/* ============================================================
   芯鲸AI (ReganAI) - 交互设计样式
   清冷科技紫（方案B）色系
   ============================================================ */

/* === 设计变量 === */
:root {
    /* 主色调 - 清冷科技紫 */
    --primary: #8B5CF6;
    --primary-dark: #7C3AED;
    --primary-light: #A78BFA;
    --primary-bg: #F3F0FF;
    
    /* 渐变 - 科技紫系 */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 100%);
    --gradient-hero: linear-gradient(135deg, #F8F7FF 0%, #F3F0FF 50%, #EDE9FE 100%);
    --gradient-card: linear-gradient(135deg, #8B5CF6 0%, #A78BFA 100%);
    --gradient-cta: linear-gradient(135deg, #8B5CF6 0%, #9D73F8 50%, #A78BFA 100%);
    
    /* 中性色 - 与 aishuhai.com 一致 */
    --gray-50: #F8F7FF;
    --gray-100: #F0F2F7;
    --gray-200: #E4E7ED;
    --gray-300: #D0D5DD;
    --gray-400: #98A2B3;
    --gray-500: #667085;
    --gray-600: #475467;
    --gray-700: #3E526E;
    --gray-800: #1D2939;
    --gray-900: #111929;
    
    /* 功能色 */
    --success: #12B76A;
    --warning: #F79009;
    --danger: #F04438;
    --info: #8B5CF6;
    
    /* 尺寸 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* 阴影 - 更柔和 */
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
    --shadow-md: 0 4px 8px -2px rgba(16, 24, 40, 0.06), 0 2px 4px -2px rgba(16, 24, 40, 0.04);
    --shadow-lg: 0 12px 16px -4px rgba(16, 24, 40, 0.08), 0 4px 6px -2px rgba(16, 24, 40, 0.03);
    --shadow-xl: 0 20px 24px -4px rgba(16, 24, 40, 0.08), 0 8px 8px -4px rgba(16, 24, 40, 0.03);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.12);
    
    /* 字体 */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    
    /* 侧边栏 */
    --sidebar-width: 260px;
    --sidebar-collapsed: 64px;
    --header-height: 64px;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--gray-800);
    background: var(--gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1800px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
}

a { text-decoration: none; color: inherit; transition: all 0.2s; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* === 按钮系统 === */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s;
}
.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    color: var(--gray-500);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s;
}
.btn-ghost:hover { color: var(--primary); background: var(--primary-bg); }

.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* === 导航栏 === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: all 0.3s;
}
.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1800px;
    width: 100%;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-right: 48px;
}
.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}
.logo-sub {
    font-size: 12px;
    color: var(--gray-400);
    font-weight: 500;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}
.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--gray-600);
    border-radius: var(--radius-md);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: var(--primary-bg);
}
.nav-link i.fa-chevron-down { font-size: 10px; }

/* Mega dropdown */
.nav-dropdown { position: relative; }
.dropdown-mega {
    position: absolute;
    top: 100%;
    left: -100px;
    width: 720px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s;
    border: 1px solid var(--gray-100);
}
.nav-dropdown:hover .dropdown-mega {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.mega-section h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.mega-section h4 i { color: var(--primary); font-size: 16px; }
.mega-section p { font-size: 12px; color: var(--gray-500); }
.mega-section ul { list-style: none; }
.mega-section ul li a {
    display: block;
    padding: 4px 0;
    font-size: 13px;
    color: var(--gray-600);
}
.mega-section ul li a:hover { color: var(--primary); }

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.btn-login {
    padding: 8px 20px;
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}
.btn-login:hover { color: var(--primary); }
.btn-register {
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s;
}
.btn-register:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.nav-mobile-toggle { display: none; }

/* === Hero Section === */
.hero {
    background: var(--gradient-hero);
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}
.hero-bg-particles {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.04) 0%, transparent 50%),
                radial-gradient(circle at 60% 80%, rgba(139, 92, 246, 0.03) 0%, transparent 50%);
}

.hero-slide {
    display: flex;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    gap: 60px;
}

.hero-content { flex: 1; position: relative; z-index: 2; }
.hero-badge {
    display: inline-flex;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-full);
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 20px;
}
.gradient-text {
    background: linear-gradient(135deg, #8B5CF6, #A78BFA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 18px;
    color: var(--gray-600);
    margin-bottom: 32px;
    max-width: 520px;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}
.hero-stats {
    display: flex;
    gap: 40px;
}
.stat-item { text-align: left; }
.stat-num {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
}
.stat-label {
    font-size: 13px;
    color: var(--gray-500);
}

