/* ═══════════════════════════════════════════
   AI拓客引流系统 v3.0 — Premium Dark UI
   ═══════════════════════════════════════════ */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-surface: #16161f;
    --bg-elevated: #1c1c28;
    --bg-glass: rgba(22,22,31,0.85);
    --accent: #6366f1;
    --accent-glow: rgba(99,102,241,0.25);
    --accent-light: #818cf8;
    --gradient-primary: linear-gradient(135deg,#6366f1,#8b5cf6,#a855f7);
    --gradient-success: linear-gradient(135deg,#10b981,#059669);
    --text-primary: #f1f5f9;
    --text-secondary: #b0bec5;
    --text-muted: #8899a6;
    --border-subtle: rgba(255,255,255,0.06);
    --border-default: rgba(255,255,255,0.1);
    --border-strong: rgba(255,255,255,0.15);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.6);
    --radius-sm: 8px; --radius: 12px; --radius-lg: 16px; --radius-xl: 24px;
    --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}

.container{max-width:1344px;margin:0 auto;padding:0 32px;width:100%}

/* Header — Glass */
.header{background:var(--bg-glass);backdrop-filter:blur(20px)saturate(180%);-webkit-backdrop-filter:blur(20px)saturate(180%);border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:100}
.header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:20px;font-weight:800;color:var(--accent-light);letter-spacing:-0.5px}
.nav{display:flex;align-items:center;gap:2px}
.nav a{padding:8px 16px;border-radius:var(--radius-sm);text-decoration:none;color:var(--text-secondary);font-size:13.5px;font-weight:500;transition:all var(--transition)}
.nav a:hover{color:var(--text-primary);background:rgba(255,255,255,0.04)}
.nav a.active{color:white;background:rgba(99,102,241,0.15)}

/* Main */
.main{flex:1;padding:40px 0;min-height:calc(100vh - 130px)}

/* Hero */
.hero{background:radial-gradient(ellipse at 50% 0%,rgba(99,102,241,0.15) 0%,transparent 60%);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:80px 60px;text-align:center;margin-bottom:48px}
.hero h2{font-size:48px;font-weight:900;color:var(--text-primary);margin-bottom:16px;letter-spacing:-1px}
.hero .subtitle{font-size:18px;color:var(--text-secondary);margin-bottom:48px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{background:var(--bg-glass);backdrop-filter:blur(10px);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:all var(--transition)}
.stat-card:hover{transform:translateY(-2px);border-color:var(--border-default);box-shadow:0 0 20px var(--accent-glow)}
.stat-number{display:block;font-size:36px;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{font-size:12px;color:var(--text-muted);font-weight:500;text-transform:uppercase;letter-spacing:1px;margin-top:6px}

/* Cards */
.feature-card,.profile-card,.admin-section,.plan-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);transition:all var(--transition)}
.feature-card:hover,.plan-card:hover{border-color:var(--border-default);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.admin-section{padding:28px;margin-bottom:24px}
.admin-section h3,.profile-card h3{font-size:16px;font-weight:700;margin-bottom:16px}

/* KPI */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:32px}
.kpi-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:24px;transition:all var(--transition);position:relative;overflow:hidden}
.kpi-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px}
.kpi-card.primary::before{background:var(--gradient-primary)}
.kpi-card.success::before{background:var(--gradient-success)}
.kpi-card.info::before{background:linear-gradient(135deg,#3b82f6,#2563eb)}
.kpi-card.warning::before{background:linear-gradient(135deg,#f59e0b,#d97706)}
.kpi-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.kpi-value{font-size:32px;font-weight:800;letter-spacing:-0.5px}
.kpi-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.5px;margin-top:4px}
.kpi-sub{font-size:12px;color:var(--text-secondary);margin-top:4px}

