:root{--brand:#e63946;--brand-dark:#b52d38;--brand-light:#ff6b7a;--bg:#fff7f8;--bg-alt:#fff;--text:#2b1a1d;--text-soft:#6b555a;--border:rgba(230,57,70,.14);--card:rgba(255,255,255,.72);--card-solid:#fff;--shadow:0 10px 30px rgba(180,40,60,.10);--shadow-lg:0 20px 50px rgba(180,40,60,.16);--radius:20px;--radius-sm:12px;--header-h:74px;--ease:cubic-bezier(.22,.61,.36,1)}
[data-theme="dark"]{--brand:#ff5c6c;--brand-dark:#e63946;--brand-light:#ff8b96;--bg:#14090c;--bg-alt:#1d1013;--text:#f7e9eb;--text-soft:#c2a3a8;--border:rgba(255,92,108,.22);--card:rgba(38,20,24,.66);--card-solid:#241318;--shadow:0 10px 30px rgba(0,0,0,.45);--shadow-lg:0 20px 50px rgba(0,0,0,.6)}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;color:var(--text);background:var(--bg);background-image:radial-gradient(900px 500px at 10% -5%,rgba(230,57,70,.10),transparent 60%),radial-gradient(800px 500px at 95% 0%,rgba(255,107,122,.12),transparent 55%);background-attachment:fixed;transition:background-color .4s var(--ease),color .4s var(--ease);overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .25s var(--ease)}
a:hover,a:focus-visible{color:var(--brand-dark);text-decoration:underline}
p{margin:0 0 1em}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;font-weight:800;letter-spacing:.2px}
h1{font-size:clamp(1.6rem,4.2vw,2.6rem)}
h2{font-size:clamp(1.35rem,3.2vw,2rem)}
h3{font-size:clamp(1.12rem,2.4vw,1.45rem)}
h4{font-size:1.05rem}
ul,ol{padding-left:1.3em;margin:0 0 1em}
li{margin:.35em 0}
blockquote{margin:0 0 1em;padding:16px 20px;border-left:4px solid var(--brand);background:var(--card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-soft);font-style:italic}
blockquote p:last-child{margin-bottom:0}
:focus-visible{outline:3px solid var(--brand-light);outline-offset:2px;border-radius:6px}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

#site-header{position:sticky;top:0;z-index:100;background:rgba(255,247,248,.72);backdrop-filter:blur(18px) saturate(1.6);-webkit-backdrop-filter:blur(18px) saturate(1.6);border-bottom:1px solid var(--border);transition:background-color .4s var(--ease),box-shadow .3s var(--ease)}
[data-theme="dark"] #site-header{background:rgba(20,9,12,.72)}
#site-header.is-scrolled{box-shadow:var(--shadow)}
.header-inner{max-width:1200px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:18px;flex-wrap:wrap;min-height:var(--header-h)}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:900;font-size:1.18rem;color:var(--text);letter-spacing:.5px}
.logo:hover{text-decoration:none;color:var(--brand)}
.logo svg{flex:none;filter:drop-shadow(0 4px 10px rgba(230,57,70,.35));transition:transform .5s var(--ease)}
.logo:hover svg{transform:rotate(-8deg) scale(1.08)}
#site-header nav{flex:1 1 auto;min-width:0}
#site-header nav ul{display:flex;flex-wrap:wrap;gap:4px;list-style:none;margin:0;padding:0}
#site-header nav a{display:inline-block;padding:7px 12px;border-radius:999px;font-size:.92rem;color:var(--text-soft);font-weight:600;transition:background-color .25s var(--ease),color .25s var(--ease),transform .25s var(--ease)}
#site-header nav a:hover,#site-header nav a:focus-visible{background:rgba(230,57,70,.10);color:var(--brand);text-decoration:none;transform:translateY(-2px)}
#site-header form[role="search"]{display:flex;gap:8px;align-items:center;flex:0 1 260px}
#site-header input[type="search"]{flex:1;min-width:0;padding:9px 14px;border:1px solid var(--border);border-radius:999px;background:var(--card-solid);color:var(--text);font-size:.9rem;transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
#site-header input[type="search"]::placeholder{color:var(--text-soft);opacity:.75}
#site-header input[type="search"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(230,57,70,.14)}
#site-header button[type="submit"]{padding:9px 18px;border:0;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand-light));color:#fff;font-weight:700;font-size:.9rem;cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
#site-header button[type="submit"]:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(230,57,70,.35)}

