/* ============================================
   隆光集团官方网站 - 主样式表
   ============================================ */

/* ============ CSS 变量 ============ */
:root {
  --accent:       #c9a96e;
  --accent-dark:  #b8933f;
  --primary:      #1a1a2e;
  --primary-light:#252540;

  --text-dark:    #1a1a2e;
  --text-primary: #333;
  --text-secondary: #666;
  --text-muted:   #999;

  --bg-light:     #f5f6f8;
  --bg-card:      #fff;
  --bg-white:     #fff;

  --border-color: #e8e8e8;
  --border-light: #eee;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --transition-base: 0.3s ease;
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
}

/* ============ Reset ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* ============ Site Header ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:14px 0;background:transparent;transition:all var(--transition-base)}
.site-header.scrolled{background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);box-shadow:var(--shadow-sm);padding:8px 0}
.header-inner{max-width:1240px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700;color:#fff;z-index:1001}
.site-header.scrolled .logo{color:var(--primary)}
.logo-icon{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--accent);color:#fff;border-radius:6px;font-size:1.3rem;font-weight:700;flex-shrink:0}

.main-nav{display:flex;align-items:center;gap:4px}
.main-nav>li{position:relative}
.main-nav>li>a{display:block;padding:10px 16px;font-size:0.9rem;color:rgba(255,255,255,0.85);transition:all 0.3s;white-space:nowrap;border-radius:4px}
.site-header.scrolled .main-nav>li>a{color:var(--text-primary)}
.main-nav>li>a:hover,.main-nav>li.active>a{color:var(--accent)}
.main-nav>li>a .arrow{font-size:0.65rem;margin-left:4px;vertical-align:middle}

/* Dropdown */
.main-nav .dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%);background:#fff;min-width:160px;border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:all 0.3s;z-index:100;padding:8px 0}
.main-nav>li:hover>.dropdown{opacity:1;visibility:visible}
.main-nav .dropdown li a{display:block;padding:10px 20px;font-size:0.85rem;color:var(--text-primary);transition:all 0.2s}
.main-nav .dropdown li a:hover{color:var(--accent);background:#f9f9f9}

/* Mobile Menu Toggle */
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;z-index:1001;padding:4px}
.menu-toggle span{display:block;width:24px;height:2px;background:#fff;transition:all 0.3s}
.site-header.scrolled .menu-toggle span{background:var(--primary)}

/* ============ Sections ============ */
.section{padding:80px 0}
.section-inner{max-width:1240px;margin:0 auto;padding:0 24px}
.section-gray{background:var(--bg-light)}
.section-dark{background:var(--primary);color:#fff}

/* Section Title */
.section-title{text-align:center;margin-bottom:48px}
.section-title .subtitle{font-size:0.82rem;color:var(--accent);text-transform:uppercase;letter-spacing:3px;margin-bottom:6px;font-weight:600}
.section-title h2{font-size:2rem;margin-bottom:12px;color:var(--text-dark)}
.section-title .line{width:56px;height:2px;background:var(--accent);margin:0 auto 16px}
.section-title p{color:var(--text-secondary);max-width:640px;margin:0 auto;font-size:0.92rem}

/* ============ Buttons ============ */
.btn{display:inline-block;padding:10px 24px;border-radius:var(--radius-sm);font-size:0.92rem;font-weight:500;cursor:pointer;transition:all var(--transition-base);border:none;text-align:center;overflow:hidden;position:relative}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 4px 14px rgba(201,169,110,0.3)}
.btn-outline{background:transparent;border:1px solid var(--accent);color:var(--accent)}
.btn-outline:hover{background:var(--accent);color:#fff}
.btn-lg{padding:14px 32px;font-size:1rem}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:var(--accent);color:#fff}
.btn-outline-white{background:transparent;border:1px solid rgba(255,255,255,0.5);color:#fff}
.btn-outline-white:hover{background:#fff;color:var(--primary)}
.btn-full{width:100%}

/* ============ Stats Bar ============ */
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);max-width:1100px;margin:-50px auto 0;position:relative;z-index:10;background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-md);overflow:hidden}
.stat-card{text-align:center;padding:30px 20px;border-right:1px solid var(--border-light)}
.stat-card:last-child{border-right:none}
.stat-card .num{font-size:2rem;font-weight:700;color:var(--accent);margin-bottom:4px}
.stat-card .lbl{font-size:0.85rem;color:var(--text-muted)}

/* ============ Industry Cards ============ */
.industry-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.industry-card{display:block;text-align:center;padding:40px 28px;background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:all var(--transition-base);border:1px solid transparent}
.industry-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.industry-icon{font-size:2.8rem;margin-bottom:16px}
.industry-card h3{font-size:1.1rem;color:var(--text-dark);margin-bottom:10px}
.industry-card p{font-size:0.88rem;color:var(--text-muted);line-height:1.6}

