/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

:root {
    /* 主色系统 - 更丰富的红色调色板 */
    --primary-color: #FF4444;
    --primary-dark: #E63333;
    --primary-light: #FF6B6B;
    --primary-lighter: #FFB3B3;
    --primary-pale: #FFF5F5;

    /* 辅助色 */
    --secondary-color: #FF8844;
    --accent-color: #FFD700;

    /* 渐变系统 */
    --gradient-primary: linear-gradient(135deg, #FF4444 0%, #FF8844 100%);
    --gradient-soft: linear-gradient(135deg, #FFB3B3 0%, #FFD4A3 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(255, 68, 68, 0.95) 0%, rgba(255, 136, 68, 0.95) 100%);
    --gradient-start: #FF4444;
    --gradient-end: #FF8844;

    /* 文字颜色 */
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-tertiary: #767676;
    --text-placeholder: #ADADAD;

    /* 兼容旧变量名 */
    --text-dark: #1A1A1A;
    --text-light: #4A4A4A;
    --text-lighter: #767676;

    /* 背景色 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #F1F3F5;
    --bg-light: #F8F9FA;

    /* 边框 */
    --border-light: #E8E8E8;
    --border-medium: #D4D4D4;
    --border-dark: #B8B8B8;
    --border-color: #E5E5E5;

    /* 阴影系统 - 更层次化 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-colored: 0 8px 24px rgba(255, 68, 68, 0.2);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.15);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);

    /* 间距系统 - 8px 网格 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;

    /* 圆角系统 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.7;
    background-color: var(--bg-primary);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

.scale-in {
    animation: scaleIn 0.5s ease-out forwards;
}

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

/* 导航栏 */
.navbar {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.95);
    transition: all var(--transition-base);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.02);
}

.logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition-base);
    padding: var(--spacing-xs) 0;
    position: relative;
}

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

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

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

.btn-download {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-colored);
    display: inline-block;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-colored);
    filter: brightness(1.05);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}

/* 首页横幅 */
.hero {
    margin-top: 70px;
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--primary-pale) 0%, #FFFFFF 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 68, 68, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.btn {
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition-base);
    display: inline-block;
    text-align: center;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-colored);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-colored);
    filter: brightness(1.05);
}

.btn-primary:active {
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-3xl);
    font-size: 18px;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
}

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

.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    display: block;
}

.stat-label {
    font-size: 14px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.15));
}

/* 功能区块 */
.features {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-primary);
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-3xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.feature-card {
    background: var(--bg-primary);
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-slow);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-colored);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-icon img {
    width: 45px;
    height: 45px;
    filter: brightness(0) invert(1);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 700;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 使用场景轮播 */
.scenarios {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-secondary);
}

.scenarios-carousel-wrapper {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-3xl);
}

.scenarios-carousel {
    overflow: hidden;
    border-radius: var(--radius-xl);
    width: 100%;
}

.scenarios-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
}

.scenario-card {
    min-width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
}

.scenario-image {
    width: 100%;
    height: 400px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scenario-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    object-position: center;
    display: block;
    transition: transform var(--transition-slow);
    position: relative;
    z-index: 0;
}

.scenario-card:hover .scenario-image img {
    transform: scale(1.05);
}

.scenario-content {
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
}

.scenario-content h3 {
    font-size: 22px;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 700;
}

.scenario-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 轮播按钮 */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: none;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    font-size: 28px;
    color: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn:active {
    transform: translateY(-50%) scale(1.05);
}

.carousel-btn-prev {
    left: 0;
}

.carousel-btn-next {
    right: 0;
}

/* 轮播指示点 */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.dot:hover {
    background: var(--primary-light);
    transform: scale(1.2);
}

.dot.active {
    background: var(--primary-color);
    width: 32px;
    border-radius: var(--radius-sm);
}

/* 下载区域 */
.download-section {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-content h2 {
    font-size: 42px;
    margin-bottom: var(--spacing-lg);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.download-content p {
    font-size: 20px;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
}

.download-buttons {
    margin-bottom: var(--spacing-2xl);
}

.download-section .btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.download-section .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    filter: brightness(0.98);
}

.qr-code {
    display: inline-block;
}

.qr-code img {
    width: 180px;
    height: 180px;
    background: white;
    padding: 10px;
    border-radius: 15px;
    margin-bottom: 10px;
}

