/* ==========================================
   Agent Skills & Claude Skills 高级UI样式
   Modern, Premium Design System
   ========================================== */

/* CSS变量定义 - 精致配色方案 */
:root {
    /* 主色调 - 深邃紫蓝渐变 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #a5b4fc;
    
    /* 强调色 - 科技感青色 */
    --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    --accent-color: #0ea5e9;
    
    /* 高亮色 */
    --highlight-gradient: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
    --highlight-color: #f59e0b;
    
    /* 文字色 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-light: #cbd5e1;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    
    /* 玻璃效果 */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    
    /* 边框和阴影 */
    --border-color: rgba(148, 163, 184, 0.2);
    --border-light: rgba(255, 255, 255, 0.1);
    
    /* 高级阴影 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    --shadow-glow-accent: 0 0 40px rgba(14, 165, 233, 0.3);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 基础重置 */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==========================================
   导航栏 - 玻璃拟态风格
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-img {
    width: 44px;
    height: 44px;
    transition: var(--transition);
}

.logo:hover .logo-img {
    transform: rotate(-10deg) scale(1.05);
}

.logo-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.375rem;
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-full);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.08);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.nav-toggle:hover {
    background: rgba(102, 126, 234, 0.08);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==========================================
   主横幅 - 沉浸式视觉体验
   ========================================== */
.hero {
    position: relative;
    padding: 180px 0 140px;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 50%, #e0e7ff 100%);
}

/* 动态背景装饰 */
.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: -20%;
    width: 80%;
    height: 120%;
    background: radial-gradient(ellipse at center, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
    animation: floatBg 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -20%;
    width: 70%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.12) 0%, transparent 70%);
    animation: floatBg 25s ease-in-out infinite reverse;
}

@keyframes floatBg {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(3%, 3%) rotate(2deg); }
    66% { transform: translate(-2%, 2%) rotate(-1deg); }
}

/* 装饰性几何图形 */
.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.75rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-primary) 0%, #4338ca 50%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.1s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   CTA按钮 - 精致交互
   ========================================== */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2.25rem;
    background: var(--primary-gradient);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg), 0 4px 24px rgba(102, 126, 234, 0.35);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition-slow);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-secondary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    box-shadow: none;
}

.cta-secondary:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-lg), 0 4px 24px rgba(102, 126, 234, 0.35);
}

.cta-buttons {
    display: flex;
    gap: 1.25rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   通用区块样式
   ========================================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-alt {
    background: var(--bg-primary);
}

.section h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 3.5rem 0 1.75rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-dark);
}

.section-intro {
    text-align: center;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3.5rem;
    font-size: 1.125rem;
    line-height: 1.8;
}

/* ==========================================
   内容卡片 - 玻璃拟态风格
   ========================================== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
    margin-top: 3.5rem;
}

.content-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.content-card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: var(--radius-xl);
    margin-bottom: 1.5rem;
}

.content-card h3 {
    margin: 0 0 1rem;
    font-size: 1.375rem;
}

.content-card p {
    color: var(--text-secondary);
    line-height: 1.85;
    font-size: 0.9375rem;
}

/* ==========================================
   特性列表 - 渐变边框
   ========================================== */
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-item {
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    position: relative;
    transition: var(--transition);
}

.feature-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 2px;
    background: var(--primary-gradient);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.5;
    transition: var(--transition);
}

.feature-item:hover::before {
    opacity: 1;
}

.feature-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.125rem;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.75;
}

/* ==========================================
   功能网格 - 悬浮卡片
   ========================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
    margin-top: 2.5rem;
}

.feature-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2.25rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
}

.feature-card::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-2xl);
    background: var(--primary-gradient);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    border-radius: var(--radius-xl);
    margin: 0 auto 1.5rem;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, #ddd6fe, #bfdbfe);
}

.feature-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.feature-card h4 {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ==========================================
   企业功能 - 渐变背景卡片
   ========================================== */
.enterprise-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
    margin-top: 2.5rem;
}

.enterprise-item {
    background: var(--primary-gradient);
    color: white;
    padding: 2.5rem;
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.enterprise-item::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    transition: var(--transition);
}

.enterprise-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.enterprise-item:hover::before {
    transform: translate(-20%, 20%);
}

.enterprise-item h4 {
    color: white;
    font-size: 1.375rem;
    margin-bottom: 1rem;
}

.enterprise-item p {
    opacity: 0.92;
    line-height: 1.85;
    font-size: 0.9375rem;
}

/* ==========================================
   应用场景 - 顶部渐变条
   ========================================== */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
    margin-top: 3.5rem;
}

.use-case-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2.25rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--primary-gradient);
}

.use-case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.use-case-card h3 {
    margin: 0.5rem 0 0.5rem;
    font-size: 1.25rem;
}

.use-case-card h4 {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 1rem;
}

.use-case-card p {
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ==========================================
   平台列表 - 图标复选框
   ========================================== */
.platform-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.platform-item {
    padding: 1.75rem;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.platform-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.platform-item h4 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: 1.0625rem;
}

