/* ===== 全局重置 ===== */
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;background:#f5f6fa;color:#1e293b;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
input,button,textarea,select{font-family:inherit;outline:none}
a{text-decoration:none;color:#6366f1}
#app{min-height:100vh;width:100%;margin:0 auto;background:#f5f6fa;position:relative}
.page{padding:0;min-height:100vh}

/* ===== Toast ===== */
.app-toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:99999;padding:10px 20px;border-radius:10px;font-size:14px;font-weight:500;box-shadow:0 4px 12px rgba(0,0,0,.1);max-width:85%;text-align:center;animation:toastIn .3s ease;background:#1e293b;color:#fff}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(-10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
.loading-text{text-align:center;padding:60px 20px;color:#94a3b8;font-size:15px}
.empty-state{text-align:center;padding:60px 20px;color:#94a3b8;font-size:16px}

/* ===== Button ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:10px;font-size:15px;font-weight:600;border:none;cursor:pointer;transition:all .2s}
.btn-block{width:100%}
.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}
.btn-primary:active{opacity:.85}
.btn-outline{background:#f1f5f9;color:#475569;border:1px solid #e2e8f0}
.btn-outline:active{background:#e2e8f0}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}

/* ===== 登录/注册页 ===== */
.page-login{padding:0;background:linear-gradient(180deg,#667eea 0%,#764ba2 50%,#f5f6fa 50%);min-height:100vh}
.login-header{padding:60px 20px 40px;text-align:center;color:#fff}
.login-logo{font-size:48px;margin-bottom:12px;filter:drop-shadow(0 4px 8px rgba(0,0,0,.2))}
.login-header h1{font-size:24px;font-weight:700;margin-bottom:4px;text-shadow:0 2px 4px rgba(0,0,0,.2)}
.login-header p{font-size:14px;opacity:.85}
.login-form{background:#fff;border-radius:20px 20px 0 0;padding:30px 24px;margin-top:0;min-height:400px}
.input-group{display:flex;align-items:center;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px;padding:0 14px;margin-bottom:14px;height:48px;transition:all .2s}
.input-group:focus-within{border-color:#667eea;background:#fff;box-shadow:0 0 0 3px rgba(102,126,234,.1)}
.input-icon{font-size:18px;margin-right:10px;flex-shrink:0}
.input-field{border:none;background:transparent;font-size:15px;width:100%;height:100%}
.input-field::placeholder{color:#94a3b8}
.login-links{text-align:center;margin-top:20px;font-size:14px;color:#64748b}
.login-links a{color:#667eea;font-weight:500}

/* =============================================
   手机端样式（<768px）
   ============================================= */
/* 侧栏 - 从左侧滑入 */
.sidebar-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:999;display:none}
.sidebar-overlay.show{display:block}
.sidebar-panel{position:fixed;top:0;left:0;width:260px;height:100vh;z-index:1000;background:linear-gradient(180deg,#0f172a 0%,#1e293b 100%);display:flex;flex-direction:column;transform:translateX(-100%);transition:transform .3s cubic-bezier(.4,0,.2,1);overflow:hidden}
.sidebar-panel.open{transform:translateX(0)}
.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid rgba(148,163,184,.15)}
.sidebar-title{color:#f8fafc;font-size:15px;font-weight:700}
.sidebar-close{color:#94a3b8;font-size:20px;cursor:pointer;padding:4px;line-height:1}
.cat-list{flex:1;overflow-y:auto;padding:8px 0}
.cat-list::-webkit-scrollbar{width:3px}
.cat-list::-webkit-scrollbar-thumb{background:#475569;border-radius:4px}
.cat-item{display:flex;align-items:center;gap:10px;padding:11px 18px;margin:2px 8px;border-radius:10px;color:#cbd5e1;cursor:pointer;transition:all .2s;font-size:14px;font-weight:500}
.cat-item:hover{background:rgba(99,102,241,.12);color:#f8fafc}
.cat-item.active{background:linear-gradient(135deg,rgba(99,102,241,.2),rgba(139,92,246,.2));color:#f8fafc;font-weight:600;border:1px solid rgba(99,102,241,.3)}
.cat-icon{width:18px;height:18px;object-fit:contain;text-align:center;flex-shrink:0;font-size:16px}
.cat-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sidebar-footer{padding:10px 12px;border-top:1px solid rgba(148,163,184,.15)}
.user-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;color:#94a3b8;font-size:13px;cursor:pointer;transition:all .2s}
.user-item:hover{color:#f8fafc;background:rgba(99,102,241,.1)}

/* 顶部导航 */
.top-bar{display:flex;align-items:center;padding:12px 16px;background:#fff;border-bottom:1px solid #f1f5f9;position:sticky;top:0;z-index:100;gap:10px}
.menu-btn{font-size:22px;background:none;border:none;cursor:pointer;padding:4px 6px;color:#1e293b;line-height:1;display:flex;align-items:center}
.top-title{font-size:16px;font-weight:700;color:#1e293b;flex:1}
.top-right{flex-shrink:0}
.user-badge{display:inline-flex;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;align-items:center;justify-content:center;font-size:13px;font-weight:700;cursor:pointer}

