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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e9f0 100%);
    color: #222;
    line-height: 1.8;
    font-size: 16px;
    transition: background 0.3s, color 0.3s;
    min-height: 100vh;
}

body.dark {
    background: linear-gradient(135deg, #121212 0%, #1a1a2e 100%);
    color: #e0e0e0;
}

a {
    color: #1a3a5c;
    text-decoration: none;
    transition: color 0.3s;
}

body.dark a {
    color: #8bb8e8;
}

a:hover {
    color: #c9a84c;
}

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

/* 导航栏 - 毛玻璃效果 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(26, 58, 92, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #fff;
    z-index: 1000;
    transition: background 0.3s, box-shadow 0.3s;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

body.dark .navbar {
    background: rgba(13, 31, 48, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

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

.logo {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo svg {
    width: 32px;
    height: 32px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    font-size: 15px;
}

.nav-links a {
    color: #fff;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: border 0.3s, transform 0.2s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #c9a84c;
    transition: width 0.3s;
}

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

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

.nav-toggle {
    display: none;
    background: none;
    border: 0;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    transition: transform 0.2s;
}

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

.search-box {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 20px;
    padding: 4px 12px;
    margin-left: 16px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: background 0.3s, border-color 0.3s;
}

.search-box:focus-within {
    background: rgba(255, 255, 255, 0.25);
    border-color: #c9a84c;
}

.search-box input {
    background: none;
    border: 0;
    color: #fff;
    outline: 0;
    width: 120px;
    font-size: 14px;
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.search-box button {
    background: none;
    border: 0;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    transition: transform 0.2s;
}

.search-box button:hover {
    transform: scale(1.15);
}

.dark-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    border-radius: 20px;
    padding: 4px 14px;
    cursor: pointer;
    font-size: 13px;
    margin-left: 12px;
    transition: background 0.3s, border-color 0.3s, transform 0.2s;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.dark-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: #c9a84c;
    transform: translateY(-1px);
}

/* 移动菜单 - 毛玻璃 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: rgba(26, 58, 92, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 16px 20px;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

body.dark .mobile-menu {
    background: rgba(13, 31, 48, 0.95);
}

.mobile-menu a {
    display: block;
    color: #fff;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: padding-left 0.2s, color 0.2s;
}

.mobile-menu a:hover {
    padding-left: 8px;
    color: #c9a84c;
}

.mobile-menu.show {
    display: block;
    animation: slideDown 0.3s ease;
}

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

/* 返回顶部 - 毛玻璃 */
.back-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    background: rgba(26, 58, 92, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
    font-size: 22px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    z-index: 999;
    display: none;
    transition: opacity 0.3s, transform 0.3s, background 0.3s;
}

body.dark .back-top {
    background: rgba(42, 74, 108, 0.85);
}

.back-top.show {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInUp 0.3s ease;
}

.back-top:hover {
    transform: translateY(-4px) scale(1.05);
    background: #1a3a5c;
}

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

/* Banner - 渐变背景 */
.banner {
    position: relative;
    margin-top: 64px;
    overflow: hidden;
    height: 480px;
    background: linear-gradient(135deg, #1a3a5c 0%, #2a5a7c 50%, #1a3a5c 100%);
}

body.dark .banner {
    background: linear-gradient(135deg, #0d1f30 0%, #1a2a4c 50%, #0d1f30 100%);
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(201, 168, 76, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    padding: 0 20px;
    text-align: center;
    color: #fff;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
    animation: fadeInDown 0.8s ease;
}

.banner-slide p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 24px;
    opacity: 0.9;
    text-shadow: 0 1px 6px rgba(0,0,0,0.3);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.banner-slide .btn {
    display: inline-block;
    background: linear-gradient(135deg, #c9a84c, #dbb85c);
    color: #1a3a5c;
    padding: 12px 36px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
    box-shadow: 0 4px 15px rgba(201, 168, 76, 0.4);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.banner-slide .btn:hover {
    background: linear-gradient(135deg, #dbb85c, #e8c86c);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 6px 20px rgba(201, 168, 76, 0.5);
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.banner-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(2px);
}

.banner-dots span.active {
    background: #c9a84c;
    width: 30px;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(201, 168, 76, 0.5);
}

.banner-dots span:hover {
    background: rgba(255, 255, 255, 0.7);
}

/* 面包屑 */
.breadcrumb {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 12px 0;
    border-bottom: 1px solid #eaeef2;
    font-size: 14px;
    color: #666;
}

body.dark .breadcrumb {
    background: rgba(30, 30, 30, 0.9);
    border-color: #333;
    color: #aaa;
}

.breadcrumb a {
    color: #1a3a5c;
}

body.dark .breadcrumb a {
    color: #8bb8e8;
}

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

.section-title h2 {
    font-size: 32px;
    color: #1a3a5c;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

body.dark .section-title h2 {
    color: #c9a84c;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #c9a84c, #dbb85c);
    margin: 10px auto 0;
    border-radius: 2px;
}

.section-title p {
    color: #666;
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

