:root{
  --brand:#1f7a4d;
  --brand-2:#2fa36b;
  --brand-3:#9fd3b8;
  --ink:#1c2321;
  --ink-strong:#0f1714;
  --muted:#5a6b64;
  --muted-soft:#7d8f87;
  --bg:#f6faf7;
  --bg-soft:#eef6f1;
  --card:#ffffff;
  --card-glass:rgba(255,255,255,.72);
  --line:#dfe9e3;
  --line-soft:rgba(31,122,77,.12);
  --radius:14px;
  --radius-lg:20px;
  --radius-sm:10px;
  --shadow-sm:0 2px 8px rgba(22,55,40,.06);
  --shadow-md:0 10px 28px rgba(22,55,40,.10);
  --shadow-lg:0 22px 48px rgba(22,55,40,.16);
  --glow:0 0 0 1px rgba(47,163,107,.18),0 8px 26px rgba(47,163,107,.18);
  --grad-banner:linear-gradient(135deg,#e7f5ee 0%,#d6efe2 42%,#f2fbf6 100%);
  --grad-brand:linear-gradient(135deg,var(--brand),var(--brand-2));
  --grad-soft:linear-gradient(135deg,rgba(31,122,77,.10),rgba(47,163,107,.20));
  --ease:cubic-bezier(.22,.61,.36,1);
  --fast:.22s;
  --mid:.42s;
}

[data-theme="dark"]{
  --brand:#3fbf85;
  --brand-2:#2fa36b;
  --brand-3:#2c5a44;
  --ink:#e8f1ec;
  --ink-strong:#ffffff;
  --muted:#9fb3aa;
  --muted-soft:#7d9188;
  --bg:#0f1714;
  --bg-soft:#131d18;
  --card:#16211c;
  --card-glass:rgba(22,33,28,.72);
  --line:#24332b;
  --line-soft:rgba(63,191,133,.16);
  --shadow-sm:0 2px 8px rgba(0,0,0,.28);
  --shadow-md:0 10px 28px rgba(0,0,0,.38);
  --shadow-lg:0 22px 48px rgba(0,0,0,.5);
  --glow:0 0 0 1px rgba(63,191,133,.28),0 8px 26px rgba(63,191,133,.22);
  --grad-banner:linear-gradient(135deg,#13211b 0%,#16291f 45%,#101a15 100%);
  --grad-soft:linear-gradient(135deg,rgba(63,191,133,.10),rgba(47,163,107,.22));
}

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

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

body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  transition:background var(--mid) var(--ease),color var(--mid) var(--ease);
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(60vw 60vw at 12% -10%,rgba(47,163,107,.10),transparent 60%),
    radial-gradient(50vw 50vw at 100% 0%,rgba(31,122,77,.08),transparent 55%);
}

[data-theme="dark"] body::before{
  background:
    radial-gradient(60vw 60vw at 12% -10%,rgba(63,191,133,.10),transparent 60%),
    radial-gradient(50vw 50vw at 100% 0%,rgba(47,163,107,.08),transparent 55%);
}

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

a:hover{
  color:var(--brand-2);
  text-decoration:underline;
}

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

.wrap{
  position:relative;
  z-index:1;
  max-width:1160px;
  margin:0 auto;
  padding:0 20px;
}

header.site{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--card-glass);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  backdrop-filter:saturate(180%) blur(16px);
  transition:background var(--mid) var(--ease),border-color var(--mid) var(--ease),box-shadow var(--mid) var(--ease);
}

header.site:hover{
  box-shadow:var(--shadow-sm);
}

.nav{
  display:flex;
  align-items:center;
  gap:18px;
  height:64px;
}

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:20px;
  color:var(--ink);
  letter-spacing:.5px;
  white-space:nowrap;
  transition:transform var(--fast) var(--ease);
}