/* Tables */
.data-table{width:100%;border-collapse:separate;border-spacing:0;background:var(--bg-surface);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-subtle);margin-bottom:24px}
.data-table th{background:var(--bg-elevated);padding:12px 16px;text-align:left;font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.5px;border-bottom:1px solid var(--border-subtle)}
.data-table td{padding:12px 16px;font-size:13.5px;border-bottom:1px solid var(--border-subtle)}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:rgba(255,255,255,0.02)}
.text-center{text-align:center;color:var(--text-muted)}

/* Badges */
.badge{display:inline-flex;padding:3px 10px;border-radius:6px;font-size:11px;font-weight:600}
.badge-success{background:rgba(16,185,129,0.12);color:#34d399}
.badge-warning{background:rgba(245,158,11,0.12);color:#fbbf24}
.badge-danger{background:rgba(239,68,68,0.12);color:#f87171}
.badge-info{background:rgba(99,102,241,0.12);color:#a5b4fc}
.status-badge{display:inline-flex;padding:2px 10px;border-radius:6px;font-size:11px;font-weight:600}
.status-published{background:rgba(16,185,129,0.12);color:#34d399}
.status-failed{background:rgba(239,68,68,0.12);color:#f87171}
.status-queued{background:rgba(245,158,11,0.12);color:#fbbf24}

/* Forms */
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text-secondary)}
.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-sm);font-size:14px;font-family:var(--font);color:var(--text-primary);transition:all var(--transition)}
.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.form-input::placeholder{color:var(--text-muted)}
.form-textarea{resize:vertical;min-height:100px}
.form-group small{display:block;margin-top:4px;font-size:12px;color:var(--text-muted)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:var(--radius-sm);font-size:13.5px;font-weight:600;border:none;cursor:pointer;transition:all var(--transition);font-family:var(--font);text-decoration:none;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,#f59e0b,#d97706);color:#1a1a1a;box-shadow:0 2px 8px rgba(245,158,11,0.3);font-weight:700}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(245,158,11,0.4)}
.btn-sm{padding:6px 12px;font-size:12px;border-radius:6px;background:var(--bg-elevated);color:var(--text-secondary);border:1px solid var(--border-subtle)}
.btn-sm:hover{color:var(--text-primary);border-color:var(--border-default)}
.btn-block{width:100%}

/* Feature Grid */
.features h3,.quick-start h3,.page-header h2{font-size:24px;font-weight:700;margin-bottom:20px}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:48px}
.feature-card{padding:28px}
.feature-card h4{font-size:15px;font-weight:700;margin-bottom:8px;color:var(--accent-light)}
.feature-card p{font-size:13px;color:var(--text-secondary)}

/* Page Header */
.page-header{margin-bottom:36px}
.page-header h2{font-size:28px;font-weight:800;letter-spacing:-0.5px}
.page-header p{color:var(--text-secondary);font-size:15px}

/* Auth */
.auth-page{display:flex;justify-content:center;align-items:center;min-height:60vh}
.auth-card{max-width:440px;width:100%;padding:48px 40px;box-shadow:var(--shadow-lg)}
.auth-card h2{font-size:28px;font-weight:800;text-align:center;margin-bottom:28px;color:var(--text-primary)}
.auth-form{display:flex;flex-direction:column;gap:16px}
.auth-link{text-align:center;margin-top:20px;font-size:14px;color:var(--text-secondary)}
.auth-link a{color:var(--accent-light);text-decoration:none;font-weight:600}
.auth-demo{text-align:center;margin-top:12px;font-size:12px;color:var(--text-secondary);background:var(--bg-elevated);padding:10px;border-radius:6px}
.alert{padding:12px 16px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:16px}
.alert-error{background:rgba(239,68,68,0.1);color:#f87171;border:1px solid rgba(239,68,68,0.15)}
.alert-success{background:rgba(16,185,129,0.1);color:#34d399;border:1px solid rgba(16,185,129,0.15)}

