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

:root {
    --primary: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #4fc3f7;
    --accent: #ff6f00;
    --bg: #ffffff;
    --bg-alt: #f5f7fa;
    --text: #1a1a2e;
    --text-light: #555;
    --glass: rgba(255, 255, 255, 0.7);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius: 20px;
    --transition: 0.3s ease;
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--primary-light));
    --gradient-accent: linear-gradient(135deg, var(--accent), #ffb300);
    --gradient-dark: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

[data-theme="dark"] {
    --bg: #0a0f1e;
    --bg-alt: #111827;
    --text: #e5e7eb;
    --text-light: #9ca3af;
    --glass: rgba(15, 23, 42, 0.8);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

/* ===== 基础样式 ===== */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 头部导航 ===== */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background var(--transition), border-color var(--transition);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: default;
    user-select: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    position: relative;
}

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

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

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

.theme-toggle,
.search-toggle,
.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--text);
    font-size: 1.2rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover,
.search-toggle:hover,
.menu-toggle:hover {
    background: rgba(26, 115, 232, 0.1);
    transform: scale(1.05);
}

.menu-toggle {
    display: none;
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    z-index: 2000;
    padding: 80px 24px;
    flex-direction: column;
    gap: 20px;
    animation: fadeInMobile 0.3s ease;
}

@keyframes fadeInMobile {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

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

.mobile-menu a {
    font-size: 1.5rem;
    text-decoration: none;
    color: var(--text);
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.mobile-menu a:hover {
    color: var(--primary);
    padding-left: 8px;
}

.mobile-close {
    position: absolute;
    top: 20px;
    right: 24px;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text);
    transition: var(--transition);
}

.mobile-close:hover {
    transform: rotate(90deg);
}

/* ===== 搜索模态框 ===== */
.search-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    justify-content: center;
    align-items: center;
    animation: fadeInModal 0.3s ease;
}

@keyframes fadeInModal {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.search-modal input {
    width: 80%;
    max-width: 600px;
    padding: 16px 24px;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    background: var(--bg);
    color: var(--text);
    box-shadow: var(--shadow);
    outline: 2px solid transparent;
    transition: var(--transition);
}

.search-modal input:focus {
    outline-color: var(--primary);
    transform: scale(1.02);
}

.search-modal .close-search {
    position: absolute;
    top: 20px;
    right: 24px;
    background: none;
    border: none;
    font-size: 2rem;
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.search-modal .close-search:hover {
    transform: rotate(90deg);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 100px 0 0;
    background: var(--bg-alt);
}

.breadcrumb ul {
    list-style: none;
    display: flex;
    gap: 8px;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

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

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin-left: 8px;
    color: var(--text-light);
}

/* ===== Hero 区域 ===== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(26, 115, 232, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(79, 195, 247, 0.05) 0%, transparent 50%);
    pointer-events: none;
    animation: heroGlow 10s ease-in-out infinite alternate;
}

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

.hero-slider {
    position: relative;
}

.hero-slide {
    display: none;
    animation: fadeIn 0.8s ease;
}

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

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

.hero-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 32px;
    max-width: 500px;
}

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

.btn {
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.5);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

.hero-visual {
    flex: 1;
}

.hero-visual svg {
    width: 100%;
    height: auto;
    max-width: 550px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.slider-controls {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 40px;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-light);
    cursor: pointer;
    border: none;
    transition: var(--transition);
    opacity: 0.5;
}

.slider-dot.active {
    background: var(--primary);
    transform: scale(1.3);
    opacity: 1;
}

.slider-dot:hover {
    opacity: 0.8;
    transform: scale(1.1);
}

/* ===== 通用章节 ===== */
section {
    padding: 80px 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 48px;
    font-size: 1.1rem;
}

/* ===== 品牌介绍 ===== */
.brand-intro {
    background: var(--bg-alt);
}

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

.brand-visual svg {
    width: 100%;
    max-width: 500px;
    animation: float 6s ease-in-out infinite;
}

.brand-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.brand-text p {
    color: var(--text-light);
    margin-bottom: 16px;
}

/* ===== 品牌故事 ===== */
.brand-story {
    background: var(--bg);
}

.story-timeline {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.story-item {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    padding: 24px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.story-item:hover {
    transform: translateX(8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.story-year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    min-width: 80px;
}

.story-desc h4 {
    margin-bottom: 8px;
}

.story-desc p {
    color: var(--text-light);
}

/* ===== 企业文化 ===== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.culture-card {
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.culture-card svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
}

.culture-card h3 {
    margin-bottom: 12px;
}

.culture-card p {
    color: var(--text-light);
}

/* ===== 团队介绍 ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.team-card {
    text-align: center;
    padding: 24px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.team-card svg {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin-bottom: 16px;
    transition: var(--transition);
}

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

.team-card h4 {
    margin-bottom: 4px;
}

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

/* ===== 产品中心 ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.product-card {
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

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

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.product-card svg {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    transition: var(--transition);
}

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

.product-card h3 {
    margin-bottom: 8px;
}

.product-card p {
    color: var(--text-light);
}

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

.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.adv-card {
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.adv-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.adv-card svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    transition: var(--transition);
}

.adv-card:hover svg {
    transform: scale(1.1) rotate(10deg);
}

.adv-card h3 {
    margin-bottom: 12px;
}

.adv-card p {
    color: var(--text-light);
}

/* ===== 解决方案 ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.solution-card {
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.solution-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.05;
    transform: translate(30%, 30%);
    transition: var(--transition);
}

.solution-card:hover::after {
    transform: translate(30%, 30%) scale(2);
    opacity: 0.1;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.solution-card h3 {
    margin-bottom: 12px;
}

