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

:root {
    --primary: #e94560;
    --primary-dark: #c23152;
    --secondary: #0f3460;
    --accent: #16213e;
    --bg-light: #f8f9fa;
    --bg-dark: #1a1a2e;
    --text-light: #333;
    --text-dark: #eee;
    --glass-bg: rgba(255,255,255,0.1);
    --glass-border: rgba(255,255,255,0.2);
    --shadow: 0 8px 32px rgba(0,0,0,0.12);
    --radius: 20px;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="dark"] {
    --bg-light: #1a1a2e;
    --bg-dark: #0f0f1a;
    --text-light: #eee;
    --text-dark: #ccc;
    --glass-bg: rgba(0,0,0,0.3);
    --shadow: 0 8px 32px rgba(0,0,0,0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-light);
    color: var(--text-light);
    line-height: 1.7;
    transition: var(--transition);
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary-dark);
}

/* ===== 容器与通用类 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(233,69,96,0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255,255,255,0.6);
    color: #fff;
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
    box-shadow: none;
    transform: translateY(-3px);
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    opacity: 0.8;
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 30px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

/* ===== 网格布局 ===== */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-40 {
    margin-bottom: 40px;
}

.pt-80 {
    padding-top: 80px;
}

.pb-80 {
    padding-bottom: 80px;
}

/* ===== 滚动动画 ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 固定按钮 ===== */
.dark-mode-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 24px;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 8px 24px rgba(233,69,96,0.4);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--secondary);
    color: #fff;
    border: none;
    font-size: 20px;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

/* ===== 头部导航 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav ul li a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    text-decoration: none;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 30px;
    height: 3px;
    background: var(--text-light);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), var(--secondary), var(--bg-dark));
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary), transparent);
    top: -200px;
    right: -200px;
    opacity: 0.3;
    animation: float 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, #ff6b6b, transparent);
    bottom: -100px;
    left: -100px;
    opacity: 0.2;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(30px, -30px) scale(1.1);
    }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 40px;
    width: 100%;
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 900;
    color: #fff;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    color: rgba(255,255,255,0.9);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Banner 轮播 ===== */
.banner-carousel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    margin: 40px auto;
    max-width: 900px;
}

.banner-slide {
    display: none;
    padding: 80px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    color: #fff;
    min-height: 350px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.banner-slide.active {
    display: flex;
    animation: fadeSlide 0.8s ease;
}

@keyframes fadeSlide {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.banner-slide h2 {
    font-size: 2.4rem;
    margin-bottom: 15px;
}

.banner-slide p {
    max-width: 600px;
    opacity: 0.9;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.banner-dots button {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.banner-dots button.active {
    background: var(--primary);
    transform: scale(1.2);
}

/* ===== 统计数字 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.stat-item {
    text-align: center;
    padding: 30px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
    margin-top: 8px;
}

/* ===== 区块通用 ===== */
.about-section,
.culture-section,
.story-section,
.team-section,
.products-section,
.advantages-section,
.services-section,
.solutions-section,
.industries-section,
.clients-section,
.cases-section,
.testimonials-section,
.news-section,
.faq-section,
.howto-section,
.contact-section,
.footer-section {
    padding: 80px 0;
}

/* ===== 团队 ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 30px;
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, var(--primary), #ff6b6b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
}

/* ===== 新闻列表 ===== */
.news-list article {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--glass-border);
}

.news-list article:last-child {
    border-bottom: none;
}

.news-list h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.news-list .date {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 10px;
}

/* ===== FAQ ===== */
.faq-item {
    margin-bottom: 15px;
    border-radius: var(--radius);
    overflow: hidden;
}

.faq-question {
    padding: 18px 25px;
    background: var(--glass-bg);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    border: 1px solid var(--glass-border);
}

.faq-question:hover {
    background: rgba(233,69,96,0.1);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    transition: var(--transition);
}

.faq-item.open .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, padding 0.5s ease;
    background: var(--glass-bg);
    border-left: 1px solid var(--glass-border);
    border-right: 1px solid var(--glass-border);
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: 20px 25px;
}

/* ===== 操作步骤 ===== */
.howto-steps {
    counter-reset: step;
}

.howto-step {
    padding: 20px 0;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    background: var(--primary);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

/* ===== 联系信息 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    padding: 20px;
    text-align: center;
}

.contact-item svg {
    width: 40px;
    height: 40px;
    fill: var(--primary);
    margin-bottom: 15px;
}

/* ===== 页脚 ===== */
.footer-section {
    background: var(--bg-dark);
    color: var(--text-dark);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-grid h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-grid ul {
    list-style: none;
}

.footer-grid ul li {
    margin-bottom: 10px;
}

.footer-grid ul li a {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
}

.footer-grid ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    font-size: 0.9rem;
    opacity: 0.8;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: #fff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 10px auto;
}

/* ===== 搜索模态框 ===== */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.search-modal.open {
    display: flex;
}

.search-modal-content {
    background: var(--bg-light);
    padding: 40px;
    border-radius: var(--radius);
    width: 90%;
    max-width: 500px;
}

.search-modal input {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    font-size: 1rem;
    background: transparent;
    color: var(--text-light);
    transition: var(--transition);
}

.search-modal input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-results {
    margin-top: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.search-results div {
    padding: 12px;
    border-bottom: 1px solid var(--glass-border);
    cursor: pointer;
    transition: var(--transition);
}

.search-results div:hover {
    background: rgba(233,69,96,0.1);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-light);
        padding: 20px;
        box-shadow: var(--shadow);
    }

    nav ul.open {
        display: flex;
    }

    .hero h1 {
        font-size: 2.4rem;
    }

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

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

    .grid-2 {
        grid-template-columns: 1fr;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

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

    .stat-number {
        font-size: 2rem;
    }

    .banner-slide {
        padding: 60px 20px;
        min-height: 250px;
    }

    .banner-slide h2 {
        font-size: 1.6rem;
    }

    .card {
        padding: 20px;
    }

    .hero-content {
        padding: 20px;
    }
}