/* ===== CSS Variables ===== */
:root {
  --primary: #1a56db;
  --primary-hover: #1e40af;
  --primary-light: #dbeafe;
  --primary-dark: #1e3a8a;
  --accent: #0ea5e9;
  --accent-light: #e0f2fe;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --bg-section: #f1f5f9;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 25px rgba(0,0,0,.1), 0 10px 10px rgba(0,0,0,.04);
  --font: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono: "SF Mono",Monaco,"Cascadia Code","Fira Code",monospace;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: .2s ease;
}

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--primary-hover)}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
h1{font-size:2.25rem}
h2{font-size:1.75rem}
h3{font-size:1.35rem}
h4{font-size:1.15rem}
p{margin-bottom:1rem}

/* ===== Layout ===== */
.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-sm{padding:48px 0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;margin-bottom:12px}
.section-title .subtitle{color:var(--text-secondary);font-size:1.05rem}
.bg-light{background:var(--bg-light)}
.bg-section{background:var(--bg-section)}
.row{display:flex;flex-wrap:wrap;gap:24px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:var(--bg);border-bottom:1px solid var(--border);height:var(--header-height)}
.site-header .header-inner{display:flex;align-items:center;justify-content:space-between;width:100%;height:100%;max-width:var(--max-width);margin:0 auto;padding:0 20px}
.site-header .site-logo{flex-shrink:0;display:flex;align-items:center;gap:10px}
.site-header .site-logo img{height:40px;width:auto}
.site-header .site-logo a{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}
.site-header .site-logo a:hover{color:var(--primary)}
.site-header .site-name{font-weight:700;font-size:1.05rem;color:var(--text)}

.nav-main{display:flex;align-items:center;gap:4px;height:100%}
.nav-main .nav-item{position:relative;display:flex;align-items:center;height:100%}
.nav-main .nav-item>a{display:flex;align-items:center;padding:0 16px;height:100%;font-size:.95rem;font-weight:500;color:var(--text);transition:all var(--transition);white-space:nowrap}
.nav-main .nav-item>a:hover,
.nav-main .nav-item>a.active{color:var(--primary)}
.nav-main .nav-arrow{font-size:.6rem;margin-left:4px}
.nav-main .nav-dropdown{position:absolute;top:100%;left:0;min-width:180px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all var(--transition);z-index:200}
.nav-main .nav-item:hover>.nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav-main .nav-dropdown a{display:block;padding:8px 20px;font-size:.9rem;color:var(--text-secondary);transition:all var(--transition)}
.nav-main .nav-dropdown a:hover,
.nav-main .nav-dropdown a.active{background:var(--bg-light);color:var(--primary)}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.header-actions .btn-search{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:transparent;cursor:pointer;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:1.1rem;transition:all var(--transition)}
.header-actions .btn-search:hover{background:var(--bg-light);color:var(--primary)}
.language-switcher{position:relative}
.language-switcher .btn-lang{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:transparent;cursor:pointer;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:1.1rem;transition:all var(--transition)}
.language-switcher .btn-lang:hover{background:var(--bg-light);color:var(--primary)}
.language-switcher .lang-dropdown{position:absolute;top:100%;right:0;min-width:140px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:4px 0;opacity:0;visibility:hidden;transition:all var(--transition);z-index:200}
.language-switcher:hover .lang-dropdown{opacity:1;visibility:visible}
.language-switcher .lang-dropdown a{display:block;padding:6px 16px;font-size:.85rem;color:var(--text-secondary)}
.language-switcher .lang-dropdown a:hover,
.language-switcher .lang-dropdown a.active{color:var(--primary);background:var(--bg-light)}

.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:1px;transition:all var(--transition)}

@media(max-width:768px){
  .menu-toggle{display:flex}
  .nav-main{display:none;position:absolute;top:var(--header-height);left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);flex-direction:column;padding:8px 0;box-shadow:var(--shadow-lg);height:auto!important}
  .nav-main.open{display:flex}
  .nav-main .nav-item{height:auto;padding:0}
  .nav-main .nav-item>a{padding:12px 20px;height:auto}
  .nav-main .nav-dropdown{position:static;opacity:1;visibility:visible;transform:none;border:none;box-shadow:none;padding:0 0 0 16px}
}

/* ===== Page Banner ===== */
.page-banner{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;padding:60px 0;text-align:center}
.page-banner h1{color:#fff;margin-bottom:8px}
.breadcrumb{font-size:.9rem;opacity:.9}
.breadcrumb a{color:rgba(255,255,255,.8)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{margin:0 8px;color:rgba(255,255,255,.5)}

