:root{
  --primary-color:#1a73e8; --secondary-color:#34a853; --accent-color:#fbbc05;
  --dark-color:#202124; --light-color:#f8f9fa; --text-dark:#3c4043; --text-light:#5f6368;
  --border-color:#dadce0; --card-bg:#fff; --header-bg:#fff; --footer-bg:#f1f3f4;
  --shadow:0 1px 2px 0 rgba(60,64,67,.1),0 2px 6px 2px rgba(60,64,67,.15);
  --radius:8px; --transition:all .3s ease;
}
*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif}
body{background:var(--light-color);color:var(--text-dark);line-height:1.6}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
header{background:var(--header-bg);box-shadow:0 2px 10px rgba(0,0,0,.05);position:sticky;top:0;z-index:1000}
.header-content{display:flex;justify-content:space-between;align-items:center;padding:12px 0}
.logo{display:flex;align-items:center;gap:10px}
.logo-img{height:60px;width:auto;max-height:120px;max-width:280px;display:block;object-fit:contain}
.logo-text{font-size:22px;font-weight:700;color:var(--primary-color)}
.logo-text span{color:var(--accent-color)}
nav ul{display:flex;list-style:none;gap:24px}
nav a{color:var(--text-dark);font-weight:600;padding:8px 0;position:relative;transition:var(--transition)}
nav a:hover,nav a.active{color:var(--primary-color)}
nav a.active::after{content:'';position:absolute;bottom:0;left:0;width:100%;height:3px;background:var(--primary-color);border-radius:3px}
.user-actions{display:flex;gap:15px}
.btn{padding:10px 20px;border-radius:var(--radius);font-weight:600;cursor:pointer;border:none;font-size:14px;transition:var(--transition)}
.btn-primary{background:var(--primary-color);color:#fff}
.btn-primary:hover{background:#0d5bb5;transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--primary-color);border:2px solid var(--primary-color)}
.btn-outline:hover{background:var(--primary-color);color:#fff}

/* 横滚广告栏（替代搜索栏，与原搜索区同宽尺码） */
.ad-marquee{background:linear-gradient(135deg,#1a73e8 0%,#4285f4 100%);padding:36px 0;color:#fff}
.ad-marquee .container{display:flex;align-items:center;gap:18px}
.ad-marquee .ad-label{flex:0 0 auto;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);
  padding:6px 14px;border-radius:20px;font-weight:700;font-size:13px;letter-spacing:1px;white-space:nowrap}
.ad-track-wrap{flex:1;overflow:hidden;position:relative;mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent)}
.ad-track{display:flex;gap:22px;width:max-content;animation:scrollLeft 40s linear infinite}
.ad-track:hover{animation-play-state:paused}
.ad-item{flex:0 0 auto;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  padding:10px 20px;border-radius:var(--radius);display:flex;align-items:center;gap:10px;white-space:nowrap;
  color:#fff;font-weight:600;font-size:15px;transition:var(--transition);backdrop-filter:blur(2px)}
.ad-item:hover{background:rgba(255,255,255,.28);transform:translateY(-2px);color:#fff}
.ad-item i{color:var(--accent-color);font-size:16px}
@keyframes scrollLeft{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(max-width:768px){.ad-marquee{padding:20px 0}.ad-track{animation-duration:30s}}

/* 保留原搜索区样式供子页复用 */
.search-section{background:linear-gradient(135deg,#1a73e8 0%,#4285f4 100%);padding:60px 0;color:#fff;text-align:center}
.search-section h1{font-size:36px;margin-bottom:10px}
.search-section p{font-size:18px;margin-bottom:30px;opacity:.9}
.search-box{max-width:700px;margin:0 auto;display:flex;gap:10px}
.search-input{flex:1;padding:15px 20px;border:none;border-radius:var(--radius);font-size:16px;box-shadow:var(--shadow)}
.search-input:focus{outline:3px solid rgba(255,255,255,.3)}
.search-btn{padding:0 30px;font-size:16px;background:var(--accent-color);color:var(--dark-color);font-weight:700}
.search-btn:hover{background:#e0a800}

main{padding:40px 0}
.section-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:10px;border-bottom:2px solid var(--border-color)}
.section-title h2{font-size:24px;color:var(--dark-color)}
.section-title a{color:var(--primary-color);font-weight:600;display:flex;align-items:center;gap:5px}
.section-title a:hover{text-decoration:underline}

