/* ========================================
   VideoTV 音视频方案整合官网样式表
   对标 polyv.net 布局风格
======================================== */

/* Smooth Scroll */
html { scroll-behavior: smooth; }

/* CSS Variables */
:root {
    --primary: #4F46E5;
    --primary-dark: #3730A3;
    --primary-light: #818CF8;
    --secondary: #06B6D4;
    --accent: #7C3AED;
    --bg-dark: #0F172A;
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;
    --text-dark: #1E293B;
    --text-gray: #64748B;
    --text-light: #94A3B8;
    --border: #E2E8F0;
    --gradient-primary: linear-gradient(135deg, #4F46E5, #7C3AED, #06B6D4);
    --gradient-dark: linear-gradient(135deg, #0F172A, #1E293B);
    --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);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.4);
}

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

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-block {
    width: 100%;
}

.btn-arrow {
    transition: transform 0.3s ease;
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ========================================
   Navigation
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

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

/* Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 280px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 12px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
    transition: background 0.2s ease;
}

.dropdown-item:hover {
    background: var(--bg-light);
}

.dropdown-item .item-icon {
    font-size: 24px;
}

.dropdown-item .item-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-dark);
}

.dropdown-item .item-desc {
    font-size: 12px;
    color: var(--text-gray);
}

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

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 1002;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* 汉堡按钮激活状态 → 变X */
.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - 72px);
    background: var(--bg-white);
    padding: 24px;
    padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    z-index: 1001;
    pointer-events: none;
    box-sizing: border-box;
}

.mobile-menu.active {
    display: block;
    pointer-events: auto;
}

.mobile-nav-link {
    display: block;
    padding: 16px 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border);
}

.mobile-nav-link.active {
    color: var(--primary);
}

.mobile-nav-link.cta {
    margin-top: 24px;
    padding: 16px 24px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-md);
    text-align: center;
    border: none;
}

.mobile-divider {
    height: 1px;
    background: var(--border);
    margin: 8px 0;
}

@media (max-width: 992px) {
    .nav-links,
    .navbar-actions {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
    }
}

/* ========================================
   Hero Section
======================================== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    background: var(--gradient-dark);
    overflow: hidden;
}

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

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(79, 70, 229, 0.3) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(6, 182, 212, 0.2) 0%, transparent 50%);
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 32px 32px;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(79, 70, 229, 0.2);
    border: 1px solid rgba(79, 70, 229, 0.3);
    border-radius: 100px;
    font-size: 14px;
    color: #fff;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10B981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    line-height: 1.7;
}

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

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

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

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: rgba(255,255,255,0.2);
}

/* Hero Visual */
.hero-visual {
    position: relative;
}

.hero-card {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.card-dots {
    display: flex;
    gap: 6px;
}

.card-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
}

.card-dots span:first-child { background: #EF4444; }
.card-dots span:nth-child(2) { background: #F59E0B; }
.card-dots span:last-child { background: #10B981; }

/* ========================================
   Blog Page Styles - Premium Design
======================================== */

/* Blog Navigation - Optimized Layout */
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 992px) {
    .nav-container {
        padding: 0 20px;
    }
}

/* Enhanced Logo - Better Visibility */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #06B6D4 100%);
    border-radius: 10px;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.logo-text {
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #06B6D4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

/* Optimized Navigation Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    margin-right: 20px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    border-radius: 8px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.06);
}

.nav-link.active {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.1);
    font-weight: 600;
}

@media (max-width: 1100px) {
    .nav-links {
        gap: 4px;
    }
    .nav-link {
        padding: 8px 12px;
        font-size: 14px;
    }
}

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

/* Blog Section - Premium Styling */
.blog-section {
    padding: 60px 0 100px;
    background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100px);
}

/* Blog Filters - Enhanced Design */
.blog-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-gray);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.1);
}

.filter-btn.active {
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
}

/* Premium Blog Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* Premium Blog Card - High-End Design */
.blog-card {
    background: #fff;
    border-radius: 20px;
    padding: 32px;
    border: 1px solid #E8E8F0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4F46E5, #7C3AED, #06B6D4);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08), 0 8px 16px rgba(79, 70, 229, 0.06);
    border-color: rgba(79, 70, 229, 0.2);
}