.logo:hover{
  text-decoration:none;
  transform:translateY(-1px);
}

.logo .mark{
  width:34px;
  height:34px;
  border-radius:9px;
  background:var(--grad-brand);
  display:grid;
  place-items:center;
  color:#fff;
  font-size:18px;
  font-weight:700;
  box-shadow:0 6px 16px rgba(31,122,77,.28);
  transition:transform var(--mid) var(--ease),box-shadow var(--mid) var(--ease);
}

.logo:hover .mark{
  transform:rotate(-8deg) scale(1.05);
  box-shadow:0 10px 22px rgba(31,122,77,.36);
}

.nav > ul{
  display:flex;
  gap:16px;
  list-style:none;
  flex-wrap:wrap;
}

.nav > ul a{
  position:relative;
  color:var(--muted);
  font-size:15px;
  padding:4px 2px;
  transition:color var(--fast) var(--ease);
}

.nav > ul a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--grad-brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--mid) var(--ease);
}

.nav > ul a:hover{
  color:var(--brand);
  text-decoration:none;
}

.nav > ul a:hover::after{
  transform:scaleX(1);
}

.nav-tools{
  margin-left:auto;
  display:flex;
  gap:10px;
  align-items:center;
}

.search{
  display:flex;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  background:var(--bg-soft);
  transition:border-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease);
}

.search:focus-within{
  border-color:var(--brand-2);
  box-shadow:var(--glow);
}

.search input{
  border:0;
  background:transparent;
  padding:8px 10px;
  color:var(--ink);
  width:150px;
  outline:none;
  font-size:14px;
  font-family:inherit;
}

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

.search button{
  border:0;
  background:var(--grad-brand);
  color:#fff;
  padding:8px 12px;
  cursor:pointer;
  font-size:14px;
  font-family:inherit;
  transition:filter var(--fast) var(--ease),transform var(--fast) var(--ease);
}

.search button:hover{
  filter:brightness(1.08);
}

.search button:active{
  transform:scale(.97);
}

.icon-btn{
  border:1px solid var(--line);
  background:var(--card);
  color:var(--ink);
  border-radius:var(--radius-sm);
  padding:8px 10px;
  cursor:pointer;
  font-size:14px;
  font-family:inherit;
  transition:border-color var(--fast) var(--ease),color var(--fast) var(--ease),transform var(--fast) var(--ease),box-shadow var(--fast) var(--ease);
}

.icon-btn:hover{
  border-color:var(--brand-2);
  color:var(--brand);
  transform:translateY(-1px);
  box-shadow:var(--shadow-sm);
}

.icon-btn:active{
  transform:translateY(0) scale(.97);
}

.menu-toggle{
  display:none;
  border:1px solid var(--line);
  background:var(--card);
  color:var(--ink);
  border-radius:var(--radius-sm);
  padding:8px 12px;
  cursor:pointer;
  font-size:14px;
  font-family:inherit;
  transition:border-color var(--fast) var(--ease),color var(--fast) var(--ease);
}

.menu-toggle:hover{
  border-color:var(--brand-2);
  color:var(--brand);
}

.breadcrumb{
  font-size:14px;
  color:var(--muted);
  padding:14px 0;
}

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

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

.breadcrumb span{
  margin:0 6px;
  color:var(--muted-soft);
}

.banner{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  margin:24px 0;
  background:var(--grad-banner);
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
}

.banner::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(320px 220px at 88% 12%,rgba(47,163,107,.22),transparent 70%),
    radial-gradient(260px 200px at 8% 92%,rgba(31,122,77,.16),transparent 70%);
  pointer-events:none;
}

.slides{
  display:flex;
  transition:transform .6s var(--ease);
  will-change:transform;
}

.slide{
  min-width:100%;
  padding:38px 34px;
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:24px;
  align-items:center;
  position:relative;
  z-index:1;
}

.slide h1{
  font-size:30px;
  line-height:1.35;
  margin-bottom:12px;
  color:var(--ink-strong);
  letter-spacing:.2px;
}

.slide h2{
  font-size:26px;
  line-height:1.4;
  margin-bottom:12px;
  color:var(--ink-strong);
}