/* Hero Visual */
.hero-visual { flex: 1; position: relative; z-index: 1; }
.hero-mockup { perspective: 1000px; }
.mockup-window {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    transform: rotateY(-5deg) rotateX(2deg);
    transition: transform 0.5s;
}
.mockup-window:hover { transform: rotateY(0) rotateX(0); }
.mockup-toolbar {
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}
.mockup-toolbar .dot { width: 10px; height: 10px; border-radius: 50%; }
.mockup-toolbar .red { background: #ef4444; }
.mockup-toolbar .yellow { background: #eab308; }
.mockup-toolbar .green { background: #22c55e; }
.mockup-title {
    margin-left: 8px;
    font-size: 11px;
    color: var(--gray-500);
    font-weight: 500;
}
.mockup-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
/* 产品头 */
.mock-product-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-100);
}
.mock-product-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--gray-50);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}
.mock-product-info {
    flex: 1;
}
.mock-product-info strong {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 2px;
}
.mock-product-info span {
    font-size: 10px;
    color: var(--gray-500);
}
.mock-score {
    text-align: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(79, 70, 229, 0.08);
    border: 2px solid var(--primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.mock-score strong {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}
.mock-score span {
    font-size: 8px;
    color: var(--gray-500);
}
/* 六维评分 */
.mock-dimensions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.mock-dim {
    display: flex;
    align-items: center;
    gap: 8px;
}
.mock-dim-label {
    font-size: 10.5px;
    color: var(--gray-600);
    width: 52px;
    flex-shrink: 0;
}
.mock-dim-bar {
    flex: 1;
    height: 6px;
    background: var(--gray-100);
    border-radius: 3px;
    overflow: hidden;
}
.mock-dim-bar i {
    display: block;
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    font-style: normal;
}
.mock-dim-bar.orange i { background: #ea580c; }
.mock-dim-bar.green i { background: #059669; }
.mock-dim-bar.purple i { background: #7c3aed; }
.mock-dim-bar.teal i { background: #0d9488; }
.mock-dim strong {
    font-size: 11px;
    font-weight: 600;
    color: var(--gray-700);
    width: 24px;
    text-align: right;
}
/* AI洞察 */
.mock-insight {
    padding: 10px 12px;
    background: #f5f3ff;
    border-radius: 8px;
    border-left: 3px solid var(--primary);
}
.mock-insight-badge {
    font-size: 10px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.mock-insight-badge i {
    font-size: 10px;
}
.mock-insight p {
    font-size: 11px;
    color: var(--gray-600);
    line-height: 1.5;
    margin: 0;
}
/* 底部指标 */
.mock-metrics {
    display: flex;
    gap: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--gray-100);
}
.mock-metrics > div {
    flex: 1;
    text-align: center;
}
.mock-metrics span {
    display: block;
    font-size: 9px;
    color: var(--gray-500);
    margin-bottom: 2px;
}
.mock-metrics strong {
    font-size: 12px;
    font-weight: 700;
    color: var(--gray-800);
}
.mock-metrics small {
    font-size: 10px;
}

.hero-slider-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}
.hero-slider-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: all 0.3s;
}
.hero-slider-dots .dot.active {
    width: 24px;
    border-radius: 4px;
    background: var(--primary);
}


/* === 快速介绍卡片 === */
.quick-intro {
    padding: 80px 0;
    background: #fff;
}
.intro-cards {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}
.intro-card {
    text-align: center;
    padding: 28px 16px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    transition: all 0.3s;
}
.intro-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}
.intro-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--primary);
}
.intro-card h3 { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.intro-card p { font-size: 12px; color: var(--gray-500); line-height: 1.5; }

/* === Section Header === */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}
.section-header p {
    font-size: 16px;
    color: var(--gray-500);
}

/* === Features Section === */
.features {
    padding: 100px 0;
    background: var(--gray-50);
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}
.tab-btn {
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    background: #fff;
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
}
.tab-btn:hover { border-color: var(--primary-light); color: var(--primary); }
.tab-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}
.tab-btn.active i { color: #fff; }

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.4s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Feature Showcase */
.feature-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.showcase-info h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--gray-900);
}
.showcase-info > p {
    font-size: 16px;
    color: var(--gray-500);
    margin-bottom: 24px;
    line-height: 1.7;
}
.feature-list { list-style: none; margin-bottom: 32px; }
.feature-list li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 10px;
}
.feature-list li i { color: var(--success); }