.blog-card:hover::before {
    opacity: 1;
}

/* Card Tag - Premium Badge */
.card-tag {
    display: inline-block;
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(79, 70, 229, 0.08);
    border: 1px solid rgba(79, 70, 229, 0.18);
    border-radius: 6px;
    margin-bottom: 14px;
    letter-spacing: 0.3px;
}

/* Card Title - Enhanced Typography */
.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 12px;
}

.card-title a {
    color: inherit;
    transition: color 0.3s ease;
}

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

/* Card Excerpt - Better Readability */
.card-excerpt {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 24px;
}

/* Card Meta - Elegant Footer */
.card-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #F0F0F5;
}

.card-date {
    font-size: 14px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-date::before {
    content: '📅';
    font-size: 13px;
}

.card-readtime {
    font-size: 14px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-readtime::before {
    content: '⏱️';
    font-size: 13px;
}

/* Card Read More - Premium Button */
.card-readmore {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid rgba(79, 70, 229, 0.2);
    transition: all 0.3s ease;
    margin-top: 8px;
}

.card-readmore::after {
    content: '→';
    transition: transform 0.3s ease;
}

.card-readmore:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    gap: 12px;
}

.card-readmore:hover::after {
    transform: translateX(4px);
}

/* Hero Card Title */
.hero-card .card-title {
    font-size: 14px;
    color: rgba(255,255,255,0.95);
    font-weight: 600;
}

.card-body {
    padding: 24px;
}

.data-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.data-item {
    background: rgba(255,255,255,0.12);
    border-radius: var(--radius-md);
    padding: 16px;
    border: 1px solid rgba(255,255,255,0.15);
}

.data-value {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.data-label {
    font-size: 13px;
    color: rgba(255,255,255,0.85);
    font-weight: 500;
}

.data-trend {
    font-size: 12px;
    font-weight: 600;
    margin-top: 4px;
}

.data-trend.up {
    color: #10B981;
}

.chart-placeholder {
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 16px;
    height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    border: 1px solid rgba(255,255,255,0.1);
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 60px;
}

.chart-bars .bar {
    flex: 1;
    background: var(--gradient-primary);
    border-radius: 4px 4px 0 0;
    opacity: 0.7;
}

@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-stats {
        justify-content: center;
    }
    .hero-visual {
        display: none;
    }
    .hero-title {
        font-size: 40px;
    }
}

/* ========================================
   Section Common
======================================== */
.section {
    padding: 100px 0;
}

.section-light {
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header.light {
    color: #fff;
}

.section-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-gray);
    line-height: 1.7;
}

.section-header.light .section-title {
    color: #fff;
}

.section-header.light .section-subtitle {
    color: rgba(255,255,255,0.7);
}

/* ========================================
   Solutions Section
======================================== */
.solutions-section {
    padding: 100px 0;
    background: var(--bg-white);
}

/* Scenarios Tabs */
.scenes-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

.tab-icon {
    font-size: 20px;
}

/* Scene Content */
.scene-content {
    display: none;
}

.scene-content.active {
    display: block;
}

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

.scene-grid.reverse {
    direction: rtl;
}

.scene-grid.reverse > * {
    direction: ltr;
}

.scene-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
}

.scene-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.scene-desc {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 32px;
}

.scene-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.scene-features .feature-card {
    padding: 20px;
}

.scene-features .feature-card-icon {
    width: 44px;
    height: 44px;
    font-size: 20px;
}

.scene-features .feature-card-title {
    font-size: 16px;
}

.scene-features .feature-card-desc {
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 12px;
}

.scene-features .feature-card-tag {
    font-size: 11px;
    padding: 3px 10px;
}

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

.feature-icon {
    font-size: 32px;
    flex-shrink: 0;
}

.feature-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

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

.scene-benefits {
    display: flex;
    gap: 32px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
}

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

.benefit-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.benefit-label {
    font-size: 13px;
    color: var(--text-gray);
}

/* Image Frame */
.scene-image {
    position: relative;
}

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

.image-frame img {
    width: 100%;
    display: block;
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-frame:hover .image-overlay {
    opacity: 1;
}

.play-btn {
    width: 72px;
    height: 72px;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary);
    cursor: pointer;
}

.case-tag {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.case-logo {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

.case-result {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
}

@media (max-width: 992px) {
    .scene-grid {
        grid-template-columns: 1fr;
    }
    .scene-grid.reverse {
        direction: ltr;
    }
    .scene-image {
        order: -1;
    }
    .section-title {
        font-size: 32px;
    }
    .scene-title {
        font-size: 28px;
    }
}

