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

:root {
    --primary-color: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8C5A;
    --text-dark: #1a1a1a;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-light: #FFF8F5;
    --bg-white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(255, 107, 53, 0.08);
    --shadow-md: 0 4px 16px rgba(255, 107, 53, 0.12);
    --shadow-lg: 0 8px 32px rgba(255, 107, 53, 0.16);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
}

/* 全局图片优化 */
img {
    max-width: 100%;
    height: auto;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    image-rendering: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
}

.logo img {
    height: 40px;
    width: 40px;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

.download-btn-nav {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==================== Hero 区域 ==================== */
.hero {
    background: linear-gradient(135deg, #FF6B35 0%, #FF8C5A 100%);
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    color: white;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 16px;
    opacity: 0.95;
}

.hero-description {
    font-size: 16px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.btn {
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn .icon {
    width: 20px;
    height: 20px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 350px;
    height: 750px;
    background: #1a1a1a;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #333;
    border-radius: 3px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    object-fit: cover;
    image-rendering: auto;
    display: block;
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: auto;
}

/* ==================== 产品特性 ==================== */
.features {
    padding: 100px 0;
    background: var(--bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.feature-image {
    width: 100%;
    height: 770px;
    overflow: hidden;
    background: var(--bg-light);
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
    image-rendering: auto;
    -webkit-font-smoothing: antialiased;
}

.feature-content {
    padding: 30px;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-description {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.8;
}

/* ==================== 下载区域 ==================== */
.download {
    padding: 100px 0;
    background: var(--bg-light);
}

.download-wrapper {
    display: flex;
    align-items: center;
    gap: 80px;
}

.download-content {
    flex: 1;
}

.download-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.download-subtitle {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.download-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--bg-white);
    padding: 20px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.download-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.download-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.download-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.download-platform {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
}

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

.qr-code-section {
    display: flex;
    justify-content: center;
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 160px;
    height: 160px;
    background: var(--bg-white);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
}

.qr-placeholder svg {
    width: 80px;
    height: 80px;
    color: var(--primary-color);
}

.qr-code p {
    font-size: 14px;
    color: var(--text-gray);
}

.download-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.phone-showcase {
    width: 350px;
    height: 750px;
    background: #1a1a1a;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.phone-showcase::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #333;
    border-radius: 3px;
}

.showcase-screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    object-fit: cover;
    image-rendering: auto;
}

/* ==================== 关于我们 ==================== */
.about {
    padding: 100px 0;
    background: var(--bg-white);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 30px;
    text-align: center;
}

.about-text {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin: 60px 0;
    padding: 40px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-gray);
}

.about-values {
    margin-top: 60px;
}

.values-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 40px;
    text-align: center;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.value-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.value-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.value-item h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

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

/* ==================== 页脚 ==================== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-logo img {
    height: 36px;
    width: 36px;
}

.footer-desc {
    color: #999;
    font-size: 14px;
}

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #999;
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #999;
    font-size: 14px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 600px;
    }

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

    .download-wrapper {
        flex-direction: column;
    }

    .download-content {
        text-align: center;
    }

    .download-buttons {
        max-width: 500px;
        margin: 0 auto 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

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

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        padding: 20px;
        box-shadow: var(--shadow-md);
        gap: 20px;
    }

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

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

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

    .download-title,
    .about-title {
        font-size: 32px;
    }

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

    .about-stats {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

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

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .phone-mockup,
    .phone-showcase {
        width: 240px;
        height: 480px;
    }

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

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

[data-aos] {
    animation: fadeIn 0.8s ease-out;
}

[data-aos="fade-up"] {
    animation-delay: 0.2s;
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}