/* Showcase Card Visual */
.showcase-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-100);
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.card-title { font-weight: 600; font-size: 15px; }
.card-badge {
    padding: 4px 10px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
}
.score-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.score-item { text-align: center; }
.score-ring {
    width: 64px;
    height: 64px;
    margin: 0 auto 8px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    border-radius: 50%;
}
.score-ring span { font-size: 18px; font-weight: 700; color: var(--primary); }
.score-item label { font-size: 12px; color: var(--gray-500); }
.card-result {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(16, 185, 129, 0.05);
    border-radius: var(--radius-md);
}
.result-badge {
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
}
.result-badge.good { background: var(--success); color: #fff; }
.result-text { font-size: 13px; color: var(--gray-600); }

/* Keyword card */
.kw-table { font-size: 13px; }
.kw-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 8px;
    padding: 10px 12px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 4px;
}
.kw-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 8px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--gray-100);
}
.kw-row .high { color: var(--danger); font-weight: 500; }
.kw-row .mid { color: var(--warning); font-weight: 500; }
.kw-row .low { color: var(--success); font-weight: 500; }

/* Listing card */
.listing-preview { font-size: 13px; }
.listing-title, .listing-bullets { margin-bottom: 16px; }
.listing-preview .tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 8px;
}
.listing-bullets ul { list-style: none; padding-left: 0; }
.listing-bullets li { padding: 4px 0; color: var(--gray-600); }

/* Ads card */
.ads-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.metric {
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    text-align: center;
}
.metric-label { display: block; font-size: 12px; color: var(--gray-500); margin-bottom: 4px; }
.metric-value { font-size: 24px; font-weight: 700; }
.metric-value.up { color: var(--success); }
.metric-value.down { color: var(--success); }
.metric-value i { font-size: 14px; }

/* === Data Stats === */
.data-stats {
    padding: 80px 0;
    background: #fff;
    border-top: 1px solid var(--gray-100);
    border-bottom: 1px solid var(--gray-100);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}
.stat-block {
    text-align: center;
    padding: 32px;
}
.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}
.stat-desc {
    font-size: 14px;
    color: var(--gray-500);
}

/* === Testimonials === */
.testimonials {
    padding: 100px 0;
    background: #fff;
    overflow: hidden;
}
.testimonial-slider { overflow: hidden; position: relative; }
.testimonial-track {
    display: flex;
    gap: 24px;
    animation: scroll-testimonials 30s linear infinite;
}
@keyframes scroll-testimonials {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.testimonial-card {
    min-width: 360px;
    padding: 28px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
}
.testimonial-content p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}
.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}
.author-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
}
.author-name { display: block; font-weight: 600; font-size: 14px; }
.author-title { font-size: 12px; color: var(--gray-500); }

/* === Pricing Preview === */
.pricing-preview {
    padding: 100px 0;
    background: var(--gray-50);
}
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.pricing-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--gray-200);
    text-align: center;
    position: relative;
    transition: all 0.3s;
}
.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}
.pricing-card.featured:hover { transform: scale(1.05) translateY(-4px); }
.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
}
.pricing-name { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.pricing-price {
    font-size: 16px;
    color: var(--gray-500);
    margin-bottom: 8px;
}
.pricing-price span { font-size: 40px; font-weight: 800; color: var(--gray-900); }
.pricing-desc { font-size: 13px; color: var(--gray-500); margin-bottom: 24px; }
.pricing-card ul { list-style: none; text-align: left; margin-bottom: 28px; }
.pricing-card ul li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 8px;
}
.pricing-card ul li i { color: var(--success); }

/* === CTA Section === */
.cta-section {
    padding: 100px 0;
    background: var(--primary-bg);
    text-align: center;
}
.cta-content h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}
.cta-content p {
    font-size: 16px;
    color: var(--gray-600);
    margin-bottom: 32px;
}
.cta-content .btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.25);
}
.cta-content .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.35);
}
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

/* === Footer === */
.footer {
    background: var(--gray-50);
    padding: 64px 0 24px;
    color: var(--gray-600);
    border-top: 1px solid var(--gray-200);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.footer-logo i { font-size: 24px; color: var(--primary); }
.footer-logo span { font-size: 18px; font-weight: 700; color: var(--gray-900); }
.footer-brand p { font-size: 14px; margin-bottom: 16px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
    width: 36px;
    height: 36px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    transition: all 0.2s;
}
.footer-social a:hover { background: var(--primary); color: #fff; }

