:root{
  --bg:#f6f7fb; --card:#ffffff; --ink:#1f2330; --sub:#6b7280; --line:#e9ecf3;
  --primary:#6d5ef0; --primary-d:#5848d6; --accent:#2bb3ff; --ok:#1fb96b; --warn:#f5a623; --err:#ef4444;
  --radius:16px; --shadow:0 6px 24px rgba(31,35,48,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
.hidden{display:none!important}
.btn{cursor:pointer;border:none;border-radius:999px;padding:10px 20px;font-size:14px;font-weight:600;transition:.18s;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 6px 16px rgba(109,94,240,.35)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-block{width:100%;padding:13px}
.btn-sm{padding:7px 14px;font-size:13px}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1160px;margin:0 auto;display:flex;align-items:center;gap:20px;padding:12px 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.brand-logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-weight:800}
.nav-links{display:flex;gap:22px;margin-left:20px;font-size:15px;color:var(--sub)}
.nav-links a:hover{color:var(--primary)}
.nav-actions{margin-left:auto;display:flex;gap:10px}

/* Hero */
.hero{position:relative;overflow:hidden;padding:70px 20px 50px}
.hero-bg{position:absolute;inset:0;background:radial-gradient(1200px 500px at 70% -10%,rgba(43,179,255,.18),transparent),radial-gradient(900px 500px at 10% 10%,rgba(109,94,240,.20),transparent);z-index:0}
.hero-inner{position:relative;z-index:1;max-width:860px;margin:0 auto;text-align:center}
.badge{display:inline-block;background:#fff;border:1px solid var(--line);color:var(--primary-d);font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:18px;box-shadow:var(--shadow)}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;letter-spacing:-.5px}
.hero h1 .hl{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:18px auto 28px;max-width:620px;color:var(--sub);font-size:17px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:42px}
.hero-stats b{display:block;font-size:30px;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:13px;color:var(--sub)}

/* 区块 */
.section{max-width:1160px;margin:0 auto;padding:64px 20px}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{text-align:center;font-size:30px;font-weight:800}
.section-sub{text-align:center;color:var(--sub);margin:10px 0 36px}

/* 功能网格 */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feature-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s;cursor:pointer}
.feature-card:hover{transform:translateY(-4px);border-color:var(--primary)}
.feature-ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:linear-gradient(135deg,rgba(109,94,240,.15),rgba(43,179,255,.15));margin-bottom:14px}
.feature-card h3{font-size:17px;margin-bottom:6px}
.feature-card p{font-size:13.5px;color:var(--sub)}

/* 套餐 */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.plan-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);position:relative;display:flex;flex-direction:column}
.plan-card.hl{border:2px solid var(--primary);box-shadow:0 12px 30px rgba(109,94,240,.18)}
.plan-tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:12px;padding:4px 14px;border-radius:999px}
.plan-name{font-size:20px;font-weight:800}
.plan-price{font-size:34px;font-weight:800;margin:10px 0 2px}
.plan-price small{font-size:14px;color:var(--sub);font-weight:500}
.plan-period{color:var(--sub);font-size:13px;margin-bottom:16px}
.plan-feats{list-style:none;flex:1}
.plan-feats li{padding:7px 0;font-size:14px;border-bottom:1px dashed var(--line);display:flex;gap:8px}
.plan-feats li:before{content:"✓";color:var(--ok);font-weight:800}
.plan-card .btn{margin-top:18px}

/* 状态面板 */
.status-panel{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.status-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.status-item .s-name{font-weight:700;display:flex;align-items:center;gap:10px}
.status-dot{width:10px;height:10px;border-radius:50%;background:var(--ok)}
.status-dot.off{background:var(--err)}
.status-item .s-meta{color:var(--sub);font-size:13px;margin-top:6px}
.status-loading{text-align:center;color:var(--sub)}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.step-num{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:12px}
.step h3{font-size:17px;margin-bottom:6px}
.step p{font-size:14px;color:var(--sub)}

/* 页脚 */
.footer{background:#fff;border-top:1px solid var(--line);padding:36px 20px}
.footer-inner{max-width:1160px;margin:0 auto;display:flex;flex-direction:column;gap:14px;align-items:center}
.footer-brand{display:flex;align-items:center;gap:8px;font-weight:800}
.footer-links{display:flex;gap:20px;color:var(--sub);font-size:14px}
.footer-links a:hover{color:var(--primary)}
.footer-copy{color:var(--sub);font-size:13px;text-align:center}

