/* ========== 全局基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f8f9fc;
    color: #1a1a2e;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}
body.dark {
    background: #0f0f1a;
    color: #e0e0e0;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    display: block;
    max-width: 100%;
    height: auto;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
}

/* ========== CSS 变量（亮色/暗色） ========== */
:root {
    --primary: #D4AF37;
    --primary-dark: #b8962e;
    --primary-light: #f0d68a;
    --bg: #f8f9fc;
    --bg-card: #ffffff;
    --text: #1a1a2e;
    --text-light: #555;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --radius: 16px;
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}
body.dark {
    --primary: #D4AF37;
    --primary-dark: #b8962e;
    --primary-light: #f0d68a;
    --bg: #0f0f1a;
    --bg-card: #1a1a2e;
    --text: #e0e0e0;
    --text-light: #aaa;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass: rgba(26, 26, 46, 0.7);
    --glass-border: rgba(212, 175, 55, 0.2);
}

/* ========== 导航栏 ========== */
.nav {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
}
.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
}
.nav-logo svg {
    width: 36px;
    height: 36px;
}
.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    font-size: 0.95rem;
}
.nav-links a {
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: border 0.3s;
}
.nav-links a:hover,
.nav-links a.active {
    border-bottom-color: var(--primary);
}
.nav-toggle {
    display: none;
    background: none;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-size: 1.5rem;
    padding: 4px 12px;
    border-radius: 8px;
    cursor: pointer;
}
.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}
.theme-btn {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    transition: 0.3s;
}
.theme-btn:hover {
    background: var(--primary);
    color: #fff;
}
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--glass);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 12px;
        border-bottom: 1px solid var(--glass-border);
    }
    .nav-links.open {
        display: flex;
    }
    .nav-toggle {
        display: block;
    }
}

/* ========== Hero 区域 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 40%, #2a1a0e 70%, #0f0f1a 100%);
    padding-top: 80px;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(212, 175, 55, 0.08) 0%, transparent 60%),
                radial-gradient(circle at 70% 30%, rgba(212, 175, 55, 0.05) 0%, transparent 50%);
    animation: heroGlow 12s ease-in-out infinite alternate;
}
.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
}
.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #D4AF37, #f0d68a, #D4AF37);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-content p {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 520px;
    margin-bottom: 30px;
}
.hero-content .btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: 0.3s;
    border: none;
    cursor: pointer;
}
.btn-primary {
    background: linear-gradient(135deg, #D4AF37, #b8962e);
    color: #0f0f1a;
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.4);
}
.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #0f0f1a;
}
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}
.hero-visual svg {
    width: 100%;
    max-width: 480px;
    height: auto;
    filter: drop-shadow(0 20px 60px rgba(212, 175, 55, 0.2));
    animation: float 6s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}
@keyframes heroGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(10%, 10%) scale(1.1); }
}

/* ========== Section 通用 ========== */
.section {
    padding: 100px 0;
}
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}
.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 12px auto 0;
    border-radius: 2px;
}
.section-title p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ========== 网格布局 ========== */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; }
}
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
@media (max-width: 768px) {
    .grid-3 { grid-template-columns: 1fr; }
}
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
@media (max-width: 768px) {
    .grid-4 { grid-template-columns: 1fr 1fr; }
}

/* ========== 卡片 ========== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid transparent;
}
.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}
.card-icon {
    margin-bottom: 16px;
}
.card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}
.card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========== Banner 轮播 ========== */
.banner-slider {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    height: 400px;
    background: linear-gradient(135deg, #1a1a2e, #2a1a0e);
}
.banner-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    opacity: 0;
    transition: opacity 0.8s ease;
    text-align: center;
    color: #fff;
}
.banner-slide.active {
    opacity: 1;
}
.banner-slide h3 {
    font-size: 2rem;
    margin-bottom: 12px;
    color: var(--primary);
}
.banner-slide p {
    max-width: 500px;
    color: #ccc;
}
.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}
.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: 0.3s;
}
.banner-dots span.active {
    background: var(--primary);
    width: 30px;
    border-radius: 6px;
}

/* ========== 统计数据 ========== */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
@media (max-width: 768px) {
    .stats { grid-template-columns: repeat(2, 1fr); }
}
.stat-item {
    padding: 24px;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
}
.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--primary);
}
.stat-label {
    color: var(--text-light);
    margin-top: 6px;
}

