:root{
  --primary:#4a3aff;
  --primary-2:#7b5cff;
  --primary-3:#b06bff;
  --accent:#ffe27a;
  --text:#1f2333;
  --text-2:#3a3f57;
  --text-3:#50566f;
  --muted:#8a90a8;
  --bg:#f7f8fc;
  --surface:#ffffff;
  --surface-2:#eef0f7;
  --border:#e8eaf2;
  --border-2:#eef0f7;
  --shadow-sm:0 2px 8px rgba(30,40,90,.05);
  --shadow-md:0 6px 22px rgba(30,40,90,.06);
  --shadow-lg:0 14px 40px rgba(30,40,90,.12);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:22px;
  --glass:rgba(255,255,255,.72);
  --glass-border:rgba(255,255,255,.5);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:64px;
}

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

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;
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  transition:background .35s var(--ease),color .35s var(--ease);
  overflow-x:hidden;
}

a{color:var(--primary);text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease)}
a:hover{text-decoration:underline}

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

::selection{background:rgba(74,58,255,.18);color:var(--text)}

:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}

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

/* ---------- Header ---------- */
header.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:1px solid var(--border);
  transition:background .35s var(--ease),border-color .35s var(--ease),box-shadow .3s var(--ease);
}
header.site-header:hover{box-shadow:0 4px 20px rgba(30,40,90,.05)}

.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:12px 0}

.logo{
  display:flex;align-items:center;gap:10px;
  font-weight:700;font-size:20px;color:var(--text);
  letter-spacing:.2px;
  transition:transform .3s var(--ease);
}
.logo:hover{text-decoration:none;transform:translateY(-1px)}
.logo svg{width:38px;height:38px;flex-shrink:0;filter:drop-shadow(0 4px 10px rgba(74,58,255,.28));transition:transform .4s var(--ease)}
.logo:hover svg{transform:rotate(-6deg) scale(1.05)}

nav.main-nav ul{display:flex;gap:22px;list-style:none;flex-wrap:wrap}
nav.main-nav a{
  color:var(--text-2);font-size:15px;position:relative;padding:4px 0;
  transition:color .22s var(--ease);
}
nav.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-3));
  border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
nav.main-nav a:hover{color:var(--primary);text-decoration:none}
nav.main-nav a:hover::after{transform:scaleX(1)}

.header-tools{display:flex;align-items:center;gap:10px}

.search-box{
  display:flex;align-items:center;
  border:1px solid var(--border);
  border-radius:22px;padding:4px 6px 4px 14px;
  background:var(--surface);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .35s var(--ease);
}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 4px rgba(74,58,255,.1)}
.search-box input{
  border:none;outline:none;font-size:14px;width:130px;
  background:transparent;color:var(--text);
  transition:width .3s var(--ease);
}
.search-box input::placeholder{color:var(--muted)}
.search-box input:focus{width:170px}
.search-box button{
  border:none;background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;border-radius:18px;padding:6px 14px;font-size:13px;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .25s var(--ease),filter .2s var(--ease);
}
.search-box button:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(74,58,255,.32);filter:brightness(1.05)}
.search-box button:active{transform:translateY(0) scale(.97)}

.btn-theme{
  border:1px solid var(--border);background:var(--surface);
  border-radius:50%;width:38px;height:38px;cursor:pointer;font-size:16px;
  display:flex;align-items:center;justify-content:center;
  transition:transform .35s var(--ease),background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.btn-theme:hover{transform:rotate(20deg) scale(1.08);box-shadow:var(--shadow-sm);border-color:var(--primary)}

.btn-menu{
  display:none;border:1px solid var(--border);background:var(--surface);
  border-radius:8px;padding:6px 12px;cursor:pointer;color:var(--text);
  transition:background .25s var(--ease),transform .2s var(--ease);
}
.btn-menu:hover{background:var(--surface-2);transform:scale(1.05)}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--muted);padding:14px 20px}
.breadcrumb a{color:var(--muted);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--primary);text-decoration:none}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(135deg,#4a3aff 0%,#7b5cff 55%,#b06bff 100%);
  color:#fff;padding:56px 0 64px;position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 20% 15%,rgba(255,255,255,.14),transparent 45%),
             radial-gradient(circle at 85% 80%,rgba(255,226,122,.12),transparent 50%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border-radius:50%;background:rgba(255,255,255,.08);
  animation:float 9s ease-in-out infinite;
}
@keyframes float{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(-18px,22px) scale(1.06)}
}

