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

:root {
    --bg-primary: #0d0d1a;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.85);
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --accent-primary: #ffd700;
    --accent-secondary: #e94560;
    --accent-glow: rgba(233, 69, 96, 0.3);
    --border-color: rgba(255, 215, 0, 0.15);
    --shadow-color: rgba(0, 0, 0, 0.5);
    --glass-bg: rgba(26, 26, 46, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --transition-speed: 0.3s;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --max-width: 1200px;
    --header-height: 80px;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    position: relative;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    margin-bottom: 0.5em;
}

h2 {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 1.5em;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
}

h2::after {
    content: '';
    display: block;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    margin: 10px auto 0;
    border-radius: 2px;
}

p {
    margin-bottom: 1em;
    color: var(--text-secondary);
}

/* ===== 滚动动画基础 ===== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 头部 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 13, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: background var(--transition-speed) ease;
}

.header-top {
    padding: 6px 0;
    background: linear-gradient(135deg, rgba(233, 69, 96, 0.15), rgba(255, 215, 0, 0.1));
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.85rem;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top span {
    color: var(--text-secondary);
    font-weight: 300;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

#darkModeToggle {
    font-size: 1.2rem;
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
    transition: background var(--transition-speed) ease;
}

#darkModeToggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.search-box {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: border-color var(--transition-speed) ease;
}

.search-box:focus-within {
    border-color: var(--accent-primary);
}

#searchInput {
    background: transparent;
    border: none;
    padding: 6px 12px;
    color: var(--text-primary);
    outline: none;
    width: 180px;
    font-size: 0.85rem;
}

#searchInput::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

#searchBtn {
    padding: 6px 12px;
    font-size: 0.9rem;
    background: transparent;
    transition: background var(--transition-speed) ease;
}

#searchBtn:hover {
    background: rgba(255, 215, 0, 0.1);
}

.header-main {
    padding: 12px 0;
}

.header-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
}

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

.main-nav ul {
    display: flex;
    gap: 24px;
    align-items: center;
}

.main-nav a {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-speed) ease;
}

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

.main-nav a:hover {
    color: var(--accent-primary);
}

.main-nav a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    padding: 8px;
    color: var(--text-primary);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 100px 0 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--glass-border);
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    font-size: 0.85rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.breadcrumb li + li::before {
    content: '/';
    color: var(--text-secondary);
    opacity: 0.5;
}

.breadcrumb a {
    color: var(--accent-primary);
    transition: color var(--transition-speed) ease;
}

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

.breadcrumb li:last-child span {
    color: var(--text-primary);
    font-weight: 500;
}

/* ===== Hero Banner ===== */
.hero-banner {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 40%, #16213e 70%, #0f3460 100%);
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(233, 69, 96, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(255, 215, 0, 0.06) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-5%, -5%) rotate(5deg); }
}

.hero-banner .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), #fff, var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5em;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5em;
    max-width: 500px;
}

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

.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-speed) ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #ffaa00);
    color: #1a1a2e;
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
    color: #1a1a2e;
}

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-secondary:hover {
    background: rgba(255, 215, 0, 0.1);
    transform: translateY(-3px);
    color: var(--accent-primary);
}

.hero-slider {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.slide {
    display: none;
    animation: slideFade 0.5s ease;
}

.slide.active {
    display: block;
}

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

.slide svg {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
}

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
}

.slider-controls button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) ease;
}

.slider-controls button:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.dots {
    display: flex;
    gap: 8px;
}

.dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.dots span.active {
    background: var(--accent-primary);
    width: 24px;
    border-radius: 5px;
}

/* ===== 品牌介绍 ===== */
.about-section {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.2em;
    line-height: 1.8;
}

.about-image svg {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

/* ===== 企业文化 ===== */
.culture-section {
    background: var(--bg-primary);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.culture-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.1);
}

.culture-card svg {
    margin: 0 auto 20px;
}

.culture-card h3 {
    font-size: 1.4rem;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.culture-card p {
    font-size: 0.95rem;
}

/* ===== 团队介绍 ===== */
.team-section {
    background: var(--bg-secondary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.team-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.team-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-secondary);
    box-shadow: 0 10px 40px rgba(233, 69, 96, 0.1);
}

.team-card svg {
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
}

.team-card h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.team-card p:first-of-type {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.team-card p:last-of-type {
    font-size: 0.9rem;
}

/* ===== 产品中心 ===== */
.products-section {
    background: var(--bg-primary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-speed) ease;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.15);
}

.product-card svg {
    width: 100%;
    border-radius: var(--border-radius-sm);
    margin-bottom: 16px;
    transition: transform var(--transition-speed) ease;
}

.product-card:hover svg {
    transform: scale(1.05);
}

.product-card h3 {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.product-card p {
    font-size: 0.9rem;
}