.footer-links h4 { font-size: 14px; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; }
.footer-links a {
    display: block;
    padding: 4px 0;
    font-size: 13px;
    color: var(--gray-500);
}
.footer-links a:hover { color: var(--primary); }

.footer-contact h4 { font-size: 14px; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; }
.qr-codes { display: flex; gap: 16px; }
.qr-item { text-align: center; }
.qr-placeholder {
    width: 80px;
    height: 80px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--gray-400);
    margin-bottom: 6px;
}
.qr-item span { font-size: 11px; }

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
    text-align: center;
    font-size: 12px;
}
.footer-bottom a { color: var(--primary-light); }


/* ============================================================
   LOGIN PAGE
   ============================================================ */
.login-page { background: #fff; }
.login-container {
    display: flex;
    min-height: 100vh;
}

/* 左侧品牌区 */
.login-brand {
    flex: 1;
    background: linear-gradient(135deg, #F3F0FF 0%, #F8F7FF 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    overflow: hidden;
}
.brand-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 40%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
}
.brand-content { position: relative; z-index: 2; color: var(--gray-900); }
.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}
.brand-logo i { font-size: 32px; color: var(--primary); }
.brand-logo span { font-size: 24px; font-weight: 700; }
.brand-content h1 {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
}
.brand-content p {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 32px;
}
.brand-features { display: flex; flex-direction: column; gap: 12px; }
.brand-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--gray-700);
}
.brand-feature i { color: var(--primary); }

.brand-decoration { position: absolute; inset: 0; pointer-events: none; }
.deco-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(139, 92, 246, 0.12);
}
.deco-circle.c1 { width: 300px; height: 300px; top: -80px; right: -60px; }
.deco-circle.c2 { width: 200px; height: 200px; bottom: 40px; left: -40px; }
.deco-circle.c3 { width: 150px; height: 150px; top: 50%; right: 20%; }

/* 右侧登录表单 */
.login-form-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    position: relative;
}
.login-form-wrapper {
    width: 100%;
    max-width: 420px;
}
.form-header { margin-bottom: 32px; }
.form-header h2 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.form-header p { font-size: 14px; color: var(--gray-500); }

/* Login Tabs */
.login-tabs {
    display: flex;
    gap: 4px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 28px;
}
.login-tab {
    flex: 1;
    padding: 10px;
    text-align: center;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-500);
    transition: all 0.2s;
}
.login-tab.active {
    background: #fff;
    color: var(--gray-800);
    box-shadow: var(--shadow-sm);
}

/* Form Panels */
.login-panel { display: none; }
.login-panel.active { display: block; animation: fadeIn 0.3s; }

/* Form Groups */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.input-wrapper {
    display: flex;
    align-items: center;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 0 14px;
    transition: all 0.2s;
    background: #fff;
}
.input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}
.input-wrapper i { color: var(--gray-400); font-size: 16px; margin-right: 10px; }
.input-wrapper input {
    flex: 1;
    border: none;
    outline: none;
    padding: 12px 0;
    font-size: 14px;
}
.toggle-password { color: var(--gray-400); padding: 4px; }
.toggle-password:hover { color: var(--gray-600); }

.sms-input .btn-sms-code {
    white-space: nowrap;
    padding: 6px 14px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s;
}
.sms-input .btn-sms-code:hover { background: var(--primary); color: #fff; }
.sms-input .btn-sms-code:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    pointer-events: none;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--gray-600);
    cursor: pointer;
}
.forgot-link { font-size: 13px; color: var(--primary); }

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
}
.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.3);
}

/* WeChat QR */
.wechat-qr { text-align: center; padding: 20px 0; }
.qr-box {
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}
.qr-placeholder-login {
    position: relative;
    font-size: 64px;
    color: #22c55e;
}
.qr-scan-line {
    position: absolute;
    top: 0;
    left: -30px;
    right: -30px;
    height: 2px;
    background: var(--primary);
    animation: scan 2s ease-in-out infinite;
}
@keyframes scan { 0%,100% { top: 0; } 50% { top: 100%; } }
.qr-tip { font-size: 14px; color: var(--gray-500); margin-bottom: 12px; }
.btn-refresh-qr {
    padding: 8px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--gray-600);
}

.login-agreement {
    margin-top: 24px;
    text-align: center;
    font-size: 12px;
    color: var(--gray-400);
}
.login-agreement a { color: var(--primary); }