/* ===== Cards ===== */
.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition)}
.card:hover{border-color:var(--primary-light);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.card-img{width:100%;aspect-ratio:16/10;object-fit:cover}
.card-body{padding:20px}
.card-title{font-size:1.05rem;margin-bottom:8px}
.card-title a{color:var(--text)}
.card-title a:hover{color:var(--primary)}
.card-desc{font-size:.9rem;color:var(--text-secondary);line-height:1.6;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;gap:16px;font-size:.8rem;color:var(--text-muted);flex-wrap:wrap}
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:992px){.list-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.list-grid{grid-template-columns:1fr}}

/* ===== Detail ===== */
.detail-header{margin-bottom:32px;text-align:center}
.detail-header h1{font-size:2rem;margin-bottom:16px}
.detail-meta{display:flex;justify-content:center;gap:20px;font-size:.9rem;color:var(--text-secondary);flex-wrap:wrap}
.detail-cover{margin-bottom:32px;border-radius:var(--radius-lg);overflow:hidden}
.detail-body{max-width:860px;margin:0 auto;padding:32px 0}
.rich-text{line-height:1.9;font-size:1.05rem}
.rich-text img{border-radius:var(--radius);margin:16px auto}
.rich-text p{margin-bottom:1.25rem}
.rich-text h2,.rich-text h3{margin:32px 0 16px}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;font-size:.95rem;font-weight:600;border-radius:var(--radius);border:1px solid transparent;cursor:pointer;transition:all var(--transition);line-height:1.5;text-decoration:none}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);color:#fff}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-lg{padding:14px 32px;font-size:1.05rem}
.btn-sm{padding:6px 16px;font-size:.85rem}
.btn-block{display:flex;width:100%}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ===== Badges ===== */
.badge{display:inline-block;padding:4px 10px;font-size:.75rem;font-weight:600;border-radius:50px;line-height:1.4}
.badge-primary{background:var(--primary-light);color:var(--primary)}
.badge-success{background:#d1fae5;color:#065f46}
.badge-warning{background:#fef3c7;color:#92400e}

/* ===== Forms ===== */
.form-input{width:100%;padding:10px 16px;font-size:.95rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);transition:border-color var(--transition);outline:none}
.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ===== Search ===== */
.search-form{display:flex;gap:12px;max-width:640px;margin:0 auto 32px}
.search-form .form-input{flex:1}
.search-empty{text-align:center;padding:64px 20px}
.search-empty h3{font-size:1.3rem;color:var(--text-secondary);margin-bottom:8px}
.search-empty p{color:var(--text-muted)}

/* ===== Footer ===== */
.site-footer{background:var(--text);color:rgba(255,255,255,.7);padding:60px 0 0}
.site-footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;margin-bottom:40px}
.site-footer h4{color:#fff;font-size:1rem;margin-bottom:16px}
.site-footer p,.site-footer a{font-size:.9rem;color:rgba(255,255,255,.6);line-height:2}
.site-footer a:hover{color:#fff}
.site-footer .footer-qr img{width:120px;height:120px;border-radius:var(--radius);background:#fff;padding:4px}
.site-footer .footer-qr p{margin-top:8px}
.site-footer .footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:.85rem;color:rgba(255,255,255,.4)}
@media(max-width:768px){.site-footer .footer-grid{grid-template-columns:1fr;gap:32px}}

/* ===== Pagination ===== */
.pagination{display:flex;justify-content:center;gap:4px;margin-top:48px}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;font-size:.9rem;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);transition:all var(--transition)}
.pagination a:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.pagination .active{background:var(--primary);border-color:var(--primary);color:#fff}
.pagination .disabled{opacity:.4;pointer-events:none}

/* ===== Utilities ===== */
.text-center{text-align:center}
.text-left{text-align:left}
.text-right{text-align:right}
.mt-8{margin-top:8px}
.mt-12{margin-top:12px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mt-48{margin-top:48px}
.mb-8{margin-bottom:8px}
.mb-12{margin-bottom:12px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mb-32{margin-bottom:32px}
.mb-48{margin-bottom:48px}
.ml-8{margin-left:8px}
.mr-8{margin-right:8px}
.d-none{display:none}
@media(min-width:769px){.d-md-none{display:none}}
@media(max-width:768px){.d-sm-none{display:none}}