/* 控制台 */
.console{display:flex;min-height:100vh;background:var(--bg)}
.sidebar{width:240px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side-brand{padding:20px;font-weight:800;font-size:17px;border-bottom:1px solid var(--line)}
.side-nav{flex:1;padding:12px;overflow:auto}
.side-nav a{display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:10px;color:var(--sub);font-weight:600;cursor:pointer;margin-bottom:4px}
.side-nav a:hover{background:var(--bg);color:var(--ink)}
.side-nav a.active{background:linear-gradient(135deg,rgba(109,94,240,.12),rgba(43,179,255,.12));color:var(--primary-d)}
.side-foot{padding:14px;border-top:1px solid var(--line)}
.user-mini{font-size:13px;color:var(--sub);margin-bottom:8px;word-break:break-all}
.console-main{flex:1;padding:28px;max-width:1000px;width:100%}
.page-head{margin-bottom:20px}
.page-head h2{font-size:24px;font-weight:800}
.page-head p{color:var(--sub);font-size:14px}

/* 卡片/表单 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:18px}
.card h3{font-size:17px;margin-bottom:12px}
textarea,input[type=text],input[type=url],input[type=password],input[type=email]{width:100%;padding:13px 18px;border:1.5px solid transparent;border-radius:14px;font-size:14px;font-family:inherit;outline:none;transition:.18s;background:var(--bg);color:var(--ink)}
textarea:focus,input:focus{background:#fff;border-color:var(--primary);box-shadow:0 0 0 4px rgba(109,94,240,.12)}
input::placeholder,textarea::placeholder{color:#a8afc0}
textarea{resize:vertical;min-height:90px}
label{display:block;font-size:13px;color:var(--sub);margin:12px 0 6px;font-weight:600}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* 解析结果 */
.result-box{margin-top:16px}
.vid-card{display:flex;gap:14px;align-items:flex-start;background:var(--bg);border-radius:12px;padding:14px}
.vid-card video,.vid-card img{max-width:260px;border-radius:10px;background:#000}
.vid-meta{flex:1}
.vid-meta .cap{font-weight:600;margin-bottom:8px}
.tag{display:inline-block;background:rgba(109,94,240,.12);color:var(--primary-d);font-size:12px;padding:2px 10px;border-radius:999px;margin-right:6px}

/* 聊天气泡 */
.chat{display:flex;flex-direction:column;gap:12px;max-height:460px;overflow:auto;padding:6px}
.bubble{max-width:80%;padding:10px 14px;border-radius:14px;font-size:14px;white-space:pre-wrap;word-break:break-word}
.bubble.me{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;align-self:flex-end;border-bottom-right-radius:4px}
.bubble.ai{background:var(--bg);border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px}

/* 音乐列表 */
.song{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid var(--line);border-radius:12px;margin-bottom:10px}
.song .si{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-weight:800}
.song .smeta{flex:1}
.song .smeta b{font-size:14px}
.song .smeta span{display:block;font-size:12px;color:var(--sub)}

/* 日志/帖子 */
.log-item,.post-item{padding:12px 14px;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;font-size:13.5px}
.log-item .lt{color:var(--sub);font-size:12px}
.post-item .pa{font-size:12px;color:var(--sub);margin-top:6px}

/* 弹窗 */
.modal-mask{position:fixed;inset:0;background:rgba(20,22,30,.5);display:grid;place-items:center;z-index:100;backdrop-filter:blur(4px)}
.modal{background:#fff;width:420px;max-width:92vw;border-radius:18px;padding:28px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal-close{position:absolute;top:14px;right:18px;border:none;background:none;font-size:26px;cursor:pointer;color:var(--sub)}
.auth-tabs{display:flex;gap:8px;margin-bottom:18px}
.auth-tab{flex:1;padding:10px;border:none;background:var(--bg);border-radius:10px;font-weight:700;cursor:pointer;color:var(--sub)}
.auth-tab.active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
.auth-form label{margin-top:14px}
.auth-msg{font-size:13px;min-height:18px;margin:8px 0}
.auth-msg.err{color:var(--err)}
.auth-msg.ok{color:var(--ok)}
.auth-foot{text-align:center;margin-top:14px;font-size:13px;color:var(--sub)}
.auth-foot a{color:var(--primary);cursor:pointer}

/* Toast */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 22px;border-radius:999px;font-size:14px;z-index:200;box-shadow:0 10px 30px rgba(0,0,0,.3)}

@media(max-width:880px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .plan-grid,.status-panel,.steps{grid-template-columns:1fr}
  .nav-links{display:none}
  .hero h1{font-size:34px}
  .sidebar{position:fixed;z-index:60;width:200px;transform:translateX(-100%);transition:.2s}
  .sidebar.open{transform:none}
}