.login-register {
    margin-top: 16px;
    text-align: center;
    font-size: 14px;
    color: var(--gray-500);
}
.register-link { color: var(--primary); font-weight: 500; }

.login-legal-footer {
    position: absolute;
    right: 24px;
    bottom: 20px;
    left: 24px;
    text-align: center;
    font-size: 12px;
    line-height: 1.5;
    color: var(--gray-400);
}
.login-legal-footer a { color: var(--primary-light); }

/* Register Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}
.modal-overlay.show { display: flex; }
.modal-content {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 440px;
    width: 90%;
    position: relative;
}
.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: all 0.2s;
}
.modal-close:hover { background: var(--gray-100); color: var(--gray-600); }
.register-modal h2 { font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.register-modal > p { font-size: 14px; color: var(--gray-500); margin-bottom: 24px; }

/* ============================================================
   WORKSPACE PAGE
   ============================================================ */
.workspace-page { overflow: hidden; }
.workspace-layout {
    display: flex;
    height: 100vh;
}

/* === Sidebar === */
.sidebar {
    width: var(--sidebar-width);
    background: #fff;
    border-right: 1px solid var(--gray-100);
    display: flex;
    flex-direction: column;
    transition: width 0.3s;
    overflow-y: auto;
    overflow-x: hidden;
}
.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--gray-100);
}
.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-logo i {
    font-size: 22px;
    color: var(--primary);
}
.sidebar-logo span {
    font-size: 18px;
    font-weight: 700;
}
.sidebar-collapse-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: all 0.2s;
}
.sidebar-collapse-btn:hover { background: var(--gray-100); color: var(--gray-600); }

/* Nav Items */
.sidebar-nav {
    padding: 12px;
    flex: 1;
}
.nav-item {
    border-radius: var(--radius-md);
    margin-bottom: 2px;
    cursor: pointer;
    transition: all 0.2s;
}
.nav-item-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}
.nav-item-header:hover { background: var(--gray-50); color: var(--gray-800); }
.nav-item.active .nav-item-header {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 600;
}
.nav-item-header i { width: 18px; text-align: center; font-size: 15px; }
.nav-badge {
    margin-left: auto;
    padding: 2px 6px;
    background: var(--danger);
    color: #fff;
    font-size: 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* Nav Groups */
.nav-group { margin-bottom: 2px; }
.nav-group-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}
.nav-group-header:hover { background: var(--gray-50); color: var(--gray-800); }
.nav-group-header i { width: 18px; text-align: center; font-size: 15px; }
.nav-group-header .toggle-icon {
    margin-left: auto;
    font-size: 10px;
    transition: transform 0.3s;
}
.nav-group-items {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
}
.nav-group-items.expanded { max-height: 300px; }
.nav-sub-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px 8px 40px;
    font-size: 13px;
    color: var(--gray-500);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}
.nav-sub-item:hover { color: var(--primary); background: var(--primary-bg); }
.nav-sub-item i { font-size: 12px; width: 14px; }

.nav-divider {
    height: 1px;
    background: var(--gray-100);
    margin: 12px 0;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--gray-100);
}
.credits-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--gray-600);
    margin-bottom: 8px;
}
.credits-info i { color: var(--warning); }
.btn-upgrade {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s;
}
.btn-upgrade:hover {
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

/* === Main Content === */
.workspace-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--gray-50);
}

/* Header */
.workspace-header {
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
}
.header-search { flex: 1; max-width: 600px; }
.search-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}
.search-box:focus-within {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}
.search-box i { color: var(--gray-400); }
.search-box input {
    flex: 1;
    border: none;
    outline: none;
    background: none;
    font-size: 14px;
}
.search-box kbd {
    padding: 2px 6px;
    background: var(--gray-200);
    border-radius: 4px;
    font-size: 11px;
    color: var(--gray-500);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}
.header-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    position: relative;
    transition: all 0.2s;
}
.header-btn:hover { background: var(--gray-100); color: var(--gray-700); }
.header-btn .badge {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 16px;
    height: 16px;
    background: var(--danger);
    color: #fff;
    font-size: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* User Dropdown */
.user-dropdown {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
}
.user-dropdown:hover { background: var(--gray-50); }
.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 13px;
    font-weight: 600;
}
.user-info { display: flex; flex-direction: column; }
.user-name { font-size: 13px; font-weight: 600; }
.user-plan { font-size: 11px; color: var(--primary); }
.user-dropdown > i { font-size: 10px; color: var(--gray-400); }

