/* Modern Professional Design System */
:root {
    /* Retro Color Palette */
    --retro-coral: #ff6b47;
    /* 复古珊瑚红 - 替代粉色 */
    --retro-sage: #8b9556;
    /* 复古鼠尾草绿 - 替代原绿色 */
    --retro-cream: #fdf6e3;
    /* 奶油色 */
    --retro-sand: #f4e4bc;
    /* 沙色 */
    --retro-terracotta: #d2691e;
    /* 赤陶色 */
    --retro-olive: #556b2f;
    /* 橄榄绿 */
    --retro-gold: #daa520;
    /* 复古金色 */
    --retro-brown: #8b4513;
    /* 复古棕色 */

    /* Primary Brand Colors - 保持你的原始主题色 */
    --primary-pink: #f784c5;
    --primary-green: #1b602f;

    /* Retro Neutral Palette - 保持现代中性色 */
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    /* Brand Accent Colors */
    --pink-50: #fdf2f8;
    --pink-500: #ec4899;
    --green-50: #f0fdf4;
    --green-500: #22c55e;
    --blue-50: #eff6ff;
    --blue-500: #3b82f6;

    /* Typography Scale */
    --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Crimson Text', Georgia, 'Times New Roman', serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, var(--retro-cream) 0%, var(--retro-sand) 30%, var(--primary-pink) 70%, var(--primary-green) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, rgba(247, 132, 197, 0.1) 0%, rgba(27, 96, 47, 0.1) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 3px solid var(--primary-pink);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(247, 132, 197, 0.3);
    padding: var(--space-3) 0;
}

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

.nav-brand {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.nav-brand-link {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-brand-link:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

.nav-brand .brave-pink {
    color: var(--primary-pink);
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(247, 132, 197, 0.3);
}

.nav-brand .hero-green {
    color: var(--primary-green);
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(27, 96, 47, 0.3);
}

/* Navigation Logo */
.nav-logo {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
    flex-shrink: 0;
}

.nav-brand-link:hover .nav-logo {
    transform: rotate(-5deg) scale(1.05);
    box-shadow: var(--shadow-md);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.color-codes {
    display: flex;
    gap: var(--space-4);
    align-items: center;
}

.color-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(255, 255, 255, 0.8);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.color-swatch {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.color-code {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
}

/* Color Code Page Styles */
.color-code-header {
    background: linear-gradient(135deg, var(--primary-pink) 0%, var(--primary-green) 100%);
    color: white;
    padding: var(--space-20) 0 var(--space-16);
    text-align: center;
    margin-top: 80px;
}

.color-code-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--space-6);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.color-code-subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

.color-showcase-section {
    padding: var(--space-20) 0;
    background: var(--gray-50);
}

.color-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-12);
    max-width: 1000px;
    margin: 0 auto;
}

.color-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
    border: 3px solid transparent;
    transition: var(--transition-normal);
}

.color-card.primary-pink {
    border-color: var(--primary-pink);
}

.color-card.primary-green {
    border-color: var(--primary-green);
}

.color-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.color-swatch-large {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 3px solid rgba(255, 255, 255, 0.8);
}

.color-info h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
    text-align: center;
}

.color-codes-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.color-code-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.code-label {
    font-weight: 600;
    color: var(--gray-600);
    min-width: 50px;
}

.code-value {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--gray-800);
    flex: 1;
    text-align: center;
}

.copy-btn {
    background: var(--primary-pink);
    color: white;
    border: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.copy-btn:hover {
    background: var(--primary-green);
    transform: translateY(-1px);
}

.copy-btn.copied {
    background: var(--green-500);
}

.palette-section {
    padding: var(--space-20) 0;
}

.palette-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--space-6);
    color: var(--gray-800);
}

.palette-section p {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: var(--space-12);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.palette-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.palette-row h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
    text-align: center;
}

.color-swatches {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-4);
}

.color-swatch-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.color-swatch-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.color-swatch-item .color-swatch {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.color-swatch-item span {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.usage-section {
    padding: var(--space-8) 0;
    background: var(--gray-50);
}

.usage-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--space-6);
    color: var(--gray-800);
}

.usage-section p {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-8);
}

.usage-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-lg);
}

.usage-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
    color: var(--gray-800);
}