.slide p{
  color:var(--muted);
  margin-bottom:16px;
  font-size:15px;
}

.slide .cta{
  display:inline-block;
  background:var(--grad-brand);
  color:#fff;
  padding:10px 20px;
  border-radius:var(--radius-sm);
  font-weight:600;
  box-shadow:0 8px 20px rgba(31,122,77,.28);
  transition:transform var(--fast) var(--ease),box-shadow var(--fast) var(--ease),filter var(--fast) var(--ease);
}

.slide .cta:hover{
  text-decoration:none;
  transform:translateY(-2px);
  box-shadow:0 14px 28px rgba(31,122,77,.36);
  filter:brightness(1.05);
}

.slide .cta:active{
  transform:translateY(0) scale(.98);
}

.slide .art{
  min-height:180px;
  border-radius:var(--radius);
  background:var(--grad-soft);
  display:grid;
  place-items:center;
  border:1px solid var(--line-soft);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35);
  overflow:hidden;
  transition:transform var(--mid) var(--ease),box-shadow var(--mid) var(--ease);
}

.slide:hover .art{
  transform:translateY(-4px) scale(1.01);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),var(--shadow-md);
}

.slide .art svg{
  width:100%;
  height:100%;
}

.dots{
  position:absolute;
  bottom:14px;
  left:34px;
  display:flex;
  gap:8px;
  z-index:2;
}

.dots button{
  width:9px;
  height:9px;
  border-radius:50%;
  border:0;
  background:var(--line);
  cursor:pointer;
  padding:0;
  transition:background var(--fast) var(--ease),transform var(--fast) var(--ease),width var(--fast) var(--ease);
}

.dots button:hover{
  background:var(--brand-3);
  transform:scale(1.2);
}

.dots button.active{
  background:var(--grad-brand);
  width:22px;
  border-radius:6px;
}

section{
  padding:34px 0;
  position:relative;
}

h2{
  font-size:24px;
  margin-bottom:6px;
  line-height:1.4;
  color:var(--ink-strong);
  letter-spacing:.2px;
}

h2 .bar{
  display:inline-block;
  width:5px;
  height:20px;
  background:var(--grad-brand);
  border-radius:3px;
  margin-right:10px;
  vertical-align:-3px;
  box-shadow:0 0 12px rgba(47,163,107,.5);
}

h3{
  font-size:19px;
  margin:18px 0 8px;
  color:var(--ink-strong);
  line-height:1.5;
}

h4{
  font-size:16px;
  margin:14px 0 6px;
  color:var(--brand);
  line-height:1.5;
}

p{
  margin-bottom:12px;
  color:var(--ink);
}

.lead{
  color:var(--muted);
  font-size:15px;
  margin-bottom:18px;
}

.grid{
  display:grid;
  gap:18px;
}

.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);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--mid) var(--ease),box-shadow var(--mid) var(--ease),border-color var(--mid) var(--ease),background var(--mid) var(--ease);
  overflow:hidden;
}

.card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  background:var(--grad-soft);
  opacity:0;
  transition:opacity var(--mid) var(--ease);
  pointer-events:none;
}

.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:var(--line-soft);
}

.card:hover::before{
  opacity:.55;
}

.card > *{
  position:relative;
  z-index:1;
}

.card h3{
  margin-top:0;
}

.card p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:0;
}

.card ul{
  margin:0;
  padding-left:0;
}

.card ul li{
  margin-bottom:6px;
}

.stat{
  text-align:center;
  background:var(--card-glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

.stat .num{
  font-size:30px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
  letter-spacing:.5px;
  background:var(--grad-brand);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.stat .lbl{
  color:var(--muted);
  font-size:14px;
}

.article-card{
  display:flex;
  flex-direction:column;
  gap:6px;
}

.article-card .meta{
  font-size:13px;
  color:var(--muted-soft);
}

.article-card .sum{
  font-size:14px;
  color:var(--muted);
}

.article-card .more{
  margin-top:auto;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:4px;
  transition:gap var(--fast) var(--ease),color var(--fast) var(--ease);
}

