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

:root {
    --primary: #1a3a5c;
    --accent: #f0c040;
    --accent-light: #f7d86a;
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --text: #1a2a3a;
    --text-light: #666;
    --border: #e0e7ef;
    --shadow: 0 2px 12px rgba(26, 58, 92, 0.08);
    --shadow-hover: 0 8px 30px rgba(26, 58, 92, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

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

/* ===== 导航栏（毛玻璃 + 渐变） ===== */
.sticky-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 20px rgba(26, 58, 92, 0.06);
    transition: box-shadow var(--transition), background var(--transition);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.5rem;
    flex-wrap: wrap;
}

.nav-logo {
    display: flex;
    align-items: center;
    transition: transform 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-logo img {
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.2rem;
    flex-wrap: wrap;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--primary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all var(--transition);
    position: relative;
    font-size: 0.95rem;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width var(--transition);
}

.nav-menu li a:hover {
    background: rgba(240, 192, 64, 0.12);
    color: #c9a030;
}

.nav-menu li a:hover::after {
    width: 60%;
}

.nav-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.6rem;
    color: var(--primary);
    padding: 0.2rem 0.5rem;
    border-radius: 8px;
    transition: background 0.2s;
}

.nav-toggle:hover {
    background: rgba(240, 192, 64, 0.15);
}

.nav-search form {
    display: flex;
    gap: 0.2rem;
    align-items: center;
}

.nav-search input {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    font-size: 0.9rem;
    width: 140px;
    transition: all var(--transition);
    outline: none;
}

.nav-search input:focus {
    width: 180px;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(240, 192, 64, 0.15);
}

.nav-search button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.9rem;
}

.nav-search button:hover {
    background: #2a4a6c;
    transform: scale(1.05);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    max-width: 1200px;
    margin: 0.8rem auto;
    padding: 0 1.5rem;
    font-size: 0.85rem;
    color: var(--text-light);
}

.breadcrumb span {
    background: rgba(255, 255, 255, 0.5);
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    backdrop-filter: blur(4px);
}

/* ===== Banner（渐变 + 毛玻璃 + 圆角） ===== */
.banner {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
    min-height: 380px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, #1a3a5c 0%, #2a5a7c 40%, #3a7a9c 100%);
    box-shadow: 0 8px 40px rgba(26, 58, 92, 0.2);
    display: flex;
    align-items: center;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(240, 192, 64, 0.08) 0%, transparent 60%),
                radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: bannerGlow 12s ease-in-out infinite alternate;
}

@keyframes bannerGlow {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(2%, 2%) rotate(3deg); }
}

.banner-slide {
    display: none;
    padding: 3.5rem 3rem;
    text-align: center;
    position: relative;
    z-index: 1;
    width: 100%;
    animation: fadeSlideIn 0.6s ease;
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.banner-slide.active {
    display: block;
}

.banner-content {
    max-width: 700px;
    margin: 0 auto;
}

.banner-content h1,
.banner-content h2 {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
    background: linear-gradient(135deg, #fff 60%, var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    letter-spacing: 0.02em;
}

.banner-content p {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 1.8rem;
    line-height: 1.6;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: var(--primary);
    padding: 0.7rem 2rem;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(240, 192, 64, 0.3);
    transition: all var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 25px rgba(240, 192, 64, 0.4);
}

.banner-indicators {
    position: absolute;
    bottom: 1.2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.6rem;
    z-index: 2;
}

.indicator {
    width: 14px;
    height: 14px;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.indicator.active {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.2);
    box-shadow: 0 0 12px rgba(240, 192, 64, 0.5);
}

.indicator:hover {
    background: rgba(240, 192, 64, 0.6);
}

/* ===== 通用 Section（毛玻璃卡片 + 圆角 + 滚动动画） ===== */
.section {
    max-width: 1200px;
    margin: 2.5rem auto;
    padding: 2rem 2rem;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    backdrop-filter: blur(2px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.section:hover {
    box-shadow: var(--shadow-hover);
}

.section h2 {
    color: var(--primary);
    border-bottom: 3px solid var(--accent);
    padding-bottom: 0.6rem;
    margin-bottom: 1.8rem;
    font-size: 1.7rem;
    font-weight: 700;
    display: inline-block;
    letter-spacing: 0.01em;
}