.code-block {
    position: relative;
    background: var(--gray-900);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

.code-block code {
    color: #e2e8f0;
}

.copy-code-btn {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: var(--primary-pink);
    color: white;
    border: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.copy-code-btn:hover {
    background: var(--primary-green);
}

.copy-code-btn.copied {
    background: var(--green-500);
}

.software-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.software-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-pink);
    margin-bottom: var(--space-2);
}

.software-item p {
    color: var(--gray-600);
    line-height: 1.6;
}

.faq-section {
    padding: var(--space-4) 0;
}

.faq-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--space-6);
    color: var(--gray-800);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.faq-item {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-pink);
}

.faq-item h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    color: var(--gray-800);
}

.faq-item p {
    color: var(--gray-600);
    line-height: 1.6;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.nav-link:hover {
    background: var(--primary-pink);
    color: white;
}

.nav-link.active {
    background: var(--primary-green);
    color: white;
}

.content-card.color-code-cta {
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    color: white;
    text-align: center;
    padding: var(--space-8);
}

.content-card.color-code-cta h3 {
    color: white;
    margin-bottom: var(--space-4);
}

.content-card.color-code-cta p {
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--space-6);
}

.color-code-btn {
    display: inline-block;
    background: white;
    color: var(--primary-pink);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.color-code-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    color: var(--primary-green);
}
    gap: var(--space-6);
    list-style: none;
}

.nav-link {
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--gray-700);
    text-decoration: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-pink);
    background: var(--pink-50);
}

.nav-link.active {
    color: var(--primary-green);
    background: var(--green-50);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary-green);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--space-2);
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--gray-700);
    margin: 2px 0;
    transition: all var(--transition-fast);
    border-radius: 1px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
    background: var(--primary-pink);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    background: var(--primary-pink);
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(247, 132, 197, 0.2);
    margin-top: 60px;
    /* Space for fixed navbar */
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.header .container {
    padding-top: var(--space-10);
    padding-bottom: var(--space-10);
    text-align: center;
    position: relative;
}

/* CTA Button Styles */
.cta-container {
    margin-top: var(--space-8);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-5) var(--space-10);
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    color: var(--white);
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    margin: var(--space-2) 0;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.6);
}

.cta-button:active {
    transform: translateY(0);
}

.cta-text {
    font-family: var(--font-primary);
}

.cta-icon {
    font-size: 1.25rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-4);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
}

.brave-pink {
    color: var(--primary-pink);
}

.hero-green {
    color: var(--primary-green);
}

.tagline {
    font-family: var(--font-secondary);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--gray-700);
    max-width: 32rem;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(247, 132, 197, 0.2);
}

/* Main Content */
.main {
    padding: var(--space-20) 0;
    position: relative;
}


/* Upload Section */
.upload-section {
    margin-bottom: var(--space-16);
}

.upload-area {
    background: rgba(255, 255, 255, 0.95);
    border: 3px dashed rgba(247, 132, 197, 0.5);
    border-radius: var(--radius-2xl);
    padding: var(--space-20) var(--space-12);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 40px rgba(59, 35, 21, 0.1);
    margin: var(--space-8) 0;
}

.upload-area:hover {
    border-color: var(--primary-pink);
    background: var(--white);
    transform: translateY(-4px);
    box-shadow: 0 30px 60px rgba(255, 107, 71, 0.3);
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(247, 132, 197, 0.15), transparent);
    transition: left 0.6s ease;
}

.upload-area:hover::before {
    left: 100%;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: var(--space-6);
    opacity: 0.8;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 8px rgba(59, 35, 21, 0.2));
}

.upload-area h2 {
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.upload-area p {
    font-family: var(--font-secondary);
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    font-size: 1.125rem;
}

.upload-formats {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--gray-100);
    color: var(--gray-600);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

.privacy-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-top: var(--space-8);
    padding: var(--space-4) var(--space-6);
    background: var(--sage-50);
    border: 1px solid var(--retro-sage);
    border-radius: var(--radius-xl);
    font-family: var(--font-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--retro-olive);
}

