:root{
  --brand:#7a9e7e;
  --brand-deep:#4f6b53;
  --brand-soft:#eaf1ea;
  --ink:#26302a;
  --ink-soft:#4c5a50;
  --paper:#fbfaf6;
  --paper-2:#f3f1ea;
  --line:#e0e3da;
  --accent:#d9a86c;
  --radius:14px;
  --shadow:0 6px 24px rgba(38,48,42,.08);
  --shadow-lg:0 14px 40px rgba(38,48,42,.14);
  --maxw:1180px;
  --header-h:64px;
}
html[data-theme="dark"]{
  --brand:#8fb894;
  --brand-deep:#a9c9ad;
  --brand-soft:#1e2a22;
  --ink:#e8ece7;
  --ink-soft:#b6c1b8;
  --paper:#121815;
  --paper-2:#1a221d;
  --line:#2b352e;
  --accent:#e0b57d;
  --shadow:0 6px 24px rgba(0,0,0,.4);
  --shadow-lg:0 14px 40px rgba(0,0,0,.5);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.85;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  transition:background .3s,color .3s;
}
img,svg{max-width:100%;display:block}
a{color:var(--brand-deep);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
ul,ol{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,250,246,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s,background .3s;
}
html[data-theme="dark"] .site-header{background:rgba(18,24,21,.86)}
.site-header.scrolled{box-shadow:var(--shadow)}
.header-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  height:var(--header-h);display:flex;align-items:center;gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);letter-spacing:.5px}
.logo svg{width:34px;height:34px;flex:none}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--ink-soft);letter-spacing:2px}
.main-nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.main-nav a{
  padding:8px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-soft);font-weight:500;
}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand-deep)}
.header-tools{display:flex;align-items:center;gap:8px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:var(--paper-2);color:var(--ink-soft);cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:.2s;
}
.icon-btn:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand)}
.icon-btn svg{width:19px;height:19px}
.menu-toggle{display:none}
.search-box{position:relative;display:flex;align-items:center}
.search-box input{
  width:0;padding:0;opacity:0;border:1px solid var(--line);border-radius:10px;
  background:var(--paper-2);color:var(--ink);height:38px;font-size:14px;
  transition:width .3s,padding .3s,opacity .3s;
}
.search-box.open input{width:190px;padding:0 12px;opacity:1;margin-right:4px}
.search-box input:focus{outline:none;border-color:var(--brand)}

/* banner */
.banner{
  position:relative;overflow:hidden;border-radius:22px;margin-top:28px;
  background:linear-gradient(135deg,#eaf1ea,#f6f1e6);
  min-height:380px;
}
html[data-theme="dark"] .banner{background:linear-gradient(135deg,#1c2a22,#2a2620)}
.slide{
  position:absolute;inset:0;opacity:0;transform:translateY(10px);
  transition:opacity .7s ease,transform .7s ease;
  display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:30px;
  padding:44px 48px;pointer-events:none;
}
.slide.active{opacity:1;transform:translateY(0);pointer-events:auto}
.slide h2{font-size:clamp(24px,3.2vw,38px);line-height:1.3;letter-spacing:.5px;margin-bottom:16px;color:var(--ink)}
.slide p{color:var(--ink-soft);font-size:16px;margin-bottom:22px;max-width:520px}
.slide .tagline{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--brand-deep);background:rgba(122,158,126,.16);padding:4px 12px;border-radius:20px;margin-bottom:16px}
.slide-art{display:flex;justify-content:center;align-items:center}
.slide-art svg{width:100%;max-width:340px;height:auto;filter:drop-shadow(0 10px 24px rgba(79,107,83,.18))}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:30px;font-size:15px;font-weight:600;
  background:var(--brand);color:#fff;border:none;cursor:pointer;transition:.25s;
}
.btn:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn.ghost{background:transparent;color:var(--brand-deep);border:1.5px solid var(--brand)}
.btn.ghost:hover{background:var(--brand-soft);color:var(--brand-deep)}
.banner-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.banner-dots button{
  width:10px;height:10px;border-radius:50%;border:none;cursor:pointer;
  background:rgba(79,107,83,.3);transition:.3s;
}
.banner-dots button.active{background:var(--brand);width:26px;border-radius:6px}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:34px 0}
.stat{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 20px;text-align:center;transition:.3s;
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat .num{font-size:34px;font-weight:800;color:var(--brand-deep);line-height:1.1;letter-spacing:.5px}
.stat .num span{font-size:16px;font-weight:600;margin-left:2px}
.stat .label{font-size:13.5px;color:var(--ink-soft);margin-top:6px;letter-spacing:.5px}

