/* Luping.net 新视觉主题 — 现代渐变 + 玻璃风格 */
:root{
  --primary:#1E90FF;--primary-end:#3A7BD5;--purple-start:#6A5ACD;--purple-end:#9370DB;
  --bg:#F5F5F5;--white:#FFFFFF;--text:#333333;--muted:#666;
  --radius:10px;--radius-md:12px;--radius-sm:8px;--shadow:0 4px 12px rgba(0,0,0,0.1);
  --gradient:linear-gradient(135deg,var(--primary),var(--primary-end));
}
body.theme-purple{--primary:var(--purple-start);--primary-end:var(--purple-end);--gradient:linear-gradient(135deg,var(--purple-start),var(--purple-end));}

*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:"Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Noto Sans CJK SC","Helvetica Neue",Arial,"Hiragino Sans GB","Heiti SC",sans-serif;color:var(--text);background:linear-gradient(180deg,#fafcff, #eef3ff 40%, #f6f7fb);}

.bg-glow{position:fixed;inset:-20vmax;pointer-events:none;z-index:-1;background:radial-gradient(60vmax 60vmax at 10% 10%, rgba(30,144,255,.22), transparent 60%), radial-gradient(50vmax 50vmax at 80% 10%, rgba(58,123,213,.18), transparent 65%);} /* 柔光背景 */

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:16px;padding:12px 20px;background:rgba(255,255,255,.6);backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid rgba(255,255,255,.5);box-shadow:0 6px 20px rgba(62,87,152,.08);} 
.logo{display:flex;align-items:center;gap:8px;font-weight:700}
.logo-text{font-size:18px}
.logo-dot{font-size:12px;color:#6b7a99;padding:4px 8px;border-radius:999px;background:rgba(30,144,255,.1);}
.actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.nav{display:flex;gap:8px}
.nav-link{display:inline-flex;align-items:center;padding:8px 12px;border-radius:var(--radius-sm);color:#334;text-decoration:none;transition:.2s}
.nav-link:hover{background:rgba(255,255,255,.7);color:var(--primary)}
.lang-select{padding:8px 10px;border:1px solid #e6eaf5;border-radius:var(--radius-sm);background:#fff;color:#334}

/* 汉堡菜单（移动端） */
.nav-toggle{display:none}
.hamburger{display:none;width:40px;height:40px;align-items:center;justify-content:center;border-radius:8px;background:rgba(255,255,255,.7);box-shadow:var(--shadow);cursor:pointer}
.hamburger span{display:block;width:18px;height:2px;background:#445;margin:3px 0;border-radius:2px}

/* 主要按钮 */
.primary,.primary-btn,.start-btn,.download-btn{--pad-y:10px;--pad-x:16px;display:inline-flex;align-items:center;gap:8px;padding:var(--pad-y) var(--pad-x);border:none;border-radius:var(--radius-sm);background:var(--gradient);color:#fff;font-weight:600;box-shadow:0 8px 20px rgba(30,144,255,.28);text-decoration:none;transition:transform .12s ease, filter .12s ease, box-shadow .2s}
.primary:hover,.primary-btn:hover,.start-btn:hover,.download-btn:hover{filter:brightness(1.1)}
.primary:active,.primary-btn:active,.start-btn:active,.download-btn:active{transform:scale(.95)}

/* 辅助按钮 */
.ghost-btn,.feature-btn,.pause-btn,.stop-btn,.resume-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:var(--radius-sm);background:transparent;border:1.5px solid var(--primary);color:var(--primary);font-weight:600;text-decoration:none;transition:.15s}
.ghost-btn:hover,.feature-btn:hover,.pause-btn:hover,.stop-btn:hover,.resume-btn:hover{box-shadow:0 2px 8px rgba(30,144,255,.18);filter:brightness(1.05)}
.stop-btn{border-color:#DC3545;color:#DC3545}
.stop-btn:hover{box-shadow:0 2px 10px rgba(220,53,69,.24)}

/* 页面主体 */
.container{max-width:1200px;margin:24px auto;padding:0 20px;animation:fadeIn .5s ease-out both}
.hero{padding:8px 0 18px}
.hero h1{font-size:36px;margin:0 0 6px;font-weight:800;background:linear-gradient(135deg,#2f6bff,var(--primary-end));-webkit-background-clip:text;background-clip:text;color:transparent}
.subtitle{color:#4b5563;margin:0}

.card{margin-top:18px;border-radius:var(--radius-md);background:rgba(255,255,255,.7);backdrop-filter:blur(8px);box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.6);padding:16px}

.button-group{margin:16px 0}
.button-group h3{margin:0 0 12px;font-size:16px;color:#374151}
.button-row{display:flex;flex-wrap:wrap;gap:12px}

.settings-row{display:grid;grid-template-columns:repeat(3,minmax(240px,1fr));gap:12px}
.setting-item{display:flex;flex-direction:column;gap:6px;padding:12px;border-radius:var(--radius-sm);background:#fff;box-shadow:var(--shadow);border:1px solid #eef2f7}
.setting-label{display:flex;align-items:center;gap:8px;color:#374151;font-weight:700}
.setting-select,.setting-input{padding:10px 12px;border:1px solid #e6eaf5;border-radius:var(--radius-sm);background:#fff;color:#334}
.setting-input::placeholder{color:#889}

