*,::after,::before{box-sizing:border-box;margin:0;padding:0}
:root{--wps-red:#FF4B4B;--wps-red-dark:#e03333;--wps-orange:#FF6B35;--text-primary:#1a1a1a;--text-secondary:#555;--text-muted:#888;--bg-white:#fff;--bg-light:#f7f8fa;--bg-card:#f0f2f5;--border:#e8e8e8;--border-light:#f0f0f0;--header-h:64px;--container:1200px;--radius:24px;--radius-sm:999px;--shadow:0 4px 24px rgba(0,0,0,0.08);--shadow-md:0 8px 40px rgba(0,0,0,0.12);--transition:0.2s ease}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--text-primary);background:var(--bg-white);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
button{border:none;background:0 0;cursor:pointer;font-family:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(255,255,255,.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-light);z-index:1000;transition:box-shadow var(--transition)}
.header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.08)}
.header-inner{max-width:var(--container);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:32px}
.logo img{height:24px;width:auto}
.nav{display:flex;align-items:center;gap:4px;flex:1}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:6px 12px;font-size:14px;color:var(--text-primary);border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition),color var(--transition);white-space:nowrap}
.nav-link:hover{background:var(--bg-light)}
.nav-ai{color:#7c3aed;font-weight:500}
.ai-star{font-size:10px}
.chevron{transition:transform var(--transition)}
.nav-item:hover .chevron{transform:rotate(180deg)}
.dropdown{display:none;position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-25%);background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:20px;gap:24px;min-width:1080px;grid-template-columns:repeat(4,1fr)}
.dropdown-resources{min-width:520px;grid-template-columns:repeat(3,1fr)}
.dropdown::before{content:""}
.nav-item:hover .dropdown{display:grid}
.nav-item.active .dropdown{display:grid}
.dropdown-col{display:flex;flex-direction:column;gap:6px}
.dropdown-group{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.dropdown-group strong{font-size:13px;font-weight:600;color:var(--text-primary)}
.dropdown-col a{font-size:13px;color:var(--text-secondary);padding:3px 0;transition:color var(--transition)}
.dropdown-col a:hover{color:var(--wps-red)}
.badge-new{background:#fff0f0;color:var(--wps-red);font-size:10px;font-weight:600;padding:2px 6px;border-radius:4px;text-transform:uppercase;letter-spacing:.05em}
.header-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.btn-download-nav{padding:8px 18px;background:var(--wps-red);color:#fff;font-size:14px;font-weight:500;border-radius:var(--radius-sm);transition:background var(--transition),transform var(--transition)}
.btn-download-nav:hover{background:var(--wps-red-dark);transform:translateY(-1px)}
.btn-login{padding:8px 18px;border:1px solid var(--border);font-size:14px;border-radius:var(--radius-sm);color:var(--text-primary);transition:background var(--transition)}
.btn-login:hover{background:var(--bg-light)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.mobile-toggle span{display:block;width:22px;height:2px;background:var(--text-primary);border-radius:2px;transition:var(--transition)}
.hero{padding-top:calc(var(--header-h) + 60px);padding-bottom:60px;background:linear-gradient(160deg,#fff8f8 0,#fff 40%,#f8f5ff 100%);overflow:hidden;text-align:center}
.hero-inner{max-width:var(--container);margin:0 auto;padding:0 24px;display:flex;justify-content:center;align-items:center;flex-direction:column;gap:60px}
.hero-logo{height:72px;width:auto;margin:0 auto 20px}
.hero-text h1{font-size:52px;font-weight:700;line-height:1.25;color:var(--text-primary);margin-bottom:16px;letter-spacing:-.02em}
.hero-sub{font-size:16px;color:var(--text-secondary);margin-bottom:32px;line-height:1.7;font-weight:400}
.hero-actions{display:flex;flex-direction:column;align-items:center;gap:10px;margin-bottom:40px}
.hero-actions .btn-group{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:10px}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;background:var(--wps-red);color:#fff;font-size:16px;font-weight:600;border-radius:var(--radius-sm);transition:background var(--transition),transform var(--transition),box-shadow var(--transition)}
.btn-primary:hover{background:var(--wps-red-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,75,75,.3)}
.hero-note{font-size:13px;color:var(--text-muted)}
.hero-stats{display:flex;justify-content:center;align-items:center;gap:20px}
.stat{text-align:center}
.stat strong{display:block;font-size:20px;font-weight:700;color:var(--text-primary)}
.stat span{font-size:12px;color:var(--text-muted)}
