:root{
  --brand:#1b1f3b;
  --brand-2:#3d4a8f;
  --accent:#e8543f;
  --accent-2:#f4a63a;
  --ink:#1c2033;
  --ink-soft:#4a5068;
  --line:#e3e6ef;
  --bg:#ffffff;
  --bg-soft:#f5f7fc;
  --card:#ffffff;
  --glass:rgba(255,255,255,.62);
  --glass-border:rgba(255,255,255,.55);
  --shadow:0 8px 30px rgba(27,31,59,.08);
  --shadow-lg:0 20px 50px rgba(27,31,59,.14);
  --radius:14px;
  --radius-lg:22px;
  --grad-banner:linear-gradient(135deg,#eef1ff 0%,#fdf0ec 52%,#fff6e6 100%);
  --grad-brand:linear-gradient(135deg,var(--brand-2),var(--accent));
  --grad-accent:linear-gradient(120deg,var(--accent),var(--accent-2));
}
html[data-theme="dark"]{
  --brand:#0d1024;
  --brand-2:#5a68b8;
  --accent:#ff6a52;
  --accent-2:#ffbe55;
  --ink:#e8ebf5;
  --ink-soft:#a9b0c8;
  --line:#262b45;
  --bg:#0b0e1c;
  --bg-soft:#121629;
  --card:#161b30;
  --glass:rgba(22,27,48,.62);
  --glass-border:rgba(255,255,255,.08);
  --shadow:0 8px 30px rgba(0,0,0,.5);
  --shadow-lg:0 20px 50px rgba(0,0,0,.6);
  --grad-banner:linear-gradient(135deg,#141a33 0%,#1e1630 52%,#241a22 100%);
}
*{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",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background .35s,color .35s;overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:var(--brand-2);text-decoration:none;transition:color .25s}
a:hover{color:var(--accent)}
h1,h2,h3,h4{color:var(--ink);letter-spacing:.3px}
p{color:var(--ink-soft)}
.container{width:min(1180px,92%);margin:0 auto}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--accent);color:#fff;padding:8px 14px;z-index:999;border-radius:8px}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

/* 顶部条 */
.topbar{background:var(--brand);color:#cdd3ea;font-size:13px;position:relative;z-index:101}
.topbar .container{display:flex;justify-content:space-between;align-items:center;padding:7px 0;flex-wrap:wrap;gap:6px}
.topbar a{color:#cdd3ea}
.topbar a:hover{color:#fff}

/* 导航 */
header.site{
  position:sticky;top:0;z-index:100;
  background:var(--glass);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s,background .3s;
}
header.site.stuck{box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--ink);transition:transform .3s}
.logo:hover{color:var(--ink);transform:translateY(-1px)}
.logo .mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-size:16px;
  box-shadow:0 6px 18px rgba(232,84,63,.32);transition:transform .4s;
}
.logo:hover .mark{transform:rotate(-8deg) scale(1.06)}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--ink-soft);letter-spacing:1px}
nav.main ul{display:flex;gap:22px;list-style:none;flex-wrap:wrap}
nav.main a{color:var(--ink);font-size:15px;padding:6px 2px;border-bottom:2px solid transparent;transition:.25s}
nav.main a:hover{border-color:var(--accent);color:var(--accent)}
.nav-tools{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-block;padding:9px 18px;border-radius:999px;font-size:14px;
  border:1px solid transparent;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s,color .25s,border-color .25s;
  font-family:inherit;line-height:1.5;
}
.btn-primary{background:var(--grad-accent);color:#fff;box-shadow:0 8px 20px rgba(232,84,63,.3)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(232,84,63,.42)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:var(--glass);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.search-box{
  display:flex;align-items:center;border:1px solid var(--line);border-radius:999px;
  padding:3px 4px 3px 12px;background:var(--bg-soft);transition:border-color .25s,box-shadow .25s;
}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(232,84,63,.14)}
.search-box input{border:0;background:transparent;outline:none;color:var(--ink);width:150px;font-size:14px;padding:5px 0;font-family:inherit}
.search-box button{border:0;background:var(--brand-2);color:#fff;border-radius:999px;padding:6px 12px;font-size:13px;cursor:pointer;transition:background .25s}
.search-box button:hover{background:var(--accent)}
.icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--line);
  background:var(--bg-soft);color:var(--ink);display:grid;place-items:center;cursor:pointer;font-size:16px;
  transition:.25s;
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent);transform:rotate(180deg)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--bg-soft);color:var(--ink);font-size:18px;cursor:pointer;transition:.25s;
}
.menu-toggle:hover{border-color:var(--accent);color:var(--accent)}