/* ========================================
   Advantages Section
======================================== */
.why-section {
    padding: 100px 0;
    background: var(--gradient-dark);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.advantage-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s ease;
}

.advantage-card:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-4px);
}

.advantage-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.advantage-title {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.advantage-desc {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

@media (max-width: 992px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Partners Section
======================================== */
.partners-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.partners-grid {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.partner-logo {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.partner-logo.tencent { color: #2490eb; }
.partner-logo.polyv { color: #ff6b00; }
.partner-logo.huawei { color: #de2519; }

.partner-name {
    font-size: 14px;
    color: var(--text-gray);
}

/* ========================================
   Cases Section
======================================== */
.cases-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.case-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.case-image {
    position: relative;
    height: 200px;
    background: var(--gradient-primary);
    overflow: hidden;
}

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

.case-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    background: rgba(255,255,255,0.9);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
}

.case-content {
    padding: 24px;
}

.case-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.case-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.case-stats {
    display: flex;
    gap: 24px;
}

.case-stats .stat {
    text-align: center;
}

.case-stats .stat-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.case-stats .stat-label {
    font-size: 12px;
    color: var(--text-gray);
}

@media (max-width: 992px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   CTA Section
======================================== */
.cta-section {
    padding: 100px 0;
    background: var(--gradient-primary);
    text-align: center;
}

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

.cta-title {
    font-size: 40px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* ========================================
   Footer
======================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--bg-dark);
    color: rgba(255,255,255,0.8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    font-size: 28px;
}

.footer-logo .logo-text {
    font-size: 22px;
    font-weight: 700;
}

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

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

.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background 0.3s ease;
}

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

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

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.copyright {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Page Hero (Sub-pages)
======================================== */
.page-hero {
    position: relative;
    padding: 140px 0 80px;
    background: var(--gradient-dark);
}

.page-hero h1 {
    font-size: 52px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.page-hero-content {
    position: relative;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

.breadcrumb a {
    color: rgba(255,255,255,0.6);
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: #fff;
}

.breadcrumb .separator {
    color: rgba(255,255,255,0.3);
}

.breadcrumb .current {
    color: #fff;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
}

.scene-badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 100px;
    font-size: 14px;
    color: #fff;
    margin-bottom: 20px;
}

/* ========================================
   Pain Section
======================================== */
.pain-section {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.pain-card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all 0.3s ease;
}

.pain-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.pain-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.pain-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.pain-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

@media (max-width: 992px) {
    .pain-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .pain-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Solution Section
======================================== */
.solution-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.features-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}


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

.feature-grid.reverse {
    direction: rtl;
}

.feature-grid.reverse > * {
    direction: ltr;
}

.feature-visual {
    position: relative;
}

.feature-showcase {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.showcase-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border);
}

.showcase-body {
    padding: 24px;
}

.live-preview {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 16px;
}

.preview-main {
    position: relative;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    height: 200px;
    overflow: hidden;
}

.preview-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-info {
    position: absolute;
    bottom: 12px;
    left: 12px;
    right: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.live-tag {
    padding: 4px 10px;
    background: #EF4444;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

.viewer-count {
    padding: 4px 10px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    font-size: 12px;
    border-radius: 4px;
}

.preview-sidebar {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    font-size: 13px;
}

.item-emoji {
    font-size: 16px;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

@media (max-width: 992px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .feature-grid.reverse {
        direction: ltr;
    }
}

/* ========================================
   Feature Cards - New Design
======================================== */
.feature-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -12px rgba(79, 70, 229, 0.15);
    border-color: var(--primary-light);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.feature-card-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

.feature-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.3;
    margin-top: 4px;
}

.feature-card-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

.feature-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.feature-card-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    border: 1px solid rgba(79, 70, 229, 0.15);
}

.feature-card-tag.highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border-color: transparent;
}

@media (max-width: 768px) {
    .feature-cards {
        grid-template-columns: 1fr;
    }
    .feature-card {
        padding: 20px;
    }
}

/* ========================================
   Scenarios Section
======================================== */
.scenarios-section {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.scenario-card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s ease;
}

.scenario-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.scenario-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.scenario-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.scenario-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 16px;
}

.scenario-features {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.scenario-features li {
    font-size: 13px;
    color: var(--primary);
    padding-left: 16px;
    position: relative;
}