.qr-code p {
    font-size: 16px;
    margin: 0;
}

/* 页脚 */
.footer {
    background: linear-gradient(180deg, #2A2A2A 0%, #1F1F1F 100%);
    color: #B8B8B8;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: white;
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
}

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

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

.footer-section a {
    color: #B8B8B8;
    text-decoration: none;
    transition: all var(--transition-base);
    display: inline-block;
}

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

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 14px;
}

.footer-bottom p {
    margin: var(--spacing-xs) 0;
    opacity: 0.8;
}

.footer-bottom a {
    color: #B8B8B8;
    text-decoration: none;
    transition: color var(--transition-base);
}

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

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

    .hero-text h1 {
        font-size: 42px;
    }

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

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

    .hero-image {
        text-align: center;
    }

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

    .scenarios-carousel-wrapper {
        padding: 0 50px;
    }

    .carousel-btn {
        width: 45px;
        height: 45px;
        font-size: 24px;
    }

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

/* 响应式设计 - 手机 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        gap: var(--spacing-xs);
    }

    .nav-menu a::after {
        display: none;
    }

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

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

    .btn-download {
        display: none;
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

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

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
    }

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

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

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

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

    .scenarios-carousel-wrapper {
        padding: 0 var(--spacing-2xl);
    }

    .carousel-btn {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }

    .scenario-image {
        height: 240px;
    }

    .scenario-image img {
        object-fit: cover;
    }

    .scenario-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .scenario-content h3 {
        font-size: 22px;
    }

    .scenario-content p {
        font-size: 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .download-content h2 {
        font-size: 28px;
    }

    .download-content p {
        font-size: 16px;
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
    }

    .btn-large {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: 16px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 辅助类 */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.pt-40 {
    padding-top: 40px;
}

.pb-40 {
    padding-bottom: 40px;
}

/* 页面标题 */
.page-header {
    margin-top: 70px;
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: 18px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

/* 功能详解 */
.features-detail {
    padding: var(--spacing-4xl) 0;
}

.feature-detail-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-bottom: var(--spacing-4xl);
}

.feature-detail-item.reverse {
    direction: rtl;
}

.feature-detail-item.reverse > * {
    direction: ltr;
}

.feature-detail-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-colored);
}

.feature-detail-icon img {
    width: 45px;
    height: 45px;
    filter: brightness(0) invert(1);
}

.feature-detail-content h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 800;
    letter-spacing: -0.01em;
}

.feature-detail-content h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
}

.feature-detail-content p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    font-size: 15px;
    color: var(--text-light);
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-detail-image img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-slow);
}

.feature-detail-image img:hover {
    transform: scale(1.02);
}

/* 使用步骤 */
.how-to-use {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-secondary);
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.step-item {
    flex: 1;
    background: white;
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.step-number {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-colored);
}

.step-item h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 700;
}

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

.step-arrow {
    font-size: 32px;
    color: var(--primary-color);
    font-weight: bold;
}

/* 下载页面样式 */
.download-hero {
    margin-top: 70px;
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.download-hero h1 {
    font-size: 48px;
    margin-bottom: var(--spacing-lg);
    font-weight: 800;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.download-hero p {
    font-size: 20px;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.download-methods {
    padding: var(--spacing-4xl) 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
    max-width: 900px;
    margin: 0 auto;
}

.download-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.download-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.download-card:hover::before {
    transform: scaleX(1);
}

.download-card h3 {
    font-size: 24px;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    font-weight: 700;
}

.download-card .qr-code img {
    width: 200px;
    height: 200px;
}

.download-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
}

.download-icon svg {
    width: 120px;
    height: 120px;
}

/* 关于我们页面 */
.about-content {
    padding: 80px 0;
}

.about-section {
    margin-bottom: 60px;
}

.about-section h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.about-section p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 15px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.value-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
}

.value-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

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

/* 联系我们页面 */
.contact-content {
    padding: 80px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 15px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all var(--transition-base);
    background-color: var(--bg-primary);
    font-family: inherit;
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: var(--border-medium);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 68, 68, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}

.submit-btn {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-colored);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-colored);
    filter: brightness(1.05);
}

.submit-btn:active {
    transform: translateY(-1px);
}

.contact-info h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.info-item {
    margin-bottom: 30px;
}

