/* ============================================
   智造云 - 中国制造业数字化服务平台
   主色调: 科技蓝 #0052d9
   强调色: 活力橙 #ff6a00
   字体: 思源黑体 Noto Sans SC
   ============================================ */

:root {
    /* Primary Colors - 科技蓝 */
    --color-primary: #0052d9;
    --color-primary-light: #366ef4;
    --color-primary-dark: #003cab;

    /* Accent Color - 活力橙 */
    --color-accent: #ff6a00;
    --color-accent-light: #ff8533;
    --color-accent-dark: #e55d00;

    /* Secondary - 深色背景 */
    --color-dark: #0d1b2a;
    --color-dark-light: #1b2d44;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f7f8fa;
    --color-gray-100: #f0f2f5;
    --color-gray-200: #e5e8ed;
    --color-gray-300: #d4d9e1;
    --color-gray-400: #b8c0cc;
    --color-gray-500: #8a94a6;
    --color-gray-600: #5c6678;
    --color-gray-700: #3d4757;
    --color-gray-800: #252d3a;
    --color-gray-900: #121820;

    /* Typography - 思源黑体 */
    --font-primary: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 900;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;

    /* Container */
    --container-max: 1400px;
    --container-padding: 1.5rem;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-regular);
    line-height: 1.75;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
.section-tag {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-top: calc(var(--spacing-lg) * -1);
    margin-bottom: var(--spacing-2xl);
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 600px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(255, 106, 0, 0.4);
}

.btn-secondary {
    background: var(--color-primary);
    color: var(--color-white);
}

.btn-secondary:hover {
    background: var(--color-primary-light);
}

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

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

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

/* Top Bar */
.top-bar {
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-200);
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.top-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.top-menu a {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

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

.language-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.globe-icon {
    width: 16px;
    height: 16px;
    color: var(--color-gray-600);
}

.language-selector select {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: var(--font-primary);
}

/* Main Header */
.main-header {
    padding: var(--spacing-md) 0;
}

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

/* Logo - 中文风格 */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-md);
}

.logo-text-cn {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    letter-spacing: 0.05em;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    transition: var(--transition-fast);
}

/* Industry Nav */
.industry-nav {
    background: var(--color-primary);
    overflow: hidden;
}

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

.industry-menu {
    display: flex;
    gap: var(--spacing-xl);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: var(--spacing-md) 0;
}

.industry-menu::-webkit-scrollbar {
    display: none;
}

.industry-menu a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.85);
    white-space: nowrap;
    transition: color var(--transition-fast);
}

.industry-menu a:hover {
    color: var(--color-white);
}

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 10px;
    margin-left: var(--spacing-md);
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-white);
}

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: var(--color-dark);
    z-index: 1001;
    transition: right var(--transition-normal);
    overflow-y: auto;
    padding: var(--spacing-xl);
}

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

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.mobile-nav-header .logo {
    color: var(--color-white);
    font-weight: var(--font-weight-bold);
    font-size: 1.25rem;
}

.close-btn {
    color: var(--color-white);
    font-size: 2rem;
    line-height: 1;
}

.mobile-menu-list a,
.mobile-menu-list span {
    display: block;
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    font-size: 1.125rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.submenu {
    padding-left: var(--spacing-lg);
}

.submenu a {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.mobile-nav-footer {
    margin-top: var(--spacing-2xl);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    transition: background var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-accent);
}

.social-links svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    margin-top: 120px;
    display: flex;
    overflow: hidden;
}

.hero-slider {
    flex: 1;
    position: relative;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

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

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13, 27, 42, 0.9) 0%, rgba(0, 82, 217, 0.6) 100%);
}

.hero-slide .container {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 700px;
    padding: var(--spacing-4xl) 0;
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

.hero-desc {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.video-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-white);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
}

.play-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    transition: all var(--transition-fast);
}

.video-link:hover .play-icon {
    background: var(--color-accent);
    transform: scale(1.1);
}

.play-icon svg {
    width: 16px;
    height: 16px;
    fill: var(--color-white);
    margin-left: 3px;
}

/* Hero Sidebar */
.hero-sidebar {
    width: 380px;
    background: var(--color-white);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    overflow-y: auto;
    margin-top: 80px;
}

.sidebar-card {
    padding: var(--spacing-lg);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.sidebar-card:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.card-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    background: rgba(0, 82, 217, 0.1);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
}

.sidebar-card h3 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.card-link {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
}

.card-link:hover {
    color: var(--color-accent);
}

/* Slider Dots */
.slider-dots {
    position: absolute;
    bottom: var(--spacing-xl);
    left: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 10;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.4);
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--color-accent);
    width: 36px;
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    overflow: hidden;
}

