/* 基础变量 */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 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;
}

/* 页面加载进度条 */
.loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 9999;
    transition: width 0.3s ease;
}

.loading-bar.complete {
    width: 100%;
    opacity: 0;
    transition: width 0.3s ease, opacity 0.5s ease 0.3s;
}

/* 滚动进度指示器 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 9998;
    transition: width 0.1s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* 主页横幅 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.hero-brand-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
    opacity: 0.9;
    letter-spacing: 0.1em;
    font-style: italic;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.85;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-graphic {
    width: 100%;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero-graphic::before {
    content: '🎬';
    font-size: 6rem;
    position: absolute;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
}

.hero-graphic::after {
    content: '✨';
    font-size: 3rem;
    position: absolute;
    top: 20%;
    right: 20%;
    animation: sparkle 3s ease-in-out infinite;
}

.hero-graphic-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-graphic-decoration::before {
    content: '📝';
    font-size: 2.5rem;
    position: absolute;
    bottom: 15%;
    left: 15%;
    animation: float 5s ease-in-out infinite 1s;
    opacity: 0.7;
}

.hero-graphic-decoration::after {
    content: '🎭';
    font-size: 2.5rem;
    position: absolute;
    top: 15%;
    left: 20%;
    animation: float 7s ease-in-out infinite 0.5s;
    opacity: 0.7;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes sparkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: transparent;
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-full {
    width: 100%;
}

/* 通用区域样式 */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* 品牌故事入口 */
.brand-story-entry {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
}

.brand-story-card {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    align-items: center;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.brand-story-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.15);
}

.brand-story-content h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.brand-story-intro {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
    font-style: italic;
}

.brand-story-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.brand-story-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.brand-characters-preview {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.brand-char {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    transition: var(--transition);
}

.brand-char:hover {
    transform: scale(1.1) rotate(5deg);
}

/* 品牌故事页面 */
.brand-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0 4rem;
    text-align: center;
}

.brand-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.brand-hero-subtitle {
    font-size: 1.5rem;
    opacity: 0.9;
    font-style: italic;
    letter-spacing: 0.1em;
}

.brand-section {
    padding: 5rem 0;
}

.brand-section:nth-child(even) {
    background: var(--bg-light);
}

.brand-content h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.brand-intro {
    font-size: 1.25rem;
    text-align: center;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.brand-characters {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.brand-character-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.brand-character-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.character {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.character-meaning h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.character-meaning p {
    color: var(--text-light);
    line-height: 1.8;
}

.brand-philosophy h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

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

.philosophy-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.philosophy-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.philosophy-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.philosophy-card h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.philosophy-card p {
    color: var(--text-light);
    line-height: 1.8;
}

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

.brand-vision h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.vision-lead {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 2rem;
}

.vision-content p {
    font-size: 1.125rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.brand-promise h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.promise-list {
    max-width: 900px;
    margin: 0 auto;
}

.promise-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.promise-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.promise-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.3;
    flex-shrink: 0;
}

.promise-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.promise-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.brand-cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.brand-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.brand-cta p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 数据统计 */
.stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 4rem 0;
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* 用户评价 */
.testimonials {
    background: var(--bg-light);
    padding: 5rem 0;
}

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

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

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    color: var(--text-light);
    line-height: 1.8;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.author-info h4 {
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.author-info p {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* 常见问题 */
.faq {
    padding: 5rem 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-lg);
}

.faq-item h3 {
    color: var(--text-dark);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.faq-item p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* 功能特性 */
.features {
    background: var(--bg-light);
}

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

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

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 工作流程 */
.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
    transition: var(--transition);
}

.step:hover {
    background: white;
    box-shadow: var(--shadow-lg);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.step p {
    color: var(--text-light);
}

.step-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* 技术优势 */
.tech-advantages {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 5rem 0;
}

.tech-advantages .section-header h2 {
    color: white;
}

.tech-advantages .section-header p {
    color: rgba(255, 255, 255, 0.9);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.tech-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tech-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: white;
}

.tech-card p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

/* 技术优势响应式 */
@media (max-width: 768px) {
    .tech-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tech-card {
        padding: 1.5rem;
    }
}

/* 法律页面样式 */
.legal-page {
    padding: 4rem 0;
    background: var(--bg-light);
    min-height: calc(100vh - 200px);
}

.legal-page h1 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    text-align: center;
}

.legal-page .last-updated {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
    font-size: 0.9rem;
}

.legal-content {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.legal-content h2 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.legal-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.legal-content ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.legal-content li {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.legal-content li strong {
    color: var(--text-dark);
}

@media (max-width: 768px) {
    .legal-page {
        padding: 2rem 0;
    }
    
    .legal-content {
        padding: 1.5rem;
    }
    
    .legal-page h1 {
        font-size: 2rem;
    }
    
    .legal-content h2 {
        font-size: 1.3rem;
    }
}

/* 价格方案 */
.pricing {
    background: var(--bg-light);
}

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

.pricing-card {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.price span {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.pricing-features li {
    padding: 0.75rem 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* 联系我们 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-light);
}

