/* 全局重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #f0f4ff 0%, #fbe9e7 50%, #e8f5e9 100%);
    background-attachment: fixed;
    color: #1a1a2e;
    line-height: 1.8;
    font-size: 16px;
    transition: background 0.3s, color 0.3s;
    min-height: 100vh;
}

body.dark {
    background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #0f0f1a 100%);
    background-attachment: fixed;
    color: #e0e0e0;
}

a {
    color: #6C63FF;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    text-decoration: underline;
    color: #5A52D5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航吸顶 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
    transition: background 0.3s, border-color 0.3s;
    box-shadow: 0 2px 20px rgba(108, 99, 255, 0.08);
}

body.dark .navbar {
    background: rgba(26, 26, 46, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(45, 45, 68, 0.5);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #6C63FF, #FF6584);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.logo span {
    background: none;
    -webkit-text-fill-color: #1a1a2e;
    color: #1a1a2e;
}

body.dark .logo span {
    -webkit-text-fill-color: #e0e0e0;
    color: #e0e0e0;
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
}

.nav-links a {
    font-size: 15px;
    color: #1a1a2e;
    font-weight: 500;
    transition: color 0.2s, transform 0.2s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #6C63FF, #FF6584);
    transition: width 0.3s;
    border-radius: 2px;
}

.nav-links a:hover {
    color: #6C63FF;
    transform: translateY(-1px);
}

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

body.dark .nav-links a {
    color: #ccc;
}

body.dark .nav-links a:hover {
    color: #FF6584;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-box {
    display: flex;
    align-items: center;
    background: rgba(241, 243, 245, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 4px 12px;
    transition: background 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(108, 99, 255, 0.1);
}

.search-box:focus-within {
    box-shadow: 0 0 0 2px rgba(108, 99, 255, 0.2);
    background: rgba(241, 243, 245, 0.95);
}

body.dark .search-box {
    background: rgba(45, 45, 68, 0.8);
    border-color: rgba(255, 101, 132, 0.2);
}

body.dark .search-box:focus-within {
    box-shadow: 0 0 0 2px rgba(255, 101, 132, 0.2);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    padding: 6px 8px;
    font-size: 14px;
    width: 160px;
    color: #1a1a2e;
}

body.dark .search-box input {
    color: #e0e0e0;
}

.search-box input::placeholder {
    color: #999;
}

.search-box button {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #6C63FF;
    transition: transform 0.2s;
}

.search-box button:hover {
    transform: scale(1.1);
}

.dark-toggle {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(229, 231, 235, 0.5);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.dark-toggle:hover {
    transform: rotate(20deg) scale(1.1);
    background: rgba(255, 255, 255, 0.8);
}

body.dark .dark-toggle {
    border-color: rgba(85, 85, 85, 0.5);
    color: #f0c040;
    background: rgba(30, 30, 50, 0.6);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: #1a1a2e;
    transition: 0.3s;
    border-radius: 2px;
}

body.dark .hamburger span {
    background: #e0e0e0;
}

.hamburger:hover span {
    background: #6C63FF;
}

/* 移动菜单 */
.mobile-menu {
    display: none;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 16px 20px;
    border-top: 1px solid rgba(229, 231, 235, 0.5);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body.dark .mobile-menu {
    background: rgba(26, 26, 46, 0.95);
    border-color: rgba(45, 45, 68, 0.5);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 10px 0;
    font-size: 15px;
    border-bottom: 1px solid rgba(240, 240, 240, 0.5);
    color: #1a1a2e;
    transition: color 0.2s, padding-left 0.2s;
}

.mobile-menu a:hover {
    color: #6C63FF;
    padding-left: 8px;
}

body.dark .mobile-menu a {
    color: #ccc;
    border-color: rgba(45, 45, 68, 0.5);
}

body.dark .mobile-menu a:hover {
    color: #FF6584;
}

/* Banner轮播 */
.banner {
    position: relative;
    overflow: hidden;
    height: 420px;
    margin: 20px 0;
    border-radius: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 32px rgba(108, 99, 255, 0.15);
}

body.dark .banner {
    background: linear-gradient(135deg, #1a1a3e 0%, #2d1b4e 100%);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.banner-slides {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 100%;
}

