/* ===== 全局重置与基础样式 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #e94560;
    --primary-dark: #c2314a;
    --primary-light: #ff6b81;
    --bg-dark: #0f0f1a;
    --bg-card: rgba(26, 26, 46, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --text-primary: #f0f0f0;
    --text-secondary: #b0b0c0;
    --text-muted: #7a7a8a;
    --border-glass: rgba(255, 255, 255, 0.1);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(233, 69, 96, 0.3);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-base: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-base);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 渐变背景动画 ===== */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 50%, rgba(233,69,96,0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(15,52,96,0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(233,69,96,0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== 容器 ===== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* ===== 标题样式 ===== */
h2 {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}
h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), transparent);
    margin: 12px auto 0;
    border-radius: 2px;
}

h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

/* ===== 页眉 / 导航 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition);
}
header.scrolled {
    background: rgba(15, 15, 26, 0.95);
    box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 700;
    transition: var(--transition);
}
.logo:hover {
    opacity: 0.85;
}
.logo svg {
    filter: drop-shadow(0 0 8px rgba(233,69,96,0.4));
}
.logo-text {
    background: linear-gradient(135deg, #fff, var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}
.nav-links li a {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}
.nav-links li a::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: var(--transition);
}
.nav-links li a:hover,
.nav-links li a:focus {
    color: #fff;
    background: rgba(233,69,96,0.15);
}
.nav-links li a:hover::before,
.nav-links li a:focus::before {
    width: 60%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.menu-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 首屏横幅 ===== */
.hero-banner {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    margin-top: 0;
}
.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    background: radial-gradient(ellipse at center, rgba(15,52,96,0.6) 0%, rgba(15,15,26,0.9) 100%);
}
.hero-slide.active {
    opacity: 1;
}
.hero-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 900'%3E%3Ccircle cx='200' cy='200' r='300' fill='rgba(233,69,96,0.08)'/%3E%3Ccircle cx='1200' cy='600' r='400' fill='rgba(15,52,96,0.12)'/%3E%3C/svg%3E") center/cover no-repeat;
    animation: heroBgMove 20s ease-in-out infinite alternate;
}
@keyframes heroBgMove {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.1) translate(-20px, -20px); }
}

.hero-content {
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
    position: relative;
    z-index: 2;
    animation: heroFadeIn 1s ease forwards;
}
@keyframes heroFadeIn {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}
.hero-content h1,
.hero-content h2 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 20%, var(--primary-light) 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    line-height: 1.2;
}
.hero-content p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    padding: 14px 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(233,69,96,0.4);
    border: 1px solid rgba(255,255,255,0.1);
}
.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 35px rgba(233,69,96,0.5);
}

.hero-prev,
.hero-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    color: #fff;
    font-size: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-prev { left: 20px; }
.hero-next { right: 20px; }
.hero-prev:hover,
.hero-next:hover {
    background: rgba(233,69,96,0.3);
    transform: translateY(-50%) scale(1.1);
}

.hero-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}
.hero-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.1);
}
.hero-dots span.active {
    background: var(--primary);
    box-shadow: 0 0 12px rgba(233,69,96,0.5);
    transform: scale(1.2);
}

/* ===== 通用 section 间距 ===== */
section {
    padding: 80px 0;
    position: relative;
    z-index: 1;
}

/* ===== 品牌介绍 ===== */
.brand-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 50px;
}
.brand-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1rem;
}
.brand-image svg {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}
.brand-image svg:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

.brand-story,
.brand-history,
.team-intro {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px;
    margin-bottom: 30px;
    transition: var(--transition);
}
.brand-story:hover,
.brand-history:hover,
.team-intro:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.brand-history ul {
    list-style: none;
    padding: 0;
}
.brand-history ul li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}
.brand-history ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}
.brand-history ul li strong {
    color: var(--primary-light);
    margin-right: 6px;
}

/* ===== 产品中心 ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}
.product-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px 20px;
    text-align: center;
    transition: var(--transition);
    cursor: default;
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    border-color: rgba(233,69,96,0.3);
}
.product-card svg {
    margin-bottom: 16px;
    transition: var(--transition);
    filter: drop-shadow(0 0 8px rgba(233,69,96,0.2));
}
.product-card:hover svg {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 0 16px rgba(233,69,96,0.4));
}
.product-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #fff;
}
.product-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.product-advantages {
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px;
}
.product-advantages ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.product-advantages ul li {
    padding: 12px 16px;
    background: rgba(233,69,96,0.08);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    border-left: 3px solid var(--primary);
    font-size: 0.95rem;
}

/* ===== 服务支持 ===== */
.service-system,
.solutions,
.industry-apps {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px;
    margin-bottom: 24px;
    transition: var(--transition);
}
.service-system:hover,
.solutions:hover,
.industry-apps:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}
.service-system p,
.solutions p,
.industry-apps p {
    color: var(--text-secondary);
}

/* ===== 案例展示 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}
.case-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    border-color: rgba(233,69,96,0.2);
}
.case-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.testimonials {
    margin-bottom: 30px;
}
.testimonials blockquote {
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    border-left: 4px solid var(--primary);
    padding: 20px 24px;
    margin-bottom: 16px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
    position: relative;
}
.testimonials blockquote::before {
    content: '"';
    font-size: 2.5rem;
    color: var(--primary);
    position: absolute;
    top: -6px;
    left: 10px;
    opacity: 0.3;
}