.privacy-icon {
    font-size: 1.125rem;
}

/* Controls Section */
.controls-section {
    background: rgba(253, 246, 227, 0.95);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    margin-bottom: var(--space-16);
    box-shadow: 0 20px 40px rgba(59, 35, 21, 0.1);
    border: 1px solid rgba(255, 107, 71, 0.2);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.controls-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.controls-grid {
    display: grid;
    gap: var(--space-8);
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.control-group label {
    font-family: var(--font-primary);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Slider Styles */
.slider {
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--gray-200);
    outline: none;
    appearance: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-md);
}

.slider-value {
    font-family: var(--font-secondary);
    font-weight: 600;
    color: var(--primary-pink);
    font-size: 0.875rem;
}

/* Color Pickers */
.color-pickers {
    display: flex;
    gap: var(--space-4);
}

.color-input {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.color-input input[type="color"] {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.color-input input[type="color"]:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.color-input label {
    font-size: 0.75rem;
    color: var(--gray-600);
    text-transform: none;
    letter-spacing: normal;
}

/* Preset Buttons */
.preset-buttons {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.preset-btn {
    padding: var(--space-3) var(--space-5);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    background: var(--white);
    color: var(--gray-700);
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-btn:hover {
    border-color: var(--primary-pink);
    color: var(--primary-pink);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.preset-btn.active {
    border-color: var(--primary-green);
    background: var(--primary-green);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

/* Preview Section */
.preview-section {
    margin-bottom: var(--space-16);
}

.preview-section>* {
    animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preview-grid {
    display: grid;
    gap: var(--space-8);
    margin-bottom: var(--space-10);
}

.preview-item {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(247, 132, 197, 0.2);
    backdrop-filter: blur(20px);
    transition: all var(--transition-normal);
    position: relative;
}

.preview-item:hover {
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    transform: translateY(-8px) scale(1.02);
}

.preview-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(247, 132, 197, 0.08), rgba(27, 96, 47, 0.08));
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.preview-item:hover::after {
    opacity: 1;
}

.preview-item h3 {
    padding: var(--space-5) var(--space-6);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1rem;
    color: var(--gray-800);
    text-align: center;
}

.image-container {
    position: relative;
    padding: var(--space-6);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-50);
}

.image-container img,
.image-container canvas {
    max-width: 100%;
    max-height: 500px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    object-fit: contain;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Loading States */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    backdrop-filter: blur(4px);
    border-radius: var(--radius-2xl);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-pink);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Buttons */
.action-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border: none;
    border-radius: var(--radius-xl);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--primary-green);
    color: var(--white);
    box-shadow: 0 10px 25px rgba(27, 96, 47, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::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: left 0.6s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(27, 96, 47, 0.6);
    background: var(--retro-olive);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--gray-700);
    border: 1px solid rgba(247, 132, 197, 0.3);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    border-color: rgba(247, 132, 197, 0.5);
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

/* Gallery Section */
.gallery-section {
    margin: var(--space-24) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-header h2 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-3);
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-family: var(--font-secondary);
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.gallery-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(20px);
}

.gallery-wrapper {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.gallery-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
}

.gallery-slide.active {
    opacity: 1;
    transform: translateX(0);
}

.gallery-slide.prev {
    transform: translateX(-100%);
}

.gallery-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--white);
    padding: var(--space-12) var(--space-6) var(--space-6);
    text-align: center;
}

.slide-caption h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.slide-caption p {
    font-family: var(--font-secondary);
    font-size: 1rem;
    opacity: 0.9;
    max-width: 400px;
    margin: 0 auto;
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
    backdrop-filter: blur(10px);
}

.gallery-nav:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.gallery-nav span {
    font-size: 1.5rem;
    font-weight: bold;
}

.gallery-prev {
    left: var(--space-4);
}

.gallery-next {
    right: var(--space-4);
}

.gallery-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-6);
    background: rgba(0, 0, 0, 0.05);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--primary-pink);
    transform: scale(1.2);
}

.dot:hover {
    background: var(--primary-green);
    transform: scale(1.1);
}

/* Gallery Responsive */
@media (max-width: 768px) {
    .gallery-wrapper {
        height: 400px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .gallery-nav {
        width: 40px;
        height: 40px;
    }
    