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    min-width: 180px;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-100);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(5px);
    transition: all 0.2s;
    z-index: 100;
}
.user-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--gray-600);
    border-radius: var(--radius-sm);
}
.dropdown-menu a:hover { background: var(--gray-50); color: var(--gray-800); }
.dropdown-menu a.logout:hover { background: rgba(239, 68, 68, 0.05); color: var(--danger); }
.menu-divider { height: 1px; background: var(--gray-100); margin: 4px 0; }

/* === Content Panels === */
.content-panel {
    display: none;
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}
.content-panel.active { display: flex; flex-direction: column; }

/* Page Header */
.page-header {
    margin-bottom: 24px;
}
.page-header h1 {
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}
.page-header h1 i { color: var(--primary); font-size: 22px; }
.page-header p { font-size: 14px; color: var(--gray-500); }

/* === Chat Layout === */
.chat-layout { display: flex; flex: 1; gap: 0; height: 100%; }
.chat-sidebar {
    width: 240px;
    background: #fff;
    border-right: 1px solid var(--gray-100);
    padding: 16px;
    display: flex;
    flex-direction: column;
}
.btn-new-chat {
    width: 100%;
    padding: 10px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-bottom: 16px;
}
.chat-history { flex: 1; overflow-y: auto; }
.chat-history-item {
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-bottom: 4px;
    transition: all 0.2s;
}
.chat-history-item:hover { background: var(--gray-50); }
.chat-history-item.active { background: var(--primary-bg); }
.chat-history-item i { font-size: 12px; color: var(--gray-400); margin-right: 8px; }
.chat-history-item span { font-size: 13px; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-history-item small { font-size: 11px; color: var(--gray-400); }

/* Chat Main */
.chat-main { flex: 1; display: flex; flex-direction: column; }
.chat-model-selector {
    padding: 12px 20px;
    border-bottom: 1px solid var(--gray-100);
    font-size: 13px;
    color: var(--gray-500);
    background: #fff;
}
.chat-model-selector select {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-size: 13px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}
.message {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}
.message.user { justify-content: flex-end; }
.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.message.assistant .message-avatar {
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 16px;
}
.message.user .message-avatar {
    background: var(--gradient-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
}
.message-content {
    max-width: 70%;
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    line-height: 1.7;
}
.message.assistant .message-content {
    background: #fff;
    border: 1px solid var(--gray-100);
}
.message.user .message-content {
    background: var(--gradient-primary);
    color: #fff;
}
.message-actions {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}
.message-actions button {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    font-size: 12px;
}
.message-actions button:hover { background: var(--gray-100); color: var(--gray-600); }

.ai-analysis-card {
    margin-top: 12px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}
.ai-analysis-card h4 { font-size: 14px; margin-bottom: 12px; }
.ai-analysis-card ul { list-style: none; }
.ai-analysis-card li { padding: 4px 0; font-size: 13px; color: var(--gray-600); }
.analysis-action { display: flex; gap: 8px; margin-top: 12px; }

/* Chat Input */
.chat-input-area {
    padding: 16px 20px;
    background: #fff;
    border-top: 1px solid var(--gray-100);
}
.chat-input-tools {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}
.chat-input-tools button {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: all 0.2s;
}
.chat-input-tools button:hover { background: var(--gray-100); color: var(--primary); }

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    transition: all 0.2s;
}
.chat-input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}
.chat-input-wrapper textarea {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-size: 14px;
    line-height: 1.5;
    max-height: 120px;
}
.btn-send {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.2s;
}
.btn-send:hover { transform: scale(1.05); }

.chat-input-hint {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: 11px;
    color: var(--gray-400);
}

/* === Filter Section === */
.filter-section {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--gray-100);
    margin-bottom: 24px;
}
.filter-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.filter-item label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-600);
    margin-bottom: 6px;
}
.filter-item input, .filter-item select {
    width: 100%;
    padding: 9px 12px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: all 0.2s;
}
.filter-item input:focus, .filter-item select:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}
.range-input { display: flex; align-items: center; gap: 8px; }
.range-input input { flex: 1; }
.range-input span { color: var(--gray-400); }

.filter-actions { display: flex; gap: 12px; }

/* === Results Section === */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.results-header h3 { font-size: 16px; font-weight: 600; }
.result-count { color: var(--gray-400); font-size: 13px; font-weight: 400; }
.results-actions { display: flex; gap: 8px; }

