/* ===================================
   夸卜成长激励 - 网站样式文件
   主色调：温暖橙色 + 活力黄色
   =================================== */

/* ==================== 基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 */
    --primary-orange: #FF8C42;
    --primary-orange-dark: #E67325;
    --primary-yellow: #FFD93D;
    --primary-yellow-light: #FFE566;
    
    /* 辅助色 */
    --accent-green: #6BCB77;
    --accent-blue: #4D96FF;
    --accent-purple: #9B59B6;
    
    /* 中性色 */
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --text-light: #BDC3C7;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-lighter: #FDF6E9;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

a {
    color: var(--primary-orange);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--primary-orange-dark);
}

ul {
    list-style: none;
}

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

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(255, 140, 66, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 140, 66, 0.5);
}

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

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

.btn-large {
    padding: 16px 48px;
    font-size: 18px;
}

.btn-download-platform {
    width: 100%;
    margin-bottom: var(--spacing-sm);
}

.btn-download-platform.btn-secondary {
    margin-top: var(--spacing-sm);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-orange);
}

.tagline {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: var(--spacing-xs);
    border-left: 2px solid var(--primary-yellow);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

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

.btn-download {
    padding: 8px 24px !important;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    color: white !important;
    border-radius: var(--radius-md);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 140, 66, 0.4);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ==================== Hero 区域 ==================== */
.hero {
    padding: 120px 0 var(--spacing-lg);
    background: linear-gradient(135deg, var(--bg-lighter) 0%, var(--bg-light) 100%);
    overflow: hidden;
    min-height: calc(100vh - 70px);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

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

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-orange);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeInRight 0.8s ease;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    border-radius: 40px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-preview {
    width: 100%;
    padding: var(--spacing-md);
}

.preview-header {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--bg-light);
}

.preview-item {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.preview-points {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-yellow) 0%, var(--primary-yellow-light) 100%);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    color: var(--primary-orange-dark);
}

/* 抽奖转盘预览 */
.lottery-wheel-preview {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.wheel-container {
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.wheel-circle {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: conic-gradient(
        var(--primary-yellow) 0deg 45deg,
        var(--primary-orange) 45deg 90deg,
        var(--accent-green) 90deg 135deg,
        var(--accent-blue) 135deg 180deg,
        var(--accent-purple) 180deg 225deg,
        #FF6B9D 225deg 270deg,
        #FFA07A 270deg 315deg,
        var(--primary-yellow-light) 315deg 360deg
    );
    position: relative;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    animation: rotateWheel 12s linear infinite;
    z-index: 1;
}

@keyframes rotateWheel {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.wheel-segment {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    z-index: 2;
}

/* 8个扇区的位置计算 - 每个扇区45度 */
.wheel-segment[style*="--i:1"] {
    transform: translate(-50%, -50%) rotate(-22.5deg) translateY(-55px) rotate(22.5deg);
}

.wheel-segment[style*="--i:2"] {
    transform: translate(-50%, -50%) rotate(22.5deg) translateY(-55px) rotate(-22.5deg);
}

.wheel-segment[style*="--i:3"] {
    transform: translate(-50%, -50%) rotate(67.5deg) translateY(-55px) rotate(-67.5deg);
}

.wheel-segment[style*="--i:4"] {
    transform: translate(-50%, -50%) rotate(112.5deg) translateY(-55px) rotate(-112.5deg);
}

.wheel-segment[style*="--i:5"] {
    transform: translate(-50%, -50%) rotate(157.5deg) translateY(-55px) rotate(-157.5deg);
}

.wheel-segment[style*="--i:6"] {
    transform: translate(-50%, -50%) rotate(202.5deg) translateY(-55px) rotate(-202.5deg);
}

.wheel-segment[style*="--i:7"] {
    transform: translate(-50%, -50%) rotate(247.5deg) translateY(-55px) rotate(-247.5deg);
}

.wheel-segment[style*="--i:8"] {
    transform: translate(-50%, -50%) rotate(292.5deg) translateY(-55px) rotate(-292.5deg);
}

.wheel-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
}

.wheel-pointer {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 32px;
    color: var(--primary-orange-dark);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    z-index: 10;
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.3));
}

.wheel-info {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.wheel-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-orange);
}

/* 功能模块概要 */
.feature-modules {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
}

.feature-module-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    font-size: 13px;
}

.module-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.module-text {
    color: var(--text-primary);
    font-weight: 500;
}

/* ==================== 页面标题 ==================== */
.page-header {
    padding: 120px 0 var(--spacing-xl);
    background: linear-gradient(135deg, var(--bg-lighter) 0%, var(--bg-light) 100%);
    text-align: center;
}

.page-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ==================== 核心价值主张 ==================== */
.value-props {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.props-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.prop-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.prop-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.prop-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.prop-desc {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==================== 快速功能展示 ==================== */
.quick-features {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.features-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 40px;
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-content p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==================== 信任背书 ==================== */
.testimonials {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.testimonial-card {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-orange);
}