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

/* 各区块 */
section {
    padding: 64px 0;
}

.bg-white {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
}

body.dark .bg-white {
    background: rgba(26, 26, 26, 0.95);
}

.bg-light {
    background: rgba(245, 247, 250, 0.9);
    backdrop-filter: blur(4px);
}

body.dark .bg-light {
    background: rgba(30, 30, 30, 0.9);
}

/* 介绍 */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.intro-text h3 {
    font-size: 24px;
    color: #1a3a5c;
    margin-bottom: 20px;
}

body.dark .intro-text h3 {
    color: #c9a84c;
}

.intro-text p {
    margin-bottom: 16px;
    text-align: justify;
}

.intro-stats {
    display: flex;
    gap: 30px;
    margin-top: 24px;
}

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

.stat-item .num {
    font-size: 36px;
    font-weight: 700;
    color: #c9a84c;
    text-shadow: 0 2px 4px rgba(201, 168, 76, 0.2);
}

.stat-item .label {
    font-size: 14px;
    color: #666;
}

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

.intro-img svg {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.intro-img svg:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

/* 产品优势 - 毛玻璃卡片 */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 32px 24px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark .advantage-card {
    background: rgba(34, 34, 34, 0.85);
    border-color: rgba(255, 255, 255, 0.05);
}

.advantage-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 0.95);
}

body.dark .advantage-card:hover {
    background: rgba(50, 50, 50, 0.9);
}

.advantage-card svg {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.advantage-card h3 {
    font-size: 20px;
    color: #1a3a5c;
    margin-bottom: 10px;
}

body.dark .advantage-card h3 {
    color: #c9a84c;
}

.advantage-card p {
    color: #666;
    font-size: 15px;
}

body.dark .advantage-card p {
    color: #aaa;
}

/* 解决方案 - 圆角卡片 */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.solution-item {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border-left: 4px solid #c9a84c;
    transition: transform 0.3s, box-shadow 0.3s, background 0.3s;
}

body.dark .solution-item {
    background: rgba(34, 34, 34, 0.9);
}

.solution-item:hover {
    transform: translateX(4px) translateY(-2px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.98);
}

body.dark .solution-item:hover {
    background: rgba(50, 50, 50, 0.95);
}

.solution-item h3 {
    font-size: 20px;
    color: #1a3a5c;
    margin-bottom: 10px;
}

body.dark .solution-item h3 {
    color: #c9a84c;
}

.solution-item p {
    color: #555;
    font-size: 15px;
}

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

/* 案例 - 毛玻璃卡片 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark .case-card {
    background: rgba(34, 34, 34, 0.85);
    border-color: rgba(255, 255, 255, 0.05);
}

.case-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.case-card svg {
    width: 100%;
    height: 200px;
    transition: transform 0.3s;
}

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

.case-card .info {
    padding: 20px;
}

.case-card .info h3 {
    font-size: 18px;
    color: #1a3a5c;
    margin-bottom: 8px;
}

body.dark .case-card .info h3 {
    color: #c9a84c;
}

.case-card .info p {
    color: #666;
    font-size: 14px;
}

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

/* 评价 - 毛玻璃卡片 */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark .testimonial-card {
    background: rgba(34, 34, 34, 0.85);
    border-color: rgba(255, 255, 255, 0.05);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
}

.testimonial-card::before {
    content: '\201C';
    font-size: 48px;
    color: #c9a84c;
    position: absolute;
    top: 8px;
    left: 16px;
    opacity: 0.3;
    font-family: serif;
}

.testimonial-card p {
    font-style: italic;
    color: #555;
    margin-bottom: 16px;
    padding-left: 24px;
}

body.dark .testimonial-card p {
    color: #bbb;
}

.testimonial-card .author {
    font-weight: 600;
    color: #1a3a5c;
    padding-left: 24px;
}

body.dark .testimonial-card .author {
    color: #c9a84c;
}

/* 新闻文章 - 毛玻璃卡片 */
.article-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.article-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 24px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark .article-card {
    background: rgba(34, 34, 34, 0.85);
    border-color: rgba(255, 255, 255, 0.05);
}

.article-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
}

.article-card .date {
    font-size: 13px;
    color: #999;
    margin-bottom: 6px;
}

.article-card h3 {
    font-size: 18px;
    color: #1a3a5c;
    margin-bottom: 8px;
}

body.dark .article-card h3 {
    color: #c9a84c;
}

.article-card p {
    color: #666;
    font-size: 14px;
    margin-bottom: 12px;
}

body.dark .article-card p {
    color: #aaa;
}

.article-card .read-more {
    color: #c9a84c;
    font-weight: 600;
    font-size: 14px;
    transition: padding-left 0.2s;
}

.article-card .read-more:hover {
    padding-left: 4px;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid #eaeef2;
    padding: 18px 0;
    transition: background 0.2s;
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding-left: 8px;
    padding-right: 8px;
}

body.dark .faq-item {
    border-color: #333;
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    color: #1a3a5c;
    padding: 4px 0;
    transition: color 0.2s;
}

body.dark .faq-question {
    color: #c9a84c;
}

.faq-question:hover {
    color: #c9a84c;
}

.faq-question .icon {
    font-size: 20px;
    transition: transform 0.3s, color 0.2s;
}