/* Banner */
.banner{position:relative;overflow:hidden;background:var(--grad-banner);transition:background .35s}
.banner::before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,84,63,.18),transparent 68%);
  top:-180px;right:-140px;pointer-events:none;
}
.banner::after{
  content:"";position:absolute;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(61,74,143,.16),transparent 68%);
  bottom:-200px;left:-120px;pointer-events:none;
}
.slides{position:relative;min-height:440px}
.slide{
  position:absolute;inset:0;opacity:0;transition:opacity .8s ease;
  display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:center;
  padding:56px 0;pointer-events:none;
}
.slide.active{opacity:1;pointer-events:auto;position:relative}
.slide h1,.slide h2{font-size:clamp(26px,3.4vw,42px);line-height:1.3;font-weight:800;letter-spacing:.5px}
.slide h1 em{font-style:normal;color:var(--accent);position:relative}
.slide h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:8px;border-radius:6px;
  background:linear-gradient(90deg,rgba(232,84,63,.28),rgba(244,166,58,.28));z-index:-1;
}
.slide p.lead{margin-top:16px;font-size:17px;color:var(--ink-soft);max-width:560px}
.slide .cta{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.slide .visual{display:grid;place-items:center}
.slide .visual svg{
  width:100%;max-width:460px;border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);transition:transform .6s ease;
}
.slide.active .visual svg{animation:floaty 6s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.dots button{
  width:11px;height:11px;border-radius:50%;border:0;background:rgba(120,130,170,.4);
  cursor:pointer;padding:0;transition:.3s;
}
.dots button:hover{background:rgba(232,84,63,.6)}
.dots button.on{background:var(--accent);width:26px;border-radius:999px}
.banner-arrow{
  position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;border-radius:50%;
  border:1px solid var(--glass-border);background:var(--glass);color:var(--brand);
  cursor:pointer;font-size:18px;box-shadow:var(--shadow);z-index:5;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  transition:.25s;
}
.banner-arrow:hover{background:var(--accent);color:#fff;border-color:var(--accent);transform:translateY(-50%) scale(1.08)}
.banner-arrow.prev{left:12px}
.banner-arrow.next{right:12px}

/* 面包屑 */
.crumb{background:var(--bg-soft);border-bottom:1px solid var(--line);font-size:13px}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:12px 0;color:var(--ink-soft)}
.crumb li+li::before{content:"›";margin-right:6px;color:var(--ink-soft)}
.crumb a{color:var(--ink-soft)}
.crumb a:hover{color:var(--accent)}