/* ============ Project Cards ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{display:block;background:#fff;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);transition:all var(--transition-base)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card-img{width:100%;height:200px;object-fit:cover}
.card-body{padding:18px 20px 10px}
.card-body h3{font-size:1rem;color:var(--text-dark);margin-bottom:6px}
.card-body p{font-size:0.85rem;color:var(--text-muted);line-height:1.5}
.card-footer{padding:10px 20px 16px;display:flex;justify-content:space-between;align-items:center}
.card-tag{font-size:0.75rem;background:var(--bg-light);color:var(--text-secondary);padding:3px 10px;border-radius:12px}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.text-center{text-align:center}

/* ============ Hero Buttons ============ */
.hero-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:24px}

/* ============ News List ============ */
.news-list-item{display:flex;gap:20px;padding:18px 24px;border-bottom:1px solid var(--border-light);transition:background 0.2s}
.news-list-item:hover{background:#f9fafb}
.news-list-item.pinned{background:#fdf8f0}
.news-list-img{width:200px;min-height:120px;object-fit:cover;border-radius:var(--radius-sm);flex-shrink:0;background:#eee}
.news-list-content{flex:1;min-width:0}
.news-list-content h3{font-size:0.95rem;color:var(--text-dark);margin-bottom:6px}
.news-list-meta{font-size:0.8rem;color:var(--text-muted);margin-bottom:4px}
.news-list-content p{font-size:0.85rem;color:var(--text-secondary)}

/* ============ Pagination ============ */
.pagination{display:flex;justify-content:center;gap:6px;margin-top:32px}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;border:1px solid var(--border-color);border-radius:4px;font-size:0.85rem;color:var(--text-secondary);background:#fff;transition:all 0.2s}
.pagination a:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.pagination span.active{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ============ Contact Cards ============ */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.contact-card{text-align:center;padding:36px 20px;background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:all var(--transition-base)}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.contact-card .icon{font-size:2.2rem;margin-bottom:12px}
.contact-card h3{font-size:1rem;color:var(--text-dark);margin-bottom:8px}
.contact-card p{font-size:0.85rem;color:var(--text-muted)}

/* ============ Job Cards ============ */
.job-card{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:20px 24px;transition:all var(--transition-base)}
.job-card:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}
.job-card-header h3{font-size:1rem;color:var(--text-dark);cursor:pointer}
.job-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.job-tag{padding:3px 12px;background:var(--bg-light);border-radius:12px;font-size:0.78rem;color:var(--text-secondary)}

/* ============ Tabs ============ */
.tabs-nav{display:flex;gap:0;border-bottom:2px solid var(--border-light);margin-bottom:28px}
.tab-btn{padding:12px 24px;border:none;background:none;color:var(--text-secondary);font-size:0.92rem;cursor:pointer;text-decoration:none;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all 0.3s}
.tab-btn:hover,.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}

/* ============ Page Header ============ */
.page-header{background:linear-gradient(135deg,var(--primary),#252540);text-align:center;padding:70px 0 40px;margin-top:0}
.page-header h1{font-size:2rem;color:#fff;margin-bottom:8px}
.breadcrumb{font-size:0.85rem;color:rgba(255,255,255,0.6)}
.breadcrumb a{color:var(--accent);transition:color 0.2s}
.breadcrumb a:hover{color:#fff}

/* ============ Article Detail ============ */
.article-detail{max-width:820px;margin:0 auto}
.article-header{margin-bottom:30px}
.article-header h1{font-size:1.8rem;color:var(--text-dark);line-height:1.4}
.article-meta{margin-top:12px;font-size:0.85rem;color:var(--text-muted)}
.article-body{font-size:0.95rem;line-height:1.9;color:var(--text-primary)}
.article-body p{margin-bottom:16px}

/* ============ Forms ============ */
.form-group{margin-bottom:20px}
.form-group label{display:block;margin-bottom:6px;font-size:0.88rem;color:var(--text-secondary);font-weight:500}
.form-control{width:100%;padding:11px 14px;border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:0.92rem;font-family:inherit;color:var(--text-primary);background:#fff;transition:border-color 0.2s}
.form-control:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(201,169,110,0.1)}
.form-control::placeholder{color:#bbb}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.required{color:#e74c3c}