    .gallery-nav span {
        font-size: 1.2rem;
    }
    
    .slide-caption {
        padding: var(--space-8) var(--space-4) var(--space-4);
    }
    
    .slide-caption h3 {
        font-size: 1.25rem;
    }
    
    .slide-caption p {
        font-size: 0.9rem;
    }
}

/* Feature Description Section */
.feature-description {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(253, 246, 227, 0.95));
    border-radius: var(--radius-2xl);
    padding: var(--space-12);
    margin: var(--space-12) 0;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(247, 132, 197, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-description::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
}

.feature-description h2 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    letter-spacing: -0.02em;
}

.feature-description h3 {
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: var(--space-8) 0 var(--space-5) 0;
    position: relative;
    padding-left: var(--space-6);
}

.feature-description h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    border-radius: 2px;
}

.feature-description p {
    font-family: var(--font-secondary);
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--gray-700);
    margin-bottom: var(--space-6);
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.feature-description ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-4);
    margin: var(--space-8) 0;
    padding: 0;
    list-style: none;
}

.feature-description li {
    background: rgba(255, 255, 255, 0.8);
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-700);
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--primary-pink);
    transition: all var(--transition-normal);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature-description li:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(247, 132, 197, 0.15);
    border-left-color: var(--primary-green);
}

.feature-description li strong {
    color: var(--gray-900);
    font-weight: 600;
}

/* SEO Content Section */
.seo-content-section {
    margin: var(--space-6) 0 var(--space-4) 0;
}

.seo-content {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(240, 253, 244, 0.95));
    border-radius: var(--radius-2xl);
    padding: var(--space-8) var(--space-12);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06), 0 5px 15px rgba(0, 0, 0, 0.04);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(27, 96, 47, 0.08);
    position: relative;
    overflow: hidden;
    max-width: 1100px;
    margin: 0 auto;
}

.seo-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-green), var(--primary-pink));
}

.seo-content h2 {
    font-family: var(--font-primary);
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    letter-spacing: -0.02em;
    line-height: 1.2;
    position: relative;
    padding-bottom: var(--space-4);
}

.seo-content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
    border-radius: 2px;
}

.seo-content h3 {
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: var(--space-8) 0 var(--space-4) 0;
}

.seo-content > p {
    font-family: var(--font-secondary);
    font-size: 1.25rem;
    line-height: 1.7;
    color: var(--gray-700);
    margin-bottom: var(--space-6);
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
    margin: var(--space-6) 0;
}

.content-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(253, 246, 227, 0.85));
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    border: 1px solid rgba(247, 132, 197, 0.15);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
}

.content-card:nth-child(odd) {
    background: linear-gradient(135deg, rgba(240, 253, 244, 0.95), rgba(255, 255, 255, 0.9));
    border-color: rgba(27, 96, 47, 0.12);
}

.content-card:nth-child(even) {
    background: linear-gradient(135deg, rgba(253, 242, 248, 0.95), rgba(255, 255, 255, 0.9));
    border-color: rgba(247, 132, 197, 0.12);
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.content-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
}

.content-card:nth-child(odd):hover {
    border-color: var(--primary-green);
    box-shadow: 0 25px 50px rgba(27, 96, 47, 0.12);
}

.content-card:nth-child(even):hover {
    border-color: var(--primary-pink);
    box-shadow: 0 25px 50px rgba(247, 132, 197, 0.12);
}

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

.content-card h3 {
    font-family: var(--font-primary);
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-4);
    line-height: 1.3;
    position: relative;
    padding-left: var(--space-3);
}

.content-card h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 2px;
    width: 3px;
    height: 20px;
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    border-radius: 2px;
}

.content-card p {
    font-family: var(--font-secondary);
    font-size: 1.075rem;
    line-height: 1.7;
    color: var(--gray-700);
    margin: 0;
}

.tutorial-steps {
    background: linear-gradient(135deg, rgba(240, 253, 244, 0.8), rgba(255, 255, 255, 0.95));
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    margin: var(--space-8) 0;
    counter-reset: step-counter;
    border: 1px solid rgba(27, 96, 47, 0.15);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
    list-style: none;
}