.solution-card p {
    color: var(--text-light);
}

/* ===== 行业应用 ===== */
.industry-app {
    background: var(--bg-alt);
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.industry-card {
    padding: 32px;
    text-align: center;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.industry-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.industry-card svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    transition: var(--transition);
}

.industry-card:hover svg {
    transform: scale(1.1) rotate(360deg);
}

/* ===== 统计数据 ===== */
.stats {
    background: var(--gradient-dark);
    color: white;
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.9;
}

/* ===== 客户案例 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.case-card {
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.case-card h3 {
    margin-bottom: 8px;
}

.case-card p {
    color: var(--text-light);
}

/* ===== 合作客户 ===== */
.partners {
    background: var(--bg-alt);
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 24px;
    align-items: center;
}

.partner-grid svg {
    width: 100%;
    max-width: 120px;
    height: auto;
    margin: 0 auto;
    display: block;
    opacity: 0.7;
    transition: var(--transition);
}

.partner-grid svg:hover {
    opacity: 1;
    transform: scale(1.05);
}

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

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.testimonial-card {
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 16px;
    left: 24px;
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.2;
    font-family: serif;
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 16px;
    color: var(--text-light);
    position: relative;
    z-index: 1;
}

.testimonial-card h4 {
    font-weight: 600;
}

/* ===== 新闻资讯 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.news-card {
    padding: 24px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.news-card .date {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.news-card h3 {
    margin-bottom: 8px;
}

.news-card p {
    color: var(--text-light);
}

.related-articles {
    background: var(--bg-alt);
}

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

.faq-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    cursor: pointer;
    transition: var(--transition);
}

.faq-item:hover {
    padding-left: 8px;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
}

.faq-question span {
    transition: transform 0.3s;
    font-size: 0.8rem;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    color: var(--text-light);
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-top: 16px;
}

/* ===== 使用指南 ===== */
.howto-section {
    background: var(--bg-alt);
}

.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.step {
    text-align: center;
    padding: 32px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.step:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.step .number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 16px;
    transition: var(--transition);
}

.step:hover .number {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.4);
}

.step h4 {
    margin-bottom: 8px;
}

.step p {
    color: var(--text-light);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info h3 {
    margin-bottom: 16px;
}

.contact-info p {
    margin-bottom: 8px;
    color: var(--text-light);
}

.contact-info .info-item {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 16px;
    transition: var(--transition);
}

.contact-info .info-item:hover {
    transform: translateX(4px);
}

.contact-info svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    margin-bottom: 16px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
    transition: var(--transition);
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.contact-form textarea {
    height: 120px;
    resize: vertical;
}

.contact-form button {
    width: 100%;
}

/* ===== 友情链接 ===== */
.friend-links {
    background: var(--bg-alt);
}

.friend-links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.friend-links-grid a {
    color: var(--text-light);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}

.friend-links-grid a:hover {
    color: var(--primary);
    background: rgba(26, 115, 232, 0.1);
    transform: translateY(-2px);
}

/* ===== 网站地图 ===== */
.sitemap {
    background: var(--bg);
}

.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 24px;
}

.sitemap-col h4 {
    margin-bottom: 12px;
}

.sitemap-col a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 8px;
    transition: var(--transition);
    padding: 4px 0;
}

.sitemap-col a:hover {
    color: var(--primary);
    padding-left: 4px;
}

/* ===== 页脚 ===== */
footer {
    background: var(--bg-alt);
    padding: 48px 0 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

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

.footer-brand .logo {
    margin-bottom: 16px;
    display: inline-block;
}

.footer-brand p {
    color: var(--text-light);
    margin-bottom: 16px;
}

.footer-links h4 {
    margin-bottom: 16px;
}

.footer-links a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 8px;
    transition: var(--transition);
    padding: 4px 0;
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.footer-bottom a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 16px;
    transition: var(--transition);
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.4);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
    transition: var(--transition);
}

.back-to-top.visible {
    display: flex;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 115, 232, 0.5);
}

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

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

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-text h1 {
        font-size: 2.8rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .hero-text p {
        margin: 0 auto 32px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .brand-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .brand-visual svg {
        max-width: 350px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .story-item {
        flex-direction: column;
    }
    
    .story-year {
        min-width: auto;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .hero-text p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 28px;
        font-size: 0.9rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-bottom a {
        margin: 0 8px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .culture-grid,
    .adv-grid,
    .industry-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 暗色模式适配 ===== */
[data-theme="dark"] .glass-card {
    background: rgba(15, 23, 42, 0.8);
}

[data-theme="dark"] .faq-item {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .contact-form input,
[data-theme="dark"] .contact-form textarea {
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(15, 23, 42, 0.6);
}

[data-theme="dark"] .friend-links-grid a {
    background: rgba(15, 23, 42, 0.6);
}

[data-theme="dark"] .story-item,
[data-theme="dark"] .culture-card,
[data-theme="dark"] .team-card,
[data-theme="dark"] .product-card,
[data-theme="dark"] .adv-card,
[data-theme="dark"] .solution-card,
[data-theme="dark"] .industry-card,
[data-theme="dark"] .case-card,
[data-theme="dark"] .testimonial-card,
[data-theme="dark"] .news-card,
[data-theme="dark"] .step {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* ===== 打印样式 ===== */
@media print {
    header,
    .mobile-menu,
    .search-modal,
    .back-to-top,
    .slider-controls,
    .nav-actions {
        display: none !important;
    }
    
    .hero {
        padding: 20px 0;
    }
    
    section {
        padding: 20px 0;
        page-break-inside: avoid;
    }
    
    .scroll-animate {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===== 辅助功能 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-animate {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===== 选择高亮 ===== */
::selection {
    background: var(--primary);
    color: white;
}

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

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

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

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