/* ===== 品牌介绍 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: #3a4a5a;
    line-height: 1.8;
}

.about-info {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4f8 100%);
    padding: 1.5rem 2rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.about-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(26, 58, 92, 0.06);
}

.about-info h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.about-info ul {
    list-style: none;
}

.about-info li {
    margin-bottom: 0.6rem;
    padding: 0.3rem 0;
    border-bottom: 1px dashed var(--border);
    display: flex;
    gap: 0.5rem;
}

.about-info li:last-child {
    border-bottom: none;
}

.about-info li strong {
    color: var(--primary);
    min-width: 100px;
}

/* ===== 主营产品 ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.8rem;
}

.product-card {
    text-align: center;
    padding: 1.5rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(26, 58, 92, 0.1);
    border-color: var(--accent);
}

.product-card img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 1rem;
    transition: transform 0.5s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.product-card:hover img {
    transform: scale(1.04);
}

.product-card h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}

.product-card p {
    color: var(--text-light);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* ===== 解决方案 ===== */
.solution-list {
    display: grid;
    gap: 1.2rem;
}

.solution-item {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4f8 100%);
    padding: 1.5rem 1.8rem;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--accent);
    transition: all var(--transition);
    cursor: default;
}

.solution-item:hover {
    transform: translateX(6px);
    box-shadow: 0 4px 20px rgba(240, 192, 64, 0.1);
}

.solution-item h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.solution-item p {
    color: #4a5a6a;
}

/* ===== 行业应用 ===== */
.industry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    list-style: none;
    margin-top: 1rem;
}

.industry-tags li {
    background: linear-gradient(135deg, #e8edf4 0%, #dde4ee 100%);
    padding: 0.5rem 1.2rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    transition: all var(--transition);
    border: 1px solid transparent;
    cursor: default;
}

.industry-tags li:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(240, 192, 64, 0.25);
    border-color: var(--accent);
}

/* ===== 客户案例 ===== */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.8rem;
}

.case-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.2rem;
    background: #fff;
    transition: all var(--transition);
    overflow: hidden;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(26, 58, 92, 0.08);
    border-color: var(--accent);
}

.case-card img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 0.8rem;
    transition: transform 0.5s ease;
}

.case-card:hover img {
    transform: scale(1.03);
}

.case-card h3 {
    color: var(--primary);
    margin-bottom: 0.4rem;
    font-size: 1.05rem;
}

.case-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== 客户评价 ===== */
blockquote {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4f8 100%);
    padding: 1.2rem 1.8rem;
    border-left: 4px solid var(--accent);
    margin: 1rem 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: all var(--transition);
    position: relative;
}

blockquote::before {
    content: '"';
    font-size: 3rem;
    color: var(--accent);
    position: absolute;
    top: -0.2rem;
    left: 0.8rem;
    opacity: 0.3;
    line-height: 1;
}

blockquote:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 16px rgba(240, 192, 64, 0.08);
}

blockquote p {
    font-style: italic;
    color: #3a4a5a;
    font-size: 1rem;
}

/* ===== 新闻中心 ===== */
.article-list article {
    margin-bottom: 1.5rem;
    padding: 1rem 1.2rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    border-bottom: 1px solid var(--border);
}

.article-list article:hover {
    background: rgba(240, 192, 64, 0.04);
    transform: translateX(4px);
}

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

.article-list h3 {
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
}

.article-list h3 a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

.article-list h3 a:hover {
    color: var(--accent);
}

.article-list time {
    color: #999;
    font-size: 0.82rem;
    display: block;
    margin-bottom: 0.3rem;
}

.article-list p {
    color: var(--text-light);
    font-size: 0.92rem;
    margin-bottom: 0.4rem;
}

.read-more {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.read-more:hover {
    color: var(--accent);
    gap: 0.6rem;
}

/* ===== FAQ ===== */
.faq-item {
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    padding: 1.2rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--primary);
    transition: all var(--transition);
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--accent);
    transition: transform var(--transition);
}

.faq-item.active .faq-question::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-question:hover {
    background: rgba(240, 192, 64, 0.06);
    padding-left: 1.3rem;
}

.faq-answer {
    display: none;
    padding: 0 1rem 1.2rem 1rem;
    color: #4a5a6a;
    line-height: 1.7;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.faq-item.active .faq-answer {
    display: block;
}