.info-item h3 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.info-item p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 响应式 - 功能页面 */
@media (max-width: 968px) {
    .feature-detail-item,
    .feature-detail-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

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

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

    .steps-grid {
        flex-direction: column;
    }

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

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

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 28px;
    }

    .page-header p {
        font-size: 16px;
    }

    .feature-detail-content h2 {
        font-size: 24px;
    }

    .feature-detail-content h3 {
        font-size: 18px;
    }

    .download-hero h1 {
        font-size: 32px;
    }
}

/* 下载页面额外样式 */
.download-hero .hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
}

.download-notice {
    max-width: 800px;
    margin: 60px auto 0;
    background: var(--bg-light);
    padding: 30px;
    border-radius: 15px;
}

.download-notice h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.download-notice ul {
    list-style: none;
    padding: 0;
}

.download-notice ul li {
    padding: 10px 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.download-notice ul li:last-child {
    border-bottom: none;
}

.download-info {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.download-info p {
    margin: 8px 0;
    font-size: 14px;
    color: var(--text-light);
}

/* 版本更新 */
.version-update {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.update-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.version-info h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.update-date {
    color: var(--text-lighter);
    margin-bottom: 25px;
}

.update-list {
    list-style: none;
    padding: 0;
}

.update-list li {
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.update-list li:last-child {
    border-bottom: none;
}

.version-history h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.history-item {
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 15px;
}

.history-item h4 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.history-item p {
    font-size: 13px;
    color: var(--text-light);
    margin: 3px 0;
}

/* 使用教程 */
.tutorial {
    padding: 80px 0;
}

.tutorial-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 40px;
}

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

.step-num {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.tutorial-step h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.tutorial-step p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 常见问题 */
.faq {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.faq-list {
    max-width: 900px;
    margin: 40px auto 0;
}

.faq-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.faq-item h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.faq-item p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 响应式 - 下载页面 */
@media (max-width: 968px) {
    .update-content {
        grid-template-columns: 1fr;
    }

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

    .download-hero .hero-stats {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .download-hero .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
}

/* 关于我们页面额外样式 */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
    position: relative;
}

.timeline-year {
    width: 100px;
    font-weight: bold;
    color: var(--primary-color);
    padding-right: 30px;
    text-align: right;
}

.timeline-year::after {
    content: '';
    position: absolute;
    left: 92px;
    top: 8px;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-content {
    flex: 1;
    padding-left: 40px;
}

.timeline-content h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 8px;
}

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

.stats-showcase {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-box {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 40px 20px;
    border-radius: 15px;
    text-align: center;
    color: white;
}

.stat-num {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-desc {
    font-size: 14px;
    opacity: 0.95;
}

.honor-list {
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

.honor-list li {
    padding: 15px 20px;
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    margin-bottom: 15px;
    border-radius: 5px;
}

.partners {
    margin-top: 20px;
    padding: 30px;
    background: var(--bg-light);
    border-radius: 15px;
    text-align: center;
}

.partners p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 2;
}

/* 响应式 - 关于我们页面 */
@media (max-width: 968px) {
    .stats-showcase {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-year {
        width: auto;
        position: absolute;
        top: -25px;
        left: 0;
        text-align: left;
        padding-right: 0;
    }

    .timeline-year::after {
        left: 12px;
        top: 28px;
    }

    .timeline-content {
        padding-left: 50px;
    }

    .timeline-item {
        margin-bottom: 60px;
        padding-top: 30px;
    }
}

@media (max-width: 768px) {
    .stats-showcase {
        grid-template-columns: 1fr;
    }
}

/* 联系我们页面额外样式 */
.social-media {
    margin-top: 15px;
}

.social-item {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-light);
}

.social-item strong {
    color: var(--text-dark);
}

.quick-faq {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.faq-quick-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.faq-quick-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.faq-quick-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.faq-quick-item h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.faq-quick-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

.map-section {
    padding: 80px 0;
}

.map-placeholder {
    margin-top: 40px;
    height: 400px;
    background: var(--bg-light);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.map-placeholder p {
    font-size: 16px;
    color: var(--text-light);
    margin: 10px 0;
}

/* 响应式 - 联系我们页面 */
@media (max-width: 768px) {
    .faq-quick-grid {
        grid-template-columns: 1fr;
    }

    .map-placeholder {
        height: 300px;
    }
}