.banner-slide {
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    flex-direction: column;
    text-align: center;
    position: relative;
}

.banner-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 20px;
}

.banner-slide h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

body.dark .banner-slide h2 {
    color: #f0f0f0;
}

.banner-slide p {
    font-size: 18px;
    max-width: 600px;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

body.dark .banner-slide p {
    color: rgba(224, 224, 240, 0.9);
}

.banner-btn {
    display: inline-block;
    margin-top: 24px;
    padding: 12px 32px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
    z-index: 1;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.banner-btn:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    text-decoration: none;
    color: #fff;
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 2;
}

.banner-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s;
}

.banner-dot.active {
    background: #fff;
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 20px;
    cursor: pointer;
    color: #fff;
    transition: all 0.3s;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

body.dark .banner-prev,
body.dark .banner-next {
    background: rgba(30, 30, 50, 0.6);
    border-color: rgba(85, 85, 85, 0.3);
    color: #e0e0e0;
}

body.dark .banner-prev:hover,
body.dark .banner-next:hover {
    background: rgba(30, 30, 50, 0.8);
}

.banner-prev {
    left: 16px;
}

.banner-next {
    right: 16px;
}

/* 通用标题 */
.section-title {
    text-align: center;
    margin: 48px 0 32px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #6C63FF, #FF6584);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title p {
    color: #6b7280;
    font-size: 16px;
}

body.dark .section-title p {
    color: #999;
}

/* 品牌/简介 */
.brand-intro {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    padding: 40px;
    margin: 20px 0;
    box-shadow: 0 4px 24px rgba(108, 99, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark .brand-intro {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-color: rgba(45, 45, 68, 0.3);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.brand-intro h1 {
    font-size: 38px;
    font-weight: 700;
    background: linear-gradient(135deg, #6C63FF, #FF6584);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.brand-intro .h1-sub {
    font-size: 20px;
    color: #4a5568;
    margin-bottom: 24px;
}

body.dark .brand-intro .h1-sub {
    color: #b0b0c0;
}

.brand-intro p {
    font-size: 16px;
    margin-bottom: 12px;
    text-indent: 2em;
    color: #374151;
}

body.dark .brand-intro p {
    color: #c0c0d0;
}

.brand-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 24px;
    background: rgba(248, 249, 252, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid rgba(108, 99, 255, 0.05);
}

body.dark .brand-info-grid {
    background: rgba(37, 37, 64, 0.8);
    border-color: rgba(255, 101, 132, 0.05);
}

.brand-info-item {
    font-size: 14px;
    color: #4a5568;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

.brand-info-item:hover {
    background: rgba(108, 99, 255, 0.05);
}

body.dark .brand-info-item {
    color: #b0b0c0;
}

body.dark .brand-info-item:hover {
    background: rgba(255, 101, 132, 0.05);
}

.brand-info-item strong {
    color: #1a1a2e;
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
}

body.dark .brand-info-item strong {
    color: #e0e0e0;
}

/* 产品/服务网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin: 20px 0;
}

.product-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.06);
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
    cursor: default;
}

body.dark .product-card {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(45, 45, 68, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(108, 99, 255, 0.12);
    border-color: rgba(108, 99, 255, 0.2);
}

body.dark .product-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 101, 132, 0.2);
}

.product-card svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    transition: transform 0.3s;
}

.product-card:hover svg {
    transform: scale(1.1) rotate(-5deg);
}

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1a1a2e;
}

body.dark .product-card h3 {
    color: #e0e0e0;
}

.product-card p {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.7;
}

body.dark .product-card p {
    color: #999;
}

/* 解决方案 */
.solution-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.solution-item {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 24px;
    border-left: 4px solid;
    border-image: linear-gradient(180deg, #6C63FF, #FF6584) 1;
    transition: all 0.3s;
    box-shadow: 0 4px 16px rgba(108, 99, 255, 0.04);
}

body.dark .solution-item {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.solution-item:hover {
    transform: translateX(4px);
    box-shadow: 0 6px 24px rgba(108, 99, 255, 0.1);
}

body.dark .solution-item:hover {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
}

