:root{
  --brand:#2f5d50;
  --brand-2:#8a6d3b;
  --brand-glow:rgba(47,93,80,.28);
  --accent:#c9a86a;
  --bg:#fbfaf6;
  --bg-soft:#f3f0e8;
  --text:#2a2a2a;
  --muted:#6b6b6b;
  --card:rgba(255,255,255,.72);
  --card-solid:#ffffff;
  --line:rgba(229,225,216,.9);
  --glass:rgba(255,255,255,.55);
  --glass-border:rgba(255,255,255,.6);
  --shadow:0 10px 30px rgba(47,93,80,.08);
  --shadow-hover:0 18px 44px rgba(47,93,80,.18);
  --radius:16px;
  --radius-sm:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

body.dark{
  --bg:#151816;
  --bg-soft:#1b1f1c;
  --text:#e8e6df;
  --muted:#a9a79f;
  --card:rgba(36,40,37,.72);
  --card-solid:#242825;
  --line:rgba(58,63,59,.9);
  --glass:rgba(30,34,31,.55);
  --glass-border:rgba(255,255,255,.08);
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 18px 44px rgba(0,0,0,.5);
  --brand-glow:rgba(138,109,59,.35);
}

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

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

body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",sans-serif;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(138,109,59,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(47,93,80,.10), transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.8;
  font-size:16px;
  min-height:100vh;
  transition:background .4s var(--ease),color .4s var(--ease);
  -webkit-font-smoothing:antialiased;
}

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

a{
  color:var(--brand);
  text-decoration:none;
  transition:color .25s var(--ease),opacity .25s var(--ease);
}
a:hover{color:var(--brand-2);text-decoration:none;}

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

.wrap{max-width:1180px;margin:0 auto;padding:0 20px;}

/* ============ Header ============ */
header.site{
  position:sticky;
  top:0;
  z-index:999;
  background:var(--glass);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .4s var(--ease),border-color .4s var(--ease);
}

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

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:20px;
  letter-spacing:.5px;
  color:var(--brand);
  transition:transform .3s var(--ease);
}
.logo:hover{transform:translateY(-1px) scale(1.02);}
.logo svg{
  filter:drop-shadow(0 4px 10px var(--brand-glow));
  transition:transform .4s var(--ease);
}
.logo:hover svg{transform:rotate(-8deg);}

nav.main ul{
  display:flex;
  gap:6px;
  list-style:none;
  flex-wrap:wrap;
}
nav.main a{
  position:relative;
  font-size:15px;
  color:var(--text);
  padding:6px 10px;
  border-radius:8px;
  display:inline-block;
  transition:color .25s var(--ease),background .25s var(--ease);
}
nav.main a::after{
  content:"";
  position:absolute;
  left:10px;right:10px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
nav.main a:hover{color:var(--brand);background:rgba(47,93,80,.06);}
nav.main a:hover::after{transform:scaleX(1);}

.tools{
  display:flex;
  gap:10px;
  align-items:center;
}
.tools input{
  padding:7px 12px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--glass);
  color:var(--text);
  font-size:14px;
  outline:none;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
}
.tools input::placeholder{color:var(--muted);}
.tools input:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px var(--brand-glow);
  background:var(--card-solid);
}

.btn{
  padding:8px 16px;
  border-radius:10px;
  border:1px solid var(--brand);
  background:linear-gradient(135deg,var(--brand),#3c7363);
  color:#fff;
  cursor:pointer;
  font-size:14px;
  font-family:inherit;
  letter-spacing:.5px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
  box-shadow:0 6px 16px var(--brand-glow);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px var(--brand-glow);}
.btn:active{transform:translateY(0);}
.btn.ghost{
  background:transparent;
  color:var(--brand);
  box-shadow:none;
}
.btn.ghost:hover{
  background:rgba(47,93,80,.08);
  box-shadow:none;
}

/* ============ Breadcrumb ============ */
.breadcrumb{
  font-size:13px;
  color:var(--muted);
  padding:16px 0 4px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand);}

