/* ===== 秀钰燚下载中心 · 前台样式 ===== */
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-light:#eff6ff;
  --primary-rgb:37,99,235;
  --text:#0f172a;
  --text-2:#475569;
  --text-3:#94a3b8;
  --border:#e8eef6;
  --bg:#f5f7fb;
  --card:#ffffff;
  --radius:16px;
  --shadow:0 6px 24px rgba(15,23,42,.06);
  --shadow-lg:0 14px 44px rgba(15,23,42,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;font-size:15px;
  min-height:100vh;display:flex;flex-direction:column;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}

/* ===== 头部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
.nav-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand img{width:38px;height:38px;border-radius:11px;object-fit:cover}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:.2px}
.brand-text span{font-size:11px;color:var(--text-3)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-links a{padding:8px 14px;border-radius:9px;font-size:14px;color:var(--text-2);font-weight:500;transition:.18s}
.nav-links a:hover,.nav-links a.active{background:var(--primary-light);color:var(--primary)}
.nav-search{margin-left:auto;flex:1;max-width:380px}
.search-box{display:flex;align-items:center;gap:8px;background:#f1f4f9;border:1px solid transparent;border-radius:11px;padding:0 12px;transition:.2s}
.search-box:focus-within{background:#fff;border-color:var(--primary);box-shadow:0 0 0 3px rgba(var(--primary-rgb),.12)}
.search-box svg{width:17px;height:17px;color:var(--text-3);flex-shrink:0}
.search-box input{flex:1;border:0;background:transparent;outline:none;padding:10px 0;font-size:14px;min-width:0}
.search-box button{border:0;background:var(--primary);color:#fff;border-radius:8px;padding:6px 13px;font-size:13px;cursor:pointer;flex-shrink:0}
.nav-toggle{display:none;border:1px solid var(--border);background:#fff;border-radius:10px;width:42px;height:42px;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}
.nav-toggle svg{width:20px;height:20px}

/* ===== 主体 ===== */
main{flex:1;padding:28px 0 56px}
.hero{
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  border-radius:var(--radius);padding:38px 34px;color:#fff;position:relative;overflow:hidden;
  box-shadow:0 18px 40px rgba(var(--primary-rgb),.28);margin-bottom:28px;
}
.hero::after{
  content:"";position:absolute;right:-60px;top:-70px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.10);
}
.hero::before{
  content:"";position:absolute;right:70px;bottom:-90px;width:180px;height:180px;border-radius:50%;
  background:rgba(255,255,255,.08);
}
.hero h1{font-size:27px;font-weight:700;margin-bottom:8px;position:relative;z-index:1}
.hero p{opacity:.92;font-size:14.5px;max-width:640px;position:relative;z-index:1}
.hero-stats{display:flex;gap:30px;margin-top:22px;flex-wrap:wrap;position:relative;z-index:1}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:22px;font-weight:700}
.hero-stats small{font-size:12px;opacity:.85}

.notice{
  display:flex;gap:12px;align-items:flex-start;background:#fffbeb;border:1px solid #fde68a;
  color:#92400e;border-radius:12px;padding:13px 16px;font-size:14px;margin-bottom:24px;
}
.notice svg{width:18px;height:18px;flex-shrink:0;margin-top:2px}

.section{margin-bottom:34px}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px;flex-wrap:wrap}
.section-head h2{font-size:18px;font-weight:700;display:flex;align-items:center;gap:9px}
.section-head h2::before{content:"";width:4px;height:18px;border-radius:3px;background:var(--primary)}
.section-head .more{font-size:13px;color:var(--text-3)}
.section-head .more:hover{color:var(--primary)}

/* 面包屑 */
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:13.5px;color:var(--text-3);margin-bottom:18px}
.breadcrumb a{color:var(--text-2);padding:3px 8px;border-radius:7px;transition:.18s}
.breadcrumb a:hover{background:var(--primary-light);color:var(--primary)}
.breadcrumb .sep{color:#cbd5e1}
.breadcrumb .current{color:var(--text);font-weight:600;padding:3px 8px}

/* 文件夹卡片 */
.folder-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.folder-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;
  display:flex;gap:14px;align-items:flex-start;transition:.22s;position:relative;
}
.folder-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(var(--primary-rgb),.35)}
.folder-icon{
  width:46px;height:46px;border-radius:12px;flex-shrink:0;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
}
.folder-icon svg{width:24px;height:24px}
.folder-info{min-width:0;flex:1}
.folder-info h3{font-size:15.5px;font-weight:600;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.folder-info p{font-size:12.5px;color:var(--text-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.4em}
.folder-badge{
  position:absolute;top:14px;right:14px;background:var(--primary-light);color:var(--primary);
  font-size:11.5px;font-weight:600;border-radius:20px;padding:2px 9px;
}