/* section */
.section{padding:56px 0}
.section.alt{background:var(--paper-2)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head .eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:3px;color:var(--brand-deep);
  background:rgba(122,158,126,.16);padding:4px 12px;border-radius:20px;margin-bottom:14px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin-bottom:12px;letter-spacing:.5px}
.section-head p{color:var(--ink-soft);font-size:15.5px}
.section-head h3{font-size:19px;margin:18px 0 8px}
.section-head h4{font-size:16px;margin:14px 0 6px;color:var(--brand-deep)}
.prose p{margin-bottom:14px;color:var(--ink-soft);text-align:justify}
.prose strong{color:var(--ink)}

/* cards */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;transition:.3s;position:relative;overflow:hidden;
}
.section.alt .card{background:var(--paper)}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.card .ico{
  width:48px;height:48px;border-radius:12px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--brand-deep);
}
.card .ico svg{width:26px;height:26px}
.card h3{font-size:18px;margin-bottom:10px;letter-spacing:.3px}
.card p{color:var(--ink-soft);font-size:14.5px}
.card ul{margin-top:12px}
.card ul li{position:relative;padding-left:18px;font-size:14px;color:var(--ink-soft);margin-bottom:6px}
.card ul li::before{content:"";position:absolute;left:0;top:.7em;width:7px;height:7px;border-radius:50%;background:var(--brand)}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* articles */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.article{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:.3s;display:flex;flex-direction:column;
}
.article:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.article .meta{display:flex;gap:12px;font-size:12.5px;color:var(--ink-soft);margin-bottom:10px;flex-wrap:wrap}
.article .meta .cat{color:var(--brand-deep);background:var(--brand-soft);padding:2px 10px;border-radius:20px}
.article h3{font-size:17.5px;margin-bottom:10px;line-height:1.45}
.article p{color:var(--ink-soft);font-size:14px;flex:1;margin-bottom:14px;text-align:justify}
.article .read{font-size:14px;font-weight:600;color:var(--brand-deep)}
.article .read::after{content:" →";transition:.2s}
.article:hover .read::after{margin-left:4px}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.3s}
.section.alt .faq-item{background:var(--paper)}
.faq-item.open{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-q{
  width:100%;text-align:left;padding:18px 22px;background:none;border:none;cursor:pointer;
  font-size:15.5px;font-weight:600;color:var(--ink);display:flex;justify-content:space-between;
  align-items:center;gap:16px;font-family:inherit;line-height:1.6;
}
.faq-q .arrow{flex:none;width:22px;height:22px;transition:transform .3s;color:var(--brand-deep)}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a .inner{padding:0 22px 20px;color:var(--ink-soft);font-size:14.5px;text-align:justify}

/* howto */
.steps{counter-reset:step;display:grid;gap:16px;max-width:900px}
.step{
  background:var(--paper);border:1px solid var(--line);border-radius:12px;
  padding:22px 24px 22px 64px;position:relative;transition:.3s;
}
.section.alt .step{background:var(--paper)}
.step:hover{border-color:var(--brand)}
.step::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:20px;top:22px;width:30px;height:30px;border-radius:50%;
  background:var(--brand);color:#fff;font-weight:700;font-size:14px;
  display:flex;align-items:center;justify-content:center;
}
.step h4{font-size:16px;margin-bottom:6px}
.step p{color:var(--ink-soft);font-size:14.5px}

/* cases & testimonials */
.case{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;transition:.3s;
}
.section.alt .case{background:var(--paper)}
.case:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.case .case-tag{font-size:12.5px;color:var(--brand-deep);background:var(--brand-soft);padding:3px 10px;border-radius:20px;display:inline-block;margin-bottom:12px}
.case h3{font-size:17px;margin-bottom:10px}
.case p{color:var(--ink-soft);font-size:14.5px;margin-bottom:8px}
.quote{
  background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:12px;
  padding:24px 26px;position:relative;
}
.quote p{font-size:15px;color:var(--ink);margin-bottom:12px;font-style:italic}
.quote .who{font-size:13.5px;color:var(--ink-soft);font-weight:600}
.quote .who span{font-weight:400;color:var(--ink-soft)}

