*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#e47b02;
  --primary-dark:#c96a00;
  --accent:#fb4a3e;
  --text:#3e4c59;
  --text-dark:#1f2933;
  --text-light:#7b8794;
  --bg:#ffffff;
  --bg-light:#f1f6ff;
  --bg-section:#f9f9fb;
  --border:#f1f1f1;
  --max-width:1290px;
  --font-body:'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);font-size:18px;line-height:1.7;color:var(--text);background:var(--bg)}
a{color:inherit;text-decoration:none;transition:color .2s}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}

/* Header */
.site-header{background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:70px;padding:0 24px;max-width:var(--max-width);margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:600;color:var(--text-dark)}
.logo img{width:36px;height:36px}
.nav-menu{display:flex;gap:8px}
.nav-menu a{padding:8px 16px;font-size:15px;color:var(--text-dark);letter-spacing:.5px}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary)}
.btn-download{display:inline-block;background:var(--accent);color:#fff;padding:10px 28px;border-radius:4px;font-size:14px;font-weight:500;letter-spacing:1px}
.btn-download:hover{background:#e03d32;color:#fff}
.menu-toggle{display:none;background:none;border:none;font-size:28px;cursor:pointer;color:var(--text-dark)}

/* Hero */
.hero{background:linear-gradient(135deg,#fff8f0 0%,#f1f6ff 50%,#fff 100%);padding:80px 24px 60px;text-align:center}
.hero h1{font-size:clamp(32px,5vw,56px);color:var(--text-dark);font-weight:600;margin-bottom:16px;letter-spacing:1px}
.hero .subtitle{font-size:clamp(16px,2.5vw,22px);color:var(--text-light);margin-bottom:32px}
.hero .btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;padding:16px 40px;font-size:16px;font-weight:500;border-radius:4px}
.hero .btn-primary:hover{background:var(--primary-dark);color:#fff}
.hero .btn-primary svg{width:20px;height:20px}

/* Features */
.section{padding:70px 24px}
.section-alt{background:var(--bg-section)}
.section-title{text-align:center;margin-bottom:50px}
.section-title h2{font-size:clamp(24px,3vw,36px);color:var(--text-dark);margin-bottom:10px}
.section-title h3{font-size:clamp(18px,2.5vw,28px);color:var(--primary);font-weight:500}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:40px;max-width:var(--max-width);margin:0 auto}
.feature-card{background:var(--bg);border-radius:12px;padding:36px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.feature-card h2{font-size:24px;color:var(--text-dark);margin-bottom:16px}
.feature-card ul li{padding:8px 0 8px 24px;position:relative;color:var(--text)}
.feature-card ul li::before{content:'';position:absolute;left:0;top:16px;width:8px;height:8px;background:var(--primary);border-radius:50%}
.feature-visual{background:linear-gradient(135deg,#fff3e0,#e3f2fd);border-radius:12px;height:200px;display:flex;align-items:center;justify-content:center;margin-top:24px;font-size:48px}

/* Dictionary section */
.dict-section{background:var(--bg-light);padding:70px 24px}
.dict-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:30px;max-width:var(--max-width);margin:0 auto}
.dict-item{background:var(--bg);border-radius:12px;padding:30px;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.dict-item h2{font-size:22px;color:var(--text-dark);margin-bottom:12px}
.dict-item p{color:var(--text);font-size:16px;line-height:1.8}

/* News */
.indexnews{background:var(--bg);padding:60px 24px}
.indexnews-title{text-align:center;margin-bottom:40px}
.indexnews-title h3{font-size:28px;color:var(--text-dark)}
.indexnews-title p{font-size:13px;color:var(--text-light);letter-spacing:3px;margin-top:6px}
.news-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;max-width:var(--max-width);margin:0 auto}
.news_list{background:var(--bg-section);border-radius:10px;padding:24px;transition:transform .2s,box-shadow .2s}
.news_list:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
.news_list .title{display:block;font-size:17px;font-weight:600;color:var(--text-dark);margin-bottom:10px;line-height:1.5}
.news_list .title:hover{color:var(--primary)}
.news_list .describe{color:var(--text);font-size:14px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.news_list .info{margin-top:14px}
.news_list .time{font-size:13px;color:var(--text-light)}

/* Download page */
.download-hero{text-align:center;padding:60px 24px;background:linear-gradient(135deg,#fff8f0,#f1f6ff)}
.download-hero h1{font-size:36px;color:var(--text-dark);margin-bottom:12px}
.download-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:30px;max-width:900px;margin:40px auto;padding:0 24px}
.download-card{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:40px 30px;text-align:center;transition:box-shadow .2s}
.download-card:hover{box-shadow:0 8px 30px rgba(0,0,0,.1)}
.download-card .icon{font-size:48px;margin-bottom:16px}
.download-card h3{font-size:20px;color:var(--text-dark);margin-bottom:8px}
.download-card p{font-size:14px;color:var(--text-light);margin-bottom:20px}
.download-card .btn-dl{display:inline-block;background:var(--primary);color:#fff;padding:12px 32px;border-radius:4px;font-size:15px}
.download-card .btn-dl:hover{background:var(--primary-dark);color:#fff}

/* Article */
.article-header{padding:50px 24px 30px;background:var(--bg-section);text-align:center}
.article-header h1{font-size:clamp(24px,4vw,36px);color:var(--text-dark);max-width:800px;margin:0 auto 12px}
.article-meta{font-size:14px;color:var(--text-light)}
.article-body{max-width:800px;margin:0 auto;padding:40px 24px 60px}
.article-body h2{font-size:22px;color:var(--text-dark);margin:30px 0 14px}
.article-body p{margin-bottom:16px;font-size:17px;line-height:1.85}
.article-body ul{margin:16px 0 16px 24px;list-style:disc}
.article-body ul li{margin-bottom:8px}

/* Sitemap */
.sitemap-page{padding:50px 24px 70px;max-width:800px;margin:0 auto}
.sitemap-page h1{font-size:32px;color:var(--text-dark);margin-bottom:30px;text-align:center}
.sitemap-list li{padding:12px 0;border-bottom:1px solid var(--border)}
.sitemap-list a{color:var(--primary);font-size:17px}
.sitemap-list a:hover{text-decoration:underline}
.sitemap-list .desc{font-size:14px;color:var(--text-light);margin-top:4px}

/* Footer */
.site-footer{background:var(--bg-light);padding:40px 24px 20px}
.footer-nav{text-align:center;margin-bottom:20px}
.footer-nav a{display:inline-block;padding:6px 16px;font-size:14px;color:var(--text-dark)}
.footer-nav a:hover{color:var(--primary)}
.footer-copy{text-align:center;font-size:13px;color:#85899e;padding-top:16px;border-top:1px solid var(--border)}

/* Breadcrumb */
.breadcrumb{max-width:var(--max-width);margin:0 auto;padding:16px 24px;font-size:14px;color:var(--text-light)}
.breadcrumb a{color:var(--primary)}

/* Mobile */
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:70px;left:0;right:0;background:var(--bg);flex-direction:column;padding:16px;border-bottom:1px solid var(--border);box-shadow:0 4px 12px rgba(0,0,0,.08)}
  .nav-menu.open{display:flex}
  .menu-toggle{display:block}
  .header-btn{display:none}
  .hero{padding:50px 16px 40px}
  .section{padding:50px 16px}
}