/* ==================== CSS变量定义 ==================== */
:root {
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-blue-light: #3b82f6;
    --primary-orange: #f97316;
    --primary-orange-dark: #ea580c;
    --primary-orange-light: #fb923c;
    --text-dark: #0f172a;
    --text-gray: #475569;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --gradient-blue: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --gradient-orange: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #2563eb 100%);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 重置样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: 14px;
    outline: none;
}

/* ==================== 通用组件 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary-blue);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-blue);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.4);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.7);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

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

.btn-block {
    width: 100%;
}

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

.header.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    display: flex;
    align-items: center;
}

.logo-icon-img {
    height: 38px;
    width: auto;
    display: block;
}

.logo-icon-img.logo-icon-dark {
    display: none;
}

.header.scrolled .logo-icon-img.logo-icon-light {
    display: none;
}

.header.scrolled .logo-icon-img.logo-icon-dark {
    display: block;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-main {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    transition: var(--transition);
}

.header.scrolled .logo-main {
    color: var(--text-dark);
}

.logo-sub {
    font-size: 11px;
    color: rgba(255,255,255,0.7);
    letter-spacing: 1px;
    transition: var(--transition);
}

.header.scrolled .logo-sub {
    color: var(--text-light);
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.header.scrolled .nav-link {
    color: var(--text-gray);
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.15);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
    color: var(--primary-blue);
    background: rgba(37, 99, 235, 0.08);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

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

.header.scrolled .menu-toggle span {
    background: var(--text-dark);
}

/* ==================== Hero区域 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-bg {
    position: absolute;
    inset: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(249, 115, 22, 0.15) 0%, transparent 40%),
        radial-gradient(ellipse at 60% 80%, rgba(59, 130, 246, 0.2) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255,255,255,0.4);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0.3; }
    50% { transform: translateY(-100px) translateX(30px); opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
    padding-top: 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    color: #fff;
    font-size: 13px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-orange);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 24px;
}

.hero-highlight {
    display: block;
    background: linear-gradient(90deg, var(--primary-orange-light), var(--primary-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-top: 8px;
}

.hero-desc {
    font-size: 17px;
    color: rgba(255,255,255,0.75);
    margin-bottom: 36px;
    max-width: 520px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.stat-plus {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-orange);
}

.stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    margin-top: 4px;
}

/* Hero右侧卡片 */
.hero-visual {
    position: relative;
    height: 400px;
}

.hero-card {
    position: absolute;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 24px;
    width: 260px;
    box-shadow: var(--shadow-xl);
}

.hero-card:first-child {
    top: 20px;
    right: 40px;
}

.hero-card.card-delay {
    bottom: 20px;
    left: 20px;
}

.card-float {
    animation: cardFloat 4s ease-in-out infinite;
}

.card-delay {
    animation-delay: 1s;
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.card-icon.blue {
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.2));
    color: var(--primary-blue);
}

.card-icon.orange {
    background: linear-gradient(135deg, rgba(249,115,22,0.1), rgba(249,115,22,0.2));
    color: var(--primary-orange);
}

.hero-card h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.hero-card p {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.5);
    font-size: 12px;
    z-index: 2;
    opacity: 1;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.hero-scroll.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
    pointer-events: none;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ==================== 关于我们 ==================== */
.about {
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.about-content p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-features {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(37,99,235,0.15));
    color: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-item h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.feature-item p {
    font-size: 14px;
    color: var(--text-gray);
    margin: 0;
}

.about-image {
    position: relative;
}

.image-frame {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.image-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 3px solid var(--primary-blue);
    border-radius: var(--radius-xl);
    opacity: 0.3;
    z-index: 1;
    pointer-events: none;
}

.about-img {
    width: 100%;
    height: auto;
}

.image-badge {
    position: absolute;
    bottom: -20px;
    left: -20px;
    background: var(--gradient-orange);
    color: #fff;
    padding: 20px 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
}

.badge-num {
    font-size: 32px;
    font-weight: 800;
    line-height: 1;
}

.badge-text {
    font-size: 13px;
    opacity: 0.9;
    margin-top: 4px;
}

/* ==================== 核心业务 ==================== */
.business {
    background: var(--bg-light);
}

.business-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.business-card {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

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

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

.business-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.business-icon.blue {
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.2));
    color: var(--primary-blue);
}

.business-icon.orange {
    background: linear-gradient(135deg, rgba(249,115,22,0.1), rgba(249,115,22,0.2));
    color: var(--primary-orange);
}

.business-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.business-card > p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.business-list {
    margin-bottom: 28px;
}

.business-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-gray);
}

.list-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-blue);
    flex-shrink: 0;
}

.business-card:nth-child(2) .list-dot {
    background: var(--primary-orange);
}

.business-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-blue);
}

.business-card:nth-child(2) .business-link {
    color: var(--primary-orange);
}

.business-link:hover {
    gap: 10px;
}

/* ==================== 数字化产品 ==================== */
.products {
    background: var(--bg-white);
}

.products-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.product-card {
    border-radius: var(--radius-xl);
    padding: 40px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.product-blue {
    background: linear-gradient(160deg, #eff6ff 0%, #dbeafe 100%);
    border: 1px solid rgba(37,99,235,0.15);
}

