/* ===== 全局样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1677ff;
    --primary-dark: #0958d9;
    --primary-light: #4096ff;
    --bg-dark: #0a1628;
    --bg-darker: #060d1a;
    --bg-card: #111c33;
    --bg-card-hover: #1a2744;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --border: #1e3a5f;
    --accent: #00d4ff;
    --gradient-primary: linear-gradient(135deg, #1677ff 0%, #00d4ff 100%);
    --gradient-bg: linear-gradient(180deg, #060d1a 0%, #0a1628 50%, #0d1f3c 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(6, 13, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}
.navbar.scrolled {
    background: rgba(6, 13, 26, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}
.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
}
.logo-icon {
    font-size: 28px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 15px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    position: relative;
}
.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: rgba(22, 119, 255, 0.1);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}
.nav-ai {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--gradient-primary);
    color: white !important;
    font-weight: 600;
    padding: 8px 18px !important;
    border-radius: 20px !important;
}
.nav-ai:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(22, 119, 255, 0.4);
}
.ai-badge {
    background: rgba(255,255,255,0.25);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: 0.3s;
}

/* ===== 主内容 ===== */
main {
    min-height: calc(100vh - 70px);
    padding-top: 70px;
}

/* ===== Hero区域 ===== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-bg);
    overflow: hidden;
    padding: 80px 24px;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(22, 119, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-5%, 5%); }
}
.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}
.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(22, 119, 255, 0.15);
    border: 1px solid rgba(22, 119, 255, 0.3);
    border-radius: 30px;
    font-size: 14px;
    color: var(--primary-light);
    margin-bottom: 24px;
}
.hero h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #fff 0%, #a0c4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}
.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(22, 119, 255, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(22, 119, 255, 0.4);
}
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

/* ===== 通用区块 ===== */
.section {
    padding: 80px 24px;
    max-width: 1280px;
    margin: 0 auto;
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(22, 119, 255, 0.1);
    color: var(--primary-light);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 16px;
}
.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}
.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 产品卡片 ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}
.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 12px 40px rgba(22, 119, 255, 0.15);
}
.product-image {
    height: 200px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    position: relative;
    overflow: hidden;
}
.product-image::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(22, 119, 255, 0.1) 0%, transparent 100%);
}
.product-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    background: rgba(22, 119, 255, 0.9);
    color: white;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    z-index: 1;
}
.product-info {
    padding: 24px;
}
.product-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}
.product-tagline {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}
.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}
.product-feature-tag {
    padding: 4px 10px;
    background: rgba(22, 119, 255, 0.1);
    color: var(--primary-light);
    border-radius: 4px;
    font-size: 12px;
}
.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.product-price {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
}
.product-detail-btn {
    color: var(--primary-light);
    font-size: 14px;
    font-weight: 500;
}

/* ===== 数据统计 ===== */
.stats-section {
    background: var(--bg-dark);
    padding: 60px 24px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.stats-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}
.stat-item h3 {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}
.stat-item p {
    font-size: 15px;
    color: var(--text-secondary);
}

/* ===== 方案/案例/知识 卡片 ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}
.card-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
    cursor: pointer;
}
.card-item:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 8px 30px rgba(22, 119, 255, 0.12);
}
.card-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}
.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}
.card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.card-tag {
    padding: 4px 10px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent);
    border-radius: 4px;
    font-size: 12px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border);
    padding: 60px 24px 0;
}
.footer-container {
    max-width: 1280px;
    margin: 0 auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-col h3 {
    font-size: 20px;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-col h4 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 14px;
    transition: color 0.2s;
}
.footer-col ul li a:hover {
    color: var(--primary-light);
}
.footer-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}
.contact-list li {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 10px;
}
.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* ===== FAQ ===== */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}
.faq-item:hover {
    border-color: var(--primary);
}
.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-weight: 500;
    font-size: 16px;
}
.faq-q {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}
.faq-question-text {
    flex: 1;
}
.faq-arrow {
    font-size: 24px;
    color: var(--primary-light);
    font-weight: 300;
    flex-shrink: 0;
}
.faq-answer {
    padding: 0 24px 20px 64px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: 0;
}
.faq-a {
    display: inline-block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 212, 255, 0.15);
    color: var(--accent);
    text-align: center;
    line-height: 24px;
    font-size: 13px;
    font-weight: 700;
    margin-right: 8px;
    flex-shrink: 0;
}