.solution-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #1a1a2e;
}

body.dark .solution-item h3 {
    color: #e0e0e0;
}

.solution-item p {
    font-size: 14px;
    color: #6b7280;
}

body.dark .solution-item p {
    color: #999;
}

/* 案例/评价 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.case-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 16px rgba(108, 99, 255, 0.04);
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark .case-card {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(45, 45, 68, 0.3);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(108, 99, 255, 0.1);
}

body.dark .case-card:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.case-card h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: #6C63FF;
}

body.dark .case-card h4 {
    color: #FF6584;
}

.case-card p {
    font-size: 14px;
    color: #6b7280;
}

body.dark .case-card p {
    color: #999;
}

.case-card .author {
    font-size: 12px;
    color: #aaa;
    margin-top: 12px;
}

/* 文章列表 */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.article-item {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark .article-item {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(45, 45, 68, 0.3);
}

.article-item:hover {
    box-shadow: 0 8px 32px rgba(108, 99, 255, 0.1);
    transform: translateY(-2px);
}

body.dark .article-item:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.article-item .date {
    font-size: 12px;
    color: #aaa;
    margin-bottom: 8px;
}

.article-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
    line-height: 1.4;
    color: #1a1a2e;
}

body.dark .article-item h3 {
    color: #e0e0e0;
}

.article-item p {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 12px;
}

body.dark .article-item p {
    color: #999;
}

.article-item .read-more {
    color: #6C63FF;
    font-weight: 600;
    font-size: 14px;
    transition: color 0.2s, gap 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.article-item .read-more:hover {
    color: #FF6584;
    gap: 8px;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 20px auto;
}

.faq-item {
    border: 1px solid rgba(229, 231, 235, 0.5);
    border-radius: 16px;
    margin-bottom: 12px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all 0.3s;
}

body.dark .faq-item {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-color: rgba(45, 45, 68, 0.3);
}

.faq-item:hover {
    border-color: rgba(108, 99, 255, 0.2);
    box-shadow: 0 4px 16px rgba(108, 99, 255, 0.06);
}

body.dark .faq-item:hover {
    border-color: rgba(255, 101, 132, 0.2);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    transition: background 0.2s;
    color: #1a1a2e;
}

body.dark .faq-question {
    color: #e0e0e0;
}

.faq-question:hover {
    background: rgba(248, 249, 252, 0.8);
}

body.dark .faq-question:hover {
    background: rgba(37, 37, 64, 0.8);
}

.faq-question .icon {
    font-size: 20px;
    transition: transform 0.3s;
    color: #6C63FF;
}

body.dark .faq-question .icon {
    color: #FF6584;
}

.faq-item.active .faq-question .icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px 16px;
    font-size: 15px;
    color: #4a5568;
    display: none;
    line-height: 1.8;
    animation: fadeIn 0.3s ease;
}

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

body.dark .faq-answer {
    color: #b0b0c0;
}

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

/* HowTo */
.howto-section {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    padding: 40px;
    margin: 20px 0;
    box-shadow: 0 4px 24px rgba(108, 99, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

body.dark .howto-section {
    background: rgba(26, 26, 46, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-color: rgba(45, 45, 68, 0.3);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.howto-section ol,
.howto-section ul {
    margin-left: 20px;
    margin-bottom: 16px;
}

.howto-section li {
    margin-bottom: 8px;
    font-size: 15px;
    color: #374151;
}

body.dark .howto-section li {
    color: #c0c0d0;
}

.howto-section h3 {
    margin-top: 24px;
    margin-bottom: 12px;
    font-size: 20px;
    color: #1a1a2e;
    font-weight: 600;
}

body.dark .howto-section h3 {
    color: #e0e0e0;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 20px 0;
    background: rgba(248, 249, 252, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 24px;
    border-radius: 20px;
    border: 1px solid rgba(108, 99, 255, 0.05);
}

body.dark .contact-grid {
    background: rgba(37, 37, 64, 0.8);
    border-color: rgba(255, 101, 132, 0.05);
}