/* ============ Banner ============ */
.banner{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#2f5d50 0%,#3f7a68 45%,#8a6d3b 100%);
  color:#fff;
  border-radius:22px;
  margin:20px 0 24px;
  min-height:360px;
  box-shadow:0 24px 60px rgba(47,93,80,.28);
  isolation:isolate;
}
.banner::before{
  content:"";
  position:absolute;
  inset:-40%;
  background:
    radial-gradient(closest-side, rgba(255,255,255,.18), transparent 70%) 20% 30%/55% 55% no-repeat,
    radial-gradient(closest-side, rgba(201,168,106,.28), transparent 70%) 80% 70%/50% 50% no-repeat;
  z-index:-1;
  animation:floatGlow 14s ease-in-out infinite alternate;
}
.banner::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.35;
  z-index:-1;
  pointer-events:none;
}
@keyframes floatGlow{
  from{transform:translate3d(0,0,0) scale(1);}
  to{transform:translate3d(3%,-4%,0) scale(1.08);}
}

.slide{
  display:none;
  padding:60px 44px;
  position:relative;
  z-index:1;
}
.slide.active{display:block;animation:fade .7s var(--ease);}
@keyframes fade{
  from{opacity:0;transform:translateY(12px);}
  to{opacity:1;transform:none;}
}

.slide h1{
  font-size:34px;
  margin-bottom:16px;
  line-height:1.4;
  letter-spacing:.5px;
  text-shadow:0 2px 18px rgba(0,0,0,.18);
}
.slide p{
  max-width:660px;
  opacity:.95;
  color:#f3f1ea;
  font-size:16.5px;
}

.dots{
  position:absolute;
  bottom:18px;
  left:44px;
  display:flex;
  gap:10px;
  z-index:2;
}
.dots span{
  width:10px;
  height:10px;
  border-radius:50%;
  background:rgba(255,255,255,.45);
  cursor:pointer;
  transition:background .3s var(--ease),transform .3s var(--ease),width .3s var(--ease);
}
.dots span:hover{background:rgba(255,255,255,.8);transform:scale(1.2);}
.dots span.on{background:#fff;width:26px;border-radius:6px;}

/* ============ Anchor nav ============ */
.anchor-nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin:18px 0 8px;
}
.anchor-nav a{
  font-size:14px;
  padding:6px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  color:var(--text);
  transition:transform .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease);
}
.anchor-nav a:hover{
  transform:translateY(-2px);
  border-color:var(--brand);
  color:var(--brand);
  background:var(--card-solid);
  box-shadow:var(--shadow);
}

/* ============ Sections ============ */
section{
  padding:48px 0;
  border-bottom:1px solid var(--line);
}
section:last-of-type{border-bottom:none;}

section h2{
  font-size:27px;
  color:var(--brand);
  margin-bottom:20px;
  position:relative;
  padding-left:16px;
  letter-spacing:.5px;
}
section h2::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  bottom:8px;
  width:5px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  box-shadow:0 0 14px var(--brand-glow);
}

h3{
  font-size:20px;
  margin:24px 0 10px;
  color:var(--brand);
  letter-spacing:.3px;
}
h4{
  font-size:17px;
  margin:16px 0 8px;
  color:var(--text);
}
p{
  margin-bottom:14px;
  color:var(--text);
}
.muted{
  color:var(--muted);
  font-size:14px;
}

/* ============ Grid & Cards ============ */
.grid{display:grid;gap:20px;}
.g3{grid-template-columns:repeat(3,1fr);}
.g2{grid-template-columns:repeat(2,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}

.card{
  position:relative;
  background:var(--card);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  backdrop-filter:saturate(160%) blur(12px);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,.35),transparent 45%);
  opacity:0;
  transition:opacity .35s var(--ease);
  pointer-events:none;
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:var(--brand);
}
.card:hover::before{opacity:1;}
.card h3{margin-top:0;}

/* ============ Stats ============ */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  text-align:center;
}
.stat{
  padding:20px;
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--glass-border);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.stat b{
  font-size:34px;
  color:var(--brand);
  display:block;
  line-height:1.2;
  letter-spacing:.5px;
}

/* ============ Article ============ */
.article{
  position:relative;
  background:var(--card);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  backdrop-filter:saturate(160%) blur(12px);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.article:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-hover);
  border-color:var(--brand);
}
.article h3{
  font-size:17px;
  margin:0 0 8px;
  line-height:1.6;
}
.article .date{
  font-size:13px;
  color:var(--muted);
  margin-bottom:10px;
}
.article a{
  display:inline-block;
  font-size:14px;
  margin-top:4px;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.article a:hover{border-color:var(--brand-2);color:var(--brand-2);}