.platform-item h4::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.platform-item p {
    color: var(--text-secondary);
    margin-top: 0.75rem;
    padding-left: 2.75rem;
    line-height: 1.7;
}

/* ==========================================
   前提条件框 - 警告样式
   ========================================== */
.prerequisites-box {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    margin-bottom: 3.5rem;
    border: 1px solid rgba(245, 158, 11, 0.2);
    position: relative;
    overflow: hidden;
}

.prerequisites-box::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: var(--highlight-gradient);
}

.prerequisites-box h3 {
    margin-top: 0;
    color: #92400e;
    font-size: 1.375rem;
}

.prerequisites-box h4 {
    color: #b45309;
}

.prerequisites-box > p {
    color: #78350f;
    margin-bottom: 1.75rem;
    font-size: 1.0625rem;
    line-height: 1.7;
}

.plan-requirements {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.plan-item {
    background: rgba(255, 255, 255, 0.8);
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.plan-item h4 {
    color: #92400e;
    margin-bottom: 0.625rem;
    font-size: 1.0625rem;
}

.plan-item p {
    color: #78350f;
    font-size: 0.9375rem;
    margin: 0;
    line-height: 1.65;
}

/* ==========================================
   详细步骤 - 时间线风格
   ========================================== */
.detailed-steps {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin: 2.5rem 0 3.5rem;
    position: relative;
}

.detailed-steps::before {
    content: '';
    position: absolute;
    left: 48px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
    opacity: 0.3;
}

.detailed-step {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    padding-left: 5.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition);
}

.detailed-step:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.875rem;
}

.step-badge {
    position: absolute;
    left: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35);
}

.step-header h4 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.detailed-step p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.7;
}

/* ==========================================
   创建步骤 - 图标卡片
   ========================================== */
.create-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.75rem;
    margin: 2.5rem 0 3.5rem;
}

.create-step {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
}

.create-step::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: var(--radius-2xl);
    background: var(--primary-gradient);
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.create-step:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.create-step:hover::after {
    opacity: 1;
}

.create-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    background: linear-gradient(135deg, #eef2ff, #ddd6fe);
    border-radius: var(--radius-xl);
    margin: 0 auto 1.5rem;
    transition: var(--transition);
}

.create-step:hover .create-icon {
    transform: scale(1.1) rotate(-5deg);
}

.create-step h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.create-step p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    text-align: left;
    line-height: 1.75;
}

/* ==========================================
   Skills类型 - 顶部渐变边框
   ========================================== */
.skills-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
    margin: 2.5rem 0 3.5rem;
}

.skill-type-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.skill-type-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.skill-type-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.skill-type-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.875rem;
    font-size: 1.0625rem;
}

.skill-type-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin: 0;
    line-height: 1.7;
}

/* ==========================================
   FAQ列表 - 问号图标
   ========================================== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2.5rem 0 3.5rem;
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.faq-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.625rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.0625rem;
}

.faq-item h4::before {
    content: '?';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--accent-gradient);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
}

.faq-item p {
    color: var(--text-secondary);
    margin: 0;
    padding-left: 2.75rem;
    line-height: 1.7;
}

/* ==========================================
   快速开始 - 三步卡片
   ========================================== */
.quick-start-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0 3.5rem;
}

.quick-start-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition);
}

.quick-start-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.qs-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    background: rgba(102, 126, 234, 0.12);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 0.75rem;
}

.quick-start-card h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.quick-start-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ==========================================
   模板区块 - 代码展示
   ========================================== */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.75rem;
    margin: 2rem 0 3.5rem;
}

.template-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.template-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.template-card h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.code-block {
    background: #0b1020;
    color: #e2e8f0;
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
    border: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.code-block code {
    font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    white-space: pre;
}

/* ==========================================
   适用性对比
   ========================================== */
.suitability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.75rem;
    margin: 2.5rem 0 3.5rem;
}

.suitability-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.suitability-card:hover {
    box-shadow: var(--shadow-lg);
}

.suitability-card h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.suitability-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.suitability-card ul li::before {
    content: "•";
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.use-card {
    border-left: 5px solid #10b981;
}

.skip-card {
    border-left: 5px solid #ef4444;
}

/* ==========================================
   输出对比
   ========================================== */
.comparison-split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.75rem;
    margin: 2.5rem 0 3.5rem;
}

.comparison-panel {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.comparison-panel:hover {
    box-shadow: var(--shadow-lg);
}

.comparison-panel ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-top: 1rem;
}

.comparison-panel ul li::before {
    content: "•";
    color: var(--text-muted);
    margin-right: 0.5rem;
}

.comparison-panel.highlighted {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-glow);
}

.comparison-badge {
    display: inline-flex;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    background: rgba(14, 165, 233, 0.12);
    color: var(--accent-color);
}

/* ==========================================
   资源网格 - 精致卡片
   ========================================== */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.resource-card {
    padding: 2rem;
    background: linear-gradient(135deg, #f8fafc, #eef2ff);
    border-radius: var(--radius-xl);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.resource-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.0625rem;
}

