/* style.css - leyu.com 完整样式 */
:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #0f3460;
    --gold: #e94560;
    --text: #f1f1f1;
    --card-bg: #1e2a4a;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --radius: 12px;
    --transition: 0.3s ease;
    --glass-bg: rgba(255,255,255,0.05);
    --glass-border: rgba(255,255,255,0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--primary);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 毛玻璃效果 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

/* 头部 */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(26,26,46,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}
.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold), #ff6b6b, #f39c12);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoPulse 3s ease-in-out infinite;
}
@keyframes logoPulse {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}
nav a {
    margin-left: 25px;
    font-size: 0.95rem;
    opacity: 0.8;
    transition: opacity var(--transition), transform var(--transition);
    position: relative;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width var(--transition);
}
nav a:hover { opacity: 1; transform: translateY(-2px); }
nav a:hover::after { width: 100%; }
.menu-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; }

/* Hero渐变Banner */
.hero {
    text-align: center;
    padding: 100px 20px 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 40%, var(--accent) 70%, #0d1b2a 100%);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(233,69,96,0.15) 0%, transparent 60%);
    animation: heroGlow 8s ease-in-out infinite;
}
@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(10%, 10%); }
}
.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--gold), #ff6b6b, #f39c12);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    animation: fadeInUp 1s ease;
}
.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
    position: relative;
    animation: fadeInUp 1.2s ease;
}
.hero .btn {
    display: inline-block;
    padding: 14px 40px;
    background: linear-gradient(135deg, var(--gold), #ff6b6b);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
    animation: fadeInUp 1.4s ease;
}
.hero .btn:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 10px 30px rgba(233,69,96,0.5); }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 通用段落 */
section { padding: 70px 0; }
h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    display: inline-block;
    width: 100%;
}
h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--gold), #ff6b6b);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.03);
}
.card:hover { transform: translateY(-8px); box-shadow: 0 8px 30px rgba(0,0,0,0.5); }
.card h3 { font-size: 1.3rem; margin-bottom: 12px; color: var(--gold); }
.card p { opacity: 0.85; font-size: 0.95rem; }

/* 内容区域 */
.about-content, .story-content { max-width: 800px; margin: 0 auto; text-align: center; }
.about-content p, .story-content p { margin-bottom: 15px; opacity: 0.9; }

/* 统计 */
.stat-grid {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
    margin-top: 40px;
}
.stat-item { text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: 700; color: var(--gold); }
.stat-label { opacity: 0.7; margin-top: 5px; }

/* 用户反馈 */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}
.testimonial-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    font-style: italic;
    transition: transform var(--transition);
}
.testimonial-card:hover { transform: translateY(-5px); }
.testimonial-card .author { margin-top: 15px; font-style: normal; font-weight: 600; color: var(--gold); }

/* FAQ */
.faq-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.4); }
.faq-question {
    padding: 18px 25px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition);
}
.faq-question:hover { background: rgba(255,255,255,0.05); }
.faq-question::after { content: '+'; font-size: 1.5rem; transition: transform var(--transition); }
.faq-item.active .faq-question::after { transform: rotate(45deg); }
.faq-answer { padding: 0 25px 18px; display: none; }
.faq-item.active .faq-answer { display: block; }

/* 指南步骤 */
.howto-steps { max-width: 700px; margin: 0 auto; }
.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    align-items: flex-start;
    opacity: 0;
    transform: translateX(-20px);
    animation: stepSlide 0.6s ease forwards;
}
.howto-step:nth-child(1) { animation-delay: 0.1s; }
.howto-step:nth-child(2) { animation-delay: 0.2s; }
.howto-step:nth-child(3) { animation-delay: 0.3s; }
.howto-step:nth-child(4) { animation-delay: 0.4s; }
.howto-step:nth-child(5) { animation-delay: 0.5s; }
@keyframes stepSlide {
    to { opacity: 1; transform: translateX(0); }
}
.step-number {
    background: linear-gradient(135deg, var(--gold), #ff6b6b);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(233,69,96,0.3);
}
.step-content { flex: 1; }
.step-content h4 { margin-bottom: 5px; }
.step-content p { opacity: 0.85; }

/* 文章 */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}
.article-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}
.article-card:hover { transform: translateY(-5px); }
.article-card .date { font-size: 0.85rem; opacity: 0.6; margin-bottom: 8px; }
.article-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.article-card p { opacity: 0.85; margin-bottom: 15px; }
.article-card .read-more { color: var(--gold); font-weight: 600; transition: opacity var(--transition); }
.article-card .read-more:hover { opacity: 0.8; }