main{max-width:1200px;margin:0 auto;padding:0 20px}
main section{margin:0 0 34px;padding:34px clamp(18px,3.4vw,44px);background:var(--card);backdrop-filter:blur(14px) saturate(1.4);-webkit-backdrop-filter:blur(14px) saturate(1.4);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:background-color .4s var(--ease),border-color .4s var(--ease),box-shadow .35s var(--ease),transform .35s var(--ease)}
main section:hover{box-shadow:var(--shadow-lg)}
main section:first-of-type{margin-top:26px}
#banner{margin-top:26px;padding:clamp(30px,5vw,64px) clamp(20px,4vw,56px);background:linear-gradient(135deg,rgba(230,57,70,.96) 0%,rgba(255,107,122,.92) 45%,rgba(255,160,120,.9) 100%);border:0;color:#fff;position:relative;overflow:hidden;isolation:isolate}
#banner::before,#banner::after{content:"";position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;z-index:-1;pointer-events:none}
#banner::before{width:420px;height:420px;background:rgba(255,255,255,.35);top:-160px;right:-120px;animation:float 12s ease-in-out infinite}
#banner::after{width:360px;height:360px;background:rgba(255,214,120,.5);bottom:-160px;left:-100px;animation:float 15s ease-in-out infinite reverse}
#banner h1{color:#fff;text-shadow:0 4px 22px rgba(120,10,25,.35);max-width:900px}
#banner>p{color:rgba(255,255,255,.95);max-width:860px;font-size:1.02rem}
#banner a[href="#download"]{display:inline-block;margin-top:8px;padding:13px 30px;border-radius:999px;background:#fff;color:var(--brand);font-weight:800;box-shadow:0 12px 28px rgba(120,10,25,.28);transition:transform .3s var(--ease),box-shadow .3s var(--ease),background-color .3s var(--ease)}
#banner a[href="#download"]:hover{transform:translateY(-3px) scale(1.03);text-decoration:none;box-shadow:0 18px 36px rgba(120,10,25,.36)}
.banner-slides{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin:26px 0 22px}
.banner-slides article{padding:20px 22px;border-radius:var(--radius-sm);background:rgba(255,255,255,.18);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.35);transition:transform .35s var(--ease),background-color .35s var(--ease)}
.banner-slides article:hover{transform:translateY(-6px);background:rgba(255,255,255,.28)}
.banner-slides h2{font-size:1.18rem;color:#fff;margin-bottom:.35em}
.banner-slides p{margin:0;color:rgba(255,255,255,.94);font-size:.94rem}

nav[aria-label="面包屑导航"]{margin:18px 0 0;padding:0;background:none;border:0;box-shadow:none}
nav[aria-label="面包屑导航"] ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0;padding:0;font-size:.88rem;color:var(--text-soft)}
nav[aria-label="面包屑导航"] li+li::before{content:"/";margin-right:6px;color:var(--border);opacity:.9}

#intro h3,#products h3,#solutions h3,#cases h3,#news h3,#howto h3,#eeat h3,#contact h3{margin-top:1.6em;padding-left:14px;position:relative}
#intro h3::before,#products h3::before,#solutions h3::before,#cases h3::before,#news h3::before,#howto h3::before,#eeat h3::before,#contact h3::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:5px;border-radius:4px;background:linear-gradient(180deg,var(--brand),var(--brand-light))}
#products h4,#solutions h4{margin-top:1.2em;color:var(--brand-dark)}
[data-theme="dark"] #products h4,[data-theme="dark"] #solutions h4{color:var(--brand-light)}

#cases blockquote{transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
#cases blockquote:hover{transform:translateX(6px);box-shadow:var(--shadow)}

#news article,#articles article{padding:20px 22px;margin-bottom:16px;border-radius:var(--radius-sm);background:var(--card-solid);border:1px solid var(--border);transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
#news article:hover,#articles article:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(230,57,70,.4)}
#news article h3,#articles article h3{margin-top:0}
#news article p:nth-of-type(1),#articles article p:nth-of-type(1){font-size:.85rem;color:var(--text-soft);margin-bottom:.5em}
#articles article a{display:inline-block;margin-top:6px;font-weight:700;font-size:.92rem}
#articles article a::after{content:" →";transition:transform .25s var(--ease);display:inline-block}
#articles article a:hover::after{transform:translateX(4px)}