/* 控制区与状态 */
.controls-section{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:8px;padding:12px;border-radius:var(--radius-sm);background:#fff;border:1px solid #eef2f7;box-shadow:var(--shadow)}
.main-controls{display:flex;flex-wrap:wrap;gap:10px}
.status-info{display:flex;align-items:center;gap:10px;color:#4b5563}
#status{display:inline-flex;align-items:center;gap:8px}
#status::before{content:"";width:8px;height:8px;border-radius:50%;background:#9aa;display:inline-block}
#status.recording::before{background:#DC3545;animation:pulse 1s infinite}
#timer{font-weight:700;color:var(--primary)}

/* 预览区域 */
.preview{display:grid;grid-template-columns:repeat(2,minmax(280px,1fr));gap:16px;margin-top:12px}
.preview h3{margin:0 0 8px}
.video-wrap{position:relative;border:2px solid rgba(30,144,255,.35);border-radius:var(--radius-md);overflow:hidden;background:#000}
video{display:block;width:100%;height:auto;background:#000}
.preview-toolbar{position:absolute;left:12px;bottom:12px;display:flex;gap:8px;padding:8px;border-radius:var(--radius-sm);background:rgba(10,13,20,.5);backdrop-filter:blur(6px);opacity:0;transform:translateY(6px);transition:.2s}
.video-wrap:hover .preview-toolbar{opacity:1;transform:translateY(0)}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;border:1px solid rgba(255,255,255,.5);color:#fff;background:rgba(255,255,255,.1);cursor:pointer;transition:.15s}
.icon-btn:hover{border-color:#fff;background:rgba(255,255,255,.18)}

.download{display:flex;align-items:center;gap:10px;margin-top:10px}
#downloadLink{display:inline-flex}
#sizeInfo{color:#6b7280}

/* 操作教程 */
.tutorial{margin-top:16px;padding:16px;border-radius:var(--radius-md);background:#fff;border:1px solid #eef2f7;box-shadow:var(--shadow)}
.steps{margin:0 0 8px 18px;color:#4b5563}

/* 弹窗 */
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;background:rgba(10,13,20,.3);backdrop-filter:blur(2px)}
.modal[hidden]{display:none}
.modal-content{width:min(680px,90vw);border-radius:12px;background:#fff;box-shadow:0 10px 28px rgba(0,0,0,.18);border:1px solid #eef2f7;padding:20px;animation:fadeIn .2s ease}
.modal-content h3{margin-top:0}
.modal .ghost{padding:10px 16px}

/* 底部 */
.footer{margin-top:24px;padding:16px;text-align:center;color:#4b5563;background:#f5f7fb;border-top:1px solid #e8edf7}
.footer a{color:#3a67d5;text-decoration:none}
.footer a:hover{color:#1E90FF}
.footer-divider{color:#aab}

/* 成功/错误提示 */
.alert{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:6px;box-shadow:var(--shadow);animation:fadeIn .2s ease}
.alert.success{background:#e9f7ee;color:#28A745}
.alert.error{background:#fdeaea;color:#DC3545}

/* 动效 */
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:.3;transform:scale(1)}50%{opacity:1;transform:scale(1.35)}}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--primary),var(--primary-end));border-radius:999px}
::-webkit-scrollbar-track{background:#eef2f7}

/* 响应式 */
@media(max-width:1024px){.settings-row{grid-template-columns:repeat(2,minmax(240px,1fr))}}
@media(max-width:768px){
  .nav{display:none}
  .hamburger{display:flex}
  .actions{position:fixed;right:16px;top:64px;flex-direction:column;align-items:stretch;gap:10px;padding:12px;border-radius:12px;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);box-shadow:var(--shadow);display:none}
  .nav-toggle:checked ~ .actions{display:flex}
  .container{margin-top:10px}
  .settings-row{grid-template-columns:1fr}
  .preview{grid-template-columns:1fr;}
  .hero h1{font-size:28px}
}

/* 增强：feature 切换激活/未激活态 */
.feature-btn[data-active="true"]{background:var(--gradient);color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(30,144,255,.28)}
.feature-btn[data-active="true"] .btn-title{color:#fff}
.feature-btn[data-active="true"] .btn-desc{color:rgba(255,255,255,.85)}
.feature-btn[data-active="true"] .btn-icon{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.6);color:#fff}

.feature-btn[data-active="false"]{border-color:#d1d5db;color:#6b7280;background:rgba(255,255,255,.78);box-shadow:var(--shadow)}
.feature-btn[data-active="false"] .btn-title{color:#374151}
.feature-btn[data-active="false"] .btn-desc{color:#6b7280}
.feature-btn[data-active="false"] .btn-icon{background:rgba(255,255,255,.92);color:#6b7280;border-color:#e5e7eb}

.feature-btn:active{transform:scale(.95)}

/* note 提示条优化 */
.note{margin-top:12px;color:#4b5563;font-size:14px;padding:10px 12px;border-radius:var(--radius-sm);border:1px solid #e6eaf5;background:rgba(255,255,255,.88);box-shadow:var(--shadow);display:flex;align-items:center;gap:8px}
.note::before{content:"ℹ️";}