/* 资源列表 */
.resource-list{padding:16px}
.res-grid{display:grid;grid-template-columns:1fr;gap:14px}
.res-card{background:#fff;border-radius:14px;overflow:hidden;cursor:pointer;transition:all .25s;box-shadow:0 1px 3px rgba(0,0,0,.04);border:1px solid #f1f5f9}
.res-card:active{transform:scale(.97)}
.res-cover{height:160px;position:relative;display:flex;align-items:flex-start;justify-content:space-between;padding:10px;background-size:cover;background-position:center}
.res-type{background:rgba(0,0,0,.5);color:#fff;padding:3px 10px;border-radius:6px;font-size:11px;font-weight:600;backdrop-filter:blur(4px)}
.badge-vip,.badge-free{padding:3px 10px;border-radius:6px;font-size:11px;font-weight:700;backdrop-filter:blur(4px)}
.badge-vip{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff}
.badge-free{background:rgba(16,185,129,.8);color:#fff}
.res-info{padding:12px 14px}
.res-name{font-size:15px;font-weight:600;color:#1e293b;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.res-meta{display:flex;justify-content:space-between;font-size:12px;color:#94a3b8}
.res-cat{background:#f1f5f9;padding:2px 8px;border-radius:4px;color:#64748b}
.res-views{color:#94a3b8}

/* 分页 */
.pagination-bar{display:flex;align-items:center;justify-content:center;gap:12px;padding:20px 0 10px}
.page-btn{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:8px 16px;font-size:13px;color:#475569;cursor:pointer;transition:all .2s}
.page-btn:hover{background:#f8fafc;border-color:#667eea;color:#667eea}
.page-info{font-size:14px;font-weight:600;color:#64748b}

/* =============================================
   PC端样式（≥768px） - 左固定侧栏 + 右内容
   ============================================= */
@media(min-width:768px){
/* 侧栏固定左侧220px，不随内容滚动 */
.sidebar-overlay{display:none!important}
.sidebar-panel{position:fixed;top:0;left:0;width:220px;height:100vh;transform:none!important;z-index:1000}
.sidebar-close{display:none}

/* 主内容区右移220px */
.resource-list,.top-bar{margin-left:220px}
.top-bar{padding:12px 24px}
.menu-btn{display:none!important}
.resource-list{padding:24px}

/* 资源网格 - 自动列数 */
.res-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
}

/* ===== 详情页 ===== */
.detail-header{display:flex;align-items:center;padding:12px 16px;background:#fff;border-bottom:1px solid #f1f5f9;position:sticky;top:0;z-index:100;gap:12px}
.detail-header .back-btn{font-size:14px;background:none;border:none;color:#667eea;cursor:pointer;font-weight:600;padding:4px 8px;border-radius:6px;transition:all .2s}
.detail-header .back-btn:hover{background:#f0f4ff}
.detail-title{font-size:16px;font-weight:700;color:#1e293b;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.detail-body{padding:16px;max-width:800px;margin:0 auto}
@media(min-width:768px){.detail-body{padding:24px 32px;margin-left:220px}}
.detail-cover{display:flex;gap:8px;overflow-x:auto;padding-bottom:12px;margin-bottom:12px}
.detail-img{height:200px;border-radius:10px;object-fit:cover;flex-shrink:0}
.detail-intro{font-size:14px;color:#475569;line-height:1.7;margin-bottom:16px;padding:12px 16px;background:#f8fafc;border-radius:10px;border-left:3px solid #667eea}
.detail-content{font-size:15px;line-height:1.8;color:#334155;padding:8px 0}
.detail-content img{max-width:100%;border-radius:8px;margin:8px 0}
.detail-content pre{background:#0d1117;color:#7ee787;padding:12px 16px;border-radius:8px;overflow:auto;font-size:13px;line-height:1.5;margin:12px 0;white-space:pre-wrap;word-break:break-all}
.detail-content code{font-family:monospace;font-size:13px}
.detail-content blockquote{border-left:4px solid #667eea;padding:8px 16px;margin:12px 0;background:#f8fafc;color:#475569}
.detail-download{margin:20px 0;text-align:center}
.vip-lock{text-align:center;padding:40px 20px;background:#fff;border-radius:14px;margin:16px 0;border:1px solid #f1f5f9}
.lock-icon{font-size:48px;margin-bottom:12px}
.lock-text{font-size:16px;color:#64748b;font-weight:500}
.detail-meta{display:flex;justify-content:center;gap:16px;padding:16px;color:#94a3b8;font-size:12px}

/* ===== 个人中心 ===== */
.profile-header{background:linear-gradient(135deg,#667eea,#764ba2);padding:40px 20px 30px;text-align:center;color:#fff;position:relative}
.back-btn{position:absolute;top:16px;left:16px;background:rgba(255,255,255,.2);border:none;color:#fff;font-size:16px;padding:6px 12px;border-radius:8px;cursor:pointer}
.avatar-lg{width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.25);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700;margin:0 auto 12px;border:3px solid rgba(255,255,255,.5)}
.profile-name{font-size:20px;font-weight:700;margin-bottom:4px}
.profile-phone{font-size:14px;opacity:.8}
.profile-info{background:#fff;margin:16px;border-radius:14px;padding:4px 0;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.info-item{display:flex;justify-content:space-between;padding:14px 16px;border-bottom:1px solid #f1f5f9}
.info-item:last-child{border-bottom:none}
.info-label{color:#64748b;font-size:14px}
.info-value{color:#1e293b;font-weight:500;font-size:14px}