.hero-grid{
  display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
  position:relative;z-index:2;
}

.hero h1{font-size:36px;line-height:1.35;margin-bottom:18px;font-weight:800;letter-spacing:-.3px}
.hero h1 .kw{
  color:var(--accent);
  background:linear-gradient(90deg,#ffe27a,#ffd24a);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  position:relative;
}
.hero p.lead{font-size:17px;opacity:.95;margin-bottom:24px;color:rgba(255,255,255,.94)}

.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-cta a{
  display:inline-block;padding:12px 26px;border-radius:26px;
  font-weight:600;font-size:15px;
  transition:transform .25s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),color .3s var(--ease);
}
.hero-cta a:hover{text-decoration:none;transform:translateY(-3px)}
.hero-cta .primary{
  background:#fff;color:var(--primary);
  box-shadow:0 8px 24px rgba(0,0,0,.16);
}
.hero-cta .primary:hover{box-shadow:0 14px 32px rgba(0,0,0,.24)}
.hero-cta .ghost{
  border:1.5px solid rgba(255,255,255,.7);color:#fff;
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.hero-cta .ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;box-shadow:0 10px 26px rgba(0,0,0,.16)}

.hero-figure{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-radius:18px;padding:18px;
  box-shadow:0 18px 44px rgba(20,10,80,.28);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.hero-figure:hover{transform:translateY(-4px);box-shadow:0 26px 60px rgba(20,10,80,.34)}

.carousel{position:relative;border-radius:14px;overflow:hidden;background:#fff}
.carousel-track{display:flex;transition:transform .5s var(--ease)}
.carousel-slide{min-width:100%;padding:0}
.carousel-slide svg{border-radius:14px}

.carousel-dots{display:flex;justify-content:center;gap:8px;margin-top:12px}
.carousel-dots button{
  width:9px;height:9px;border-radius:50%;border:none;
  background:rgba(255,255,255,.4);cursor:pointer;
  transition:background .3s var(--ease),transform .3s var(--ease),width .3s var(--ease);
}
.carousel-dots button:hover{background:rgba(255,255,255,.7);transform:scale(1.2)}
.carousel-dots button.active{background:var(--accent);width:22px;border-radius:5px}

/* ---------- Stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  margin-top:36px;position:relative;z-index:2;
}
.stat{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-radius:14px;padding:16px;text-align:center;
  transition:transform .35s var(--ease),background .35s var(--ease),box-shadow .35s var(--ease);
}
.stat:hover{transform:translateY(-5px);background:rgba(255,255,255,.2);box-shadow:0 14px 30px rgba(20,10,80,.22)}
.stat .num{font-size:26px;font-weight:800;color:var(--accent);letter-spacing:-.5px}
.stat .label{font-size:13px;opacity:.9;margin-top:4px}

/* ---------- Sections ---------- */
section{padding:56px 0;position:relative}

section h2{
  font-size:28px;margin-bottom:8px;position:relative;padding-left:16px;
  letter-spacing:-.3px;color:var(--text);
}
section h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--primary-3));
  box-shadow:0 2px 10px rgba(74,58,255,.35);
}
section .subtitle{color:var(--muted);margin-bottom:28px;padding-left:16px}

h3{font-size:20px;margin:24px 0 10px;color:var(--text);letter-spacing:-.2px}
h4{font-size:16px;margin:18px 0 8px;color:var(--text-2)}
p{margin-bottom:14px;color:var(--text-2)}

/* ---------- Grids ---------- */
.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 ---------- */
.card{
  background:var(--surface);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-md);
  border:1px solid var(--border-2);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--primary-3));
  transform:scaleX(0);transform-origin:left;
  transition:transform .4s var(--ease);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(74,58,255,.22);
}
.card:hover::before{transform:scaleX(1)}
.card h3{margin-top:0}
.card p{font-size:15px;color:var(--text-3)}

/* ---------- Tag ---------- */
.tag{
  display:inline-block;font-size:12px;
  background:linear-gradient(135deg,rgba(74,58,255,.1),rgba(176,107,255,.12));
  color:var(--primary);
  border-radius:20px;padding:3px 12px;margin-bottom:10px;
  font-weight:600;letter-spacing:.2px;
  border:1px solid rgba(74,58,255,.14);
}