.contact-item {
    font-size: 14px;
    color: #4a5568;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

.contact-item:hover {
    background: rgba(108, 99, 255, 0.05);
}

body.dark .contact-item {
    color: #b0b0c0;
}

body.dark .contact-item:hover {
    background: rgba(255, 101, 132, 0.05);
}

.contact-item strong {
    color: #1a1a2e;
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
}

body.dark .contact-item strong {
    color: #e0e0e0;
}

/* 底部 */
footer {
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #b0b0c0;
    padding: 40px 0;
    margin-top: 40px;
    border-top: 1px solid rgba(45, 45, 68, 0.3);
}

body.dark footer {
    background: rgba(10, 10, 20, 0.95);
}

footer .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
}

footer h4 {
    color: #fff;
    margin-bottom: 12px;
    font-size: 16px;
    font-weight: 600;
}

footer a {
    color: #b0b0c0;
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    transition: color 0.2s, padding-left 0.2s;
}

footer a:hover {
    color: #fff;
    padding-left: 4px;
    text-decoration: none;
}

footer .copyright {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(45, 45, 68, 0.3);
    font-size: 13px;
    margin-top: 24px;
    color: #888;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background: rgba(108, 99, 255, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    border: none;
    z-index: 99;
    box-shadow: 0 4px 16px rgba(108, 99, 255, 0.2);
}

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

.back-to-top:hover {
    background: rgba(108, 99, 255, 1);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(108, 99, 255, 0.3);
}

body.dark .back-to-top {
    background: rgba(255, 101, 132, 0.8);
    box-shadow: 0 4px 16px rgba(255, 101, 132, 0.2);
}

body.dark .back-to-top:hover {
    background: rgba(255, 101, 132, 1);
    box-shadow: 0 8px 24px rgba(255, 101, 132, 0.3);
}

/* 滚动动画 */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 面包屑 */
.breadcrumb {
    font-size: 13px;
    color: #999;
    padding: 12px 0;
    margin-bottom: 8px;
}

.breadcrumb a {
    color: #6C63FF;
}

.breadcrumb span {
    color: #6b7280;
}

/* 数字动画 */
.stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
    padding: 24px;
    background: rgba(248, 249, 252, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 20px;
    border: 1px solid rgba(108, 99, 255, 0.05);
}

body.dark .stats {
    background: rgba(37, 37, 64, 0.8);
    border-color: rgba(255, 101, 132, 0.05);
}

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

.stat-number {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, #6C63FF, #FF6584);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: #6b7280;
    margin-top: 4px;
}

body.dark .stat-label {
    color: #999;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .search-box input {
        width: 100px;
    }
    .banner {
        height: 300px;
        border-radius: 16px;
    }
    .banner-slide h2 {
        font-size: 26px;
    }
    .banner-slide p {
        font-size: 15px;
    }
    .brand-intro h1 {
        font-size: 28px;
    }
    .section-title h2 {
        font-size: 26px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    .navbar .container {
        height: 56px;
    }
    .brand-intro {
        padding: 24px;
    }
    .howto-section {
        padding: 24px;
    }
    .banner-prev,
    .banner-next {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    .banner-prev {
        left: 8px;
    }
    .banner-next {
        right: 8px;
    }
}

@media (max-width: 480px) {
    .banner {
        height: 240px;
        border-radius: 12px;
    }
    .banner-slide h2 {
        font-size: 22px;
    }
    .banner-slide p {
        font-size: 14px;
    }
    .brand-intro {
        padding: 16px;
    }
    .brand-intro h1 {
        font-size: 24px;
    }
    .section-title h2 {
        font-size: 22px;
    }
    .product-grid {
        gap: 16px;
    }
    .product-card {
        padding: 20px;
    }
    .stats {
        padding: 16px;
        gap: 12px;
    }
    .stat-number {
        font-size: 28px;
    }
    .search-box input {
        width: 80px;
    }
    .howto-section {
        padding: 16px;
    }
}