.stats-track {
    display: flex;
    gap: var(--spacing-4xl);
    animation: scroll 35s linear infinite;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.stat-item {
    min-width: 220px;
    text-align: center;
    color: var(--color-white);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
}

.stat-number {
    display: block;
    font-size: 2.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-desc {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   ADVANTAGE SECTION
   ============================================ */
.advantage-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-white);
}

.advantage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.advantage-content {
    position: sticky;
    top: 150px;
}

.advantage-content .section-title {
    margin-top: var(--spacing-md);
}

.lead-text {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.advantage-content p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.subsection-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.read-more-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-md);
}

.read-more-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    transition: transform var(--transition-fast);
}

.read-more-btn.expanded svg {
    transform: rotate(180deg);
}

.read-more-content {
    display: none;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
}

.read-more-content.show {
    display: block;
    animation: fadeIn var(--transition-normal);
}

.read-more-content h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

/* Feature Cards */
.advantage-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.feature-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 320px;
}

.feature-card .card-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.feature-card .card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(13, 27, 42, 0.95) 0%, rgba(13, 27, 42, 0.3) 100%);
}

.feature-card .card-content {
    position: relative;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
    color: var(--color-white);
}

.feature-card h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    font-size: 0.9375rem;
    opacity: 0.9;
    line-height: 1.7;
}

/* ============================================
   MAP SECTION
   ============================================ */
.map-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-dark);
    color: var(--color-white);
}

.map-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.map-header .section-title {
    color: var(--color-white);
}

.map-header .section-desc {
    color: rgba(255, 255, 255, 0.7);
    max-width: 700px;
    margin: 0 auto;
}

/* China Map */
.china-map {
    position: relative;
    height: 400px;
    margin-bottom: var(--spacing-3xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.china-map .map-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.5) saturate(0.8);
}

.map-overlay-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 0%, var(--color-dark) 100%);
}

.map-markers {
    position: absolute;
    inset: 0;
}

.map-marker {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.marker-dot {
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.3);
    animation: markerPulse 2s ease-in-out infinite;
}

@keyframes markerPulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.3); }
    50% { box-shadow: 0 0 0 8px rgba(255, 106, 0, 0.1); }
}

.marker-label {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-white);
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
}

/* Region Stats */
.region-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.region-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.region-item h4 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.region-item p {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
}

/* ============================================
   CLIENTS SECTION
   ============================================ */
.clients-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-gray-50);
}

.clients-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.clients-slider {
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.clients-track {
    display: flex;
    gap: var(--spacing-xl);
    animation: scrollClients 30s linear infinite;
}

.clients-slider.reverse .clients-track {
    animation-direction: reverse;
}

@keyframes scrollClients {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.client-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 160px;
    height: 80px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.client-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.client-logo:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

/* ============================================
   INDUSTRIES SECTION
   ============================================ */
.industries-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-white);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.industry-card {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.industry-card .card-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform var(--transition-slow);
}

.industry-card:hover .card-bg {
    transform: scale(1.1);
}

.industry-card .card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(13, 27, 42, 0.95) 0%, transparent 60%);
}

.industry-card .card-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-xl);
}

.industry-card h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.industry-card p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
}

.card-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    position: absolute;
    right: var(--spacing-xl);
    bottom: var(--spacing-xl);
    transform: translateX(-10px);
    opacity: 0;
    transition: all var(--transition-fast);
}

.industry-card:hover .card-arrow {
    transform: translateX(0);
    opacity: 1;
}

.card-arrow svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-white);
    stroke-width: 2;
    fill: none;
}

/* ============================================
   INSIGHTS SECTION
   ============================================ */
.insights-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-gray-50);
}

.insights-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.insights-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-2xl);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    background: var(--color-white);
    border-radius: var(--radius-full);
    white-space: nowrap;
    transition: all var(--transition-fast);
    border: 1px solid var(--color-gray-200);
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.insights-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.insight-card.featured {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

.insight-card .card-image {
    position: relative;
    aspect-ratio: 16/10;
}

.insight-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.insight-card .card-image .card-tag {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
}

.insight-card .card-body {
    padding: var(--spacing-xl);
}

.insight-card h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-900);
}

.insight-card h3 a:hover {
    color: var(--color-primary);
}

.author {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.insight-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.insight-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.insight-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.insight-item .item-image {
    width: 140px;
    height: 90px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.insight-item .item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.item-content {
    flex: 1;
}