/* ---------- Anchor Nav ---------- */
.anchor-nav{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:8px}
.anchor-nav a{
  font-size:14px;background:var(--surface);
  border:1px solid var(--border);
  border-radius:20px;padding:6px 16px;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.anchor-nav a:hover{
  text-decoration:none;transform:translateY(-2px);
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;border-color:transparent;
  box-shadow:0 8px 20px rgba(74,58,255,.28);
}

/* ---------- Article List ---------- */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.article-item{
  background:var(--surface);
  border:1px solid var(--border-2);
  border-radius:14px;padding:20px;
  transition:transform .32s var(--ease),box-shadow .32s var(--ease),border-color .32s var(--ease),background .35s var(--ease);
}
.article-item:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(74,58,255,.2);
}
.article-item h3{font-size:17px;margin:0 0 8px;transition:color .25s var(--ease)}
.article-item:hover h3{color:var(--primary)}
.article-meta{font-size:12px;color:var(--muted);margin-bottom:8px}
.article-item p{font-size:14px;color:var(--text-3);margin-bottom:10px}
.read-more{font-size:14px;font-weight:600;display:inline-block;transition:transform .25s var(--ease)}
.article-item:hover .read-more{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-item{
  background:var(--surface);
  border:1px solid var(--border-2);
  border-radius:12px;margin-bottom:12px;overflow:hidden;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background .35s var(--ease);
}
.faq-item:hover{border-color:rgba(74,58,255,.24);box-shadow:var(--shadow-sm)}
.faq-item.open{border-color:rgba(74,58,255,.32);box-shadow:0 8px 26px rgba(74,58,255,.1)}

.faq-q{
  width:100%;text-align:left;background:none;border:none;
  padding:18px 20px;font-size:16px;font-weight:600;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  color:var(--text);font-family:inherit;line-height:1.6;
  transition:color .25s var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-q .icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(74,58,255,.08);color:var(--primary);
  font-size:18px;font-weight:400;line-height:1;
  transition:transform .35s var(--ease),background .3s var(--ease),color .3s var(--ease);
}
.faq-item.open .faq-q .icon{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-a-inner{padding:0 20px 18px;color:var(--text-3);font-size:15px}

/* ---------- HowTo ---------- */
.howto-step{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start}
.step-num{
  flex:0 0 40px;height:40px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:700;
  box-shadow:0 6px 16px rgba(74,58,255,.32);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.howto-step:hover .step-num{transform:scale(1.1);box-shadow:0 10px 24px rgba(74,58,255,.42)}
.howto-step h4{margin-top:6px}

/* ---------- Case ---------- */
.case-card{
  background:var(--surface);
  border-radius:var(--radius);padding:24px;
  border:1px solid var(--border-2);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(74,58,255,.2)}
.case-card blockquote{
  border-left:3px solid var(--primary);
  padding-left:14px;color:var(--text-3);font-style:italic;margin:12px 0;
  position:relative;
}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-info{list-style:none;padding:0}
.contact-info li{list-style:none;margin-bottom:10px;font-size:15px;color:var(--text-2)}
.contact-info li strong{color:var(--text)}

/* ---------- Footer ---------- */
footer.site-footer{
  background:linear-gradient(180deg,#1a1d2e,#15172a);
  color:#b9bed4;padding:48px 0 24px;font-size:14px;
  position:relative;
}
footer.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-3),var(--accent));
  opacity:.8;
}
footer.site-footer a{color:#b9bed4;transition:color .25s var(--ease)}
footer.site-footer a:hover{color:#fff;text-decoration:none}

.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;margin-bottom:32px}
footer h4{color:#fff;font-size:15px;margin-bottom:12px;letter-spacing:.3px}
footer ul{list-style:none;padding:0}
footer li{margin-bottom:8px;transition:transform .25s var(--ease)}
footer li:hover{transform:translateX(3px)}

.footer-bottom{
  border-top:1px solid #2b2f45;padding-top:18px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--muted);
}

/* ---------- Back Top ---------- */
.back-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#fff;border:none;font-size:18px;cursor:pointer;
  box-shadow:0 8px 20px rgba(74,58,255,.4);
  display:none;z-index:200;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .25s var(--ease);
}
.back-top:hover{transform:translateY(-4px) scale(1.08);box-shadow:0 14px 30px rgba(74,58,255,.5);filter:brightness(1.08)}
.back-top:active{transform:translateY(-1px) scale(.98)}