.tutorial-steps li {
    font-family: var(--font-secondary);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--gray-700);
    margin-bottom: var(--space-6);
    padding: var(--space-4) var(--space-6) var(--space-4) var(--space-12);
    position: relative;
    counter-increment: step-counter;
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-green);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all var(--transition-normal);
}

.tutorial-steps li:hover {
    transform: translateX(4px);
    border-left-color: var(--primary-pink);
    box-shadow: 0 4px 15px rgba(27, 96, 47, 0.1);
}

.tutorial-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: -14px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, var(--primary-green), var(--primary-pink));
    color: var(--white);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.benefits-section {
    background: linear-gradient(135deg, rgba(253, 242, 248, 0.8), rgba(240, 253, 244, 0.8));
    border-radius: var(--radius-2xl);
    padding: var(--space-12);
    margin: var(--space-12) 0;
    border: 1px solid rgba(247, 132, 197, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.benefits-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
}

.benefits-section h3 {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: var(--space-6);
}

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

.benefit-item {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(253, 246, 227, 0.9));
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-normal);
    border: 1px solid rgba(247, 132, 197, 0.1);
    position: relative;
    overflow: hidden;
}

.benefit-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.benefit-item:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 15px 35px rgba(247, 132, 197, 0.2);
    border-color: var(--primary-green);
}

.benefit-item:hover::before {
    transform: scaleX(1);
}

.benefit-item h4 {
    font-family: var(--font-primary);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-2);
}

.benefit-item p {
    font-family: var(--font-secondary);
    font-size: 0.975rem;
    color: var(--gray-600);
    margin: 0;
}

/* FAQ 特殊样式 */
.seo-content:has(.faq-grid) {
    background: linear-gradient(135deg, rgba(253, 242, 248, 0.95), rgba(240, 253, 244, 0.95));
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-6);
    margin: var(--space-10) 0;
}

.faq-grid .content-card {
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-grid .content-card h3 {
    color: var(--primary-pink);
    font-size: 1.1rem;
    margin-bottom: var(--space-3);
}

.faq-grid .content-card h3::before {
    background: var(--primary-pink);
}

.faq-grid .content-card:nth-child(odd) h3 {
    color: var(--primary-green);
}

.faq-grid .content-card:nth-child(odd) h3::before {
    background: var(--primary-green);
}

/* 添加视觉分隔符 */
.seo-content-section:not(:last-child)::after {
    content: '';
    display: block;
    width: 150px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-pink), transparent, var(--primary-green));
    margin: var(--space-16) auto;
    border-radius: 1px;
}

/* Mobile optimization */
@media (max-width: 640px) {
    .seo-content {
        padding: var(--space-8) var(--space-4);
        margin: var(--space-4);
        border-radius: var(--radius-xl);
    }
    
    .seo-content h2 {
        font-size: 1.75rem;
        margin-bottom: var(--space-6);
        line-height: 1.3;
    }
    
    .seo-content h2::after {
        width: 50px;
        height: 2px;
    }
    
    .seo-content > p {
        font-size: 1.1rem;
        margin-bottom: var(--space-8);
        text-align: left;
    }
    
    .content-grid, .faq-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        margin: var(--space-8) 0;
    }
    
    .content-card {
        padding: var(--space-6) var(--space-5);
        border-radius: var(--radius-xl);
    }
    
    .content-card h3 {
        font-size: 1.15rem;
        margin-bottom: var(--space-3);
    }
    
    .content-card p {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .seo-content-section:not(:last-child)::after {
        width: 100px;
        margin: var(--space-12) auto;
    }
}

/* Tablet optimization */
@media (min-width: 641px) and (max-width: 768px) {
    .seo-content {
        padding: var(--space-12) var(--space-8);
    }
    
    .seo-content h2 {
        font-size: 2.25rem;
        margin-bottom: var(--space-6);
    }
    
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
        gap: var(--space-5);
    }
    
    .content-card {
        padding: var(--space-8);
    }
}

/* Color explanation cards styling */
.color-explanation-grid {
    margin: var(--space-12) 0;
}

.color-card {
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Desktop optimization for color cards */
@media (min-width: 768px) {
    .color-explanation-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
        /* 移除max-width，让它占满容器宽度 */
    }
    
