/* ============================================
   Cardnera - SEO Optimized Styles
   ============================================ */

/* CSS Variables */
:root {
    --primary-color: #1e3a8a;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --accent-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #f9fafb;
    --border-color: #e5e7eb;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

@media (max-width: 750px) {
    .container {
        padding: 0 1rem;
    }
}

/* Header and Navigation */
.header {
    background-color: var(--secondary-color);
    color: var(--text-light);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.navbar {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    flex-shrink: 0;
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
    display: flex;
    align-items: center;
}

.logo:hover {
    color: var(--primary-light);
    text-decoration: none;
}

.logo-text {
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.menu-icon {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-light);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-icon {
    font-size: 1.2rem;
    display: inline-block;
}

@media (min-width: 769px) {
    .nav-icon {
        display: none;
    }
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-light);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        background-color: var(--secondary-color);
        width: 80%;
        height: 100vh;
        transition: right 0.3s ease;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .mobile-menu-btn.active .menu-icon:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .mobile-menu-btn.active .menu-icon:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active .menu-icon:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    color: var(--text-light);
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.app-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.app-button {
    display: inline-block;
    transition: var(--transition);
    transform: translateY(0);
}

.app-button:hover {
    transform: translateY(-4px);
}

.app-store-image,
.google-play-image {
    height: 108px;
    width: auto;
}

@media (max-width: 768px) {
    .hero {
        padding: 4rem 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .app-buttons {
        gap: 1rem;
    }

    .app-store-image,
    .google-play-image {
        height: 40px;
    }
}

/* Section Styles */
section {
    padding: 4rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.25rem;
}

/* How It Works Section */
.how-it-works {
    background-color: var(--bg-light);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.step-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

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

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
    color: var(--text-light);
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

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

/* App Screenshots Section */
.app-screenshots {
    background-color: var(--bg-white);
}

.demo-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    font-style: italic;
}

.carousel {
    position: relative;
    background-color: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    padding: 0rem !important;

}

.carousel-container {
    display: flex;
    transition: transform 0.5s ease;
    gap: 0rem;
   margin:0rem;
   padding:0rem;
    width: 100%;         /* 必须给轮播图一个固定宽度，否则会塌陷 */

}

.carousel-slide {
    flex: 0 0 100%;
    text-align: center;
    width: 100%;         /* 必须给轮播图一个固定宽度，否则会塌陷 */

}

.carousel-slide img {
    /* 取消自动拉伸 */
    width: 100%;
    border-radius: 12px;
    /* 确保大图不会超出幻灯片边界（安全保障） */
    max-width: 100%;
    max-height: 100%;
    border-radius: 12px;
    
    /* 配合父级 text-align: center 实现水平居中 */
    
    /* 如果需要垂直居中，可以给 .carousel-slide 加上 display: flex */
}

.screenshot-img {
    max-width: 300px;
    height: auto;
    border-radius: 0px;
    box-shadow: var(--shadow-md);
    margin: 0 auto;
    display: block;
}

.screenshot-caption {
    margin-top: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.carousel-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    padding: 0 1rem;
    pointer-events: none;
}

.carousel-btn {
    background-color: rgba(30, 58, 138, 0.8);
    color: var(--text-light);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    z-index: 10;
}

.carousel-btn:hover {
    background-color: var(--primary-dark);
    transform: scale(1.1);
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .carousel {
        padding: 1rem;
    }

    .screenshot-img {
        max-width: 250px;
    }
}

/* About Section */
.about {
    background-color: var(--bg-light);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Corporate Information Section */
.corporate-info {
    background-color: var(--bg-white);
}

.info-table-wrapper {
    overflow-x: auto;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-md);
    border-radius: 8px;
    overflow: hidden;
}

.info-table th,
.info-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.info-table th {
    background-color: var(--primary-color);
    color: var(--text-light);
    font-weight: 600;
    width: 25%;
}

.info-table tr:last-child th,
.info-table tr:last-child td {
    border-bottom: none;
}

.info-table tr:hover {
    background-color: var(--bg-light);
}

@media (max-width: 768px) {
    .info-table th,
    .info-table td {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

/* Company Overview Section */
.company-overview {
    background-color: var(--bg-white);
}

.overview-content {
    max-width: 900px;
    margin: 0 auto;
}

.overview-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Company Image Section */
.company-image {
    background-color: var(--bg-light);
}

.office-figure {
    text-align: center;
    margin: 0;
}

.office-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.office-caption,
.review-caption,
.cert-caption {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.95rem;
}

/* Company Address Section */
.company-address {
    background-color: var(--bg-white);
}

.address-block {
    max-width: 800px;
    margin: 0 auto;
    font-style: normal;
    line-height: 1.8;
}

.address-block p {
    margin-bottom: 1rem;
}

/* App Reviews Section */
.app-reviews {
    background-color: var(--bg-light);
}

.reviews-content {
    max-width: 900px;
    margin: 0 auto;
}

.review-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    text-align: center;
}

.review-image {
    text-align: center;
    margin: 0;
}

.reviews-img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

/* Core Values Section */
.core-values {
    background-color: var(--bg-white);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.value-card {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    padding: 2rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.value-title {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.value-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Why Choose Section */
.why-choose {
    background-color: var(--bg-light);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.benefit-title {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.benefit-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Copyright Certificate Section */
.copyright-cert {
    background-color: var(--bg-white);
}

.cert-figure {
    text-align: center;
    margin: 0;
}

.cert-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

/* Contact Section */
.contact {
    background-color: var(--bg-light);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-address {
    font-style: normal;
    line-height: 1.8;
    color: var(--text-secondary);
}

.contact-address p {
    margin-bottom: 1rem;
}

.contact-address a {
    color: var(--primary-color);
    font-weight: 600;
}

/* Breadcrumb Navigation */
.breadcrumb {
    background-color: var(--bg-light);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    margin: 0 0.5rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--primary-color);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Company Hero Section */
.company-hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    padding: 4rem 0;
}

.company-hero .hero-title {
    font-size: 2.5rem;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: var(--text-light);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.footer-title {
    font-size: 1.25rem;
}

.footer-subtitle {
    font-size: 1rem;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin: 0;
}

.footer-legal {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-legal a:hover {
    color: var(--primary-light);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    section {
        padding: 2rem 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .nav-menu {
        gap: 0.5rem;
        font-size: 0.8rem;
    }

    .app-buttons {
        flex-direction: column;
        align-items: center;
    }

    .steps-grid,
    .values-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .carousel {
        padding: 1rem 0.5rem;
    }

    .carousel-btn {
        width: 35px;
        height: 35px;
        font-size: 1.2rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles for Keyboard Navigation */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .carousel-controls {
        display: none;
    }

    body {
        color: #000;
        background-color: #fff;
    }

    a {
        text-decoration: underline;
    }
}