.stat-divider{width:1px;height:32px;background:var(--border)}
.hero-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:420px 320px;grid-template-areas:"doc pdf slides" "doc sheet photos";gap:12px}
.product-card{border-radius:var(--radius);overflow:hidden;position:relative;background:var(--bg-card);cursor:pointer;transition:transform var(--transition),box-shadow var(--transition)}
.product-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.card-doc{grid-area:doc;background:#e0e4f4}
.card-pdf{grid-area:pdf;background:#fdecd4}
.card-slides{grid-area:slides;background:#f9d5ca}
.card-sheet{grid-area:sheet;background:#d4edda}
.card-photo{grid-area:photos;background:#e4dbf0}
.card-header{padding:24px 24px 10px;position:relative;z-index:1}
.card-title-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.card-left{display:flex;justify-content:start;align-items:center;gap:4px}
.card-label{font-size:22px;font-weight:600;color:var(--text-primary)}
.card-icons{display:flex;gap:4px;align-items:center}
.spell-check-demo{background:#fff;border-radius:8px;padding:10px 12px;font-size:11px;color:var(--text-primary);line-height:1.5}
.strikethrough{text-decoration:line-through;color:#f87171}
.corrected{color:#22c55e;font-weight:600}
.clarity-bar{display:flex;align-items:center;gap:6px;margin-top:6px}
.tag-clarity{background:#fff0f0;color:var(--wps-red);font-size:10px;padding:2px 6px;border-radius:4px}
.tag-ambiguity{background:#fff7ed;color:#ea580c;font-size:10px;padding:2px 6px;border-radius:4px}
.card-bg{width:100%;height:auto;object-fit:cover;display:block}
.trust-badges{margin-top:48px;overflow:hidden;mask-image:linear-gradient(90deg,transparent 0%,#000 10%,#000 90%,transparent 100%);-webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 10%,#000 90%,transparent 100%)}
.trust-track{display:flex;justify-content:center;align-items:center;gap:40px}
.trust-track img{width:76px;height:48px;object-fit:contain}
.section-title{font-size:clamp(22px, 3vw, 36px);font-weight:700;color:var(--text-primary);text-align:center;margin-bottom:12px;letter-spacing:-.02em}
.section-subtitle{text-align:center;color:var(--text-secondary);font-size:16px;margin-bottom:40px}
.section-desc{text-align:center;color:var(--text-secondary);font-size:16px;max-width:700px;margin:0 auto 48px;line-height:1.7}
.slider-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--bg-white);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background var(--transition),box-shadow var(--transition);flex-shrink:0;font-size:20px;color:var(--text-secondary)}
.slider-btn:hover{background:var(--bg-light);box-shadow:var(--shadow)}
.ai-section{padding:80px 0;background:var(--bg-white)}
.ai-slider-wrapper{display:flex;align-items:center;gap:16px;margin-top:40px}
.ai-slider{flex:1;overflow:hidden;border-radius:var(--radius)}
.ai-slide{display:none}
.ai-slide.active{display:block}
.ai-slide-content{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:center;background:var(--bg-light);border-radius:var(--radius);padding:48px;min-height:360px}
.ai-slide-text h3{font-size:22px;font-weight:700;margin-bottom:16px;line-height:1.3;letter-spacing:-.01em}
.ai-slide-text p{font-size:15px;color:var(--text-secondary);line-height:1.7}
.ai-slide-img{border-radius:10px;overflow:hidden;background:var(--border);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center}
.ai-slide-img img{width:100%;height:100%;object-fit:cover}
.slider-dots{display:flex;justify-content:center;gap:8px;margin-top:20px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--border);cursor:pointer;transition:background var(--transition),transform var(--transition)}
.dot.active{background:var(--wps-red);transform:scale(1.2)}
.compat-section{padding:80px 0;background:var(--bg-light)}
.compat-slider-wrapper{display:flex;flex-direction:column;gap:0;position:relative}
.compat-tabs{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:32px}
.tab-btn{padding:8px 16px;font-size:13px;border:1px solid var(--border);border-radius:99px;background:var(--bg-white);color:var(--text-secondary);cursor:pointer;transition:all var(--transition);font-family:inherit}
.tab-btn:hover{border-color:var(--wps-red);color:var(--wps-red)}
.tab-btn.active{background:var(--wps-red);color:#fff;border-color:var(--wps-red)}
.compat-slides{position:relative}
.compat-slide{display:none}
.compat-slide.active{display:block}
.compat-slide-inner{display:grid;grid-template-columns:1fr 1.4fr;gap:60px;align-items:center;background:var(--bg-white);border-radius:var(--radius);padding:52px;box-shadow:var(--shadow)}
.compat-text h3{font-size:22px;font-weight:700;margin-bottom:16px;line-height:1.3;letter-spacing:-.01em}