    .color-card {
        padding: var(--space-10);
        min-height: 200px;
    }
    
    .color-card h3 {
        font-size: 1.4rem;
        margin-bottom: var(--space-4);
    }
    
    .color-card p {
        font-size: 1.1rem;
        line-height: 1.7;
    }
}

/* Large screen optimization */
@media (min-width: 1200px) {
    .seo-content {
        max-width: 1200px;
        padding: var(--space-24) var(--space-20);
    }
    
    .content-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-10);
    }
    
    .color-explanation-grid {
        gap: var(--space-10);
        /* 移除max-width，让它占满容器宽度 */
    }
    
    .color-card {
        padding: var(--space-12);
        min-height: 200px;
    }
    
    .color-card h3 {
        font-size: 1.5rem;
        margin-bottom: var(--space-5);
    }
    
    .color-card p {
        font-size: 1.125rem;
        line-height: 1.8;
    }
    
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-8);
    }
}

/* Footer */
.footer {
    background: linear-gradient(135deg, rgba(24, 24, 27, 0.98), rgba(9, 9, 11, 0.98));
    color: var(--gray-300);
    padding: var(--space-24) 0 var(--space-12);
    margin-top: var(--space-24);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(247, 132, 197, 0.15);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green), var(--primary-pink));
    opacity: 0.8;
}

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

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

/* Footer Brand Section */
.footer-brand-section {
    display: flex;
    flex-direction: column;
}

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.footer-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    filter: brightness(1.1);
    flex-shrink: 0;
}

.footer-logo:hover {
    transform: scale(1.05) rotate(3deg);
    filter: brightness(1.3);
    box-shadow: 0 8px 24px rgba(247, 132, 197, 0.4);
}

.brand-text h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 0 var(--space-2) 0;
    line-height: 1.2;
}

.brand-text p {
    font-family: var(--font-secondary);
    color: var(--gray-400);
    margin: 0;
    font-size: 1rem;
    line-height: 1.5;
}

/* Footer Navigation */
.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.footer-section h4 {
    font-family: var(--font-primary);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-200);
    margin: 0 0 var(--space-4) 0;
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-pink), var(--primary-green));
    border-radius: 1px;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section li {
    margin-bottom: var(--space-3);
}

.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    font-family: var(--font-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
    padding: var(--space-1) 0;
    position: relative;
}

.footer-section a:hover {
    color: var(--primary-pink);
    transform: translateX(4px);
}

.footer-section a::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-pink);
    transition: width 0.3s ease;
}

.footer-section a:hover::before {
    width: 8px;
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom-left p {
    font-family: var(--font-secondary);
    color: var(--gray-500);
    margin: 0;
    font-size: 0.875rem;
}

.footer-badge {
    display: flex;
    align-items: center;
}

.footer-badge a {
    transition: all 0.3s ease;
    display: block;
}

.footer-badge a:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.footer-badges {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.footer-badge-link {
    transition: all 0.3s ease;
    display: block;
}

.footer-badge-link:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.footer-badge-link img {
    height: auto;
    max-height: 40px;
}

/* Privacy Policy Styles */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-8) 0;
}

.privacy-intro {
    background: linear-gradient(135deg, rgba(247, 132, 197, 0.1), rgba(27, 96, 47, 0.1));
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-8);
    border: 1px solid rgba(247, 132, 197, 0.2);
}

.privacy-date {
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.privacy-summary {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0;
}

.privacy-section {
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border-light);
}

.privacy-section:last-child {
    border-bottom: none;
}

.privacy-section h2 {
    color: var(--primary-green);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.privacy-section h3 {
    color: var(--primary-pink);
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: var(--space-5);
    margin-bottom: var(--space-3);
}

.privacy-section p {
    line-height: 1.7;
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

.privacy-section ul {
    margin-left: var(--space-5);
    margin-bottom: var(--space-4);
}

.privacy-section li {
    margin-bottom: var(--space-2);
    line-height: 1.6;
    color: var(--text-secondary);
}

.privacy-section strong {
    color: var(--text-primary);
    font-weight: 600;
}

.privacy-section a {
    color: var(--primary-pink);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
}

.privacy-section a:hover {
    color: var(--primary-green);
    text-decoration: underline;
}