/* news */
.news-list{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line)}
.news-item{
  display:flex;gap:20px;align-items:baseline;padding:18px 6px;border-bottom:1px solid var(--line);
  transition:.2s;
}
.news-item:hover{background:var(--brand-soft);padding-left:14px;border-radius:8px}
.news-item time{font-size:13px;color:var(--ink-soft);flex:none;width:100px;font-variant-numeric:tabular-nums}
.news-item a{font-size:15px;font-weight:500;color:var(--ink)}
.news-item a:hover{color:var(--brand-deep)}
.news-item .tag{font-size:12px;color:var(--brand-deep);background:var(--brand-soft);padding:2px 8px;border-radius:20px;margin-left:auto;flex:none}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:26px}
.contact-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.section.alt .contact-card{background:var(--paper)}
.contact-list li{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.contact-list li:last-child{border-bottom:none}
.contact-list .k{color:var(--ink-soft);flex:none;width:86px}
.contact-list .v{color:var(--ink);font-weight:500;word-break:break-all}
.map-box{background:var(--brand-soft);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:200px;text-align:center}
.map-box svg{width:80px;height:80px;margin-bottom:12px;color:var(--brand-deep)}
.map-box p{font-size:14px;color:var(--ink-soft)}

/* footer */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding:48px 0 24px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer-col h4{font-size:15px;margin-bottom:14px;letter-spacing:.5px}
.footer-col p,.footer-col a{font-size:13.5px;color:var(--ink-soft);line-height:2}
.footer-col a:hover{color:var(--brand-deep)}
.footer-col ul li{margin-bottom:2px}
.footer-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:var(--ink-soft)}
.footer-bottom .links{display:flex;gap:16px;flex-wrap:wrap}
.footer-bottom .links a{color:var(--ink-soft)}
.footer-bottom .links a:hover{color:var(--brand-deep)}

/* back to top */
#backTop{
  position:fixed;right:24px;bottom:28px;z-index:90;width:46px;height:46px;border-radius:50%;
  border:none;background:var(--brand);color:#fff;cursor:pointer;box-shadow:var(--shadow-lg);
  display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;
  transform:translateY(16px);transition:.3s;
}
#backTop.show{opacity:1;pointer-events:auto;transform:none}
#backTop:hover{background:var(--brand-deep)}
#backTop svg{width:20px;height:20px}

/* breadcrumb */
.breadcrumb{font-size:13px;color:var(--ink-soft);padding:18px 0 0;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb a{color:var(--ink-soft)}
.breadcrumb a:hover{color:var(--brand-deep)}
.breadcrumb .sep{color:var(--line)}

/* author box */
.author-box{
  display:flex;gap:18px;align-items:flex-start;background:var(--brand-soft);
  border-radius:var(--radius);padding:22px 24px;margin-top:26px;
}
.author-box .avatar{width:56px;height:56px;border-radius:50%;flex:none;background:var(--brand);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:20px}
.author-box h4{font-size:15px;margin-bottom:4px}
.author-box p{font-size:13.5px;color:var(--ink-soft)}

/* responsive */
@media (max-width:980px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .article-list{grid-template-columns:1fr}
  .slide{grid-template-columns:1fr;padding:32px 28px;text-align:left}
  .slide-art{display:none}
}
@media (max-width:760px){
  .main-nav{
    position:fixed;top:var(--header-h);left:0;right:0;background:var(--paper);
    flex-direction:column;padding:12px;gap:2px;border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:transform .3s;box-shadow:var(--shadow);z-index:99;
  }
  .main-nav.open{transform:none}
  .main-nav a{padding:12px 16px;font-size:15px}
  .menu-toggle{display:flex}
  .search-box.open input{width:140px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .banner{min-height:320px}
  .slide{padding:28px 22px}
  .section{padding:40px 0}
  .news-item{flex-wrap:wrap;gap:8px}
  .news-item .tag{margin-left:0}
}
@media (max-width:480px){
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .header-inner{gap:12px}
  .logo small{display:none}
  .search-box.open input{width:110px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}