/* ============ Footer ============ */
.site-footer{background:var(--primary);color:#fff;padding:60px 0 0}
.footer-inner{max-width:1240px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.footer-col h4{color:var(--accent);margin-bottom:16px;font-size:1rem}
.footer-col p,.footer-col li{color:rgba(255,255,255,0.6);font-size:0.85rem;margin-bottom:6px;line-height:1.8}
.footer-col li a{color:rgba(255,255,255,0.6);transition:color 0.2s}
.footer-col li a:hover{color:var(--accent)}
.footer-oa-btn{display:inline-block;margin-top:12px;padding:7px 18px;border:1px solid rgba(255,255,255,0.2);border-radius:var(--radius-sm);color:var(--accent);font-size:0.82rem;transition:all 0.2s}
.footer-oa-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.footer-bottom{margin-top:40px;padding:20px 0;text-align:center;border-top:1px solid rgba(255,255,255,0.08)}
.footer-bottom p{color:rgba(255,255,255,0.4);font-size:0.8rem}

/* ============ Conversion Bar (右侧悬浮) ============ */
.conversion-bar{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:999;display:flex;flex-direction:column;gap:8px}
.conversion-btn{width:52px;height:52px;border-radius:50%;border:none;background:#fff;color:var(--text-secondary);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:0.65rem;box-shadow:var(--shadow-md);transition:all 0.3s}
.conversion-btn:hover{background:var(--accent);color:#fff;transform:scale(1.08)}
.conversion-btn .icon{font-size:1.1rem;margin-bottom:1px}

/* ============ Back to Top ============ */
.back-to-top{position:fixed;bottom:30px;right:30px;width:42px;height:42px;border-radius:50%;border:1px solid var(--accent);background:#fff;color:var(--accent);font-size:1.1rem;cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s;z-index:998}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{background:var(--accent);color:#fff}

/* ============ Modals ============ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:5000;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all 0.3s}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:#fff;border-radius:var(--radius-lg);padding:36px;width:90%;max-width:540px;max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-lg);position:relative}
.modal h2{font-size:1.3rem;color:var(--text-dark);margin-bottom:24px;text-align:center}
.modal-close{position:absolute;top:16px;right:16px;background:none;border:none;font-size:1.2rem;cursor:pointer;color:var(--text-muted);transition:color 0.2s}
.modal-close:hover{color:var(--text-dark)}

/* ============ Animations ============ */
.fade-in-up{opacity:0;transform:translateY(30px);transition:all 0.6s ease}
.fade-in-up.visible{opacity:1;transform:translateY(0)}
.stagger-item{opacity:0;transform:translateY(20px);transition:all 0.4s ease}
.stagger-item.visible{opacity:1;transform:translateY(0)}

/* ============ Error Pages ============ */
.error-page{text-align:center;padding:120px 20px 80px;min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center}
.error-page h1{font-size:5rem;color:var(--accent);line-height:1}
.error-page h2{font-size:1.4rem;color:var(--text-dark);margin:12px 0}
.error-page p{color:var(--text-muted);margin-bottom:28px;max-width:480px}

/* ============ Header Search ============ */
.header-search{display:flex;align-items:center;gap:4px}
.header-search input{padding:7px 12px;border:1px solid rgba(255,255,255,0.2);border-radius:4px;background:rgba(255,255,255,0.1);color:#fff;font-size:0.82rem;width:140px;outline:none;transition:all 0.3s}
.header-search input:focus{border-color:var(--accent);width:180px}
.header-search input::placeholder{color:rgba(255,255,255,0.4)}
.header-search button{background:none;border:none;cursor:pointer;font-size:1rem;padding:4px}

.site-header.scrolled .header-search input{background:var(--bg-light);color:var(--text-primary);border-color:var(--border-color)}
.site-header.scrolled .header-search input::placeholder{color:var(--text-muted)}

/* ============ Ripple ============ */
.ripple{position:absolute;border-radius:50%;background:rgba(201,169,110,0.3);transform:scale(0);animation:ripple 0.6s ease-out;pointer-events:none}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .stats-bar{grid-template-columns:repeat(2,1fr);margin-top:0}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
  .news-list-img{width:140px;min-height:90px}
}
@media(max-width:768px){
  html{font-size:15px}
  .section{padding:50px 0}
  .menu-toggle{display:flex}
  .main-nav{position:fixed;top:0;right:-280px;width:280px;height:100vh;background:#fff;flex-direction:column;align-items:stretch;padding:80px 20px 20px;transition:right 0.3s;overflow-y:auto;z-index:1000;box-shadow:var(--shadow-lg)}
  .main-nav.mobile-open{right:0}
  .main-nav>li>a{color:var(--text-primary);padding:12px 16px}
  .main-nav .dropdown{position:static;transform:none;box-shadow:none;opacity:1;visibility:visible;padding-left:16px;display:none}
  .main-nav>li.open>.dropdown{display:block}
  .grid-3,.grid-2,.grid-4,.industry-cards,.contact-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .news-list-item{flex-direction:column}
  .news-list-img{width:100%;height:160px}
  .header-search input{width:100px}
  .conversion-bar{right:6px;gap:4px}
  .conversion-btn{width:42px;height:42px;font-size:0.6rem}
}