/* 联系 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}
.contact-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    transition: transform var(--transition);
}
.contact-item:hover { transform: translateY(-5px); }
.contact-item h4 { margin-bottom: 8px; color: var(--gold); }

/* 页脚 */
footer {
    background: var(--secondary);
    padding: 50px 20px 30px;
    border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}
.footer-col h4 { margin-bottom: 15px; color: var(--gold); }
.footer-col a, .footer-col p { display: block; margin-bottom: 8px; opacity: 0.7; font-size: 0.9rem; transition: opacity var(--transition); }
.footer-col a:hover { opacity: 1; }
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.05);
    font-size: 0.85rem;
    opacity: 0.6;
}

/* 回到顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--gold), #ff6b6b);
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition), transform var(--transition);
    z-index: 99;
    border: none;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(233,69,96,0.3);
}
.back-to-top.visible { opacity: 1; }
.back-to-top:hover { transform: scale(1.1); }

/* 暗色模式 */
.dark-mode {
    --primary: #f5f5f5;
    --secondary: #e0e0e0;
    --accent: #bbdefb;
    --text: #1a1a2e;
    --card-bg: #ffffff;
    --shadow: 0 4px 20px rgba(0,0,0,0.1);
    --glass-bg: rgba(0,0,0,0.03);
    --glass-border: rgba(0,0,0,0.05);
}
.dark-mode header { background: rgba(245,245,245,0.85); }
.dark-mode .card, .dark-mode .testimonial-card, .dark-mode .faq-item, .dark-mode .article-card, .dark-mode .contact-item { border: 1px solid rgba(0,0,0,0.05); }
.dark-mode .hero { background: linear-gradient(135deg, #f5f5f5, #e0e0e0, #bbdefb); }
.dark-mode .hero h1 { background: linear-gradient(135deg, #e94560, #ff6b6b, #f39c12); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.dark-mode .hero .btn { background: linear-gradient(135deg, #e94560, #ff6b6b); }

/* 搜索框 */
.search-box {
    display: flex;
    max-width: 500px;
    margin: 0 auto 40px;
    position: relative;
    z-index: 1;
}
.search-box input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 50px 0 0 50px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 1rem;
    backdrop-filter: blur(4px);
    transition: box-shadow var(--transition);
}
.search-box input:focus { outline: none; box-shadow: 0 0 0 2px var(--gold); }
.search-box button {
    padding: 12px 25px;
    border: none;
    background: linear-gradient(135deg, var(--gold), #ff6b6b);
    color: #fff;
    border-radius: 0 50px 50px 0;
    cursor: pointer;
    font-weight: 600;
    transition: opacity var(--transition);
}
.search-box button:hover { opacity: 0.9; }

/* 轮播 */
.banner-carousel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    max-width: 900px;
    margin: 0 auto 40px;
    background: var(--card-bg);
    box-shadow: var(--shadow);
}
.banner-slide {
    display: none;
    padding: 60px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--card-bg), var(--secondary));
}
.banner-slide.active { display: block; animation: fadeIn 0.5s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.banner-slide h3 { font-size: 1.8rem; margin-bottom: 15px; }
.carousel-dots { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.3); cursor: pointer; transition: background var(--transition), transform var(--transition); }
.dot.active { background: var(--gold); transform: scale(1.2); }
.dot:hover { background: var(--gold); }

/* 响应式 */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }
    nav { display: none; }
    nav.active { display: flex; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--primary); padding: 20px; z-index: 100; border-bottom: 1px solid rgba(255,255,255,0.05); }
    nav a { margin: 10px 0; }
    .menu-toggle { display: block; }
    .stat-grid { gap: 30px; }
    .card-grid, .testimonial-grid, .article-grid, .contact-grid { grid-template-columns: 1fr; }
    .banner-slide { padding: 40px 20px; }
    .banner-slide h3 { font-size: 1.4rem; }
    .back-to-top { bottom: 20px; right: 20px; width: 45px; height: 45px; font-size: 1.2rem; }
    .dark-mode .hero { background: linear-gradient(135deg, #f5f5f5, #e0e0e0, #bbdefb); }
}
@media (max-width: 480px) {
    .hero { padding: 60px 15px 50px; }
    .hero h1 { font-size: 1.6rem; }
    .container { padding: 0 15px; }
    section { padding: 50px 0; }
    h2 { font-size: 1.5rem; }
    .logo { font-size: 1.4rem; }
    .stat-number { font-size: 2rem; }
}

/* 滚动动画 (Intersection Observer 配合) */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}