/* Plans */
.plans-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:48px}
.plan-card{padding:32px 24px;position:relative}
.plan-featured{border-color:var(--accent);box-shadow:0 0 30px rgba(99,102,241,0.1)}
.plan-current{border-color:#34d399}
.plan-badge{position:absolute;top:-12px;right:24px;background:var(--gradient-primary);color:white;padding:4px 16px;border-radius:8px;font-size:11px;font-weight:700}
.plan-card h3{font-size:20px;font-weight:700;margin-bottom:16px}
.price-amount{font-size:40px;font-weight:900;color:var(--accent-light)}
.price-period{font-size:14px;color:var(--text-muted)}
.plan-yearly{font-size:13px;color:#34d399;margin-bottom:20px}
.plan-features{list-style:none;margin-bottom:24px}
.plan-features li{padding:8px 0;font-size:13px;border-bottom:1px solid var(--border-subtle);color:var(--text-secondary)}
.plan-features li:last-child{border-bottom:none}
.plan-features li strong{color:var(--text-primary)}
.purchase-options{display:flex;flex-direction:column;gap:8px}
.current-plan-banner{background:rgba(16,185,129,0.08);border:1px solid rgba(16,185,129,0.15);border-radius:var(--radius-sm);padding:12px 20px;margin-top:16px;font-size:14px}

/* Info rows */
.info-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border-subtle);font-size:14px}
.info-row:last-child{border-bottom:none}
.info-row span{color:var(--text-muted)}

/* Footer */
.footer{background:var(--bg-surface);border-top:1px solid var(--border-subtle);padding:24px 0;text-align:center;font-size:13px;color:var(--text-muted)}

/* Quick Start */
.quick-start{margin-bottom:48px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:28px;text-align:center;transition:all var(--transition)}
.step:hover{transform:translateY(-2px);border-color:var(--border-default)}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--gradient-primary);color:white;border-radius:50%;font-size:16px;font-weight:700;margin-bottom:16px}
.step-content h4{font-size:15px;font-weight:600;margin-bottom:6px}
.step-content p{font-size:13px;color:var(--text-secondary)}

/* Upload */
.upload-area{background:var(--bg-surface);border:2px dashed var(--border-default);border-radius:var(--radius);padding:48px;text-align:center;margin-bottom:32px}
.upload-area:hover{border-color:var(--accent)}

/* Platform */
.platform-grid-select{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.platform-checkbox{display:flex;flex-direction:column;gap:4px;padding:12px;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);cursor:pointer;background:var(--bg-surface);transition:all var(--transition)}
.platform-checkbox:hover{border-color:var(--accent)}
.platform-checkbox input{display:none}
.platform-checkbox:has(input:checked){border-color:var(--accent);background:rgba(99,102,241,0.08)}
.platform-checkbox span{font-size:14px;font-weight:600}
.platform-checkbox small{font-size:11px;color:var(--text-muted)}
.form-row{display:flex;gap:16px;align-items:flex-end}

/* Schema */
.schema-types,.platform-grid,.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:32px}
.schema-card,.metric-card,.platform-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:20px}
.platform-card{text-align:center}
.citation-count{font-size:36px;font-weight:800;color:var(--accent-light)}

