/* ===== eufy AI Cleaner - 亮色主题 ===== */
/* 配色方案：专业商务风 + 铜色点缀 + 鼠尾草绿 */

:root {
    /* 主色调 - 亮色 */
    --bg-primary: #fafaf8;
    --bg-secondary: #f5f3ef;
    --bg-card: #ffffff;
    --bg-card-hover: #fafaf8;

    /* 强调色 */
    --accent-copper: #b8860b;
    --accent-copper-light: #d4a843;
    --accent-sage: #4a7c59;
    --accent-sage-light: #6b9e7a;

    /* 文字色 */
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #8a8a8a;

    /* 功能色 */
    --success: #2e7d32;
    --warning: #f57c00;
    --error: #c62828;
    --info: #1565c0;

    /* 边框 */
    --border-light: #e8e6e1;
    --border-medium: #d4d2cd;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* 阴影 */
    --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);
}

/* ===== 重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    padding: 0 2rem;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(250, 250, 248, 0.98);
    box-shadow: var(--shadow-sm);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-copper), var(--accent-sage));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-logo-icon svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.nav-logo-text {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-copper);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-copper);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--accent-copper);
}

.nav-links a.active::after {
    width: 100%;
}

/* ===== 移动端菜单 ===== */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ===== Hero区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 2rem 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(184, 134, 11, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(74, 124, 89, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-text .subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-text .tagline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(184, 134, 11, 0.1);
    border: 1px solid rgba(184, 134, 11, 0.2);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--accent-copper);
    margin-bottom: 2rem;
}

.hero-visual {
    position: relative;
}

.hero-image {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: transform 0.5s ease;
}

.hero-image:hover {
    transform: scale(1.02);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-copper), var(--accent-copper-light));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(184, 134, 11, 0.3);
}

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

.btn-secondary:hover {
    background: rgba(184, 134, 11, 0.1);
    transform: translateY(-2px);
}

.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ===== 卡片 ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(184, 134, 11, 0.3);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(184, 134, 11, 0.1), rgba(74, 124, 89, 0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.card-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--accent-copper);
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== Section ===== */
.section {
    padding: var(--spacing-2xl) 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== 网格布局 ===== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

/* ===== 数据卡片 ===== */
.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-copper);
    margin-bottom: var(--spacing-xs);
}

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

/* ===== 流程步骤 ===== */
.steps {
    display: flex;
    gap: var(--spacing-lg);
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 60px;
    right: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-copper), var(--accent-sage));
    z-index: 0;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--bg-card);
    border: 3px solid var(--accent-copper);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-copper);
    margin: 0 auto var(--spacing-md);
    transition: all 0.3s ease;
}

.step:hover .step-number {
    background: var(--accent-copper);
    color: white;
    transform: scale(1.1);
}

.step h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.step p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== 表格 ===== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
}

th {
    background: rgba(184, 134, 11, 0.08);
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    color: var(--accent-copper);
    font-size: 0.95rem;
}

td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

tr:hover td {
    background: rgba(184, 134, 11, 0.03);
}

tr:last-child td {
    border-bottom: none;
}

/* ===== 标签 ===== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
}

.tag-copper {
    background: rgba(184, 134, 11, 0.1);
    color: var(--accent-copper);
    border: 1px solid rgba(184, 134, 11, 0.2);
}

.tag-sage {
    background: rgba(74, 124, 89, 0.1);
    color: var(--accent-sage);
    border: 1px solid rgba(74, 124, 89, 0.2);
}

.tag-success {
    background: rgba(46, 125, 50, 0.1);
    color: var(--success);
    border: 1px solid rgba(46, 125, 50, 0.2);
}

/* ===== 评分星星 ===== */
.stars {
    color: var(--warning);
    letter-spacing: 2px;
}

/* ===== 进度条 ===== */
.progress-bar {
    height: 8px;
    background: var(--border-light);
    border-radius: 100px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-fill {
    height: 100%;
    border-radius: 100px;
    background: linear-gradient(90deg, var(--accent-copper), var(--accent-sage));
    transition: width 1s ease;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-2xl) 2rem var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-2xl);
}

.footer h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer p,
.footer a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    text-decoration: none;
}

.footer a:hover {
    color: var(--accent-copper);
}

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

.footer-links li {
    margin-bottom: 8px;
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--spacing-lg) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .btn-group {
        justify-content: center;
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 1rem 2rem;
        border-bottom: 1px solid var(--border-light);
    }

    .nav-links.active {
        display: flex;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text .subtitle {
        font-size: 1.1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .steps {
        flex-direction: column;
    }

    .steps::before {
        display: none;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}