.compat-text p{font-size:15px;color:var(--text-secondary);line-height:1.7}
.compat-slide-inner>img{width:100%;border-radius:10px;object-fit:contain}
.compat-slider-wrapper .slider-btn{position:absolute;top:50%;transform:translateY(-50%);z-index:10}
.compat-slider-wrapper .prev{left:-20px}
.compat-slider-wrapper .next{right:-20px}
.privacy-section{padding:80px 0;background:var(--bg-white)}
.privacy-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px}
.privacy-card{background:var(--bg-light);border-radius:var(--radius);padding:36px 28px;text-align:center;transition:box-shadow var(--transition),transform var(--transition)}
.privacy-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.privacy-card img{margin:0 auto 20px}
.privacy-card h3{font-size:18px;font-weight:700;margin-bottom:12px}
.privacy-card p{font-size:14px;color:var(--text-secondary);line-height:1.7}
.testimonials-section{padding:80px 0;background:var(--bg-light)}
.testimonials-wrapper{display:flex;align-items:center;gap:16px}
.testimonials-track{flex:1;display:grid;grid-template-columns:repeat(3,1fr);gap:16px;overflow:hidden}
.testimonial-card{background:var(--bg-white);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:12px;transition:box-shadow var(--transition)}
.testimonial-card:hover{box-shadow:var(--shadow-md)}
.testimonial-card img{width:48px;height:48px;border-radius:50%;object-fit:cover;background:var(--border)}
.testimonial-card blockquote{font-size:13px;color:var(--text-secondary);line-height:1.6;font-style:italic;flex:1}
.testimonial-card strong{font-size:14px;font-weight:600;color:var(--text-primary)}
.testimonial-card span{font-size:12px;color:var(--text-muted)}
.faq-section{padding:80px 0;background:var(--bg-white)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 0;font-size:16px;font-weight:500;color:var(--text-primary);text-align:left;cursor:pointer;gap:16px;font-family:inherit;transition:color var(--transition)}
.faq-q:hover{color:var(--wps-red)}
.faq-icon{font-size:22px;font-weight:300;color:var(--text-muted);flex-shrink:0;transition:transform var(--transition),color var(--transition);line-height:1}
.faq-q[aria-expanded=true] .faq-icon{transform:rotate(45deg);color:var(--wps-red)}
.faq-a{display:none;padding:0 0 20px}
.faq-a.open{display:block}
.faq-a p{font-size:15px;color:var(--text-secondary);line-height:1.7}
.faq-a a{color:var(--wps-red);text-decoration:underline}
.cta-section{padding:80px 0;background:var(--bg-light)}
.cta-inner{text-align:center;display:flex;flex-direction:column;align-items:center;gap:24px}
.cta-inner h2{font-size:clamp(20px, 3vw, 32px);font-weight:700;letter-spacing:-.02em}
.footer{background:#1a1a1a;color:#ccc;padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:32px;padding-bottom:48px;border-bottom:1px solid #333}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:8px}
.footer-col a{font-size:13px;color:#999;transition:color var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{padding:24px 0;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.footer-bottom p{font-size:12px;color:#666;flex:1}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:12px;color:#666;transition:color var(--transition)}
.footer-links a:hover{color:#fff}
@keyframes fadeInUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:translateY(0)}
}
.hero-text{animation:fadeInUp .6s ease both}
.hero-cards{animation:fadeInUp .6s ease .2s both}
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero-cards{margin:0 auto}
  .footer-grid{grid-template-columns:repeat(3,1fr)}
  .compat-slider-wrapper .prev{left:0}
  .compat-slider-wrapper .next{right:0}
  .compat-slide-inner{grid-template-columns:1fr;padding:32px;gap:32px}
}
@media (max-width:768px){
  :root{--header-h:56px}
  .nav{display:none}
  .header-actions .btn-login{display:none}
  .mobile-toggle{display:flex}
  .nav.open{display:flex;position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:var(--bg-white);padding:24px;gap:8px;z-index:999}
  .hero{padding-top:calc(var(--header-h) + 40px)}
  .hero-text h1{font-size:26px}
  .hero-cards{grid-template-columns:1fr}
  .ai-slide-content{grid-template-columns:1fr;padding:24px;min-height:auto}
  .ai-slide-img{aspect-ratio:16/9}
  .privacy-cards{grid-template-columns:1fr}
  .testimonials-track{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .hero-stats{flex-wrap:wrap;gap:12px}
  .dropdown{min-width:90vw;left:0;transform:none}
  .compat-tabs{gap:6px}
  .tab-btn{font-size:12px;padding:6px 12px}
}
@media (max-width:480px){
  .card-doc,.card-pdf,.card-photo,.card-sheet,.card-slides{grid-column:1;grid-row:auto}
  .footer-grid{grid-template-columns:1fr}
}