/* ============ FAQ ============ */
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  margin-bottom:12px;
  background:var(--card);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  overflow:hidden;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.faq-item:hover{border-color:var(--brand);box-shadow:var(--shadow);}
.faq-q{
  padding:15px 18px;
  cursor:pointer;
  font-weight:600;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  user-select:none;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.faq-q:hover{color:var(--brand);background:rgba(47,93,80,.04);}
.faq-q span{
  flex:none;
  width:26px;height:26px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:rgba(47,93,80,.08);
  color:var(--brand);
  font-weight:700;
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease);
}
.faq-item.open .faq-q span{
  transform:rotate(180deg);
  background:var(--brand);
  color:#fff;
}
.faq-a{
  padding:0 18px;
  max-height:0;
  overflow:hidden;
  transition:max-height .4s var(--ease),padding .4s var(--ease);
  color:var(--muted);
}
.faq-item.open .faq-a{
  max-height:600px;
  padding-bottom:16px;
}

/* ============ Steps ============ */
ol.steps{
  padding-left:0;
  list-style:none;
  counter-reset:step;
}
ol.steps li{
  position:relative;
  margin-bottom:12px;
  padding:12px 16px 12px 52px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  counter-increment:step;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
ol.steps li::before{
  content:counter(step);
  position:absolute;
  left:14px;
  top:50%;
  transform:translateY(-50%);
  width:26px;height:26px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;
  font-size:13px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 10px var(--brand-glow);
}
ol.steps li:hover{
  transform:translateX(4px);
  border-color:var(--brand);
  box-shadow:var(--shadow);
}

/* ============ Footer ============ */
footer.site{
  background:var(--glass);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  backdrop-filter:saturate(160%) blur(14px);
  border-top:1px solid var(--line);
  padding:40px 0 22px;
  font-size:14px;
  margin-top:20px;
}
footer .cols{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:28px;
}
footer h4{
  margin-bottom:12px;
  color:var(--brand);
  letter-spacing:.5px;
}
footer ul{list-style:none;}
footer li{margin-bottom:8px;color:var(--muted);}
footer a{color:var(--muted);}
footer a:hover{color:var(--brand);}
footer p{color:var(--muted);}

.copy{
  text-align:center;
  margin-top:28px;
  padding-top:18px;
  border-top:1px solid var(--line);
  color:var(--muted);
  font-size:13px;
}
.copy p{margin-bottom:6px;}

/* ============ Back to top ============ */
#top{
  position:fixed;
  right:22px;
  bottom:22px;
  width:48px;
  height:48px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;
  border:none;
  cursor:pointer;
  font-size:18px;
  display:none;
  z-index:999;
  box-shadow:0 10px 26px var(--brand-glow);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
#top:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 16px 34px var(--brand-glow);}

/* ============ Reveal animation ============ */
.reveal{
  opacity:0;
  transform:translateY(24px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.reveal.in{
  opacity:1;
  transform:none;
}

/* ============ Responsive ============ */
@media(max-width:900px){
  .g3,.g4,.g2,.stats,footer .cols{grid-template-columns:1fr 1fr;}
  .slide{padding:48px 32px;}
  .slide h1{font-size:28px;}
  .dots{left:32px;}
  nav.main ul{gap:2px;}
}

@media(max-width:640px){
  body{font-size:15px;}
  .g3,.g4,.g2,.stats,footer .cols{grid-template-columns:1fr;}
  .nav{padding:10px 0;}
  nav.main{order:3;width:100%;}
  nav.main ul{justify-content:flex-start;gap:4px;}
  nav.main a{font-size:14px;padding:5px 8px;}
  .tools{order:2;}
  .tools input{width:120px;}
  .banner{min-height:auto;border-radius:18px;}
  .slide{padding:40px 22px 56px;}
  .slide h1{font-size:22px;line-height:1.45;}
  .slide p{font-size:15px;}
  .dots{left:22px;bottom:16px;}
  section{padding:36px 0;}
  section h2{font-size:22px;}
  h3{font-size:18px;}
  .card,.article{padding:18px;}
  #top{right:16px;bottom:16px;width:44px;height:44px;}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}