/* ========== FAQ ========== */
.faq-item {
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    padding: 18px 0;
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.05rem;
}
.faq-question span {
    transition: transform 0.3s;
}
.faq-item.open .faq-question span {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    color: var(--text-light);
    padding-top: 0;
}
.faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 12px;
}

/* ========== 客户 Logo ========== */
.client-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
}
.client-logo {
    opacity: 0.6;
    transition: 0.3s;
    filter: grayscale(1);
}
.client-logo:hover {
    opacity: 1;
    filter: grayscale(0);
}

/* ========== 联系表单 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
}
.contact-info p {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.contact-info svg {
    flex-shrink: 0;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid rgba(212, 175, 55, 0.15);
    padding: 60px 0 20px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--primary);
}
.footer-col ul {
    list-style: none;
}
.footer-col ul li {
    margin-bottom: 8px;
}
.footer-col ul li a {
    color: var(--text-light);
    font-size: 0.9rem;
    transition: color 0.3s;
}
.footer-col ul li a:hover {
    color: var(--primary);
}
.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(212, 175, 55, 0.1);
    font-size: 0.85rem;
    color: var(--text-light);
}
.footer-bottom a {
    color: var(--primary);
}

/* ========== 面包屑 ========== */
.breadcrumb {
    background: var(--glass);
    backdrop-filter: blur(10px);
    padding: 10px 0;
    font-size: 0.85rem;
    color: var(--text-light);
}
.breadcrumb a {
    color: var(--primary);
}
.breadcrumb span {
    margin: 0 6px;
}

/* ========== 返回顶部 ========== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #0f0f1a;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    z-index: 999;
}
.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

/* ========== 毛玻璃通用 ========== */
.backdrop-blur {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* ========== 滚动动画 ========== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 网站地图链接 ========== */
.sitemap-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    padding: 20px 0;
}
.sitemap-links a {
    color: var(--text-light);
    font-size: 0.85rem;
    padding: 4px 12px;
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 20px;
    transition: 0.3s;
}
.sitemap-links a:hover {
    background: var(--primary);
    color: #0f0f1a;
    border-color: var(--primary);
}

/* ========== HowTo 步骤 ========== */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    counter-reset: step;
}
.howto-step {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    position: relative;
    padding-left: 64px;
}
.howto-step::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 20px;
    top: 28px;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: #0f0f1a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

/* ========== 客户评价卡片 ========== */
.testimonial-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}
.testimonial-card .author {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
}
.testimonial-card .author img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-light);
}

/* ========== 团队网格 ========== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}
.team-member {
    text-align: center;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}
.team-member .avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 12px;
    background: linear-gradient(135deg, #D4AF37, #b8962e);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #0f0f1a;
}

/* ========== App 展示 ========== */
.app-showcase {
    background: linear-gradient(135deg, #1a1a2e, #2a1a0e);
    border-radius: var(--radius);
    padding: 60px;
    color: #fff;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
@media (max-width: 768px) {
    .app-showcase {
        grid-template-columns: 1fr;
        padding: 30px;
    }
}

/* ========== 新闻网格 ========== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.news-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: 0.3s;
}
.news-card:hover {
    transform: translateY(-4px);
}
.news-card .news-body {
    padding: 20px;
}
.news-card .news-body h4 {
    margin-bottom: 8px;
}
.news-card .news-body .date {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-bottom: 8px;
    display: block;
}

/* ========== 搜索框 ========== */
.search-box {
    display: flex;
    gap: 8px;
    max-width: 400px;
    margin: 0 auto;
}
.search-box input {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid rgba(212, 175, 55, 0.3);
    border-radius: 50px;
    background: var(--bg-card);
    color: var(--text);
    outline: none;
    transition: 0.3s;
}
.search-box input:focus {
    border-color: var(--primary);
}
.search-box button {
    padding: 10px 20px;
    border-radius: 50px;
    background: var(--primary);
    color: #0f0f1a;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

/* ========== 友情链接 ========== */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    padding: 16px 0;
}
.friend-links a {
    color: var(--text-light);
    font-size: 0.85rem;
    transition: color 0.3s;
}
.friend-links a:hover {
    color: var(--primary);
}

/* ========== 极小屏适配 ========== */
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }
    .section-title h2 {
        font-size: 1.8rem;
    }
    .btn {
        padding: 12px 24px;
    }
}