.partners {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px;
}
.partners p {
    color: var(--text-secondary);
}

/* ===== 新闻资讯 ===== */
.articles-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.news-article {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}
.news-article:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}
.news-article h3 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: #fff;
}
.article-date {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}
.news-article p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 14px;
}
.read-more {
    display: inline-block;
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}
.read-more:hover {
    color: #fff;
    transform: translateX(4px);
}

/* ===== 常见问题 ===== */
.faq-list {
    display: grid;
    gap: 16px;
}
.faq-item {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    transition: var(--transition);
    cursor: pointer;
}
.faq-item:hover {
    border-color: rgba(233,69,96,0.3);
    transform: translateX(4px);
}
.faq-item h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
    color: #fff;
    position: relative;
    padding-right: 30px;
}
.faq-item h3::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 0;
    font-size: 1.4rem;
    color: var(--primary);
    transition: var(--transition);
}
.faq-item.open h3::after {
    content: '−';
}
.faq-item p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding-top: 0;
}
.faq-item.open p {
    max-height: 300px;
    padding-top: 10px;
}

/* ===== 使用指南 ===== */
.howto-content {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px;
}
.howto-content h3 {
    color: var(--primary-light);
    margin-top: 24px;
    margin-bottom: 12px;
}
.howto-content h3:first-child {
    margin-top: 0;
}
.howto-content ul,
.howto-content ol {
    padding-left: 24px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}
.howto-content ul li,
.howto-content ol li {
    margin-bottom: 6px;
    line-height: 1.7;
}
.howto-content p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* ===== 联系我们 ===== */
.contact-info {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px;
    display: grid;
    gap: 16px;
}
.contact-info p {
    font-size: 1rem;
    color: var(--text-secondary);
}
.contact-info strong {
    color: var(--text-primary);
    margin-right: 8px;
}

/* ===== 网站地图 & 友情链接 ===== */
aside {
    padding: 50px 0;
    background: rgba(0,0,0,0.2);
}
aside .section-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.sitemap h3,
.friend-links h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 1.1rem;
}
.sitemap ul,
.friend-links ul {
    list-style: none;
}
.sitemap ul li,
.friend-links ul li {
    margin-bottom: 8px;
}
.sitemap ul li a,
.friend-links ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.92rem;
}
.sitemap ul li a:hover,
.friend-links ul li a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

/* ===== 页脚 ===== */
footer {
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-glass);
    padding: 40px 0 30px;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.footer-info {
    text-align: center;
}
.footer-info p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 6px;
}
.footer-info a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}
.footer-info a:hover {
    color: var(--primary-light);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    font-size: 1.4rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

/* ===== 滚动动画（Intersection Observer 配合） ===== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    h2 { font-size: 1.8rem; }
    .hero-content h1,
    .hero-content h2 { font-size: 2.2rem; }
    .brand-intro { grid-template-columns: 1fr; }
    aside .section-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(15,15,26,0.95);
        backdrop-filter: blur(20px);
        padding: 20px;
        gap: 4px;
        transform: translateY(-120%);
        transition: var(--transition);
        border-bottom: 1px solid var(--border-glass);
    }
    .nav-links.open {
        transform: translateY(0);
    }
    .nav-links li a {
        display: block;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
    }
    .menu-toggle {
        display: flex;
    }
    .menu-toggle.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .menu-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-content h1,
    .hero-content h2 { font-size: 1.8rem; }
    .hero-content p { font-size: 1rem; }
    .hero-prev, .hero-next {
        width: 40px;
        height: 40px;
        font-size: 1.4rem;
    }
    .hero-prev { left: 10px; }
    .hero-next { right: 10px; }

    .product-grid { grid-template-columns: 1fr; }
    .articles-list { grid-template-columns: 1fr; }
    .cases-grid { grid-template-columns: 1fr; }
    .product-advantages ul { grid-template-columns: 1fr; }

    section { padding: 50px 0; }
    .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; font-size: 1.2rem; }
}

@media (max-width: 480px) {
    .section-container { padding: 0 14px; }
    h2 { font-size: 1.5rem; }
    .hero-content h1,
    .hero-content h2 { font-size: 1.5rem; }
    .hero-content p { font-size: 0.92rem; }
    .cta-button { padding: 12px 28px; font-size: 0.95rem; }
    .brand-history ul li { font-size: 0.88rem; }
    .faq-item { padding: 16px 18px; }
}

/* ===== 暗色模式强制（已是暗色，保留优雅降级） ===== */
@media (prefers-color-scheme: light) {
    :root {
        --bg-dark: #0f0f1a;
        --text-primary: #f0f0f0;
        --text-secondary: #b0b0c0;
        --text-muted: #7a7a8a;
    }
}

/* ===== 无障碍 ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}

/* ===== 毛玻璃通用类 ===== */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
}

/* ===== 选中高亮 ===== */
::selection {
    background: rgba(233, 69, 96, 0.3);
    color: #fff;
}