.item-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.insight-item h4 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    margin-bottom: var(--spacing-xs);
    color: var(--color-gray-900);
}

.insight-item h4 a:hover {
    color: var(--color-primary);
}

.insights-showcase {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.showcase-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.showcase-item:hover img {
    transform: scale(1.1);
}

.showcase-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(to top, rgba(13, 27, 42, 0.95) 0%, transparent 100%);
}

.showcase-item .item-tag {
    color: var(--color-accent);
}

.showcase-item h4 {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    line-height: 1.4;
}

/* ============================================
   CERTIFICATIONS SECTION
   ============================================ */
.certifications-section {
    padding: var(--spacing-4xl) 0;
    background: var(--color-white);
}

.certifications-content {
    text-align: center;
}

.certifications-content .section-title {
    margin-bottom: var(--spacing-3xl);
}

.certifications-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
}

.cert-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    min-width: 150px;
    transition: all var(--transition-fast);
}

.cert-item:hover {
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

.cert-item img {
    max-height: 50px;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all var(--transition-fast);
}

.cert-item:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

.cert-item span {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.cta-content {
    text-align: center;
    color: var(--color-white);
}

.cta-content h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

.cta-content > p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.cta-contact {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
}

.cta-contact span {
    font-weight: var(--font-weight-semibold);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding-top: var(--spacing-4xl);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: var(--spacing-4xl);
    padding-bottom: var(--spacing-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
}

.footer-logo span:last-child {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
}

.footer-brand > p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-lg);
}

.contact-info {
    margin-bottom: var(--spacing-lg);
}

.contact-info p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.contact-info .phone {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin: var(--spacing-xs) 0;
}

.footer-brand .social-links a {
    background: rgba(255, 255, 255, 0.1);
}

.footer-brand .social-links a:hover {
    background: var(--color-accent);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-accent);
}

.qr-code {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.qr-code img {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
}

.qr-code span {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl) 0;
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-legal a:hover {
    color: var(--color-accent);
}

/* ============================================
   VIDEO MODAL
   ============================================ */
.video-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
}

.modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    color: var(--color-white);
    font-size: 2rem;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.modal-close:hover {
    opacity: 1;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
}

/* ============================================
   CHAT WIDGET
   ============================================ */
.chat-widget {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 999;
}

.chat-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-fast);
}

.chat-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255, 106, 0, 0.4);
}

.chat-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.fade-in {
    animation: fadeIn var(--transition-normal) ease-out forwards;
}

.fade-in-up {
    animation: fadeInUp var(--transition-slow) ease-out forwards;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1200px) {
    .hero-sidebar {
        width: 320px;
    }

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

    .advantage-content {
        position: static;
    }

    .advantage-cards {
        flex-direction: row;
    }

    .feature-card {
        flex: 1;
    }
}

@media (max-width: 992px) {
    .top-bar {
        display: none;
    }

    .hero {
        flex-direction: column;
        margin-top: 80px;
    }

    .hero-slider {
        min-height: 70vh;
    }

    .hero-sidebar {
        width: 100%;
        flex-direction: row;
        overflow-x: auto;
        padding: var(--spacing-lg);
    }

    .sidebar-card {
        min-width: 280px;
    }

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

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

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

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

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

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

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }

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

    .main-header .btn {
        display: none;
    }

    .industry-nav {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .stat-number {
        font-size: 2.25rem;
    }

    .advantage-cards {
        flex-direction: column;
    }

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

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

    .insights-showcase {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .cta-actions {
        flex-direction: column;
    }

    .chat-widget {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
}

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

    .sidebar-card {
        min-width: 100%;
    }

    .slider-dots {
        left: 50%;
        transform: translateX(-50%);
    }

    .insight-item {
        flex-direction: column;
    }

    .insight-item .item-image {
        width: 100%;
        height: 150px;
    }

    .chat-btn span {
        display: none;
    }

    .chat-btn {
        padding: var(--spacing-md);
        border-radius: var(--radius-full);
    }
}

/* ============================================
   社交弹窗样式
   ============================================ */
.social-popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.social-popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.social-popup {
    background: white;
    border-radius: 16px;
    padding: 32px;
    max-width: 320px;
    width: 90%;
    text-align: center;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.social-popup-overlay.active .social-popup {
    transform: scale(1);
}

.social-popup-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: #f0f2f5;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    transition: all 0.2s;
}

.social-popup-close:hover {
    background: #e5e8ed;
    color: #333;
}

.social-popup-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: #1e1e2d;
    margin-bottom: 16px;
}

.social-popup-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.6;
}

.social-popup-content img {
    margin-top: 8px;
}