.testimonial-content {
    margin-bottom: var(--spacing-md);
}

.testimonial-content p {
    color: var(--text-primary);
    font-style: italic;
    font-size: 15px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-yellow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.author-name {
    display: block;
    font-weight: 600;
}

.author-role {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ==================== CTA 区域 ==================== */
.cta-section {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    text-align: center;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

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

.cta-section .btn-primary:hover {
    background: var(--bg-light);
    color: var(--primary-orange-dark);
}

/* ==================== 功能详情 ==================== */
.feature-detail {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.feature-detail.feature-reverse {
    background: var(--bg-light);
}

.feature-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.feature-detail-text {
    animation: fadeInLeft 0.6s ease;
}

.feature-detail-image {
    animation: fadeInRight 0.6s ease;
}

.feature-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--primary-yellow) 0%, var(--primary-yellow-light) 100%);
    color: var(--primary-orange-dark);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-detail-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.feature-detail-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 16px;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-primary);
}

.feature-preview {
    display: flex;
    justify-content: center;
}

.preview-card,
.points-card,
.wishlist-card,
.stats-card {
    width: 320px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.preview-header,
.points-header,
.wishlist-header,
.stats-header {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    color: white;
    font-weight: 600;
    font-size: 18px;
}

.preview-body {
    padding: var(--spacing-md);
}

.preview-task {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.task-points {
    color: var(--primary-orange);
    font-weight: 600;
}

/* 抽奖转盘预览 */
.wheel-preview {
    width: 200px;
    height: 200px;
    position: relative;
}

.wheel-preview .wheel-circle {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(
        var(--primary-yellow) 0deg 60deg,
        var(--primary-orange) 60deg 120deg,
        var(--accent-green) 120deg 180deg,
        var(--accent-blue) 180deg 240deg,
        var(--accent-purple) 240deg 300deg,
        var(--primary-yellow-light) 300deg 360deg
    );
    position: relative;
}

.wheel-preview .wheel-segment {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 24px;
}

.wheel-preview .wheel-pointer {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 32px;
    color: var(--primary-orange-dark);
}

/* 积分卡片 */
.points-amount {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-orange);
    text-align: center;
    padding: var(--spacing-md) 0;
}

.points-history {
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.history-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--bg-light);
    font-size: 14px;
}

.points-add {
    color: var(--accent-green);
    font-weight: 600;
}

.points-subtract {
    color: var(--primary-orange);
    font-weight: 600;
}

/* 愿望清单 */
.wishlist-items {
    padding: var(--spacing-md);
}

.wishlist-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.wishlist-item.completed {
    opacity: 0.6;
}

.wish-name {
    flex: 1;
}

.wish-cost {
    color: var(--primary-orange);
    font-weight: 600;
    margin: 0 var(--spacing-sm);
}

.wish-status {
    font-size: 12px;
    padding: 2px 8px;
    background: var(--primary-yellow);
    border-radius: 10px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
}

.stat-box {
    text-align: center;
    padding: var(--spacing-sm);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
}

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-orange);
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.stats-chart {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    padding: var(--spacing-md);
    height: 80px;
}

.chart-bar {
    width: 20px;
    background: linear-gradient(180deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    border-radius: 4px 4px 0 0;
    transition: height 0.3s ease;
}

/* ==================== 使用场景 ==================== */
.scenario-section {
    padding: var(--spacing-lg) 0;
}

.scenario-card {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.scenario-icon {
    font-size: 64px;
    flex-shrink: 0;
}

.scenario-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.scenario-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.scenario-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tag {
    padding: 6px 16px;
    background: var(--bg-light);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 14px;
}

.scenario-example h4 {
    font-size: 16px;
    margin-bottom: var(--spacing-sm);
}

.scenario-example ul {
    list-style: none;
}

.scenario-example li {
    padding: var(--spacing-xs) 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
}

.scenario-example li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-orange);
}

/* 场景对比 */
.scenario-compare {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.compare-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.compare-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.compare-card.before {
    background: white;
    border: 2px solid #E74C3C;
}

.compare-card.after {
    background: linear-gradient(135deg, var(--accent-green) 0%, #58A65B 100%);
    color: white;
}

.compare-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.compare-list {
    list-style: none;
}

.compare-list li {
    padding: var(--spacing-sm) 0;
    font-size: 16px;
}

.compare-arrow {
    font-size: 48px;
    color: var(--primary-orange);
    font-weight: 700;
}

/* 用户故事 */
.user-stories {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.story-card {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    text-align: center;
}

.story-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.story-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.story-card p {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.story-author {
    color: var(--primary-orange);
    font-weight: 600;
}

