/* ===========================
   锐智动力 - 企业官网样式
   =========================== */

/* CSS 变量 */
:root {
    --primary: #0a66c2;
    --primary-dark: #064a8a;
    --primary-light: #e8f4fd;
    --secondary: #1a1a2e;
    --text: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    --bg: #ffffff;
    --bg-light: #f8f9fa;
    --bg-dark: #0f1923;
    --border: #e5e5e5;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

/* ===========================
   按钮
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(10, 102, 194, 0.4);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-outline:hover {
    background: #fff;
    color: var(--primary);
    transform: translateY(-2px);
}

.btn-small {
    padding: 8px 18px;
    font-size: 13px;
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    border-radius: var(--radius);
}

.btn-small:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ===========================
   导航栏
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 16px 0;
}

.header.scrolled,
.header-solid {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    padding: 10px 0;
}

.header-solid .logo span,
.header.scrolled .logo span {
    color: var(--secondary);
}

.header-solid .nav-menu a,
.header.scrolled .nav-menu a {
    color: var(--text);
}

.header-solid .nav-menu a:hover,
.header.scrolled .nav-menu a:hover,
.header-solid .nav-menu a.active,
.header.scrolled .nav-menu a.active {
    color: var(--primary);
}

.header-solid .nav-toggle span,
.header.scrolled .nav-toggle span {
    background: var(--text);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

.logo i {
    font-size: 28px;
    color: var(--primary);
}

.header-solid .logo i,
.header.scrolled .logo i {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: var(--transition);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===========================
   Hero 区域
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0f1923 0%, #1a2a3a 30%, #0a3d62 60%, #0a66c2 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(10, 102, 194, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(6, 74, 138, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(10, 102, 194, 0.2) 0%, transparent 50%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding-top: 80px;
}

.hero-content {
    margin-bottom: 60px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 4px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 4px;
}

.stat-number::after {
    content: '+';
    font-size: 28px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ===========================
   通用 Section 标题
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
    margin-top: 16px;
}

.section-footer {
    text-align: center;
    margin-top: 40px;
}

/* ===========================
   核心优势
   =========================== */
.features {
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    font-size: 28px;
    color: var(--primary);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: #fff;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--secondary);
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===========================
   热门产品
   =========================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    height: 220px;
    background: linear-gradient(135deg, #f0f4f8, #e2e8f0);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    font-size: 32px;
    color: var(--primary);
}

.product-placeholder.large {
    width: 100px;
    height: 100px;
    font-size: 40px;
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 14px;
    background: #ff4757;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
}

.product-badge:not(.product-badge + .product-badge) {
    background: var(--primary);
}

.product-info {
    padding: 24px;
}

.product-info h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--secondary);
}

.product-info p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-specs {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.product-specs span {
    font-size: 12px;
    color: var(--text-lighter);
    display: flex;
    align-items: center;
    gap: 4px;
}

.product-specs span i {
    color: var(--primary);
    font-size: 11px;
}

/* ===========================
   应用领域
   =========================== */
.applications {
    background: var(--bg-light);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.app-card {
    background: #fff;
    padding: 28px 16px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.app-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.app-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 12px;
    font-size: 22px;
    color: var(--primary);
    transition: var(--transition);
}

.app-card:hover .app-icon {
    background: var(--primary);
    color: #fff;
}

.app-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--secondary);
}

.app-card p {
    font-size: 12px;
    color: var(--text-lighter);
}

/* ===========================
   合作伙伴
   =========================== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.partner-item {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-lighter);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

/* ===========================
   CTA 区域
   =========================== */
.cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
}

.cta p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 28px;
}

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

.cta .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* ===========================
   页脚
   =========================== */
.footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-about .logo {
    margin-bottom: 16px;
}

.footer-about .logo span {
    color: #fff;
}

.footer-about p {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.7);
    font-size: 16px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: #fff;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

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

.footer-contact ul li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact ul li i {
    color: var(--primary);
    width: 16px;
    text-align: center;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* ===========================
   页面标题（内页）
   =========================== */
.page-header {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, #0f1923 0%, #1a2a3a 50%, #0a3d62 100%);
    text-align: center;
    position: relative;
}