.product-orange {
    background: linear-gradient(160deg, #fff7ed 0%, #ffedd5 100%);
    border: 1px solid rgba(249,115,22,0.15);
}

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

.product-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.product-logo {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-md);
}

.product-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-tag {
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.product-blue .product-tag {
    background: rgba(37,99,235,0.1);
    color: var(--primary-blue);
}

.product-orange .product-tag {
    background: rgba(249,115,22,0.1);
    color: var(--primary-orange);
}

.product-name {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 12px;
}

.product-blue .product-name {
    color: var(--primary-blue-dark);
}

.product-orange .product-name {
    color: var(--primary-orange-dark);
}

.product-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.pf-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-gray);
}

.product-blue .pf-item svg {
    color: var(--primary-blue);
}

.product-orange .pf-item svg {
    color: var(--primary-orange);
}

.product-stats {
    display: flex;
    gap: 24px;
    padding: 20px 0;
    border-top: 1px solid rgba(0,0,0,0.06);
    margin-bottom: 24px;
}

.product-stats > div {
    display: flex;
    flex-direction: column;
}

.product-stats strong {
    font-size: 22px;
    font-weight: 800;
}

.product-blue .product-stats strong {
    color: var(--primary-blue);
}

.product-orange .product-stats strong {
    color: var(--primary-orange);
}

.product-stats span {
    font-size: 12px;
    color: var(--text-light);
}

.btn-product {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    color: #fff;
}

.btn-blue {
    background: var(--gradient-blue);
    box-shadow: 0 4px 14px rgba(37,99,235,0.3);
}

.btn-blue:hover {
    box-shadow: 0 6px 20px rgba(37,99,235,0.4);
    transform: translateY(-2px);
}

.btn-orange {
    background: var(--gradient-orange);
    box-shadow: 0 4px 14px rgba(249,115,22,0.3);
}

.btn-orange:hover {
    box-shadow: 0 6px 20px rgba(249,115,22,0.4);
    transform: translateY(-2px);
}

/* ==================== 经营理念 ==================== */
.philosophy {
    background: var(--bg-light);
}

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

.philo-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.philo-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.philo-blue .philo-icon {
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.2));
    color: var(--primary-blue);
}

.philo-orange .philo-icon {
    background: linear-gradient(135deg, rgba(249,115,22,0.1), rgba(249,115,22,0.2));
    color: var(--primary-orange);
}

.philo-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.philo-card p {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
}

/* ==================== 数据展示 ==================== */
.data-section {
    background: var(--gradient-hero);
    padding: 70px 0;
    position: relative;
    overflow: hidden;
}

.data-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(37,99,235,0.2) 0%, transparent 70%);
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 1;
}

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

.data-num {
    font-size: 48px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.data-unit {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-orange);
}

.data-label {
    display: block;
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    margin-top: 8px;
}

/* ==================== 新闻动态 ==================== */
.news {
    background: var(--bg-white);
}

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

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.news-img {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.news-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.8);
}

.blue-gradient {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.orange-gradient {
    background: linear-gradient(135deg, #f97316, #ea580c);
}

.news-date {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255,255,255,0.95);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dark);
}

.news-content {
    padding: 24px;
}

.news-cat {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-blue);
    background: rgba(37,99,235,0.08);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.news-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-blue);
}

.news-link:hover {
    color: var(--primary-blue-dark);
}

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

.contact-wrap {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-title {
    text-align: left;
}

.contact-desc {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 32px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.ci-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--gradient-blue);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-item > div {
    display: flex;
    flex-direction: column;
}

.ci-label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 2px;
}

.ci-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

.contact-form-wrap {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-dark);
}

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

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

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-blue);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: #0f172a;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.6fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo-icon {
    display: flex;
    align-items: center;
}

.footer-logo-icon-img {
    height: 40px;
    width: auto;
    display: block;
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.fl-main {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.fl-sub {
    font-size: 11px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 1px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.5);
}

.footer-col h5 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

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

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
}

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

.footer-contact li {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    margin-bottom: 10px;
    white-space: nowrap;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

.footer-bottom p {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px;
    line-height: 1;
}

/* ==================== 回到顶部 ==================== */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-blue);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.4);
}

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

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        display: none;
    }

    .about-grid,
    .contact-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .ci-value {
        white-space: normal;
    }

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 80px 24px 24px;
        gap: 4px;
        box-shadow: var(--shadow-xl);
        transition: right 0.3s ease;
    }

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

    .nav-link {
        color: var(--text-gray) !important;
        padding: 12px 16px;
        font-size: 16px;
    }

    .nav-link.active {
        color: var(--primary-blue) !important;
        background: rgba(37,99,235,0.08);
    }

    .menu-toggle {
        display: flex;
    }

    .nav-actions .btn {
        display: none;
    }

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

    .hero-desc {
        font-size: 15px;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-num {
        font-size: 28px;
    }

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

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

    .data-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .data-num {
        font-size: 36px;
    }

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

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

    .footer-contact li {
        white-space: normal;
    }

    .image-badge {
        left: 16px;
        bottom: -16px;
        padding: 14px 20px;
    }

    .badge-num {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

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

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

    .product-stats {
        flex-wrap: wrap;
        gap: 16px;
    }
}