/* ========== 全局重置与变量 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #0a0a1a;
    --bg2: #111128;
    --bg3: #1a1a3a;
    --text: #e0e0f0;
    --text2: #a0a0c0;
    --accent: #ffd700;
    --accent2: #ffaa00;
    --grad1: linear-gradient(135deg, #1a1a3a, #2a2a5a);
    --grad2: linear-gradient(135deg, #ffd700, #ff8c00);
    --glass: rgba(255, 255, 255, 0.05);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
}

.dark-mode {
    --bg: #f0f0fa;
    --bg2: #ffffff;
    --bg3: #e8e8f0;
    --text: #1a1a2a;
    --text2: #555570;
    --glass: rgba(0, 0, 0, 0.03);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* ========== 基础样式 ========== */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

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

a:hover {
    color: var(--accent2);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 头部导航 ========== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition);
}

.dark-mode header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

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

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    font-size: 0.95rem;
}

.nav-links a {
    color: var(--text);
    position: relative;
    padding: 4px 0;
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--glass);
    border-radius: 24px;
    padding: 6px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border var(--transition);
}

.dark-mode .search-box {
    border-color: rgba(0, 0, 0, 0.1);
}

.search-box input {
    background: none;
    border: none;
    color: var(--text);
    outline: none;
    padding: 4px 8px;
    width: 140px;
    font-size: 0.9rem;
}

.search-box input::placeholder {
    color: var(--text2);
}

.search-box button {
    background: none;
    border: none;
    color: var(--text2);
    cursor: pointer;
}

.dark-toggle {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg2);
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 999;
    list-style: none;
}

.mobile-menu a {
    display: block;
    padding: 12px 0;
    color: var(--text);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-menu.open {
    display: block;
}

/* ========== 面包屑 ========== */
.breadcrumb {
    display: flex;
    gap: 8px;
    padding: 16px 0;
    font-size: 0.9rem;
    color: var(--text2);
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
    padding-top: 88px;
}

.breadcrumb a {
    color: var(--text2);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb span {
    color: var(--text);
}

/* ========== Hero 区域 ========== */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(255, 215, 0, 0.08), transparent 60%);
    pointer-events: none;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffd700, #ff8c00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text2);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-banner {
    margin: 40px auto;
    max-width: 900px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.hero-banner:hover {
    transform: scale(1.02);
}

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

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    background: var(--grad2);
    color: #0a0a1a;
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--accent);
    color: #0a0a1a;
}

/* ========== 通用区块 ========== */
section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title p {
    color: var(--text2);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ========== 网格布局 ========== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

/* ========== 卡片 ========== */
.card {
    background: var(--glass);
    border-radius: var(--radius);
    padding: 32px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition);
    box-shadow: var(--shadow);
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 215, 0, 0.2);
}

.card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.card p {
    color: var(--text2);
    font-size: 0.95rem;
}

/* ========== 关于区域 ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text2);
    margin-bottom: 16px;
}

.about-image svg {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ========== 统计区域 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 24px;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text2);
    margin-top: 8px;
}

/* ========== 评价区域 ========== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.testimonial-card {
    background: var(--glass);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.testimonial-card .stars {
    color: var(--accent);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.testimonial-card p {
    color: var(--text2);
    font-style: italic;
    margin-bottom: 16px;
}

.testimonial-card .author {
    font-weight: 600;
    color: var(--text);
}

/* ========== FAQ ========== */
.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--glass);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.faq-question {
    padding: 20px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    transition: background var(--transition);
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.02);
}

.faq-question .icon {
    transition: transform var(--transition);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
    color: var(--text2);
}

.faq-answer.open {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* ========== 新闻 ========== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.news-card {
    background: var(--glass);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition);
}

.news-card:hover {
    transform: translateY(-4px);
}

.news-card .news-image svg {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.news-card .news-content {
    padding: 24px;
}

.news-card .news-content .date {
    color: var(--text2);
    font-size: 0.85rem;
}

.news-card .news-content h3 {
    margin: 8px 0;
    font-size: 1.1rem;
}

.news-card .news-content p {
    color: var(--text2);
    font-size: 0.9rem;
}

/* ========== 相关链接 ========== */
.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin: 40px 0;
}

.related-links a {
    padding: 8px 20px;
    border-radius: 24px;
    background: var(--glass);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-size: 0.9rem;
    transition: all var(--transition);
}

.related-links a:hover {
    background: var(--accent);
    color: #0a0a1a;
    border-color: var(--accent);
}

/* ========== 合作伙伴 ========== */
.partners {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
}

.partners svg {
    opacity: 0.5;
    transition: opacity var(--transition);
    height: 40px;
}

.partners svg:hover {
    opacity: 0.8;
}

/* ========== 页脚 ========== */
footer {
    background: var(--bg2);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 60px 0 30px;
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-col p,
.footer-col a {
    color: var(--text2);
    font-size: 0.9rem;
    display: block;
    margin-bottom: 8px;
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text2);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    color: var(--text2);
}

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

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--grad2);
    border: none;
    color: #0a0a1a;
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

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

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

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

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

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

    .search-box input {
        width: 100px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .container {
        padding: 0 16px;
    }

    .hero-cta .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}