/* Chat specific */
.chat-container{display:flex;height:calc(100vh - 200px);min-height:500px;border:1px solid var(--border-subtle);border-radius:var(--radius);overflow:hidden;background:var(--bg-surface)}
.chat-sidebar{width:260px;border-right:1px solid var(--border-subtle);background:var(--bg-secondary);display:flex;flex-direction:column;flex-shrink:0}
.chat-sidebar h3{padding:16px;font-size:14px;border-bottom:1px solid var(--border-subtle);margin:0}
.model-list{flex:1;overflow-y:auto}
.model-item{padding:12px 16px;cursor:pointer;border-bottom:1px solid var(--border-subtle);transition:all var(--transition)}
.model-item:hover{background:var(--bg-surface)}
.model-item.active{background:var(--bg-surface);border-left:3px solid var(--accent)}
.model-name{font-size:14px;font-weight:600}
.model-provider{font-size:11px;color:var(--text-muted);margin-top:2px}
.chat-stats{padding:12px 16px;border-top:1px solid var(--border-subtle)}
.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}
.chat-header{padding:12px 20px;border-bottom:1px solid var(--border-subtle);display:flex;justify-content:space-between;align-items:center}
.chat-messages{flex:1;overflow-y:auto;padding:20px}
.chat-welcome{text-align:center;padding:40px 20px}
.chat-welcome h2{font-size:24px;margin-bottom:8px}
.chat-welcome p{color:var(--text-secondary);margin-bottom:24px}
.quick-prompts{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:500px;margin:0 auto}
.quick-prompt{padding:12px;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:var(--bg-surface);cursor:pointer;font-size:13px;text-align:left;font-family:var(--font);color:var(--text-secondary);transition:all var(--transition)}
.quick-prompt:hover{border-color:var(--accent);color:var(--text-primary);background:rgba(99,102,241,0.05)}
.chat-message{margin-bottom:16px;display:flex;gap:10px;align-items:flex-start}
.chat-message.user{flex-direction:row-reverse}
.chat-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;font-weight:600}
.chat-message.user .chat-avatar{background:var(--gradient-primary);color:white}
.chat-message.assistant .chat-avatar{background:var(--gradient-success);color:white}
.chat-bubble{padding:10px 16px;border-radius:12px;max-width:80%;font-size:14px;line-height:1.7;word-break:break-word}
.chat-message.user .chat-bubble{background:var(--gradient-primary);color:white;border-bottom-right-radius:4px}
.chat-message.assistant .chat-bubble{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-bottom-left-radius:4px}
.streaming-cursor{display:inline-block;width:8px;height:16px;background:var(--accent);margin-left:2px;animation:blink 1s infinite;vertical-align:text-bottom}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.chat-meta{font-size:11px;color:var(--text-muted);margin-top:6px}
.chat-input-area{padding:12px 20px;border-top:1px solid var(--border-subtle);display:flex;gap:10px}
.chat-input-area textarea{flex:1;padding:10px 14px;background:var(--bg-elevated);border:1px solid var(--border-default);border-radius:var(--radius-sm);font-size:14px;font-family:var(--font);color:var(--text-primary);resize:none;min-height:42px;max-height:120px}
.chat-input-area textarea:focus{outline:none;border-color:var(--accent)}
.chat-cost-hint{padding:0 20px 8px;font-size:11px;color:var(--text-muted);text-align:right;min-height:18px}
.loading-dots{display:inline-flex;gap:4px;padding:4px 0}
.loading-dots span{width:6px;height:6px;background:var(--text-muted);border-radius:50%;animation:bounce 1.4s infinite}
.loading-dots span:nth-child(2){animation-delay:0.2s}
.loading-dots span:nth-child(3){animation-delay:0.4s}
@keyframes bounce{0%,80%,100%{transform:translateY(0)}40%{transform:translateY(-8px)}}

/* Publish composer */
.publish-composer{margin-bottom:40px}
.publish-composer h3{font-size:18px;margin-bottom:16px}
.composer-form{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:28px}
.publish-result-item{padding:10px 14px;border-radius:6px;margin-bottom:6px;font-size:13px;display:flex;align-items:center;gap:8px}
.publish-result-item.success{background:rgba(16,185,129,0.1);color:#34d399}
.publish-result-item.failed{background:rgba(239,68,68,0.1);color:#f87171}

/* Generator */
.generator-form{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:28px;margin-bottom:32px}

/* Responsive */
@media(max-width:1200px){.hero-stats,.feature-grid,.steps,.kpi-grid,.plans-grid,.schema-types,.platform-grid-select{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{padding:0 16px}.hero{padding:40px 24px}.hero h2{font-size:28px}.hero-stats,.feature-grid,.steps,.kpi-grid,.plans-grid,.schema-types,.platform-grid-select{grid-template-columns:1fr}.header .container{flex-direction:column;height:auto;padding:12px 0;gap:8px}.nav{flex-wrap:wrap;justify-content:center}.chat-container{flex-direction:column}.chat-sidebar{width:100%}}