.scenario-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
}

@media (max-width: 992px) {
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Cases Showcase
======================================== */
.cases-showcase {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 32px;
}

.case-main {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.case-image {
    position: relative;
    height: 280px;
    background: var(--gradient-primary);
}

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

.case-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
}

.case-brand {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

.case-metrics {
    display: flex;
    gap: 32px;
}

.metric {
    text-align: left;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}

.metric-label {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
}

.case-story {
    padding: 24px;
}

.case-story h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.case-story p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

.cases-mini {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mini-case {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
}

.mini-case-brand {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.mini-case-result {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
}

.mini-case-result span {
    color: var(--primary);
}

@media (max-width: 992px) {
    .cases-showcase {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Testimonial Section
======================================== */
.testimonial-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
}

.testimonial-quote {
    font-size: 16px;
    color: var(--text-dark);
    line-height: 1.8;
    margin-bottom: 24px;
    position: relative;
    padding-left: 24px;
}

.testimonial-quote::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -8px;
    font-size: 48px;
    color: var(--primary);
    opacity: 0.3;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 18px;
}

.author-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.author-title {
    font-size: 13px;
    color: var(--text-gray);
}

@media (max-width: 992px) {
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Process Section
======================================== */
.process-section {
    padding: 100px 0;
    background: var(--bg-white);
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.process-step {
    text-align: center;
    flex: 1;
    max-width: 200px;
}

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

.step-num {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}

.step-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.step-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

.process-arrow {
    font-size: 24px;
    color: var(--primary);
    flex-shrink: 0;
}

@media (max-width: 992px) {
    .process-steps {
        flex-direction: column;
    }
    .process-arrow {
        transform: rotate(90deg);
    }
}

/* ========================================
   About Page Styles
======================================== */
.about-section {
    padding: 100px 0;
}

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

.intro-desc {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.intro-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tag {
    padding: 8px 16px;
    background: var(--bg-light);
    border-radius: 100px;
    font-size: 14px;
    color: var(--text-dark);
}

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

.stat-box {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
}

.stat-box .stat-num {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-box .stat-label {
    font-size: 14px;
    color: var(--text-gray);
}

@media (max-width: 992px) {
    .about-intro {
        grid-template-columns: 1fr;
    }
}

/* Qualifications */
.qualifications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.qual-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.qual-header {
    padding: 32px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.qual-header .logo {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.qual-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.qual-header p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

.qual-images {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.qual-img-item {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.qual-img-item img {
    width: 100%;
    display: block;
}

.img-caption {
    padding: 12px;
    font-size: 13px;
    color: var(--text-gray);
    text-align: center;
    background: var(--bg-light);
}

.qual-placeholder {
    padding: 40px;
    text-align: center;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.placeholder-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}

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

.placeholder-tip {
    font-size: 12px !important;
    color: var(--text-light) !important;
    margin-top: 8px;
}

.qual-note {
    margin-top: 40px;
    padding: 20px 24px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    text-align: center;
}

.qual-note p {
    font-size: 14px;
    color: var(--text-gray);
}

@media (max-width: 992px) {
    .qualifications-grid {
        grid-template-columns: 1fr;
    }
}

/* Capability Timeline */
.capability-timeline {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 24px;
    position: relative;
    padding-left: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 40px;
    bottom: -24px;
    width: 2px;
    background: var(--border);
}

.timeline-item:last-child::before {
    display: none;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* Contact Section */
.contact-section {
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-form-wrapper {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group .required {
    color: #EF4444;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all 0.3s ease;
}

.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(79, 70, 229, 0.1);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.info-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.info-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.info-item:last-child {
    border-bottom: none;
}

.info-icon {
    font-size: 24px;
}

.info-label {
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.info-value {
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 500;
}

@media (max-width: 992px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Related Section（相关阅读）
======================================== */
.related-section {
    padding: 80px 0;
    background: #fff;
}
.related-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
.related-card {
    display: block;
    background: linear-gradient(135deg, #f8f9fc, #fff);
    border: 1px solid #e8e8f0;
    border-radius: 16px;
    padding: 28px;
    text-decoration: none;
    transition: all 0.3s ease;
}
.related-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(79, 70, 229, 0.12);
}
.related-icon {
    font-size: 32px;
    margin-bottom: 12px;
}
.related-card h4 {
    font-size: 17px;
    color: #1a1a2e;
    margin: 0 0 10px;
    line-height: 1.4;
}
.related-card p {
    font-size: 14px;
    color: #666;
    margin: 0 0 14px;
    line-height: 1.6;
}
.related-read {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
}