/* ===== 产品优势 ===== */
.advantages-section {
    background: var(--bg-secondary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px 24px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.1);
}

.advantage-card svg {
    margin: 0 auto 16px;
}

.advantage-card h3 {
    font-size: 1.1rem;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.advantage-card p {
    font-size: 0.9rem;
}

/* ===== 服务支持 ===== */
.services-section {
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.1);
}

.service-card svg {
    margin: 0 auto 20px;
}

.service-card h3 {
    font-size: 1.3rem;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.95rem;
}

/* ===== 核心优势 ===== */
.core-adv-section {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
    padding: 60px 0;
}

.core-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    text-align: center;
}

.core-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 40px 24px;
    transition: all var(--transition-speed) ease;
}

.core-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.core-number {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.core-card p {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.core-card span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== 解决方案 ===== */
.solutions-section {
    background: var(--bg-secondary);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px;
    transition: all var(--transition-speed) ease;
}

.solution-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
}

.solution-card h3 {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.solution-card p {
    font-size: 0.95rem;
}

/* ===== 应用行业 ===== */
.industries-section {
    background: var(--bg-primary);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.industry-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.industry-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.1);
}

.industry-card svg {
    margin: 0 auto 16px;
}

.industry-card h3 {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.industry-card p {
    font-size: 0.9rem;
}

/* ===== 成功案例 ===== */
.cases-section {
    background: var(--bg-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 24px;
    transition: all var(--transition-speed) ease;
}

.case-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-secondary);
    box-shadow: 0 10px 40px rgba(233, 69, 96, 0.1);
}

.case-card svg {
    width: 100%;
    border-radius: var(--border-radius-sm);
    margin-bottom: 16px;
}

.case-card h3 {
    font-size: 1.1rem;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.case-card p {
    font-size: 0.9rem;
}

/* ===== 客户评价 ===== */
.testimonials-section {
    background: var(--bg-primary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px;
    text-align: center;
    transition: all var(--transition-speed) ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.testimonial-card svg {
    margin: 0 auto 16px;
    border-radius: 50%;
}

.testimonial-card p {
    font-style: italic;
    font-size: 0.95rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.testimonial-card span {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== 新闻资讯 ===== */
.news-section {
    background: var(--bg-secondary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 20px;
    transition: all var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.1);
}

.news-card svg {
    width: 100%;
    border-radius: var(--border-radius-sm);
    margin-bottom: 12px;
}

.news-card h3 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 6px;
    flex: 1;
}

.news-card time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: block;
}

.news-card p {
    font-size: 0.85rem;
    margin-bottom: 12px;
    flex: 1;
}

.read-more {
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-weight: 600;
    transition: color var(--transition-speed) ease;
    align-self: flex-start;
}

.read-more:hover {
    color: var(--accent-secondary);
}

/* ===== 最新文章 ===== */
.latest-articles-section {
    background: var(--bg-primary);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.articles-grid article {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 24px;
    transition: all var(--transition-speed) ease;
}

.articles-grid article:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary);
}

.articles-grid h3 {
    font-size: 1.1rem;
    color: var(--accent-primary);
    margin-bottom: 6px;
}

.articles-grid time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 10px;
}

.articles-grid p {
    font-size: 0.9rem;
    margin-bottom: 12px;
}

/* ===== 热门推荐 & 相关推荐 ===== */
.hot-recommend-section,
.related-recommend-section {
    background: var(--bg-secondary);
}

.recommend-grid,
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.recommend-card,
.related-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px;
    transition: all var(--transition-speed) ease;
}

.recommend-card:hover,
.related-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.recommend-card h3,
.related-card h3 {
    font-size: 1.1rem;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.recommend-card p,
.related-card p {
    font-size: 0.9rem;
}

/* ===== FAQ ===== */
.faq-section {
    background: var(--bg-primary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: all var(--transition-speed) ease;
}

.faq-item:hover {
    border-color: var(--accent-primary);
}

.faq-question {
    padding: 18px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition-speed) ease;
    user-select: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--accent-primary);
    transition: transform var(--transition-speed) ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 18px;
}

/* ===== HowTo ===== */
.howto-section {
    background: var(--bg-secondary);
}

.howto-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    padding: 40px;
}

.howto-content h3 {
    font-size: 1.2rem;
    color: var(--accent-primary);
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

.howto-content h3:first-child {
    margin-top: 0;
}

.howto-content p {
    font-size: 0.95rem;
    margin-bottom: 1em;
}

.howto-content ol {
    list-style: decimal;
    padding-left: 24px;
    margin-bottom: 1em;
}

.howto-content ol li {
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== 联系我们 ===== */
.contact-section {
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 30px;
    align-items: start;
}

