:root{
  --brand:#e63946;
  --brand-d:#c1121f;
  --brand-2:#7b2cbf;
  --brand-3:#2a9d8f;
  --accent:#ffb703;
  --bg:#ffffff;
  --bg-soft:#f7f7fb;
  --fg:#1d1d1f;
  --muted:#5f6368;
  --line:#e8e8ed;
  --card:#fafafc;
  --glass:rgba(255,255,255,.68);
  --glass-border:rgba(255,255,255,.55);
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 8px 30px rgba(20,20,40,.08);
  --shadow-lg:0 18px 50px rgba(20,20,40,.14);
  --grad-hero:linear-gradient(135deg,#e63946 0%,#7b2cbf 55%,#2a9d8f 100%);
  --grad-brand:linear-gradient(120deg,#e63946,#c1121f);
  --ease:cubic-bezier(.22,.61,.36,1);
}
[data-theme="dark"]{
  --bg:#0e1014;
  --bg-soft:#14171d;
  --fg:#f2f3f5;
  --muted:#a0a4ab;
  --line:#242830;
  --card:#171a20;
  --glass:rgba(23,26,32,.62);
  --glass-border:rgba(255,255,255,.08);
  --shadow:0 8px 30px rgba(0,0,0,.55);
  --shadow-lg:0 18px 50px rgba(0,0,0,.7);
  --grad-hero:linear-gradient(135deg,#3a0ca3 0%,#7b1d24 55%,#0f4c45 100%);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(1200px 600px at 85% -10%,rgba(123,44,191,.10),transparent 60%),
    radial-gradient(900px 500px at 0% 0%,rgba(230,57,70,.10),transparent 55%),
    var(--bg);
  color:var(--fg);
  line-height:1.75;
  font-size:16px;
  letter-spacing:.1px;
  transition:background .35s var(--ease),color .35s var(--ease);
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease),opacity .25s var(--ease)}
img,svg{display:block;max-width:100%}
ul{list-style:none}
::selection{background:var(--brand);color:#fff}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}

/* ===== Header ===== */
header.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--glass);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  transition:box-shadow .35s var(--ease),background .35s var(--ease);
}
header.site-header.scrolled{box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--brand);white-space:nowrap;letter-spacing:.3px}
.logo svg{width:34px;height:34px;border-radius:10px;box-shadow:0 6px 16px rgba(230,57,70,.35);transition:transform .4s var(--ease)}
.logo:hover svg{transform:rotate(-8deg) scale(1.06)}
.nav-links{display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.nav-links a{font-size:15px;color:var(--fg);opacity:.8;position:relative;padding:4px 0}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:2px;
  background:var(--grad-brand);transition:width .3s var(--ease);
}
.nav-links a:hover{opacity:1;color:var(--brand)}
.nav-links a:hover::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:10px}
.search-box{
  display:flex;align-items:center;gap:4px;
  border:1px solid var(--line);border-radius:999px;padding:5px 6px 5px 14px;
  background:var(--card);transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px rgba(230,57,70,.14)}
.search-box input{border:none;outline:none;background:transparent;color:var(--fg);width:130px;font-size:14px}
.search-box input::placeholder{color:var(--muted)}
.search-box button{
  border:none;background:var(--grad-brand);cursor:pointer;color:#fff;font-size:13px;font-weight:700;
  padding:6px 12px;border-radius:999px;transition:transform .25s var(--ease),filter .25s var(--ease);
}
.search-box button:hover{transform:translateY(-1px);filter:brightness(1.08)}
.icon-btn{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:var(--card);
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--fg);
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
}
.icon-btn:hover{transform:translateY(-2px);color:var(--brand);border-color:var(--brand)}
.menu-toggle{display:none}

/* ===== Breadcrumb ===== */
.breadcrumb{
  font-size:13px;color:var(--muted);padding:16px 0;border-bottom:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:6px;align-items:center;
}
.breadcrumb a{color:var(--brand);font-weight:600}
.breadcrumb a:hover{text-decoration:underline}

