/* PhotoBus Web Style - Vercel-inspired Minimal Design */

:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #fafafa;
    --color-bg-tertiary: #f5f5f5;
    --color-text: #000000;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;
    --color-accent: #0070f3;
    --color-accent-hover: #0060d3;
    --gradient-text: linear-gradient(135deg, #000000 0%, #333333 100%);
    --gradient-accent: linear-gradient(135deg, #0070f3 0%, #00c6ff 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.2s ease;
    --max-width: 1200px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
}

.navbar .container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo img {
    height: 28px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    padding: 160px 0 120px;
    text-align: center;
}

.hero h1 {
    font-size: 64px;
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--color-text);
}

.hero p {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-bg);
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-text);
}

.btn i {
    font-size: 16px;
}

/* Section Styles */
.section {
    padding: 120px 0;
}

.section-title {
    text-align: center;
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 64px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features {
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--color-bg);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-text);
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

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

.screenshots-container {
    display: flex;
    flex-direction: column;
    gap: 64px;
}

.screenshot-group {
    width: 100%;
}

.screenshot-group h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
}

/* App Screenshots Grid - Horizontal Scroll */
.app-screenshots-grid {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding: 8px 4px 16px 4px;
    margin: 0 -4px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.app-screenshots-grid::-webkit-scrollbar {
    height: 6px;
}

.app-screenshots-grid::-webkit-scrollbar-track {
    background: transparent;
}

.app-screenshots-grid::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.app-screenshots-grid .screenshot-item {
    flex: 0 0 auto;
    width: 180px;
    aspect-ratio: 9/19.5;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
    scroll-snap-align: start;
}

.app-screenshots-grid .screenshot-item:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

/* PC Screenshots Grid - Horizontal Scroll */
.pc-screenshots-grid {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding: 8px 4px 16px 4px;
    margin: 0 -4px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.pc-screenshots-grid::-webkit-scrollbar {
    height: 6px;
}

.pc-screenshots-grid::-webkit-scrollbar-track {
    background: transparent;
}

.pc-screenshots-grid::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.pc-screenshots-grid .screenshot-item {
    flex: 0 0 auto;
    width: 480px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
    aspect-ratio: 16/10;
    scroll-snap-align: start;
}

.pc-screenshots-grid .screenshot-item:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

/* Testimonials Section */
.testimonials {
    background: var(--color-bg-secondary);
    padding: 100px 0;
}

.testimonials-placeholder {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-text-tertiary);
    font-size: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

/* Download Section */
.download-section {
    padding: 120px 0;
    text-align: center;
    background: var(--color-bg-secondary);
}

.download-section h2 {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.download-section p {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
}

.download-section .hero-buttons {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border-light);
    padding: 64px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--color-text);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-tertiary);
    font-size: 14px;
}

.footer-beian {
    display: none;
    margin-top: 8px;
}

.footer-beian a {
    color: var(--color-text-tertiary);
    text-decoration: none;
}

.footer-beian a:hover {
    text-decoration: underline;
}

html:lang(zh) .footer-beian,
html:lang(zh-TW) .footer-beian {
    display: block;
}

/* Language Switcher */
.lang-switcher {
    padding: 8px 12px;
    padding-right: 28px;
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    background: var(--color-bg);
    font-size: 13px;
    cursor: pointer;
    outline: none;
    transition: var(--transition);
    color: var(--color-text-secondary);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%23666' d='M5 7L1 3h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

.lang-switcher:hover {
    border-color: var(--color-border);
}

.lang-switcher:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(0, 112, 243, 0.1);
}

/* Privacy & Terms Pages */
.page-header {
    padding: 140px 0 60px;
    text-align: center;
    border-bottom: 1px solid var(--color-border-light);
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.page-header p {
    color: var(--color-text-secondary);
    font-size: 18px;
}

.page-content {
    padding: 80px 0;
    max-width: 720px;
    margin: 0 auto;
}

.page-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 48px 0 16px;
}

.page-content h2:first-child {
    margin-top: 0;
}

.page-content p {
    margin-bottom: 16px;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.page-content ul {
    margin-bottom: 20px;
    padding-left: 24px;
}

.page-content ul li {
    list-style: disc;
    margin-bottom: 12px;
    line-height: 1.8;
    color: var(--color-text-secondary);
}

.page-content strong {
    color: var(--color-text);
}

/* Force images to display */
img[data-i18n-loaded="true"] {
    display: block !important;
}

/* Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pc-screenshots-grid .screenshot-item {
        width: 400px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .navbar {
        height: 56px;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero h1 {
        font-size: 40px;
        letter-spacing: -1px;
    }

    .hero p {
        font-size: 17px;
        margin-bottom: 36px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 8px;
        margin-bottom: 60px;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 16px;
        margin-bottom: 48px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-card {
        padding: 24px 20px;
    }

    .app-screenshots-grid .screenshot-item {
        width: 140px;
    }

    .pc-screenshots-grid .screenshot-item {
        width: 300px;
    }

    .nav-links {
        display: none;
    }

    .download-section h2 {
        font-size: 32px;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .page-header h1 {
        font-size: 36px;
    }

    .page-content {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .app-screenshots-grid .screenshot-item {
        width: 120px;
    }

    .pc-screenshots-grid .screenshot-item {
        width: 260px;
    }

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