/* ===== HowTo ===== */
.howto-steps {
    padding-left: 1.8rem;
    margin: 1rem 0;
    counter-reset: step;
}

.howto-steps li {
    margin-bottom: 0.8rem;
    padding: 0.6rem 1rem 0.6rem 0.5rem;
    border-radius: 6px;
    transition: background 0.2s;
    list-style-type: decimal;
    line-height: 1.6;
}

.howto-steps li:hover {
    background: rgba(240, 192, 64, 0.06);
}

.howto-steps li strong {
    color: var(--primary);
}

/* ===== 联系我们 ===== */
.contact-info {
    background: linear-gradient(135deg, #f8fafc 0%, #f0f4f8 100%);
    padding: 1.5rem 2rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.contact-info p {
    margin-bottom: 0.5rem;
    padding: 0.3rem 0;
}

.contact-info p strong {
    color: var(--primary);
    min-width: 100px;
    display: inline-block;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    max-width: 500px;
    margin-top: 1rem;
}

.contact-form label {
    font-weight: 500;
    color: var(--primary);
    font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea {
    padding: 0.7rem 1rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    transition: all var(--transition);
    background: rgba(255, 255, 255, 0.8);
    outline: none;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(240, 192, 64, 0.12);
    background: #fff;
}

.contact-form button {
    background: linear-gradient(135deg, var(--primary), #2a5a7c);
    color: #fff;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition);
    align-self: flex-start;
}

.contact-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 58, 92, 0.25);
}

/* ===== Footer ===== */
footer {
    background: linear-gradient(135deg, #0f2a3f 0%, #1a3a5c 50%, #2a4a6c 100%);
    color: #d0d8e0;
    padding: 3rem 1.5rem 1.5rem;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent));
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links h4 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #b0bcc8;
    text-decoration: none;
    transition: all var(--transition);
    font-size: 0.92rem;
    padding: 0.2rem 0;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: #8a9aa8;
    margin-bottom: 0.3rem;
}

/* ===== 返回顶部 ===== */
#backToTop {
    position: fixed;
    bottom: 2.5rem;
    right: 2.5rem;
    background: linear-gradient(135deg, var(--primary), #2a5a7c);
    color: #fff;
    border: none;
    padding: 0.7rem 1rem;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    display: none;
    z-index: 999;
    box-shadow: 0 4px 16px rgba(26, 58, 92, 0.3);
    transition: all var(--transition);
    width: 48px;
    height: 48px;
    display: none;
    align-items: center;
    justify-content: center;
}

#backToTop:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(26, 58, 92, 0.4);
    background: var(--accent);
    color: var(--primary);
}

/* ===== 暗黑模式切换 ===== */
#darkModeToggle {
    position: fixed;
    bottom: 2.5rem;
    left: 2.5rem;
    background: linear-gradient(135deg, var(--primary), #2a5a7c);
    color: #fff;
    border: none;
    padding: 0.7rem;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 4px 16px rgba(26, 58, 92, 0.3);
    transition: all var(--transition);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#darkModeToggle:hover {
    transform: translateY(-4px) rotate(15deg);
    box-shadow: 0 8px 25px rgba(26, 58, 92, 0.4);
}

/* ===== 暗黑模式 ===== */
body.dark-mode {
    --bg: #121212;
    --card-bg: #1e1e1e;
    --text: #e0e0e0;
    --text-light: #a0a0a0;
    --border: #333;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.4);
    --glass-bg: rgba(30, 30, 30, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
}

body.dark-mode .section {
    background: var(--card-bg);
    border-color: rgba(255, 255, 255, 0.03);
}

body.dark-mode .sticky-nav {
    background: rgba(30, 30, 30, 0.75);
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

body.dark-mode .nav-menu li a {
    color: #d0d8e0;
}

body.dark-mode .nav-menu li a:hover {
    background: rgba(240, 192, 64, 0.1);
}

body.dark-mode .breadcrumb span {
    background: rgba(255, 255, 255, 0.05);
}

body.dark-mode .product-card,
body.dark-mode .case-card {
    background: #252525;
    border-color: #333;
}

body.dark-mode .product-card p,
body.dark-mode .case-card p {
    color: #b0b0b0;
}

body.dark-mode .industry-tags li {
    background: #2a2a2a;
    color: #d0d8e0;
}