/* ===== Hero ===== */
.hero{position:relative;padding:64px 0 44px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:-20% -10% auto -10%;height:520px;
  background:var(--grad-hero);opacity:.10;filter:blur(90px);border-radius:50%;z-index:-1;
  animation:heroFloat 14s ease-in-out infinite alternate;
}
@keyframes heroFloat{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(30px,20px,0) scale(1.08)}}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.hero h1{font-size:38px;line-height:1.28;font-weight:800;letter-spacing:-.6px;margin-bottom:18px}
.hero h1 .hl{
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
  position:relative;
}
.hero p.lead{font-size:17px;color:var(--muted);margin-bottom:26px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:999px;
  font-weight:700;font-size:15px;cursor:pointer;border:none;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),color .3s var(--ease);
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:0 10px 26px rgba(230,57,70,.32);position:relative;overflow:hidden}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);
  transform:skewX(-20deg);transition:left .7s var(--ease);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(230,57,70,.42)}
.btn-primary:hover::after{left:130%}
.btn-ghost{background:var(--card);color:var(--fg);border:1px solid var(--line)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow)}

/* ===== Carousel ===== */
.carousel{
  position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);
  background:var(--card);aspect-ratio:16/10;border:1px solid var(--glass-border);
}
.slide{
  position:absolute;inset:0;opacity:0;transition:opacity .9s var(--ease);
  display:flex;flex-direction:column;justify-content:flex-end;padding:26px;color:#fff;
}
.slide.active{opacity:1}
.slide svg{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.slide::after{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(to top,rgba(0,0,0,.55),transparent 65%);
}
.slide-content{position:relative;z-index:1;transform:translateY(8px);transition:transform .8s var(--ease)}
.slide.active .slide-content{transform:translateY(0)}
.slide-content h3{font-size:20px;margin-bottom:6px;letter-spacing:.2px}
.slide-content p{font-size:14px;opacity:.9}
.dots{position:absolute;bottom:14px;right:16px;display:flex;gap:6px;z-index:2}
.dots span{
  width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;
  transition:background .3s var(--ease),width .3s var(--ease);
}
.dots span.active{background:#fff;width:20px;border-radius:4px}

/* ===== Stats ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:40px 0 10px}
.stat{
  background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);
  padding:24px 18px;text-align:center;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.stat:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.stat .num{font-size:30px;font-weight:800;background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .label{font-size:14px;color:var(--muted);margin-top:4px}

/* ===== Sections ===== */
section{padding:56px 0;position:relative}
.section-head{max-width:780px;margin-bottom:32px}
.section-head h2{
  font-size:28px;font-weight:800;margin-bottom:12px;letter-spacing:-.4px;position:relative;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:5px;border-radius:4px;background:var(--grad-brand);
}
.section-head p{color:var(--muted);font-size:16px}

/* ===== Grids & Cards ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
  position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad-brand);
  transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease);
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card:hover::before{transform:scaleX(1)}
.card h3{font-size:18px;margin-bottom:10px;letter-spacing:.1px}
.card h4{font-size:15px;margin:14px 0 6px;color:var(--brand)}
.card p{color:var(--muted);font-size:15px}
.card ul{list-style:none}
.card ul li{margin-bottom:8px;font-size:15px;color:var(--muted)}
.card ul li a{color:var(--fg);opacity:.85}
.card ul li a:hover{color:var(--brand);opacity:1}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ===== Article cards ===== */
.article-card{display:flex;flex-direction:column;gap:8px}
.article-card .meta{font-size:13px;color:var(--brand);font-weight:700;letter-spacing:.2px}
.article-card h3{font-size:17px;line-height:1.5}
.article-card p{flex:1}
.article-card .more{color:var(--brand);font-weight:700;font-size:14px;margin-top:auto;transition:transform .3s var(--ease)}
.article-card:hover .more{transform:translateX(4px)}

/* ===== Timeline ===== */
.timeline{position:relative;padding-left:24px;border-left:2px solid var(--line)}
.timeline li{list-style:none;margin-bottom:22px;position:relative}
.timeline li::before{
  content:"";position:absolute;left:-31px;top:6px;width:12px;height:12px;border-radius:50%;
  background:var(--grad-brand);box-shadow:0 0 0 4px rgba(230,57,70,.15);
}
.timeline .year{font-weight:800;color:var(--brand);font-size:15px}
.timeline p{color:var(--muted);font-size:15px}

/* ===== Testimonials ===== */
.testimonial{
  background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);padding:24px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.testimonial:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.testimonial p{color:var(--muted);font-size:15px;font-style:italic}
.testimonial .who{display:flex;align-items:center;gap:12px;margin-top:16px}
.avatar{
  width:44px;height:44px;border-radius:50%;background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0;
  box-shadow:0 6px 16px rgba(230,57,70,.32);
}
.testimonial .who .name{font-weight:700;font-size:14px}
.testimonial .who .role{font-size:13px;color:var(--muted)}