.faq-item.open .faq-question .icon {
    transform: rotate(45deg);
    color: #c9a84c;
}

.faq-answer {
    padding-top: 12px;
    display: none;
    color: #555;
    font-size: 15px;
    line-height: 1.8;
}

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

.faq-item.open .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* HowTo - 毛玻璃卡片 */
.howto-box {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 36px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark .howto-box {
    background: rgba(34, 34, 34, 0.9);
    border-color: rgba(255, 255, 255, 0.05);
}

.howto-box h3 {
    font-size: 22px;
    color: #1a3a5c;
    margin-bottom: 16px;
}

body.dark .howto-box h3 {
    color: #c9a84c;
}

.howto-box ol {
    padding-left: 24px;
}

.howto-box ol li {
    margin-bottom: 12px;
    color: #555;
}

body.dark .howto-box ol li {
    color: #bbb;
}

.howto-box .note {
    background: linear-gradient(135deg, #fef9e7, #fdf5d6);
    padding: 16px;
    border-radius: 12px;
    margin-top: 20px;
    border-left: 4px solid #c9a84c;
}

body.dark .howto-box .note {
    background: linear-gradient(135deg, #2a2a1a, #3a3a2a);
}

.howto-box .note p {
    color: #555;
}

body.dark .howto-box .note p {
    color: #bbb;
}

/* 联系 - 毛玻璃卡片 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

body.dark .contact-info {
    background: rgba(34, 34, 34, 0.85);
    border-color: rgba(255, 255, 255, 0.05);
}

.contact-info h3 {
    font-size: 22px;
    color: #1a3a5c;
    margin-bottom: 20px;
}

body.dark .contact-info h3 {
    color: #c9a84c;
}

.contact-info p {
    margin-bottom: 10px;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.contact-info svg {
    width: 20px;
    height: 20px;
    fill: #c9a84c;
    flex-shrink: 0;
}

.contact-map svg {
    width: 100%;
    height: 300px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.contact-map svg:hover {
    transform: scale(1.02);
}

.contact-info a {
    transition: transform 0.2s, box-shadow 0.2s;
}

.contact-info a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* 友情链接 */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    padding: 16px 0;
}

.friend-links a {
    color: #555;
    font-size: 14px;
    padding: 6px 18px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border-radius: 20px;
    transition: background 0.3s, color 0.3s, transform 0.2s;
    border: 1px solid rgba(201, 168, 76, 0.1);
}

body.dark .friend-links a {
    background: rgba(42, 42, 42, 0.8);
    color: #aaa;
    border-color: rgba(255, 255, 255, 0.05);
}

.friend-links a:hover {
    background: linear-gradient(135deg, #c9a84c, #dbb85c);
    color: #1a3a5c;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(201, 168, 76, 0.3);
}

/* 页脚 - 毛玻璃效果 */
footer {
    background: rgba(26, 58, 92, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: #ccc;
    padding: 40px 0 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark footer {
    background: rgba(13, 31, 48, 0.95);
}

footer .container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 30px;
}

footer h4 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

footer h4::after {
    content: '';
    display: block;
    width: 30px;
    height: 2px;
    background: #c9a84c;
    margin-top: 4px;
}

footer a {
    color: #bbb;
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    transition: color 0.2s, padding-left 0.2s;
}

footer a:hover {
    color: #c9a84c;
    padding-left: 4px;
}

footer p {
    font-size: 14px;
    line-height: 1.8;
}

.footer-bottom {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    margin-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #999;
}

/* 滚动动画 */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 图片懒加载占位 */
.lazy-placeholder {
    background: linear-gradient(135deg, #eaeef2, #d5dce6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: #999;
    font-size: 14px;
}

body.dark .lazy-placeholder {
    background: linear-gradient(135deg, #2a2a2a, #3a3a3a);
    color: #666;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .intro-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .advantage-grid,
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    footer .container {
        grid-template-columns: 1fr 1fr;
    }
    
    .banner {
        height: 400px;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .search-box,
    .dark-toggle {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .banner-slide h1 {
        font-size: 28px;
    }
    
    .banner-slide p {
        font-size: 16px;
    }
    
    .banner {
        height: 360px;
    }
    
    .advantage-grid,
    .case-grid,
    .testimonial-grid,
    .article-grid {
        grid-template-columns: 1fr;
    }
    
    footer .container {
        grid-template-columns: 1fr;
    }
    
    .section-title h2 {
        font-size: 26px;
    }
    
    .back-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
    
    .intro-stats {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .stat-item .num {
        font-size: 28px;
    }
    
    .contact-info {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .banner-slide h1 {
        font-size: 24px;
    }
    
    .banner {
        height: 320px;
    }
    
    .advantage-card {
        padding: 24px 16px;
    }
    
    .solution-item {
        padding: 20px;
    }
    
    .howto-box {
        padding: 24px;
    }
}