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

/* ---------- Dark Mode ---------- */
body.dark{
  --text:#d7dbe8;
  --text-2:#c3c8da;
  --text-3:#a8aec4;
  --muted:#8a90a8;
  --bg:#12141f;
  --surface:#1c2032;
  --surface-2:#232840;
  --border:#2b2f45;
  --border-2:#2b2f45;
  --shadow-md:0 6px 22px rgba(0,0,0,.3);
  --shadow-lg:0 14px 40px rgba(0,0,0,.45);
  --glass:rgba(24,27,40,.82);
  --glass-border:rgba(255,255,255,.06);
}
body.dark header.site-header{background:rgba(24,27,40,.92);border-color:var(--border)}
body.dark header.site-header:hover{box-shadow:0 4px 20px rgba(0,0,0,.35)}
body.dark .card,
body.dark .article-item,
body.dark .faq-item,
body.dark .case-card,
body.dark .search-box,
body.dark .anchor-nav a{background:var(--surface);border-color:var(--border);color:var(--text)}
body.dark h2,body.dark h3,body.dark h4,body.dark p,
body.dark .faq-q,body.dark .logo,body.dark .contact-info li,
body.dark .contact-info li strong{color:var(--text)}
body.dark .subtitle,body.dark .article-meta{color:var(--muted)}
body.dark .btn-theme,body.dark .btn-menu{background:var(--surface);border-color:var(--border);color:var(--text)}
body.dark .btn-menu:hover{background:var(--surface-2)}
body.dark .faq-q .icon{background:rgba(74,58,255,.18)}
body.dark .hero-figure{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}
body.dark .stat{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}
body.dark .stat:hover{background:rgba(255,255,255,.1)}
body.dark .card:hover,
body.dark .article-item:hover,
body.dark .case-card:hover{border-color:rgba(123,92,255,.4)}
body.dark ::selection{background:rgba(123,92,255,.35);color:#fff}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .hero h1{font-size:32px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
}

@media(max-width:920px){
  .hero-grid,
  .grid-3,
  .grid-2,
  .article-list,
  .contact-grid,
  .footer-grid,
  .stats{grid-template-columns:1fr}

  nav.main-nav{display:none}
  nav.main-nav.open{
    display:block;position:absolute;top:var(--header-h);left:0;right:0;
    background:var(--surface);padding:16px 20px;
    box-shadow:0 10px 24px rgba(0,0,0,.08);
    border-bottom:1px solid var(--border);
    animation:slideDown .3s var(--ease);
  }
  nav.main-nav.open ul{flex-direction:column;gap:12px}
  nav.main-nav.open a{display:block;padding:6px 0;font-size:16px}

  .btn-menu{display:block}
  .search-box input{width:90px}
  .search-box input:focus{width:110px}

  .hero h1{font-size:27px}
  .hero{padding:40px 0 48px}
  .hero p.lead{font-size:16px}

  section{padding:44px 0}
  section h2{font-size:23px}
  .stats{gap:12px}
  .stat{padding:14px}
}

@keyframes slideDown{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:translateY(0)}
}

@media(max-width:600px){
  body{font-size:15px}
  .container{padding:0 16px}
  .breadcrumb{padding:12px 16px;font-size:12px}
  .hero h1{font-size:23px}
  .hero-cta a{padding:10px 20px;font-size:14px;flex:1;text-align:center}
  .hero-figure{padding:12px}
  .stat .num{font-size:22px}
  .card,.case-card{padding:18px}
  .article-item{padding:16px}
  .faq-q{padding:15px 16px;font-size:15px}
  .faq-a-inner{padding:0 16px 16px;font-size:14px}
  .howto-step{gap:12px}
  .step-num{flex:0 0 34px;height:34px;font-size:14px}
  .footer-grid{gap:22px}
  .footer-bottom{flex-direction:column;font-size:12px}
  .back-top{right:16px;bottom:16px;width:42px;height:42px}
  .search-box input{width:70px}
  .search-box input:focus{width:90px}
  .logo{font-size:18px}
  .logo svg{width:34px;height:34px}
}

@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-header,nav.main-nav,.header-tools,.back-top,.hero-cta,.carousel-dots{display:none !important}
  body{background:#fff;color:#000}
  .card,.article-item,.faq-item,.case-card{box-shadow:none;border:1px solid #ddd}
  .faq-a{max-height:none !important;overflow:visible}
}