/* ==================== FAQ ==================== */
.faq-section {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.faq-categories {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.faq-category-btn {
    padding: 12px 32px;
    background: white;
    border: 2px solid var(--bg-light);
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-category-btn:hover,
.faq-category-btn.active {
    background: var(--primary-orange);
    color: white;
    border-color: var(--primary-orange);
}

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

.faq-item {
    margin-bottom: var(--spacing-md);
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
}

.faq-toggle {
    font-size: 24px;
    color: var(--primary-orange);
    font-weight: 300;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 var(--spacing-md);
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.faq-answer p,
.faq-answer ul {
    color: var(--text-secondary);
    font-size: 14px;
}

.faq-answer ul {
    margin-left: 20px;
    list-style: disc;
}

/* 联系方式 */
.contact-section {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.contact-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
}

.contact-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.contact-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

/* ==================== 下载页面 ==================== */
.download-section {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.download-platforms {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.download-card {
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.platform-icon {
    margin-bottom: var(--spacing-md);
}

.platform-icon svg {
    display: inline-block;
}

.platform-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.platform-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.version-info,
.system-requirement {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
}

.version-label,
.requirement-label {
    color: var(--text-secondary);
}

.version-number,
.requirement-value {
    font-weight: 600;
    color: var(--primary-orange);
}

.download-size {
    color: var(--text-light);
    font-size: 12px;
    margin-top: var(--spacing-sm);
}

/* 版本说明 */
.version-notes {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.version-history {
    max-width: 800px;
    margin: 0 auto;
}

.version-item {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.version-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.version-number {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-orange);
}

.version-date {
    color: var(--text-secondary);
}

.version-tag {
    padding: 4px 12px;
    background: var(--primary-yellow);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-orange-dark);
}

.version-changes {
    list-style: none;
}

.version-changes li {
    padding: var(--spacing-xs) 0;
    padding-left: 24px;
    position: relative;
    font-size: 14px;
}

.change-new::before {
    content: 'NEW';
    position: absolute;
    left: 0;
    padding: 2px 6px;
    background: var(--accent-green);
    color: white;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
}

.change-improve::before {
    content: '↑';
    position: absolute;
    left: 6px;
    color: var(--accent-blue);
    font-weight: 700;
}

.change-fix::before {
    content: 'FIX';
    position: absolute;
    left: 0;
    padding: 2px 6px;
    background: var(--primary-orange);
    color: white;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
}

/* 下载引导 */
.download-guide {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.guide-step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.step-desc {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 系统要求 */
.requirements-section {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.requirement-card {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
}

.requirement-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary-orange);
}

.requirement-card ul {
    list-style: none;
}

.requirement-card li {
    padding: var(--spacing-xs) 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
    font-size: 14px;
}

.requirement-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 700;
}

/* ==================== 关于我们 ==================== */
.brand-story {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.story-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.story-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.story-illustration {
    display: flex;
    justify-content: center;
}

.illustration-icon {
    font-size: 120px;
    text-align: center;
}

.illustration-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-orange);
    text-align: center;
    margin-top: var(--spacing-md);
}

/* 教育理念 */
.education-philosophy {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.philosophy-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

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

.philosophy-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.philosophy-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.philosophy-desc {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 团队介绍 */
.team-section {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.team-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
}

.team-avatar {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-yellow) 0%, var(--primary-yellow-light) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    margin: 0 auto var(--spacing-md);
}

.team-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.team-role {
    color: var(--primary-orange);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.team-desc {
    color: var(--text-secondary);
    font-size: 13px;
}

/* 数据成就 */
.achievements {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--primary-orange-dark) 100%);
    color: white;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.achievement-item {
    text-align: center;
}

.achievement-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.achievement-label {
    font-size: 16px;
    opacity: 0.9;
}

/* 联系方式 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.contact-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 加入我们 */
.join-us {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-light);
}

.positions {
    max-width: 800px;
    margin: var(--spacing-xl) auto;
}

.position-item {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary-orange);
}

.position-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-orange);
}

.position-item p {
    color: var(--text-secondary);
    font-size: 14px;
}

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

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

.footer-section h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--text-light);
    font-size: 14px;
}

.footer-section a:hover {
    color: var(--primary-yellow);
}

.footer-section p {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 14px;
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

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

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

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

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

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

    .feature-detail.feature-reverse .feature-detail-image {
        order: -1;
    }

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

    .download-platforms {
        grid-template-columns: 1fr;
    }

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

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

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

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

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

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

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .section-title {
        font-size: 28px;
    }

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

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

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

    .compare-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

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

    .faq-categories {
        flex-direction: column;
    }

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

    .guide-steps {
        grid-template-columns: 1fr;
    }

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

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

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

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

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

    .scenario-card {
        flex-direction: column;
        text-align: center;
    }

    .scenario-tags {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .page-title {
        font-size: 24px;
    }

    .section-title {
        font-size: 24px;
    }

    .cta-title {
        font-size: 28px;
    }

    .phone-mockup {
        width: 220px;
        height: 440px;
    }
}