/* ===== HowTo ===== */
.howto-step{display:flex;gap:18px;margin-bottom:24px}
.howto-step .idx{
  flex:0 0 44px;height:44px;border-radius:50%;background:var(--grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;
  box-shadow:0 8px 20px rgba(230,57,70,.32);transition:transform .35s var(--ease);
}
.howto-step:hover .idx{transform:scale(1.08) rotate(-6deg)}
.howto-step h3{font-size:17px;margin-bottom:6px}
.howto-step p{color:var(--muted);font-size:15px}

/* ===== Table ===== */
table{
  width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius-sm);
  overflow:hidden;font-size:15px;border:1px solid var(--line);
}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--grad-brand);color:#fff;font-weight:700;font-size:14px;letter-spacing:.2px}
td{color:var(--muted)}
tbody th{background:transparent;color:var(--brand);font-weight:700;white-space:nowrap}
tr:last-child td,tr:last-child th{border-bottom:none}
tbody tr{transition:background .25s var(--ease)}
tbody tr:hover{background:rgba(230,57,70,.05)}

/* ===== Tags ===== */
.tags{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  padding:8px 16px;border-radius:999px;background:var(--card);border:1px solid var(--line);
  font-size:14px;color:var(--muted);cursor:default;
  transition:transform .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease),background .3s var(--ease);
}
.tag:hover{transform:translateY(-3px);color:#fff;background:var(--grad-brand);border-color:transparent}

/* ===== FAQ ===== */
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden;
  background:var(--card);transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.faq-item:hover{border-color:rgba(230,57,70,.4)}
.faq-item.open{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:none;padding:18px 20px;
  font-size:16px;font-weight:700;color:var(--fg);cursor:pointer;
  display:flex;justify-content:space-between;gap:12px;align-items:center;
  transition:color .25s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q .plus{color:var(--brand);font-size:22px;line-height:1;transition:transform .35s var(--ease);flex-shrink:0}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s var(--ease)}
.faq-a p{padding:0 20px 18px;color:var(--muted);font-size:15px}

/* ===== Footer ===== */
footer.site-footer{
  border-top:1px solid var(--line);background:var(--glass);padding:48px 0 24px;margin-top:24px;
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px;margin-bottom:30px}
.footer-grid h4{font-size:15px;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-grid h4::after{
  content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;border-radius:2px;background:var(--grad-brand);
}
.footer-grid li{margin-bottom:9px;font-size:14px;color:var(--muted)}
.footer-grid a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:var(--muted);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
}

/* ===== Back to top ===== */
.back-top{
  position:fixed;right:22px;bottom:22px;width:48px;height:48px;border-radius:50%;
  background:var(--grad-brand);color:#fff;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .35s var(--ease),transform .35s var(--ease);
  z-index:90;box-shadow:0 10px 24px rgba(230,57,70,.42);
}
.back-top.show{opacity:1;pointer-events:auto}
.back-top:hover{transform:translateY(-4px) scale(1.05)}

/* ===== Responsive ===== */
@media(max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:30px}
  .hero p.lead{max-width:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .nav-links.open{
    display:flex;position:absolute;top:66px;left:0;right:0;background:var(--glass);
    flex-direction:column;padding:18px 20px;border-bottom:1px solid var(--line);gap:14px;
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    box-shadow:var(--shadow);animation:menuIn .3s var(--ease);
  }
  @keyframes menuIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
  .menu-toggle{display:flex}
}
@media(max-width:640px){
  .grid-3,.grid-2,.footer-grid{grid-template-columns:1fr}
  .search-box{display:none}
  .hero{padding:44px 0 30px}
  .hero h1{font-size:26px}
  .hero p.lead{font-size:15.5px}
  .stats{grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
  .stat{padding:18px 12px}
  .stat .num{font-size:24px}
  .section-head h2{font-size:23px}
  section{padding:44px 0}
  .card{padding:22px}
  .btn{padding:11px 20px;font-size:14px}
  .back-top{right:16px;bottom:16px;width:44px;height:44px}
  .footer-bottom{flex-direction:column}
}

/* ===== Reduced motion ===== */
@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}
}