/* 文件网格 */
.file-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.file-list{display:flex;flex-direction:column;gap:12px}
.file-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;
  display:flex;flex-direction:column;gap:12px;transition:.22s;
}
.file-card:hover{box-shadow:var(--shadow-lg);border-color:rgba(var(--primary-rgb),.3);transform:translateY(-2px)}
.file-main{display:flex;gap:14px;align-items:center;min-width:0}
.file-type{
  width:50px;height:50px;border-radius:12px;flex-shrink:0;display:flex;
  flex-direction:column;align-items:center;justify-content:center;gap:1px;
  font-size:10px;font-weight:700;letter-spacing:.3px;text-transform:uppercase;
}
.file-type svg{width:22px;height:22px}
.file-body{flex:1;min-width:0}
.file-body h3{font-size:15px;font-weight:600;margin-bottom:5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--text-3)}
.file-meta span{display:inline-flex;align-items:center;gap:4px}
.file-meta svg{width:13px;height:13px}
.file-actions{display:flex;align-items:center;gap:10px;padding-top:12px;border-top:1px solid var(--border)}
.file-actions .btn{flex:1}
.file-desc{font-size:12.5px;color:var(--text-2);margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tag{background:#f1f5f9;color:var(--text-2);border-radius:6px;padding:1px 7px;font-size:11.5px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 18px;border-radius:10px;border:0;font-size:13.5px;font-weight:600;
  cursor:pointer;transition:.2s;white-space:nowrap;
}
.btn svg{width:15px;height:15px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(var(--primary-rgb),.3)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-ghost{background:#f1f5f9;color:var(--text-2)}
.btn-ghost:hover{background:#e2e8f0}
.btn-sm{padding:7px 13px;font-size:12.5px}

.empty{
  background:var(--card);border:1px dashed var(--border);border-radius:14px;
  padding:60px 24px;text-align:center;color:var(--text-3);
}
.empty svg{width:48px;height:48px;margin:0 auto 14px;color:#cbd5e1}
.empty h3{font-size:16px;color:var(--text-2);margin-bottom:6px;font-weight:600}
.empty p{font-size:13px}

/* 分页 */
.pagination{display:flex;justify-content:center;align-items:center;gap:7px;margin-top:30px;flex-wrap:wrap}
.page-item{
  min-width:38px;height:38px;padding:0 12px;border-radius:10px;background:#fff;border:1px solid var(--border);
  display:inline-flex;align-items:center;justify-content:center;font-size:13.5px;color:var(--text-2);transition:.2s;
}
.page-item:hover{border-color:var(--primary);color:var(--primary)}
.page-item.active{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}
.page-item.disabled{opacity:.5;cursor:not-allowed}

/* 页脚 */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:30px 0;margin-top:auto}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}
.footer-inner a:hover{color:var(--primary)}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .nav-search{max-width:260px}
  .hero{padding:32px 26px}
  .hero h1{font-size:23px}
}
@media (max-width:820px){
  .nav-inner{height:auto;padding:12px 0;flex-wrap:wrap;gap:12px}
  .brand-text span{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .nav-search{order:3;flex-basis:100%;max-width:100%;margin-left:0}
  .nav-links{
    order:4;flex-basis:100%;flex-direction:column;align-items:stretch;gap:2px;
    max-height:0;overflow:hidden;transition:max-height .28s ease;margin-left:0;
  }
  .nav-links.open{max-height:420px}
  .nav-links a{padding:11px 14px}
  .folder-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
  .file-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  body{font-size:14.5px}
  .container{padding:0 14px}
  main{padding:18px 0 40px}
  .hero{padding:26px 20px;border-radius:14px}
  .hero h1{font-size:20px}
  .hero-stats{gap:20px}
  .hero-stats b{font-size:19px}
  .folder-grid{grid-template-columns:1fr}
  .breadcrumb{font-size:12.5px}
  .file-type{width:44px;height:44px}
  .btn{padding:9px 15px}
  .search-box button{padding:6px 11px}
  .footer-inner{flex-direction:column;text-align:center;gap:10px}
}