/* ===== 悬浮AI按钮 ===== */
.float-ai-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 8px 30px rgba(22, 119, 255, 0.4);
    transition: all 0.3s ease;
    justify-content: center;
}
.float-ai-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(22, 119, 255, 0.5);
}
.float-ai-icon {
    font-size: 24px;
}
.float-ai-text {
    font-size: 10px;
    font-weight: 600;
    color: white;
}

/* ===== AI顾问页面 ===== */
.ai-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 24px;
}
.ai-chat-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    height: 600px;
    display: flex;
    flex-direction: column;
}
.ai-chat-header {
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(22, 119, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}
.ai-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}
.ai-chat-header h3 {
    font-size: 16px;
    font-weight: 600;
}
.ai-chat-header p {
    font-size: 12px;
    color: var(--text-muted);
}
.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.chat-message {
    display: flex;
    gap: 12px;
    max-width: 80%;
}
.chat-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}
.chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}
.chat-message.ai .chat-avatar {
    background: var(--gradient-primary);
}
.chat-message.user .chat-avatar {
    background: var(--bg-dark);
    border: 1px solid var(--border);
}
.chat-bubble {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.7;
    white-space: pre-wrap;
}
.chat-message.ai .chat-bubble {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-top-left-radius: 4px;
}
.chat-message.user .chat-bubble {
    background: var(--gradient-primary);
    color: white;
    border-top-right-radius: 4px;
}
.ai-chat-input {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 12px;
}
.ai-chat-input input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}
.ai-chat-input input:focus {
    border-color: var(--primary);
}
.ai-chat-input button {
    padding: 12px 24px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.ai-chat-input button:hover {
    transform: translateY(-1px);
}
.ai-quick-questions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 24px;
    border-top: 1px solid var(--border);
}
.quick-q {
    padding: 6px 14px;
    background: rgba(22, 119, 255, 0.1);
    border: 1px solid rgba(22, 119, 255, 0.2);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary-light);
    cursor: pointer;
    transition: all 0.2s;
}
.quick-q:hover {
    background: rgba(22, 119, 255, 0.2);
    border-color: var(--primary);
}

/* ===== 产品详情页 ===== */
.product-detail {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
}
.product-detail-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}
.product-detail-image {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
}
.product-detail-info h1 {
    font-size: 32px;
    margin-bottom: 12px;
}
.product-detail-model {
    color: var(--primary-light);
    font-size: 16px;
    margin-bottom: 20px;
}
.product-detail-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}
.product-detail-features {
    margin-bottom: 24px;
}
.product-detail-features h4 {
    margin-bottom: 12px;
    font-size: 16px;
}
.product-detail-features ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.product-detail-features li {
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
    font-size: 14px;
}
.product-detail-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}
.product-detail-specs {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 40px;
}
.product-detail-specs h3 {
    font-size: 20px;
    margin-bottom: 24px;
}
.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.spec-item {
    padding: 16px;
    background: var(--bg-dark);
    border-radius: 8px;
}
.spec-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.spec-value {
    font-size: 15px;
    font-weight: 500;
}

/* ===== 关于我们 ===== */
.about-hero {
    text-align: center;
    padding: 80px 24px;
    background: var(--gradient-bg);
}
.about-hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
}
.about-hero p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}
.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 60px 0;
}
.value-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
}
.value-icon {
    font-size: 48px;
    margin-bottom: 20px;
}
.value-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}
.value-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

/* ===== 联系我们 ===== */
.contact-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
}
.contact-info h2 {
    font-size: 32px;
    margin-bottom: 20px;
}
.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}
.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
}
.contact-item-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}
.contact-item h4 {
    font-size: 16px;
    margin-bottom: 4px;
}
.contact-item p {
    color: var(--text-secondary);
    font-size: 14px;
}
.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
}
.contact-form h3 {
    font-size: 24px;
    margin-bottom: 24px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
    font-family: inherit;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .product-detail-hero { grid-template-columns: 1fr; }
    .contact-section { grid-template-columns: 1fr; }
    .specs-grid { grid-template-columns: repeat(2, 1fr); }
    .about-values { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0; right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
    }
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    .nav-toggle { display: flex; }
    .hero h1 { font-size: 36px; }
    .hero-desc { font-size: 16px; }
    .section-title { font-size: 28px; }
    .section { padding: 50px 20px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-item h3 { font-size: 36px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .form-row { grid-template-columns: 1fr; }
    .specs-grid { grid-template-columns: 1fr; }
    .product-detail-features ul { grid-template-columns: 1fr; }
    .ai-chat-container { height: 500px; }
    .chat-message { max-width: 90%; }
}