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;margin-bottom:50px}
.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition);height:100%}
.card:hover{transform:translateY(-5px);box-shadow:0 10px 20px rgba(0,0,0,.1)}
.card-header{padding:20px;background:var(--primary-color);color:#fff;display:flex;align-items:center;gap:10px}
.card-header i{font-size:20px}
.card-body{padding:20px}
.card-body h3{margin-bottom:15px;color:var(--dark-color)}
.card-body ul{list-style:none}
.card-body li{padding:8px 0;border-bottom:1px solid var(--border-color)}
.card-body li:last-child{border-bottom:none}
.card-body a{color:var(--text-dark);display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.card-body a:hover{color:var(--primary-color)}
.card-body a:hover .external-icon{opacity:1;transform:translateX(3px)}
.external-icon{opacity:.5;transition:var(--transition);font-size:12px}

.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:25px;margin-bottom:50px}
.news-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition)}
.news-card:hover{transform:translateY(-5px)}
.news-img{height:180px;background:#e8f0fe;display:flex;align-items:center;justify-content:center;color:var(--primary-color);font-size:50px}
.news-content{padding:20px}
.news-content h3{margin-bottom:10px;color:var(--dark-color)}
.news-content p{color:var(--text-light);margin-bottom:15px;line-height:1.5}
.news-meta{display:flex;justify-content:space-between;color:var(--text-light);font-size:14px}
.news-tag{display:inline-block;background:#e8f0fe;color:var(--primary-color);padding:2px 10px;border-radius:12px;font-size:12px;font-weight:600;margin-bottom:8px}

.tools-section{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px;margin-bottom:50px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.tool-item{display:flex;flex-direction:column;align-items:center;text-align:center;padding:20px;background:var(--light-color);border-radius:var(--radius);transition:var(--transition)}
.tool-item:hover{background:#e8f0fe}
.tool-icon{width:60px;height:60px;background:var(--primary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;margin-bottom:15px;color:#fff;font-size:24px}
.tool-item h4{margin-bottom:10px;color:var(--dark-color)}
.tool-item p{color:var(--text-light);font-size:14px;margin-bottom:15px}

/* 筛选 */
.filter-box{max-width:480px;margin:0 auto 25px;display:flex;gap:10px;align-items:center}
.filter-input{flex:1;padding:12px 16px;border:1px solid var(--border-color);border-radius:var(--radius);font-size:15px}
.filter-input:focus{outline:2px solid var(--primary-color);border-color:var(--primary-color)}

/* 估值 */
.valuate-box{max-width:760px;margin:0 auto 50px;background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px}
.valuate-box .form-row{display:flex;gap:10px;margin-bottom:20px}
.valuate-box .form-row input{flex:1;padding:14px 18px;border:1px solid var(--border-color);border-radius:var(--radius);font-size:16px}
.valuate-result{display:none;margin-top:10px}
.valuate-result.show{display:block}
.score-bar{height:14px;background:#e8f0fe;border-radius:7px;overflow:hidden;margin:10px 0}
.score-fill{height:100%;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));border-radius:7px;width:0;transition:width 1s ease}
.factor-list{font-size:14px;color:var(--text-light);line-height:1.9}
.factor-list b{color:var(--text-dark)}
.tag{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:700;margin-left:6px}
.tag-good{background:#e6f4ea;color:var(--secondary-color)}
.tag-mid{background:#fef7e0;color:#b06000}
.tag-bad{background:#fce8e6;color:#c5221f}

/* 简介 */
.about-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px;margin-bottom:30px}
.about-card h3{color:var(--dark-color);margin-bottom:15px;display:flex;align-items:center;gap:8px}
.about-card h3 i{color:var(--primary-color)}
.contact-item{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px dashed var(--border-color)}
.contact-item:last-child{border-bottom:none}
.contact-item i{width:32px;height:32px;background:#e8f0fe;color:var(--primary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px}

footer{background:var(--footer-bg);padding:50px 0 20px;border-top:1px solid var(--border-color)}
.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:40px;margin-bottom:30px}
.footer-section h3{font-size:18px;margin-bottom:20px;color:var(--dark-color)}
.footer-section ul{list-style:none}
.footer-section li{margin-bottom:10px}
.footer-section a{color:var(--text-light);transition:var(--transition)}
.footer-section a:hover{color:var(--primary-color);padding-left:5px}
.copyright{text-align:center;padding-top:20px;border-top:1px solid var(--border-color);color:var(--text-light);font-size:14px}

@media(max-width:768px){
  .header-content{flex-direction:column;gap:12px}
  nav ul{gap:14px;flex-wrap:wrap;justify-content:center}
  .search-section h1{font-size:28px}
  .search-box{flex-direction:column}
  .search-btn{width:100%}
  .news-grid,.card-grid{grid-template-columns:1fr}
  .valuate-box .form-row{flex-direction:column}
}