/* SV67 - Swiss Modern Design System */

:root {
    /* 核心色彩 - 瑞士现代主义 */
    --primary-navy: #002147;
    --secondary-gray: #f5f5f5;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --white: #ffffff;
    --accent-blue: #0056b3;
    --border-light: #e0e0e0;

    /* 间距系统 - 严格的网格 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    /* 字体系统 */
    --font-primary: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-xxl: 3rem;

    /* 布局 */
    --max-width: 1200px;
    --grid-columns: 12;
}

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

/* 图片通用最大宽度，防止溢出 */
img, picture, video, canvas {
    max-width: 100%;
    height: auto;
    display: block;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    font-weight: 400;
}

/* 容器 */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 网格系统 */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* 导航栏 */
.navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}


/* Logo image sizing */
.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary-navy);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-navy);
}

/* Hero区域 - 叠加模式 */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-color: var(--primary-navy);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-navy) 0%, #003d7a 100%);
    opacity: 0.95;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    padding: var(--spacing-xxl) 0;
}

.hero h1 {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.hero-description {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    opacity: 0.95;
}

.slogan {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

/* Hero左右布局 */
.hero-left-right {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

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

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: var(--font-size-sm);
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-navy);
}

.btn-primary:hover {
    background-color: var(--secondary-gray);
    transform: translateY(-2px);
}

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

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

/* 按钮组 */
.btn-group {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

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

/* 内容块 - 左右结构 */
.content-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    padding: var(--spacing-xl) 0;
}

.content-block.reverse {
    direction: rtl;
}

.content-block.reverse > * {
    direction: ltr;
}

.content-block-text {
    padding: var(--spacing-md);
}

.content-block h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-navy);
    font-weight: 700;
}

.content-block p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.content-block-image {
    position: relative;
    overflow: hidden;
    background-color: var(--secondary-gray);
    aspect-ratio: 16/10;
}

.content-block-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 内容块 - 上下结构 */
.content-block-vertical {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.content-block-vertical .content-block-image {
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.content-block-vertical h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--primary-navy);
    font-weight: 700;
}

.content-block-vertical p {
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
    color: var(--text-light);
    line-height: 1.8;
}

/* 内容网格 */
.content-grid {
    padding: var(--spacing-xl) 0;
}

.content-grid h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--primary-navy);
}

.grid-items {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-item {
    background-color: var(--white);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.grid-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.grid-item-image {
    aspect-ratio: 16/10;
    background-color: var(--secondary-gray);
    overflow: hidden;
}

.grid-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.grid-item-content {
    padding: var(--spacing-md);
}

.grid-item h3 {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-navy);
    font-weight: 600;
}

.grid-item p {
    color: var(--text-light);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

/* 特性区域 */
.features {
    background-color: var(--secondary-gray);
    padding: var(--spacing-xxl) 0;
}

.feature-card {
    background-color: var(--white);
    padding: var(--spacing-lg);
    text-align: center;
    height: 100%;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background-color: var(--primary-navy);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-lg);
}

.feature-card h3 {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-navy);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 统计数据 */
.stats {
    padding: var(--spacing-xl) 0;
    background-color: var(--primary-navy);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-item h3 {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-item p {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* 页脚 */
.footer {
    background-color: var(--text-dark);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-column h3 {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

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

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-column a:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    color: rgba(255,255,255,0.6);
    font-size: var(--font-size-xs);
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 基础布局调整 */
    body {
        overflow-x: hidden;
    }

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

    .content-block {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: var(--spacing-md) 0;
    }

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

    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    /* 文字大小调整 */
    h1 {
        font-size: var(--font-size-xl) !important;
    }

    h2 {
        font-size: var(--font-size-lg) !important;
        margin-bottom: var(--spacing-sm);
    }

    h3 {
        font-size: var(--font-size-md) !important;
    }

    p {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
}

/* 移动菜单 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 5px 0;
    transition: 0.3s;
}

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

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        padding: var(--spacing-md);
    }

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

/* 实用类 */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.py-xl {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

/* Affiliate Disclosure Styles */
.affiliate-disclosure {
    background: #fff3cd;
    border-top: 2px solid #ffc107;
    padding: 8px 0;
    margin-bottom: 0;
    font-size: 12px;
    line-height: 1.4;
}

.affiliate-disclosure p {
    margin: 0;
    color: #856404;
}

/* Age Warning Styles */
.age-warning {
    background: linear-gradient(135deg, #ff4444, #ff6b6b);
    color: white;
    padding: 10px 0;
    position: sticky;
    top: 60px;
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.warning-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.age-badge {
    background: white;
    color: #ff4444;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 14px;
}