/* 通用区块 */
section{padding:64px 0;position:relative}
section:nth-child(even){background:var(--bg-soft)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;letter-spacing:.5px}
.sec-head h2 span{color:var(--accent);position:relative}
.sec-head h2 span::after{
  content:"";position:absolute;left:0;right:0;bottom:1px;height:6px;border-radius:4px;
  background:linear-gradient(90deg,rgba(232,84,63,.24),rgba(244,166,58,.24));z-index:-1;
}
.sec-head p{margin-top:12px;color:var(--ink-soft)}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);
  transition:transform .35s cubic-bezier(.2,.8,.3,1),box-shadow .35s,border-color .35s;
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(135deg,rgba(232,84,63,.07),transparent 42%);
  opacity:0;transition:opacity .35s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(232,84,63,.35)}
.card:hover::before{opacity:1}
.card h3{font-size:18px;margin-bottom:10px;position:relative}
.card p{color:var(--ink-soft);font-size:15px;position:relative}
.card .ico{
  width:46px;height:46px;border-radius:14px;background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-weight:700;margin-bottom:14px;
  box-shadow:0 8px 20px rgba(61,74,143,.28);transition:transform .4s;
}
.card:hover .ico{transform:rotate(-6deg) scale(1.06)}

/* 数字 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 14px;transition:transform .35s,box-shadow .35s,border-color .35s;
}
.stat:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(232,84,63,.3)}
.stat .num{
  font-size:36px;font-weight:800;letter-spacing:1px;
  background:var(--grad-accent);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--accent);
}
.stat .lb{color:var(--ink-soft);font-size:14px;margin-top:4px}

/* 文章 */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.article{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .35s,box-shadow .35s,border-color .35s;
}
.article:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(232,84,63,.32)}
.article .meta{font-size:12px;color:var(--ink-soft);display:flex;gap:12px;margin-bottom:8px;flex-wrap:wrap}
.article .meta span{background:var(--bg-soft);padding:1px 10px;border-radius:999px;border:1px solid var(--line)}
.article h3{font-size:17px;line-height:1.5;margin-bottom:8px;transition:color .25s}
.article:hover h3{color:var(--accent)}
.article p{font-size:14px;color:var(--ink-soft);flex:1}
.article .more{margin-top:14px;font-size:14px;font-weight:600;color:var(--accent);transition:transform .25s;display:inline-block}
.article:hover .more{transform:translateX(5px)}

/* FAQ */
.faq-item{
  border:1px solid var(--line);border-radius:12px;margin-bottom:12px;
  background:var(--card);overflow:hidden;transition:border-color .3s,box-shadow .3s;
}
.faq-item:hover{border-color:rgba(232,84,63,.32)}
.faq-item.open{border-color:rgba(232,84,63,.45);box-shadow:var(--shadow)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:0;padding:16px 20px;
  font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  font-family:inherit;transition:color .25s;
}
.faq-q:hover{color:var(--accent)}
.faq-q .plus{color:var(--accent);font-size:20px;transition:transform .3s;flex-shrink:0}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{display:none;padding:0 20px 18px;color:var(--ink-soft);font-size:15px;animation:fadeIn .35s ease}
.faq-item.open .faq-a{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* HowTo */
.steps{display:grid;gap:16px;counter-reset:step}
.step{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px 20px 70px;position:relative;
  transition:transform .3s,box-shadow .3s,border-color .3s;
}
.step:hover{transform:translateX(6px);box-shadow:var(--shadow);border-color:rgba(232,84,63,.3)}
.step::before{
  counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;
  width:34px;height:34px;border-radius:50%;background:var(--grad-brand);color:#fff;
  display:grid;place-items:center;font-weight:700;
  box-shadow:0 6px 16px rgba(61,74,143,.3);
}
.step h4{font-size:16px;margin-bottom:6px}
.step p{font-size:14px;color:var(--ink-soft)}