.article-card .more::after{
  content:"→";
  transition:transform var(--fast) var(--ease);
}

.article-card .more:hover{
  text-decoration:none;
  color:var(--brand-2);
}

.article-card .more:hover::after{
  transform:translateX(4px);
}

.faq-item{
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:10px;
  background:var(--card);
  overflow:hidden;
  transition:border-color var(--mid) var(--ease),box-shadow var(--mid) var(--ease);
}

.faq-item:hover{
  border-color:var(--line-soft);
  box-shadow:var(--shadow-sm);
}

.faq-item.open{
  border-color:var(--brand-2);
  box-shadow:var(--glow);
}

.faq-q{
  width:100%;
  text-align:left;
  background:transparent;
  border:0;
  padding:16px 18px;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  gap:12px;
  font-family:inherit;
  line-height:1.6;
  transition:color var(--fast) var(--ease),background var(--fast) var(--ease);
}

.faq-q:hover{
  color:var(--brand);
  background:var(--bg-soft);
}

.faq-q span{
  flex:none;
  font-weight:400;
  color:var(--brand);
  transition:transform var(--mid) var(--ease);
}

.faq-item.open .faq-q span{
  transform:rotate(180deg);
}

.faq-a{
  padding:0 18px 16px;
  color:var(--muted);
  font-size:15px;
  display:none;
  animation:fadeIn .35s var(--ease);
}

.faq-item.open .faq-a{
  display:block;
}

@keyframes fadeIn{
  from{opacity:0;transform:translateY(-4px)}
  to{opacity:1;transform:none}
}

.howto ol,.howto ul{
  margin-left:20px;
  color:var(--muted);
}

.howto li{
  margin-bottom:8px;
}

.howto ol li::marker{
  color:var(--brand);
  font-weight:700;
}

.howto ul li::marker{
  color:var(--brand-2);
}

table{
  width:100%;
  border-collapse:collapse;
  margin:12px 0;
  font-size:15px;
  border-radius:var(--radius-sm);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  background:var(--card);
}

th,td{
  border:1px solid var(--line);
  padding:10px 12px;
  text-align:left;
  transition:background var(--fast) var(--ease);
}

th{
  background:var(--grad-soft);
  color:var(--ink-strong);
  font-weight:600;
}

td{
  color:var(--muted);
}

tbody tr:hover td{
  background:var(--bg-soft);
  color:var(--ink);
}

blockquote.card{
  font-style:normal;
  color:var(--muted);
  border-left:4px solid var(--brand);
  border-radius:var(--radius-sm);
  background:var(--card-glass);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}

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

.author-box{
  display:flex;
  gap:14px;
  align-items:flex-start;
  background:var(--card-glass);
  border:1px solid var(--line);
  border-radius:12px;
  padding:16px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-sm);
  transition:box-shadow var(--mid) var(--ease),transform var(--mid) var(--ease);
}

.author-box:hover{
  box-shadow:var(--shadow-md);
  transform:translateY(-2px);
}

.author-box .avatar{
  width:52px;
  height:52px;
  border-radius:50%;
  flex:none;
  box-shadow:0 4px 14px rgba(47,163,107,.3);
}

.author-box h4{
  margin-top:0;
}

.author-box p{
  color:var(--muted);
  font-size:14px;
  margin-bottom:6px;
}

.tag{
  display:inline-block;
  background:rgba(31,122,77,.1);
  color:var(--brand);
  border-radius:20px;
  padding:2px 12px;
  font-size:13px;
  margin:0 6px 6px 0;
  transition:background var(--fast) var(--ease),transform var(--fast) var(--ease);
}

.tag:hover{
  background:rgba(31,122,77,.18);
  transform:translateY(-1px);
}

#article-1,#article-2,#article-3,#article-4,#article-5,
#article-6,#article-7,#article-8,#article-9,#article-10{
  scroll-margin-top:84px;
}