.contact-form {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-graphic {
        height: 300px;
    }

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

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .steps {
        flex-direction: column;
    }

    .step-arrow {
        transform: rotate(90deg);
    }

    /* 品牌故事入口响应式 */
    .brand-story-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .brand-story-visual {
        order: -1;
    }

    .brand-characters-preview {
        flex-direction: row;
        justify-content: center;
    }

    .brand-char {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

    /* 品牌故事页面响应式 */
    .brand-characters {
        grid-template-columns: 1fr;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .promise-item {
        flex-direction: column;
        text-align: center;
    }

    .cta-buttons {
        flex-direction: column;
    }

    /* 数据统计响应式 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    /* 用户评价响应式 */
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    /* FAQ响应式 */
    .faq-item {
        padding: 1.5rem;
    }
}

/* 下载中心页面样式 */
.download-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0 4rem;
    text-align: center;
}

.download-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.download-hero-subtitle {
    font-size: 1.5rem;
    opacity: 0.9;
    margin-bottom: 3rem;
}

.download-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 2rem;
}

.download-stats .stat-item {
    text-align: center;
}

.download-stats .stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.download-stats .stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.download-section {
    padding: 5rem 0;
}

.download-section:nth-child(even) {
    background: var(--bg-light);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.download-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.download-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.download-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.download-version {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.download-size {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.download-requirements {
    list-style: none;
    text-align: left;
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.download-requirements li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

.download-requirements li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.download-arrow {
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-5px);
    }
    60% {
        transform: translateY(-3px);
    }
}

.mobile-download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.mobile-download-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 2rem;
    align-items: center;
    transition: var(--transition);
}

.mobile-download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.mobile-download-content {
    flex: 1;
}

.mobile-download-content h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.mobile-download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.mobile-qr-code {
    flex-shrink: 0;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: var(--bg-light);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.qr-code {
    font-size: 3rem;
    margin-top: 0.5rem;
}

.qr-placeholder span {
    font-size: 0.875rem;
    color: var(--text-light);
}

.web-version-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem;
    border-radius: 20px;
    text-align: center;
    margin-top: 3rem;
}

.web-version-content h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.web-version-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.web-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
    text-align: left;
}

.web-features li {
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
}

.version-timeline {
    max-width: 800px;
    margin: 3rem auto;
    position: relative;
}

.version-timeline:before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.version-item {
    position: relative;
    padding-left: 100px;
    margin-bottom: 3rem;
}

.version-badge {
    position: absolute;
    left: 0;
    top: 0;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
}

.version-date {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.version-content {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.version-content h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.version-content ul {
    list-style: none;
}

.version-content li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

.version-content li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.view-all-versions {
    text-align: center;
    margin-top: 2rem;
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

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

.help-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.help-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.help-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.help-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.help-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 3rem;
    border-radius: 16px;
    max-width: 500px;
    text-align: center;
    position: relative;
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    right: 1.5rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-dark);
}

.modal-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.modal-content h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.modal-progress {
    width: 100%;
    height: 8px;
    background: var(--bg-light);
    border-radius: 4px;
    margin: 2rem 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.2s;
}

.modal-tip {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 1rem;
}

.modal-tip a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* 下载中心响应式 */
@media (max-width: 968px) {
    .download-hero h1 {
        font-size: 2.25rem;
    }
    
    .download-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .mobile-download-card {
        flex-direction: column;
    }
    
    .mobile-download-grid {
        grid-template-columns: 1fr;
    }
    
    .version-timeline:before {
        left: 30px;
    }
    
    .version-item {
        padding-left: 70px;
    }
    
    .version-badge {
        font-size: 0.75rem;
        padding: 0.4rem 0.8rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 0;
    }

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

    .nav-menu li {
        margin: 1rem 0;
    }

    .nav-toggle {
        display: flex;
    }

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

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

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

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

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.popular {
        transform: scale(1);
    }

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

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    /* 下载中心移动端 */
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .web-version-card {
        padding: 2rem;
    }
    
    .web-features {
        grid-template-columns: 1fr;
    }
    
    .help-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 20% auto;
        padding: 2rem;
    }

    /* 品牌故事卡片移动端 */
    .brand-story-card {
        grid-template-columns: 1fr;
        padding: 2rem;
    }

    .brand-characters-preview {
        flex-direction: row;
        justify-content: center;
    }

    .brand-char {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

    /* 联系表单移动端 */
    .contact-content {
        grid-template-columns: 1fr;
    }

    /* 步骤移动端 */
    .steps {
        flex-direction: column;
    }

    .step-arrow {
        transform: rotate(90deg);
    }
}