/* Product Card */
.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--gray-200);
    margin-bottom: 16px;
    transition: all 0.2s;
}
.product-card:hover { box-shadow: var(--shadow-md); }
.product-card.recommended { border-color: var(--success); border-width: 2px; }
.product-badge {
    display: inline-block;
    margin-bottom: 12px;
    font-size: 13px;
    font-weight: 600;
}
.product-info { display: flex; gap: 16px; margin-bottom: 16px; }
.product-image {
    width: 80px;
    height: 80px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}
.img-placeholder { font-size: 32px; color: var(--gray-300); }
.product-details h4 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.product-meta { display: flex; gap: 16px; font-size: 13px; color: var(--gray-600); margin-bottom: 4px; }
.product-meta span { display: flex; align-items: center; gap: 4px; }
.product-asin { font-size: 12px; color: var(--gray-400); }

/* Score Bars */
.product-scores { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; }
.score-bar { display: flex; align-items: center; gap: 8px; }
.score-label { font-size: 12px; color: var(--gray-500); width: 40px; }
.bar { flex: 1; height: 6px; background: var(--gray-100); border-radius: 3px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary); border-radius: 3px; transition: width 0.5s; }
.bar-fill.good { background: var(--success); }
.bar-fill.medium { background: var(--warning); }
.bar-fill.low { background: var(--success); }
.score-val { font-size: 12px; font-weight: 600; width: 24px; }

.product-actions { display: flex; gap: 8px; }

/* === Input Section (品类分析/流量词等) === */
.input-section { margin-bottom: 24px; }
.input-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--gray-100);
}
.input-lg {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all 0.2s;
}
.input-lg:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}
.form-row { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.form-row-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-actions { display: flex; align-items: center; gap: 16px; margin-top: 20px; }
.cost-hint { font-size: 12px; color: var(--gray-400); }

.input-with-action { display: flex; gap: 12px; }
.input-with-action input { flex: 1; }

.input-tabs { display: flex; gap: 4px; margin-bottom: 20px; }
.input-tab {
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-500);
    border: 1px solid var(--gray-200);
    transition: all 0.2s;
}
.input-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.tag-input {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    min-height: 44px;
    align-items: center;
}
.tag {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 13px;
}
.tag i { font-size: 10px; cursor: pointer; }
.tag-input input { border: none; outline: none; flex: 1; min-width: 120px; font-size: 14px; }

.radio-group { display: flex; gap: 20px; }
.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}
.radio-label { font-size: 14px; }
.radio-label small { color: var(--gray-400); }

textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 14px;
    resize: vertical;
    transition: all 0.2s;
}
textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

/* === Course Grid === */
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.course-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-100);
    transition: all 0.3s;
}
.course-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.course-thumb {
    height: 140px;
    background: linear-gradient(135deg, #F3F0FF, #EDE9FE);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--primary);
}
.course-info { padding: 16px; }
.course-info h4 { font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.course-info p { font-size: 12px; color: var(--gray-500); margin-bottom: 8px; }
.course-meta { font-size: 11px; color: var(--gray-400); }

/* === Plugin Card === */
.plugin-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--gray-100);
    display: flex;
    gap: 24px;
    align-items: center;
}
.plugin-icon {
    width: 72px;
    height: 72px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: #8B5CF6;
}
.plugin-info { flex: 1; }
.plugin-info h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.plugin-info p { font-size: 14px; color: var(--gray-500); margin-bottom: 12px; }
.plugin-features { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.plugin-features li {
    font-size: 13px;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 6px;
}
.plugin-features li i { color: var(--success); font-size: 12px; }
.plugin-download { text-align: center; }
.plugin-version { display: block; margin-top: 8px; font-size: 11px; color: var(--gray-400); }

/* === MCP Grid === */
.mcp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.mcp-tool-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--gray-100);
    text-align: center;
    transition: all 0.3s;
}
.mcp-tool-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.tool-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 20px;
}
.mcp-tool-card h4 { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.mcp-tool-card p { font-size: 12px; color: var(--gray-500); margin-bottom: 12px; }

/* === Skill Grid === */
.skill-header-actions { display: flex; gap: 12px; margin-bottom: 24px; }
.skill-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.skill-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--gray-100);
    transition: all 0.3s;
}
.skill-card:hover { box-shadow: var(--shadow-md); }
.skill-icon { font-size: 28px; margin-bottom: 12px; }
.skill-card h4 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.skill-card p { font-size: 13px; color: var(--gray-500); margin-bottom: 12px; }
.skill-meta { display: flex; gap: 16px; font-size: 12px; color: var(--gray-400); margin-bottom: 12px; }