.contact-info {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px;
}

.contact-info h3 {
    font-size: 1.3rem;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.contact-info p {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.contact-qr {
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    padding: 30px;
    transition: all var(--transition-speed) ease;
}

.contact-qr:hover {
    border-color: var(--accent-primary);
}

.contact-qr svg {
    margin: 0 auto 12px;
    border-radius: var(--border-radius-sm);
}

.contact-qr p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== 页脚 ===== */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 60px 0 30px;
}

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

.footer-about h3,
.footer-links h3,
.footer-sitemap h3,
.footer-legal h3 {
    font-size: 1.1rem;
    color: var(--accent-primary);
    margin-bottom: 16px;
}

.footer-about p {
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.footer-about p strong {
    color: var(--text-primary);
}

.footer-links ul,
.footer-sitemap ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links a,
.footer-sitemap a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-speed) ease;
}

.footer-links a:hover,
.footer-sitemap a:hover {
    color: var(--accent-primary);
}

.footer-legal p {
    font-size: 0.8rem;
    margin-bottom: 6px;
}

.footer-legal p strong {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== 返回顶部 ===== */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), #ffaa00);
    color: var(--bg-primary);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-speed) ease;
    z-index: 999;
}

#backToTop.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#backToTop:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.5);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    section {
        padding: 50px 0;
    }
    
    h2 {
        font-size: 1.6rem;
        white-space: normal;
    }
    
    .header-top span {
        display: none;
    }
    
    .search-box #searchInput {
        width: 120px;
    }
    
    .main-nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(13, 13, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 12px;
        border-bottom: 1px solid var(--glass-border);
    }
    
    .main-nav ul.open {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-banner {
        padding: 100px 0 50px;
    }
    
    .hero-banner .container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 0.95rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .culture-grid,
    .team-grid,
    .services-grid,
    .core-grid,
    .solutions-grid,
    .industries-grid,
    .cases-grid,
    .testimonials-grid,
    .recommend-grid,
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .howto-content {
        padding: 24px;
    }
    
    .faq-question {
        font-size: 0.9rem;
        padding: 14px 18px;
    }
    
    #backToTop {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .header-top {
        font-size: 0.75rem;
    }
    
    .search-box #searchInput {
        width: 100px;
        font-size: 0.75rem;
    }
    
    .hero-content h1 {
        font-size: 1.5rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .core-number {
        font-size: 2.5rem;
    }
}

/* ===== 暗黑模式（默认已暗） ===== */
body.light-mode {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --text-primary: #1a1a2e;
    --text-secondary: #555;
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
}

body.light-mode header {
    background: rgba(255, 255, 255, 0.95);
}

body.light-mode .hero-banner {
    background: linear-gradient(135deg, #e8e8f0 0%, #ffffff 40%, #f0f0ff 70%, #e0e0f0 100%);
}

body.light-mode .hero-banner::before {
    background: radial-gradient(circle at 30% 50%, rgba(233, 69, 96, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(255, 215, 0, 0.03) 0%, transparent 50%);
}

body.light-mode .breadcrumb {
    background: var(--bg-secondary);
}

body.light-mode .about-section,
body.light-mode .team-section,
body.light-mode .advantages-section,
body.light-mode .cases-section,
body.light-mode .news-section,
body.light-mode .hot-recommend-section,
body.light-mode .howto-section,
body.light-mode footer {
    background: var(--bg-secondary);
}

body.light-mode .culture-section,
body.light-mode .products-section,
body.light-mode .services-section,
body.light-mode .industries-section,
body.light-mode .testimonials-section,
body.light-mode .latest-articles-section,
body.light-mode .faq-section,
body.light-mode .contact-section,
body.light-mode .related-recommend-section,
body.light-mode .core-adv-section,
body.light-mode .solutions-section {
    background: var(--bg-primary);
}

body.light-mode .btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #e94560, #ff6b6b);
}

body.light-mode .btn-primary:hover {
    color: #fff;
}

body.light-mode .culture-card,
body.light-mode .team-card,
body.light-mode .product-card,
body.light-mode .advantage-card,
body.light-mode .service-card,
body.light-mode .core-card,
body.light-mode .solution-card,
body.light-mode .industry-card,
body.light-mode .case-card,
body.light-mode .testimonial-card,
body.light-mode .news-card,
body.light-mode .articles-grid article,
body.light-mode .recommend-card,
body.light-mode .related-card,
body.light-mode .faq-item,
body.light-mode .howto-content,
body.light-mode .contact-info,
body.light-mode .contact-qr {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-color: var(--glass-border);
}

/* ===== 动画与过渡增强 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-slider {
    animation: fadeInUp 0.8s ease 0.2s both;
}

/* ===== 性能优化 ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* ===== 辅助功能 ===== */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== 自定义滚动条 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}