/* ===== 法律声明页面 ===== */
.legal-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 80px 20px;
}

.legal-content {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 40px;
    border: 1px solid var(--border-color);
}

.legal-section {
    margin-bottom: 30px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.legal-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.legal-section h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.legal-section h3::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--primary);
    border-radius: 2px;
}

.legal-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 15px;
    white-space: pre-line;
}

/* ===== AI免责提示 ===== */
.ai-disclaimer-notice {
    background: rgba(255, 159, 67, 0.1);
    border: 1px solid rgba(255, 159, 67, 0.3);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.ai-disclaimer-notice .disclaimer-icon {
    font-size: 18px;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ===== 页脚4列布局调整 ===== */
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
}

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .footer-col:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 500px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .legal-content {
        padding: 24px;
    }
}


/* ===== FAQ页面 ===== */
.faq-page {
    max-width: 900px;
    margin: 0 auto;
}

.faq-container {
    margin-top: 40px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

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

.faq-item.open {
    border-color: var(--primary);
    box-shadow: 0 4px 20px rgba(255, 159, 67, 0.15);
}

.faq-question {
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    color: var(--text-primary);
}

.faq-q-icon {
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-q-text {
    flex: 1;
    font-size: 15px;
}

.faq-arrow {
    color: var(--text-muted);
    font-size: 12px;
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.open .faq-arrow {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 20px;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: 0 20px 20px 20px;
}

.faq-a-icon {
    display: inline-block;
    width: 28px;
    height: 28px;
    background: var(--success, #10b981);
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    font-size: 14px;
    font-weight: 700;
    margin-right: 12px;
    vertical-align: top;
}

.faq-a-text {
    display: inline-block;
    width: calc(100% - 44px);
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
    vertical-align: top;
}

.faq-cta-box {
    margin-top: 50px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, #ff8c42 100%);
    border-radius: 16px;
    padding: 40px 30px;
    color: #fff;
}

.faq-cta-box h3 {
    font-size: 24px;
    margin-bottom: 8px;
    color: #fff;
}

.faq-cta-box p {
    margin-bottom: 20px;
    opacity: 0.9;
}

.faq-cta-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.faq-cta-btns .btn-primary {
    background: #fff;
    color: var(--primary);
}

.faq-cta-btns .btn-outline {
    border-color: #fff;
    color: #fff;
}

.faq-cta-btns .btn-outline:hover {
    background: rgba(255,255,255,0.1);
}

/* ===== 产品详情转化模块 ===== */
.detail-subtitle {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-subtitle::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--primary);
    border-radius: 2px;
}

.product-scenes {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.scenes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.scene-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s;
}

.scene-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.scene-icon {
    font-size: 32px;
    margin-bottom: 8px;
    display: block;
}

.product-why-us {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.why-us-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    transition: all 0.3s;
}

.why-us-item:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255, 159, 67, 0.15);
}

.why-us-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.why-us-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.why-us-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.product-cta-section {
    margin-top: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, #ff8c42 100%);
    border-radius: 16px;
    padding: 50px 30px;
    text-align: center;
    color: #fff;
}

.product-cta-content h3 {
    font-size: 26px;
    margin-bottom: 10px;
    color: #fff;
}

.product-cta-content > p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 24px;
}

.product-cta-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.product-cta-btns .btn-primary {
    background: #fff;
    color: var(--primary);
}

.product-cta-btns .btn-primary:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
}

.product-cta-btns .btn-outline {
    border-color: #fff;
    color: #fff;
}

.product-cta-btns .btn-outline:hover {
    background: rgba(255,255,255,0.15);
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.cta-note {
    font-size: 13px;
    opacity: 0.8;
    margin-top: 12px;
}

@media (max-width: 768px) {
    .scenes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-us-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-cta-section {
        padding: 30px 20px;
    }
    
    .product-cta-content h3 {
        font-size: 20px;
    }
    
    .product-cta-btns {
        flex-direction: column;
    }
    
    .product-cta-btns .btn {
        width: 100%;
    }
}


/* ===== 表单优化样式 ===== */
.form-header {
    text-align: center;
    margin-bottom: 24px;
}