/* === Responsive === */
@media (max-width: 1024px) {
    .intro-cards { grid-template-columns: repeat(3, 1fr); }
    .feature-showcase { grid-template-columns: 1fr; gap: 32px; }
    .pricing-cards { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .filter-grid { grid-template-columns: repeat(2, 1fr); }
    .mcp-grid { grid-template-columns: repeat(2, 1fr); }
    .course-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .hero-slide { flex-direction: column; text-align: center; }
    .hero h1 { font-size: 32px; }
    .hero-visual { display: none; }
    .hero-stats { justify-content: center; }
    .intro-cards { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-menu { display: none; }
    .nav-mobile-toggle { display: block; font-size: 20px; }
    .login-brand { display: none; }
    .login-form-area { padding: 24px; }

    /* feature-showcase: prevent grid items from overriding 1fr with min-content */
    .feature-showcase { gap: 24px; }
    .showcase-info, .showcase-visual { min-width: 0; overflow: hidden; }

    /* Testimonial slider: prevent fixed min-width cards from overflowing the
       viewport on narrow screens. Cards shrink to fill available width. */
    .testimonials { overflow: hidden; }
    .testimonial-track { animation: none; flex-wrap: wrap; }
    .testimonial-card {
        min-width: 0;
        width: 100%;
        flex-shrink: 0;
    }

    /* Stats grid: reduce gap and font-size so 4-stat blocks fit 2-column layout */
    .stats-grid { gap: 12px; }
    .stat-block { padding: 20px 12px; overflow: hidden; }
    .stat-number { font-size: 24px; word-break: break-word; overflow-wrap: break-word; }
    .stat-desc { font-size: 12px; }
}

/* ═══ Hero Slide 2: 关键词表格 mockup ═══ */
.mock-keyword-table {
    font-size: 10.5px;
}
.mock-kw-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 6px;
    padding: 6px 8px;
    background: var(--gray-50);
    border-radius: 4px;
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: 4px;
}
.mock-kw-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 6px;
    padding: 7px 8px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    align-items: center;
}
.mock-kw-row:last-child {
    border-bottom: none;
}
.mock-kw-name {
    font-weight: 500;
    color: var(--gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.mock-positive {
    color: #10b981;
    font-weight: 600;
}

/* ═══ Hero Slide 3: Listing预览 mockup ═══ */
.mock-listing-preview {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.mock-listing-section {
    padding: 8px 10px;
    border: 1px solid var(--gray-100);
    border-radius: 6px;
}
.mock-listing-label {
    display: block;
    font-size: 9px;
    font-weight: 700;
    color: var(--gray-400);
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}
.mock-listing-text {
    font-size: 11px;
    color: var(--gray-700);
    line-height: 1.5;
    margin: 0;
}
.mock-listing-bullets {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mock-listing-bullets li {
    font-size: 10.5px;
    color: var(--gray-600);
    line-height: 1.4;
    padding-left: 8px;
    border-left: 2px solid var(--primary);
}
.mock-listing-bullets li strong {
    color: var(--gray-800);
}

/* ═══ Hero Slider 轮播动画 ═══ */
.hero-slide {
    display: none;
}
.hero-slide.active {
    display: flex;
    animation: slideIn 0.5s ease;
}
@keyframes slideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}
.hero-slider-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}
.hero-slider-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: all 0.2s;
}
.hero-slider-dots .dot.active {
    background: var(--primary);
    width: 28px;
    border-radius: 5px;
}

/* ── Auth error / disabled state (UI-AUTH-003) ────────────────────────────── */

/* Error message area — visible when shown; hidden via [hidden] attribute */
.auth-error-msg {
    margin: 8px 0 4px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    font-size: 13px;
    line-height: 1.5;
    word-break: break-word;
}

/* Hidden state — controlled exclusively by the hidden attribute */
.auth-error-msg[hidden] {
    display: none;
}

.auth-error-msg.is-success {
    background: #ecfdf5;
    border-color: #a7f3d0;
    color: #047857;
}

#forcedPasswordModal .btn-secondary {
    margin-top: 10px;
    background: var(--gray-100);
    color: var(--gray-700);
    box-shadow: none;
}

#forcedPasswordModal .btn-secondary:hover {
    background: var(--gray-200);
}

/* Button disabled state — preserves visual hierarchy, signals in-flight request */
.btn-submit:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    pointer-events: none;
}