/* ==================== CSS变量 ==================== */
:root {
    /* 主题色 */
    --primary-color: #f4d03f;
    --primary-dark: #d4a017;
    --primary-light: #fff9e6;
    --secondary-color: #8b4513;
    --accent-color: #ff6b6b;
    
    /* 背景色 */
    --bg-primary: #0a0e27;
    --bg-secondary: #141b3d;
    --bg-tertiary: #1a2351;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #8892a6;
    
    /* 边框和阴影 */
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --box-shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #f4d03f 0%, #d4a017 100%);
    --gradient-bg: linear-gradient(180deg, #0a0e27 0%, #141b3d 50%, #1a2351 100%);
    --gradient-card: linear-gradient(135deg, rgba(244, 208, 63, 0.1) 0%, rgba(212, 160, 23, 0.05) 100%);
    
    /* 过渡 */
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
}

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

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

body {
    font-family: var(--font-primary);
    background: var(--gradient-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar.scrolled {
    box-shadow: var(--box-shadow);
    background: rgba(10, 14, 39, 0.98);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-emoji {
    font-size: 1.8rem;
    line-height: 1;
    display: inline-block;
    animation: swing 2s ease-in-out infinite;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

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

.cta-button {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    padding: 0.6rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(244, 208, 63, 0.4);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ==================== 英雄区 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(244, 208, 63, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(139, 69, 19, 0.1) 0%, transparent 50%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23141b3d" fill-opacity="0.3" d="M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,128C960,128,1056,192,1152,197.3C1248,203,1344,149,1392,122.7L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: 100% auto;
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

.announcement {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(244, 208, 63, 0.1);
    border: 1px solid rgba(244, 208, 63, 0.3);
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-size: 0.9rem;
    animation: pulse 2s infinite;
}

.announcement i {
    animation: swing 1s ease-in-out infinite;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(244, 208, 63, 0.3);
    flex-direction: column;
    gap: 0.3rem;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(244, 208, 63, 0.5);
}

.btn-subtitle {
    font-size: 0.85rem;
    font-weight: 400;
    opacity: 0.9;
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.hero-stats {
    color: var(--text-secondary);
    font-size: 1rem;
}

.hero-stats .highlight {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.2rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    font-size: 2rem;
    color: var(--primary-color);
    cursor: pointer;
}

/* ==================== 节区样式 ==================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 1.5rem auto 0;
}

/* ==================== 功能特色区 ==================== */
.features {
    padding: 6rem 0;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
    border-color: rgba(244, 208, 63, 0.3);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

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

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.highlight-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    border: 1px solid rgba(244, 208, 63, 0.2);
}

.highlight-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.highlight-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==================== 应用场景 ==================== */
.use-cases {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

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

.use-case-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.use-case-item:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.use-case-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.use-case-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

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

/* ==================== 最新动态 ==================== */
.news {
    padding: 6rem 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.news-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    gap: 1.5rem;
    transition: var(--transition);
}

.news-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
    border-color: rgba(244, 208, 63, 0.3);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 70px;
    background: var(--gradient-primary);
    color: var(--bg-primary);
    border-radius: 10px;
    padding: 0.5rem;
}

.date-day {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.date-month {
    font-size: 0.9rem;
    font-weight: 500;
}

.news-content {
    flex: 1;
}

.news-tag {
    display: inline-block;
    background: rgba(244, 208, 63, 0.2);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.news-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.news-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.news-link {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.news-link:hover {
    gap: 0.8rem;
}

/* ==================== 用户评价 ==================== */
.reviews {
    padding: 6rem 0;
    background: var(--bg-tertiary);
}

.rating-summary {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
}

.rating-score {
    text-align: center;
}

.score-number {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stars {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 0.5rem 0;
}

.rating-score p {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.rating-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
}

.tag {
    background: rgba(244, 208, 63, 0.15);
    color: var(--primary-color);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid rgba(244, 208, 63, 0.3);
}

.reviews-slider {
    position: relative;
    overflow: hidden;
    padding: 1rem 0;
}

.reviews-track {
    display: flex;
    gap: 2rem;
    transition: transform 0.5s ease;
}

.review-card {
    min-width: calc(33.333% - 1.5rem);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
}

.review-card:hover {
    background: var(--bg-card-hover);
    box-shadow: var(--box-shadow);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.reviewer-info {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.reviewer-avatar {
    font-size: 3rem;
    color: var(--primary-color);
}

.reviewer-info h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.review-stars {
    color: var(--primary-color);
    font-size: 0.9rem;
}

.review-text {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.review-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.review-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gradient-primary);
    color: var(--bg-primary);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.slider-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 15px rgba(244, 208, 63, 0.4);
}

.prev-btn {
    left: -25px;
}

.next-btn {
    right: -25px;
}

/* ==================== 常见问题 ==================== */
.faq {
    padding: 6rem 0;
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
}

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

.faq-item {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(244, 208, 63, 0.3);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition);
    font-size: 1.2rem;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 2rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== CTA区域 ==================== */
.cta-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(244, 208, 63, 0.1) 0%, rgba(139, 69, 19, 0.1) 100%);
    text-align: center;
}

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

.cta-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-primary);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    transform: translateY(-3px);
}

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

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    font-size: 0.9rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-legal {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.footer-legal a {
    color: var(--text-muted);
}

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

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--gradient-primary);
    color: var(--bg-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--box-shadow);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(244, 208, 63, 0.4);
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

@keyframes swing {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(-15deg);
    }
    75% {
        transform: rotate(15deg);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .review-card {
        min-width: calc(50% - 1rem);
    }
}

@media (max-width: 768px) {
    /* 导航栏 */
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: rgba(10, 14, 39, 0.98);
        flex-direction: column;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--box-shadow);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    /* 英雄区 */
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    /* 功能特色 */
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    /* 新闻 */
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    /* 评价 */
    .review-card {
        min-width: 100%;
    }
    
    .slider-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
    
    /* 节标题 */
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    /* CTA */
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .rating-summary {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}