.resource-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
}

/* ==========================================
   Mirror 页面 UI（与首页风格统一）
   ========================================== */
.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 44px;
    height: 44px;
}

.mirror-page .mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.mirror-page .mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mirror-page .mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.mirror-page .mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mirror-page .mobile-menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mirror-page .mobile-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.mirror-page .mobile-link:hover,
.mirror-page .mobile-link.highlight {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.08);
}

.mirror-hero {
    text-align: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(102, 126, 234, 0.18), transparent 55%),
                radial-gradient(circle at 70% 60%, rgba(14, 165, 233, 0.15), transparent 55%);
}

.hero-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.6), transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-full);
    background: rgba(102, 126, 234, 0.12);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.title-gradient {
    background: linear-gradient(135deg, var(--text-primary) 0%, #4338ca 60%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.mirror-notice {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: 1.75rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-md);
    text-align: left;
}

.notice-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    border-radius: var(--radius-xl);
    color: #d97706;
}

.notice-content h3 {
    margin: 0 0 0.5rem;
    font-size: 1.125rem;
}

.notice-content p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

.section-services {
    padding: 100px 0;
    background: var(--bg-primary);
}

.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 3rem;
}

.section-badge {
    display: inline-flex;
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-full);
    background: rgba(14, 165, 233, 0.12);
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.section-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

.service-category {
    margin-bottom: 3.5rem;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.category-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    color: var(--primary-color);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-light);
}

.service-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    color: var(--primary-color);
}

.service-content h4 {
    margin: 0 0 0.5rem;
}

.service-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

.category-icon.gemini {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(56, 189, 248, 0.2));
    color: #0284c7;
}

.category-icon.claude {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(168, 85, 247, 0.2));
    color: #6366f1;
}

.category-icon.chatgpt {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(5, 150, 105, 0.2));
    color: #059669;
}

.category-icon.grok {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.18), rgba(249, 115, 22, 0.2));
    color: #d97706;
}

/* ==========================================
   服务保障区
   ========================================== */
.section-guarantee {
    background: var(--bg-secondary);
    padding: 100px 0;
}

.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.75rem;
    margin-top: 2.5rem;
}

.guarantee-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    padding: 2.25rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    text-align: left;
    transition: var(--transition);
}

.guarantee-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.guarantee-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    color: var(--primary-color);
    margin-bottom: 1.25rem;
}

.guarantee-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.guarantee-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* ==========================================
   使用指南区
   ========================================== */
.section-guide {
    background: var(--bg-primary);
    padding: 100px 0;
}

.guide-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2.5rem;
    align-items: center;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.guide-step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    transition: var(--transition);
}

.guide-step:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.step-marker {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    color: white;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-info h3 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}

.step-info p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

.guide-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    padding: 1.75rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    color: var(--primary-color);
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .mirror-page .mobile-menu-btn {
        display: flex;
    }

    .mirror-page .nav-menu {
        display: none;
    }

    .mirror-page .hero-actions {
        flex-direction: column;
    }

    .mirror-page .mirror-notice {
        flex-direction: column;
        text-align: left;
    }

    .guide-content {
        grid-template-columns: 1fr;
    }
}

.mirror-page .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mirror-page .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mirror-page .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.9);
}

/* ==========================================
   CTA区域 - 深色渐变
   ========================================== */
.cta-section {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e1b4b 50%, #312e81 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 70%, rgba(102, 126, 234, 0.15) 0%, transparent 50%);
}

.cta-section h2 {
    color: white;
    position: relative;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    font-size: 1.125rem;
    position: relative;
}

.cta-section .cta-button {
    animation: none;
}

/* ==========================================
   页脚 - 精致暗色
   ========================================== */
.footer {
    background: var(--bg-darker);
    color: white;
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3.5rem;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    width: 52px;
    height: 52px;
    margin-bottom: 1.25rem;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    color: var(--text-muted);
    line-height: 1.8;
    font-size: 0.9375rem;
}

.footer-links h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: 1.75rem;
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.875rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9375rem;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
        max-width: none;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 0.5rem;
        box-shadow: var(--shadow-xl);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .hero {
        padding: 140px 0 100px;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .content-grid,
    .features-grid,
    .use-cases-grid,
    .create-steps,
    .skills-types {
        grid-template-columns: 1fr;
    }
    
    .detailed-steps::before {
        display: none;
    }
    
    .detailed-step {
        padding-left: 1.75rem;
    }
    
    .step-badge {
        position: static;
        transform: none;
        margin-bottom: 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }
    
    .footer-brand {
        margin: 0 auto;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 320px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 1.25rem;
    }
    
    .content-card,
    .feature-card,
    .use-case-card,
    .create-step {
        padding: 1.75rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}

/* ==========================================
   无障碍优化
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 焦点样式 */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 3px;
}

/* 选择文本样式 */
::selection {
    background: var(--primary-light);
    color: white;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to bottom, var(--primary-dark), var(--primary-color));
}