body.dark-mode .industry-tags li:hover {
    background: var(--accent);
    color: var(--primary);
}

body.dark-mode blockquote {
    background: #252525;
}

body.dark-mode .about-info {
    background: #252525;
    border-color: #333;
}

body.dark-mode .about-info li {
    border-bottom-color: #333;
}

body.dark-mode .about-text p {
    color: #c0c8d0;
}

body.dark-mode .solution-item {
    background: #252525;
}

body.dark-mode .solution-item p {
    color: #b0b8c0;
}

body.dark-mode .contact-info {
    background: #252525;
    border-color: #333;
}

body.dark-mode .contact-form input,
body.dark-mode .contact-form textarea {
    background: #2a2a2a;
    border-color: #444;
    color: #e0e0e0;
}

body.dark-mode .contact-form input:focus,
body.dark-mode .contact-form textarea:focus {
    border-color: var(--accent);
    background: #333;
}

body.dark-mode .article-list article:hover {
    background: rgba(240, 192, 64, 0.03);
}

body.dark-mode .faq-question:hover {
    background: rgba(240, 192, 64, 0.05);
}

body.dark-mode .faq-answer {
    color: #b0b8c0;
}

body.dark-mode .howto-steps li:hover {
    background: rgba(240, 192, 64, 0.05);
}

body.dark-mode footer {
    background: linear-gradient(135deg, #0a0a0a 0%, #151515 50%, #1a1a1a 100%);
}

body.dark-mode .footer-links a {
    color: #8a9aa8;
}

body.dark-mode .footer-bottom p {
    color: #6a7a88;
}

body.dark-mode .banner {
    background: linear-gradient(135deg, #0f1a2a 0%, #1a2a3a 40%, #2a3a4a 100%);
}

/* ===== 滚动动画 ===== */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-grid {
        gap: 1.5rem;
    }
    
    .banner-content h1,
    .banner-content h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background: var(--glass-bg);
        backdrop-filter: blur(16px);
        padding: 1rem 0;
        border-radius: 12px;
        margin-top: 0.5rem;
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.open {
        display: flex;
    }
    
    .nav-menu li a {
        padding: 0.7rem 1.5rem;
        border-radius: 0;
    }
    
    .nav-menu li a::after {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .banner {
        min-height: 300px;
        border-radius: 0;
    }
    
    .banner-slide {
        padding: 2.5rem 1.5rem;
    }
    
    .banner-content h1,
    .banner-content h2 {
        font-size: 1.6rem;
    }
    
    .banner-content p {
        font-size: 1rem;
    }
    
    .section {
        margin: 1.5rem 0.8rem;
        padding: 1.5rem 1rem;
        border-radius: 12px;
    }
    
    .section h2 {
        font-size: 1.4rem;
    }
    
    .product-grid,
    .case-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }
    
    .nav-search input {
        width: 100px;
    }
    
    .nav-search input:focus {
        width: 140px;
    }
    
    #backToTop {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }
    
    #darkModeToggle {
        bottom: 1.5rem;
        left: 1.5rem;
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: 1.2rem;
    }
    
    .contact-form {
        max-width: 100%;
    }
    
    .about-info li {
        flex-direction: column;
    }
    
    .about-info li strong {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .nav-inner {
        padding: 0.5rem 0.8rem;
    }
    
    .nav-search input {
        width: 80px;
        font-size: 0.8rem;
    }
    
    .nav-search input:focus {
        width: 110px;
    }
    
    .banner-slide {
        padding: 2rem 1rem;
    }
    
    .banner-content h1,
    .banner-content h2 {
        font-size: 1.3rem;
    }
    
    .banner-content p {
        font-size: 0.9rem;
    }
    
    .btn {
        padding: 0.5rem 1.4rem;
        font-size: 0.9rem;
    }
    
    .section {
        padding: 1.2rem 0.8rem;
        margin: 1rem 0.5rem;
    }
    
    .product-card,
    .case-card {
        padding: 1rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem 1rem;
    }
    
    .footer-links li {
        margin-bottom: 0.2rem;
    }
    
    .breadcrumb {
        padding: 0 0.8rem;
    }
    
    .industry-tags {
        justify-content: center;
    }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary), #2a5a7c);
    border-radius: 4px;
}

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

/* ===== 选中文本 ===== */
::selection {
    background: var(--accent);
    color: var(--primary);
}