/* 表格 */
table{
  width:100%;border-collapse:collapse;background:var(--card);
  border-radius:var(--radius);overflow:hidden;font-size:14px;
  box-shadow:var(--shadow);
}
th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
th{background:var(--bg-soft);font-weight:700;color:var(--ink)}
td{color:var(--ink-soft)}
tbody tr{transition:background .25s}
tbody tr:hover{background:var(--bg-soft)}
tr:last-child td{border-bottom:0}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px}
.contact-info{display:grid;gap:14px}
.contact-item{
  display:flex;gap:14px;background:var(--card);border:1px solid var(--line);
  border-radius:12px;padding:16px;transition:transform .3s,box-shadow .3s,border-color .3s;
}
.contact-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(232,84,63,.3)}
.contact-item .k{font-weight:700;min-width:76px;color:var(--ink)}
.contact-item .v{color:var(--ink-soft)}
form.contact-form{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
form.contact-form label{display:block;font-size:14px;margin-bottom:6px;font-weight:600;color:var(--ink)}
form.contact-form input,
form.contact-form textarea,
form.contact-form select{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;
  background:var(--bg-soft);color:var(--ink);font-size:14px;margin-bottom:14px;
  font-family:inherit;transition:border-color .25s,box-shadow .25s,background .25s;
}
form.contact-form input:focus,
form.contact-form textarea:focus,
form.contact-form select:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(232,84,63,.14);
  background:var(--card);
}
form.contact-form textarea{min-height:110px;resize:vertical}
form.contact-form input::placeholder,
form.contact-form textarea::placeholder{color:var(--ink-soft);opacity:.7}

/* 页脚 */
footer.site{background:var(--brand);color:#c3c9e0;padding:52px 0 0;position:relative;overflow:hidden}
footer.site::before{
  content:"";position:absolute;width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,84,63,.18),transparent 70%);
  top:-160px;right:-100px;pointer-events:none;
}
footer.site h4{color:#fff;font-size:15px;margin-bottom:14px}
footer.site a{color:#c3c9e0;font-size:14px;line-height:2;transition:color .25s,padding-left .25s}
footer.site a:hover{color:#fff;padding-left:4px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;position:relative}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding:18px 0;font-size:13px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;position:relative;
}

/* 返回顶部 */
#toTop{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;border:0;
  background:var(--grad-accent);color:#fff;font-size:18px;cursor:pointer;
  box-shadow:0 10px 26px rgba(232,84,63,.4);opacity:0;pointer-events:none;
  transition:opacity .3s,transform .3s;z-index:90;
}
#toTop.show{opacity:1;pointer-events:auto}
#toTop:hover{transform:translateY(-4px) scale(1.06)}

/* 滚动动画 */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.8,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal:nth-child(2){transition-delay:.06s}
.reveal:nth-child(3){transition-delay:.12s}
.reveal:nth-child(4){transition-delay:.18s}
.reveal:nth-child(5){transition-delay:.24s}
.reveal:nth-child(6){transition-delay:.3s}

/* 响应式 */
@media(max-width:960px){
  .slide{grid-template-columns:1fr;text-align:center}
  .slide .cta{justify-content:center}
  .slide p.lead{margin-left:auto;margin-right:auto}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  section{padding:48px 0}
  nav.main{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--glass);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);padding:14px 4%;box-shadow:var(--shadow);
    animation:fadeIn .3s ease;
  }
  nav.main.open{display:block}
  nav.main ul{flex-direction:column;gap:4px}
  nav.main a{display:block;padding:8px 4px}
  .menu-toggle{display:block}
  .search-box{display:none}
  .g2,.g3,.g4,.article-list{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr}
  .banner-arrow{display:none}
  .slide{padding:40px 0}
  .slides{min-height:auto}
  .topbar .container{justify-content:center;text-align:center}
  .stat .num{font-size:30px}
  table{font-size:13px}
  th,td{padding:10px 10px}
  #toTop{right:14px;bottom:18px;width:42px;height:42px}
}
@media(max-width:480px){
  body{font-size:15px}
  .slide h1,.slide h2{font-size:24px}
  .card{padding:20px}
  .contact-item{flex-direction:column;gap:4px}
  .contact-item .k{min-width:0}
}

/* 减弱动效偏好 */
@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}
}

/* 打印 */
@media print{
  header.site,.topbar,.banner,.dots,.banner-arrow,#toTop,footer.site{display:none}
  body{color:#000;background:#fff}
  section{padding:20px 0}
}