0,0,.4);
}

body.dark .nav a{
  color:var(--text);
}

body.dark .nav a:hover{
  color:var(--primary);
}

body.dark .search-box{
  background:rgba(30,45,58,.7);
  border-color:var(--border);
}

body.dark .search-box input{
  color:var(--text);
}

body.dark .theme-toggle{
  background:rgba(30,45,58,.7);
  border-color:var(--border);
  color:var(--text);
}

body.dark .stat-card,
body.dark .about-card,
body.dark .feature-card,
body.dark .solution-card,
body.dark .case-card,
body.dark .testimonial-card,
body.dark .article-card,
body.dark .faq-item,
body.dark .howto-step,
body.dark .news-item,
body.dark .contact-info,
body.dark .contact-form{
  background:rgba(22,34,46,.72);
  box-shadow:0 2px 12px rgba(0,0,0,.3);
}

body.dark .stat-label,
body.dark .section-sub,
body.dark .article-meta,
body.dark .news-date,
body.dark .testimonial-role{
  color:var(--text-muted);
}

body.dark .about-text p,
body.dark .about-card li,
body.dark .feature-card p,
body.dark .solution-card p,
body.dark .case-body p,
body.dark .testimonial-card p,
body.dark .article-card p,
body.dark .faq-answer,
body.dark .howto-content p,
body.dark .contact-info p{
  color:var(--text-secondary);
}

body.dark .faq-question{
  color:var(--text);
}

body.dark .form-group input,
body.dark .form-group textarea{
  background:rgba(30,45,58,.7);
  border-color:var(--border);
  color:var(--text);
}

body.dark .footer{
  background:linear-gradient(180deg,#0d1820,#08141c);
}

body.dark .about-card{
  border-color:var(--border);
}

body.dark .banner-slider{
  box-shadow:0 12px 40px rgba(0,0,0,.5);
}

@media(max-width:1024px){
  .feature-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .case-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .testimonial-grid{
    grid-template-columns:repeat(2,1fr);
  }
}

@media(max-width:900px){
  .nav{
    display:none;
  }

  .nav.open{
    display:flex;
    flex-direction:column;
    position:absolute;
    top:var(--header-h);
    left:0;
    right:0;
    background:var(--card-solid);
    padding:20px;
    box-shadow:0 8px 20px rgba(0,0,0,.1);
    gap:16px;
    animation:navSlideDown .3s cubic-bezier(.4,0,.2,1);
    border-bottom:1px solid var(--border-light);
  }

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

  .nav.open a{
    padding:10px 0;
    border-bottom:1px solid var(--border-light);
  }

  .nav.open a:last-child{
    border-bottom:none;
  }

  body.dark .nav.open{
    background:var(--card-solid);
  }

  .mobile-menu-btn{
    display:block;
  }

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

  .about-grid,
  .feature-grid,
  .solution-grid,
  .case-grid,
  .testimonial-grid,
  .article-grid,
  .news-grid,
  .contact-grid{
    grid-template-columns:1fr;
  }

  .about-card{
    position:static;
  }

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

  .slide{
    padding:40px 24px;
  }

  .slide h2{
    font-size:24px;
  }

  .slide p{
    font-size:15px;
  }

  .section{
    padding:36px 16px;
  }

  .section-title{
    font-size:22px;
  }

  .banner{
    padding:0 16px;
  }

  .banner-slider{
    min-height:300px;
  }

  .slide{
    min-height:300px;
  }
}

@media(max-width:600px){
  :root{
    --header-h:60px;
  }

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

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

  .search-box{
    display:none;
  }

  .header-inner{
    padding:0 14px;
  }

  .logo{
    font-size:19px;
  }

  .logo svg{
    width:28px;
    height:28px;
  }

  .slide{
    padding:32px 20px;
  }

  .slide h2{
    font-size:21px;
  }

  .slide p{
    font-size:14px;
    margin-bottom:18px;
  }

  .slide .btn{
    padding:10px 24px;
    font-size:14px;
  }

  .section-title{
    font-size:20px;
    padding-left:12px;
  }

  .section-sub{
    padding-left:12px;
    font-size:13px;
  }

  .stat-num{
    font-size:28px;
  }

  .stat-card{
    padding:22px 16px;
  }

  .feature-card,
  .solution-card,
  .article-card,
  .testimonial-card{
    padding:20px;
  }

  .howto-step{
    flex-direction:column;
    gap:12px;
    padding:20px;
  }

  .howto-num{
    width:38px;
    height:38px;
    font-size:16px;
  }

  .contact-info,
  .contact-form{
    padding:20px;
  }

  .back-to-top{
    bottom:20px;
    right:20px;
    width:42px;
    height:42px;
    font-size:18px;
  }

  .faq-question{
    padding:14px 18px;
    font-size:14px;
  }

  .faq-answer{
    padding:0 18px;
  }

  .faq-item.open .faq-answer{
    padding-bottom:14px;
  }
}

@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;
  }
}

@media print{
  .header,
  .back-to-top,
  .slider-dots,
  .theme-toggle,
  .mobile-menu-btn,
  .search-box,
  .footer{
    display:none !important;
  }

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

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