.form-header h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

.form-trustbadges {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.form-trustbadges span {
    font-size: 13px;
    color: var(--success, #10b981);
    font-weight: 500;
}

.lead-form .form-group {
    margin-bottom: 16px;
}

.lead-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all 0.3s;
    box-sizing: border-box;
    font-family: inherit;
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 159, 67, 0.1);
}

.lead-form textarea {
    resize: vertical;
    min-height: 80px;
}

.btn-form-submit {
    width: 100%;
    justify-content: center;
    padding: 14px !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    border: none !important;
    cursor: pointer;
    transition: all 0.3s !important;
}

.btn-form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 159, 67, 0.4);
}

.btn-form-submit:disabled {
    cursor: not-allowed;
    transform: none;
}

.form-privacy {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 12px;
}

/* ===== 下载手册CTA区块 ===== */
.brochure-cta-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 60px 20px;
    max-width: 100%;
}

.brochure-cta-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 50px;
    border: 1px solid var(--border-color);
}

.brochure-cta-left {
    flex: 1;
}

.brochure-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.brochure-cta-left h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.brochure-cta-left > p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.brochure-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.brochure-list li {
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.brochure-cta-right {
    text-align: center;
    flex-shrink: 0;
}

.brochure-note {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 12px;
}

/* ===== 弹窗样式 ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 28px;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    z-index: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-header {
    text-align: center;
    padding: 30px 30px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.modal-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.brochure-modal form {
    padding: 24px 30px 30px;
}

@media (max-width: 900px) {
    .brochure-cta-container {
        flex-direction: column;
        text-align: center;
        padding: 30px;
        gap: 30px;
    }
    
    .brochure-list {
        text-align: left;
        display: inline-block;
    }
    
    .form-trustbadges {
        gap: 10px;
    }
}

@media (max-width: 500px) {
    .brochure-cta-left h3 {
        font-size: 20px;
    }
    
    .modal-content {
        width: 95%;
    }
    
    .modal-header {
        padding: 24px 20px 16px;
    }
    
    .brochure-modal form {
        padding: 20px;
    }
}


/* ===== 移动端底部固定CTA栏 ===== */
.mobile-bottom-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    z-index: 9999;
    padding: 8px 10px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.mobile-cta-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 4px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    text-decoration: none;
    transition: color 0.2s;
}

.mobile-cta-btn:hover,
.mobile-cta-btn:active {
    color: var(--primary);
}

.mobile-cta-icon {
    font-size: 20px;
}

.mobile-cta-primary {
    color: var(--primary);
    font-weight: 600;
}

.mobile-cta-quote {
    background: var(--primary);
    color: #fff !important;
    border-radius: 8px;
    padding: 8px 4px;
    font-weight: 600;
}

.mobile-cta-quote:hover {
    background: var(--primary-dark);
    color: #fff;
}

/* ===== 回到顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 20px;
    cursor: pointer;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(255, 159, 67, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .mobile-bottom-cta {
        display: flex;
    }
    
    .back-to-top {
        bottom: 75px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    /* 移动端底部留出CTA空间 */
    .footer {
        padding-bottom: 80px;
    }
}


/* ===== 首页数据强化 ===== */
.stats-grid .stat-item {
    position: relative;
}

.stat-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* ===== 六大优势 ===== */
.about-values.six-values {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .about-values.six-values {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 合作伙伴板块 ===== */
.partner-section {
    background: var(--bg-dark);
    max-width: 100%;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.partner-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px 16px;
    text-align: center;
    transition: all 0.3s;
}

.partner-item:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255, 159, 67, 0.15);
}

.partner-logo {
    font-size: 36px;
    margin-bottom: 12px;
}

.partner-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.partner-industry {
    font-size: 12px;
    color: var(--text-muted);
}

@media (max-width: 900px) {
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 新闻资讯页面 ===== */
.news-page {
    max-width: 1100px;
    margin: 0 auto;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.news-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

.news-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(255, 159, 67, 0.15);
}

.news-image {
    height: 160px;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a2e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    font-size: 48px;
}

.news-category {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--primary);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.news-content {
    padding: 20px;
}

.news-date {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-summary {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
}

@media (max-width: 900px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
}