#article-1 p,#article-2 p,#article-3 p,#article-4 p,#article-5 p,
#article-6 p,#article-7 p,#article-8 p,#article-9 p,#article-10 p{
  color:var(--muted);
  font-size:15px;
}

footer.site{
  position:relative;
  z-index:1;
  background:var(--card-glass);
  border-top:1px solid var(--line);
  padding:34px 0 20px;
  margin-top:20px;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.foot-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:24px;
}

.foot-grid h4{
  margin-top:0;
  color:var(--ink-strong);
}

.foot-grid ul{
  list-style:none;
}

.foot-grid li{
  margin-bottom:6px;
  font-size:14px;
  color:var(--muted);
}

.foot-grid a{
  color:var(--muted);
  transition:color var(--fast) var(--ease),padding-left var(--fast) var(--ease);
}

.foot-grid a:hover{
  color:var(--brand);
  text-decoration:none;
  padding-left:4px;
}

.copy{
  border-top:1px solid var(--line);
  margin-top:24px;
  padding-top:16px;
  font-size:13px;
  color:var(--muted-soft);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
}

#toTop{
  position:fixed;
  right:22px;
  bottom:22px;
  width:44px;
  height:44px;
  border-radius:50%;
  border:0;
  background:var(--grad-brand);
  color:#fff;
  font-size:18px;
  cursor:pointer;
  display:none;
  z-index:60;
  box-shadow:0 10px 24px rgba(31,122,77,.4);
  transition:transform var(--fast) var(--ease),box-shadow var(--fast) var(--ease),filter var(--fast) var(--ease);
}

#toTop:hover{
  transform:translateY(-3px);
  box-shadow:0 16px 32px rgba(31,122,77,.5);
  filter:brightness(1.08);
}

#toTop:active{
  transform:translateY(0) scale(.94);
}

::selection{
  background:rgba(47,163,107,.28);
  color:var(--ink-strong);
}

::-webkit-scrollbar{
  width:10px;
  height:10px;
}

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

::-webkit-scrollbar-thumb{
  background:var(--brand-3);
  border-radius:10px;
  border:2px solid var(--bg-soft);
}

::-webkit-scrollbar-thumb:hover{
  background:var(--brand-2);
}

@media(max-width:1024px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1.2fr 1fr 1fr}
}

@media(max-width:900px){
  .slide{grid-template-columns:1fr}
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .slide h1{font-size:26px}
  .slide h2{font-size:23px}
}

@media(max-width:640px){
  body{font-size:15px}
  .nav ul{
    display:none;
  }
  .menu-toggle{
    display:inline-block;
  }
  .nav ul.open{
    display:flex;
    position:absolute;
    top:64px;
    left:0;
    right:0;
    background:var(--card-glass);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    flex-direction:column;
    padding:14px 20px;
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-md);
    animation:fadeIn .3s var(--ease);
    z-index:49;
  }
  .nav ul.open a{
    padding:8px 0;
    font-size:16px;
  }
  .g2,.g3,.g4{
    grid-template-columns:1fr;
  }
  .search input{
    width:100px;
  }
  .slide{
    padding:26px 20px;
  }
  .slide h1{
    font-size:23px;
  }
  .slide h2{
    font-size:20px;
  }
  .dots{
    left:20px;
    bottom:10px;
  }
  h2{
    font-size:20px;
  }
  h3{
    font-size:17px;
  }
  .foot-grid{
    grid-template-columns:1fr;
    gap:18px;
  }
  .copy{
    flex-direction:column;
  }
  table{
    font-size:14px;
  }
  th,td{
    padding:8px 10px;
  }
  #toTop{
    right:14px;
    bottom:14px;
    width:40px;
    height:40px;
  }
  .author-box{
    flex-direction:column;
    align-items:center;
    text-align:center;
  }
}

@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.site,#toTop,.nav-tools,.menu-toggle,.dots,.banner{
    display:none !important;
  }
  body{
    background:#fff;
    color:#000;
  }
  .card{
    box-shadow:none;
    border:1px solid #ccc;
  }
  .reveal{
    opacity:1;
    transform:none;
  }
}