.privacy-highlight {
    background: linear-gradient(135deg, rgba(27, 96, 47, 0.1), rgba(247, 132, 197, 0.1));
    padding: var(--space-5);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-pink);
    margin-top: var(--space-5);
}

.privacy-highlight h3 {
    color: var(--primary-green) !important;
    margin-top: 0 !important;
}

.privacy-highlight p {
    margin-bottom: 0;
    font-weight: 500;
    color: var(--text-primary) !important;
}

@media (max-width: 768px) {
    .privacy-content {
        padding: var(--space-6) 0;
    }
    
    .privacy-intro {
        padding: var(--space-4);
    }
    
    .privacy-section h2 {
        font-size: 1.3rem;
    }
    
    .privacy-section ul {
        margin-left: var(--space-4);
    }
}

/* Footer Button Styles */
.footer-link-btn {
    color: var(--gray-400) !important;
    text-decoration: none;
    font-family: var(--font-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
    padding: var(--space-1) 0;
    border: none;
    background: transparent !important;
    position: relative;
    cursor: pointer;
    pointer-events: auto;
    outline: none;
    min-width: auto;
}

.footer-link-btn:hover {
    color: var(--primary-pink) !important;
    transform: translateX(4px);
}

.footer-link-btn::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-pink);
    transition: width 0.3s ease;
}

.footer-link-btn:hover::before {
    width: 8px;
}

/* Responsive Footer Styles */
@media (max-width: 1024px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .footer-nav {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-6);
    }
    
    .footer-brand {
        justify-content: center;
        text-align: center;
    }
    
    .brand-text {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .footer {
        padding: var(--space-16) 0 var(--space-8);
    }
    
    .footer-main {
        gap: var(--space-8);
    }
    
    .footer-nav {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        text-align: center;
    }
    
    .footer-section h4 {
        font-size: 1rem;
    }
    
    .footer-section h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-section a::before,
    .footer-link-btn::before {
        display: none;
    }
    
    .footer-section a:hover,
    .footer-link-btn:hover {
        transform: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--space-4);
    }
    
    .footer-brand {
        flex-direction: column;
        align-items: center;
        gap: var(--space-3);
    }
    
    .brand-text h3 {
        font-size: 1.25rem;
    }
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--space-12);
        transition: left var(--transition-normal);
        border-right: 1px solid rgba(247, 132, 197, 0.2);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        font-size: 1.1rem;
        padding: var(--space-4) var(--space-6);
        margin: var(--space-2) 0;
        width: 200px;
        text-align: center;
        border-radius: var(--radius-xl);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-brand {
        font-size: 1rem;
    }

    .header {
        margin-top: 60px;
    }
    
}

/* Responsive Design */
@media (min-width: 640px) {
    .container {
        padding: 0 var(--space-8);
    }

    .logo {
        font-size: 3rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    .upload-area {
        padding: var(--space-20) var(--space-12);
    }
}

@media (min-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr 1fr;
    }

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

@media (min-width: 1024px) {
    .main {
        padding: var(--space-24) 0;
    }

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

    .upload-area {
        padding: var(--space-24) var(--space-16);
    }
}

/* Focus States */
button:focus,
input:focus,
.upload-area:focus {
    outline: 2px solid var(--primary-pink);
    outline-offset: 2px;
}

/* Animation Utilities */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* SEO Content Animations */
.seo-content-section {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.seo-content-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.content-card {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease-out;
}

.content-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.content-card:nth-child(1) { transition-delay: 0.1s; }
.content-card:nth-child(2) { transition-delay: 0.2s; }
.content-card:nth-child(3) { transition-delay: 0.3s; }
.content-card:nth-child(4) { transition-delay: 0.4s; }
.content-card:nth-child(5) { transition-delay: 0.5s; }
.content-card:nth-child(6) { transition-delay: 0.6s; }

/* 文字突出效果 */
.content-card p strong {
    background: linear-gradient(135deg, var(--primary-pink), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    position: relative;
}

/* 添加光效动画 */
.content-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
    pointer-events: none;
}

.content-card:hover::after {
    left: 100%;
}


/* Accessibility */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {

    .header,
    .footer,
    .controls-section,
    .action-buttons {
        display: none;
    }

    .preview-section {
        break-inside: avoid;
    }
}