.age-warning p {
    margin: 0;
    flex: 1;
    font-size: 12px;
}

.responsible-link {
    color: white;
    text-decoration: underline;
    font-weight: 500;
}

.responsible-link:hover {
    color: #ffe4e4;
}

/* Comparison Table Styles */
.comparison-table {
    margin: 2rem 0;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.comparison-table th {
    background: linear-gradient(45deg, #1a1a1a, #333);
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    font-size: 1rem;
}

.comparison-table th.highlight {
    background: linear-gradient(45deg, #c9b037, #fcf404);
    color: #1a1a1a;
    position: relative;
}

.comparison-table th.highlight::after {
    content: "👑";
    position: absolute;
    top: -8px;
    right: 10px;
    font-size: 1.2rem;
}

.comparison-table td {
    padding: 0.875rem 1rem;
    text-align: center;
    border-bottom: 1px solid #eee;
    font-size: 0.95rem;
}

.comparison-table td.highlight {
    background: linear-gradient(45deg, rgba(201,176,55,0.1), rgba(252,244,4,0.1));
    font-weight: 600;
    color: #c9b037;
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: 500;
}

@media (max-width: 768px) {
    .comparison-table {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.5rem;
    }
}

/* Stats Section Enhanced */
.stats .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stats .stat-item {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, #1a1a1a 0%, #333 100%);
    border-radius: 16px;
    color: white;
    position: relative;
    overflow: hidden;
}

.stats .stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #c9b037, #fcf404, #c9b037);
}

.stats .stat-item h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    background: linear-gradient(45deg, #c9b037, #fcf404);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats .stat-item p {
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0 0 0.25rem 0;
    color: #fff;
}

.stats .stat-note {
    font-size: 0.8rem;
    color: #ccc;
    font-style: italic;
}

/* Testimonials Styles */
.testimonials .grid-item {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid #c9b037;
}

.testimonials .grid-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}

.testimonials .grid-item-image img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #c9b037;
    margin: 0 auto 1rem auto;
    display: block;
}

.testimonials .rating {
    color: #fcf404;
    font-size: 1.2rem;
    text-align: center;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.testimonials .grid-item-content p {
    font-style: italic;
    line-height: 1.6;
    color: #555;
    margin-bottom: 1.5rem;
    text-align: center;
}

.testimonials .testimonial-author {
    text-align: center;
    border-top: 1px solid #eee;
    padding-top: 1rem;
}

.testimonials .testimonial-author strong {
    display: block;
    color: #1a1a1a;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.testimonials .testimonial-author span {
    color: #666;
    font-size: 0.9rem;
}

/* Content Meta Styles */
.content-meta {
    background: #f8f9fa;
    padding: 15px 0;
    border-bottom: 1px solid #dee2e6;
    margin-bottom: 30px;
}

.meta-info {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    font-size: 14px;
    color: #6c757d;
}

.meta-info span {
    color: #495057;
    font-weight: 500;
}

.meta-info a {
    color: #007bff;
    text-decoration: none;
}

.meta-info a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .warning-content {
        text-align: center;
        justify-content: center;
        gap: 8px;
    }

    .meta-info {
        flex-direction: column;
        gap: 10px;
    }

    /* 移动端头部优化 */
    .navbar-inner {
        padding: var(--spacing-sm) 0;
    }

    .affiliate-disclosure {
        padding: 6px 0;
        font-size: 11px;
    }

    .age-warning {
        padding: 8px 0;
    }

    .age-badge {
        padding: 2px 8px;
        font-size: 12px;
    }

    .age-warning p {
        font-size: 11px;
    }

    .responsible-link {
        font-size: 11px;
    }

    /* 容器在移动端的padding调整 */
    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Logo sizing on mobile */
    .logo img {
        height: 32px;
    }

    /* Hero区域移动端优化 */
    .hero {
        min-height: 400px;
    }

    .hero-left-right {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }

    .hero-content {
        padding: var(--spacing-lg) 0;
        order: 1;
    }

    .hero-image {
        order: 2;
        margin-bottom: var(--spacing-md);
    }

    .hero h1 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }

    .slogan {
        font-size: var(--font-size-md);
        margin-bottom: var(--spacing-sm);
    }

    .hero-description {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-md);
    }

    /* 按钮组在移动端的优化 */
    .btn-group {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
}