#faq details{margin-bottom:12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--card-solid);overflow:hidden;transition:box-shadow .3s var(--ease),border-color .3s var(--ease)}
#faq details[open]{box-shadow:var(--shadow);border-color:rgba(230,57,70,.38)}
#faq summary{padding:16px 48px 16px 20px;font-weight:700;cursor:pointer;position:relative;list-style:none;transition:background-color .25s var(--ease),color .25s var(--ease)}
#faq summary::-webkit-details-marker{display:none}
#faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.4rem;font-weight:400;color:var(--brand);transition:transform .3s var(--ease)}
#faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
#faq summary:hover{background:rgba(230,57,70,.07);color:var(--brand)}
#faq details p{margin:0;padding:0 20px 18px;color:var(--text-soft);animation:fadeUp .35s var(--ease)}

#howto ol{counter-reset:step;list-style:none;padding-left:0}
#howto ol li{counter-increment:step;position:relative;padding:12px 16px 12px 58px;margin-bottom:10px;border-radius:var(--radius-sm);background:var(--card-solid);border:1px solid var(--border);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
#howto ol li::before{content:counter(step);position:absolute;left:14px;top:50%;transform:translateY(-50%);width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-light));color:#fff;font-weight:800;font-size:.9rem}
#howto ol li:hover{transform:translateX(6px);box-shadow:var(--shadow)}

#download{background:linear-gradient(135deg,rgba(230,57,70,.12),rgba(255,107,122,.16));text-align:center}
#download h2{color:var(--brand-dark)}
[data-theme="dark"] #download h2{color:var(--brand-light)}

#contact ul,#sitemap ul,#links ul{list-style:none;padding-left:0}
#contact ul li,#sitemap ul li,#links ul li{padding:9px 14px;margin-bottom:8px;border-radius:var(--radius-sm);background:var(--card-solid);border:1px solid var(--border);transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease)}
#contact ul li:hover,#sitemap ul li:hover,#links ul li:hover{transform:translateX(6px);border-color:rgba(230,57,70,.4);box-shadow:var(--shadow)}
#sitemap ul,#links ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px}
#links ul li a{font-weight:600}

#legal p:last-child{margin-top:1.6em;padding-top:16px;border-top:1px dashed var(--border);text-align:center;color:var(--text-soft);font-size:.9rem}

footer{max-width:1200px;margin:0 auto 40px;padding:28px 20px;text-align:center;color:var(--text-soft);font-size:.92rem;border-top:1px solid var(--border)}
footer p{margin:.3em 0}
footer a{font-weight:700}

#back-to-top,#theme-toggle{position:fixed;right:20px;z-index:120;border:1px solid var(--border);border-radius:999px;background:var(--card);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);color:var(--text);font-weight:700;font-size:.85rem;cursor:pointer;box-shadow:var(--shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease),background-color .3s var(--ease),color .3s var(--ease),opacity .3s var(--ease)}
#theme-toggle{bottom:20px;padding:11px 20px}
#back-to-top{bottom:74px;padding:11px 18px;opacity:0;visibility:hidden;transform:translateY(14px)}
#back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
#back-to-top:hover,#theme-toggle:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);color:var(--brand);border-color:rgba(230,57,70,.45)}

main section{opacity:0;transform:translateY(28px);animation:reveal .8s var(--ease) forwards}
main section:nth-of-type(1){animation-delay:.05s}
main section:nth-of-type(2){animation-delay:.1s}
main section:nth-of-type(3){animation-delay:.15s}
main section:nth-of-type(4){animation-delay:.2s}
main section:nth-of-type(5){animation-delay:.25s}
main section:nth-of-type(n+6){animation-delay:.3s}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

@keyframes reveal{to{opacity:1;transform:none}}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-24px,26px) scale(1.08)}}

@media (max-width:900px){
  .header-inner{flex-wrap:wrap;gap:12px}
  #site-header nav{order:3;flex-basis:100%}
  #site-header nav ul{justify-content:center}
  #site-header form[role="search"]{flex:1 1 100%;order:4}
}
@media (max-width:640px){
  body{font-size:15px}
  main{padding:0 14px}
  main section{padding:24px 18px;border-radius:16px;margin-bottom:24px}
  #banner{padding:34px 20px}
  .banner-slides{grid-template-columns:1fr}
  #site-header nav a{padding:6px 9px;font-size:.85rem}
  #back-to-top,#theme-toggle{right:12px;font-size:.78rem;padding:10px 14px}
  #back-to-top{bottom:66px}
  #theme-toggle{bottom:14px}
  #sitemap ul,#links ul{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  main section,.reveal{opacity:1!important;transform:none!important}
}
@media print{
  #site-header,#back-to-top,#theme-toggle,footer{display:none}
  body{background:#fff;color:#000}
  main section{box-shadow:none;border:1px solid #ddd}
}