.page-header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
}

/* ===========================
   产品中心页
   =========================== */
.product-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    border: 2px solid var(--border);
    background: #fff;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover,
.tab-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.products-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.product-detail-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-detail-card:hover {
    box-shadow: var(--shadow-lg);
}

.product-detail-image {
    height: 100%;
    min-height: 300px;
    background: linear-gradient(135deg, #f0f4f8, #e2e8f0);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.product-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 10px;
}

.product-detail-info h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-specs-table {
    margin-bottom: 20px;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row span:first-child {
    color: var(--text-light);
}

.spec-row span:last-child {
    font-weight: 600;
    color: var(--secondary);
}

/* ===========================
   关于我们页
   =========================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: center;
}

.about-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #f0f4f8, #e2e8f0);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.about-placeholder i {
    font-size: 64px;
    color: var(--primary);
    opacity: 0.5;
}

.about-placeholder p {
    font-size: 14px;
    color: var(--text-lighter);
}

.about-content h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 20px;
}

.about-content p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-highlights {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border-left: 3px solid var(--primary);
}

.highlight-item i {
    font-size: 20px;
    color: var(--primary);
}

.highlight-item strong {
    display: block;
    font-size: 14px;
    color: var(--secondary);
}

.highlight-item span {
    font-size: 12px;
    color: var(--text-lighter);
}

/* 时间线 */
.timeline {
    background: var(--bg-light);
}

.timeline-list {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 36px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 4px;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-year {
    display: inline-block;
    padding: 2px 14px;
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 6px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 团队 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    background: #fff;
    padding: 30px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary-light), #d4e8f7);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary);
}

.team-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 4px;
}

.team-role {
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 10px;
}

.team-desc {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 企业文化 */
.culture {
    background: var(--bg-light);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.culture-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.culture-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.culture-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    font-size: 24px;
    color: var(--primary);
}

.culture-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
}

.culture-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===========================
   联系我们页
   =========================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
}

.contact-info > p,
.contact-form-wrapper > p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 28px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 12px;
    font-size: 18px;
    color: var(--primary);
}

.contact-item h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

.contact-social h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 12px;
}

.social-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-light);
    border-radius: 30px;
    font-size: 13px;
    color: var(--text-light);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
    color: #fff;
}

/* 表单 */
.contact-form-wrapper {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 18px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* 地图 */
.map-section {
    height: 300px;
    background: var(--bg-light);
}

.map-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #f0f4f8, #e2e8f0);
}

.map-placeholder i {
    font-size: 48px;
    color: var(--primary);
    opacity: 0.4;
}

.map-placeholder p {
    font-size: 16px;
    color: var(--text-light);
}

.map-placeholder span {
    font-size: 13px;
    color: var(--text-lighter);
}

/* ===========================
   响应式设计
   =========================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .app-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

    .about-placeholder {
        height: 280px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .product-detail-card {
        grid-template-columns: 1fr;
    }

    .product-detail-image {
        min-height: 220px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 50px 0;
    }

    .hero-title {
        font-size: 36px;
        letter-spacing: 2px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        padding: 24px;
    }

    .stat-number {
        font-size: 32px;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 0;
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu a {
        color: var(--text);
        font-size: 16px;
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
        width: 100%;
    }

    .nav-menu a::after {
        display: none;
    }

    .nav-menu a.active {
        color: var(--primary);
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle span {
        background: var(--text);
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .team-grid {
        grid-template-columns: 1fr;
    }

    .culture-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 26px;
    }

    .page-header {
        padding: 120px 0 40px;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .cta h2 {
        font-size: 22px;
    }

    .product-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }

    .app-grid {
        grid-template-columns: 1fr 1fr;
    }

    .partners-grid {
        grid-template-columns: 1fr 1fr;
    }

    .contact-form-wrapper {
        padding: 24px;
    }
}

/* ===========================
   动画
   =========================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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