/* ========================================
   FAQ Section
======================================== */
.faq-section {
    padding: 80px 0;
    background: #f8f9fc;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border-radius: 12px;
    padding: 24px 28px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.faq-q {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-q::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-a {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.8;
    padding-left: 34px;
    display: none;
}

.faq-item.open .faq-a {
    display: block;
}

.faq-item.open .faq-q::before {
    background: var(--color-primary);
}

/* ========================================
   Animation
======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ========================================
   移动端全面兼容修复（2026-04-15）
======================================== */

/* ---- 基础移动端重置 ---- */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    body {
        font-size: 15px;
        overflow-x: hidden;
    }

    .container {
        padding: 0 16px;
    }

    /* ---- Hero 移动端 ---- */
    .hero {
        padding: 80px 0 60px;
        min-height: auto;
    }

    .hero-content {
        padding: 0;
        max-width: 100%;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 12px;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .hero h1 {
        font-size: 1.8rem !important;
        line-height: 1.3;
        word-break: break-word;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
        gap: 12px;
        margin-bottom: 32px;
    }

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

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
        justify-content: flex-start;
    }

    .stat-item {
        min-width: 80px;
    }

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

    .stat-divider {
        display: none;
    }

    /* ---- 通用区块移动端 ---- */
    section {
        padding: 60px 0;
    }

    .section-header {
        padding: 0 16px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 0.9rem;
    }

    /* ---- 卡片网格移动端 ---- */
    .solutions-grid,
    .products-grid,
    .features-grid,
    .blog-grid,
    .qualifications-grid,
    .process-grid {
        grid-template-columns: 1fr !important;
        gap: 16px;
        padding: 0 16px;
    }

    /* ---- 表格移动端 ---- */
    table {
        font-size: 13px;
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table th,
    table td {
        padding: 10px 8px;
        white-space: nowrap;
    }

    /* ---- 导航栏移动端 ---- */
    .navbar-content {
        height: 60px;
    }

    .mobile-menu {
        top: 60px;
        height: calc(100vh - 60px);
    }

    /* ---- Footer 移动端 ---- */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    /* ---- 按钮移动端 ---- */
    .btn-lg {
        padding: 14px 24px;
        font-size: 15px;
    }

    /* ---- 表单移动端 ---- */
    .contact-form-wrapper {
        padding: 24px 16px;
        margin: 0 16px;
    }

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

    textarea,
    input,
    select {
        font-size: 16px; /* 防止iOS自动缩放 */
    }

    /* ---- 资质卡片移动端 ---- */
    .qual-card {
        padding: 20px;
    }

    .qual-images {
        flex-direction: column;
    }

    /* ---- 时间线移动端 ---- */
    .capability-timeline {
        padding: 0 16px;
    }

    .timeline-item {
        flex-direction: column;
        gap: 12px;
    }

    /* ---- 统计数字移动端 ---- */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    /* ---- 特性列表移动端 ---- */
    .feature-list {
        grid-template-columns: 1fr;
    }

    /* ---- Tab切换移动端 ---- */
    .tab-buttons {
        flex-wrap: wrap;
        gap: 8px;
    }

    .tab-btn {
        flex: 1 1 auto;
        min-width: 120px;
        text-align: center;
    }

    /* ---- 工具列表移动端 ---- */
    .tool-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    /* ---- 博客文章移动端 ---- */
    .blog-card {
        padding: 16px;
    }

    /* ---- FAQ移动端 ---- */
    .faq-item {
        padding: 16px;
    }

    /* ---- 价格表格移动端 ---- */
    .pricing-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* ---- 场景页面移动端 ---- */
    .scene-hero {
        padding: 100px 0 50px;
    }

    .scene-content {
        padding: 0 16px;
    }

    .scene-content h2 {
        font-size: 1.5rem;
    }

    /* ---- 图片自适应 ---- */
    img {
        max-width: 100%;
        height: auto;
        object-fit: cover;
    }

    /* ---- 隐藏移动端不需要的元素 ---- */
    .desktop-only {
        display: none !important;
    }
}

/* ---- 小屏手机额外修复（<= 375px）---- */
@media (max-width: 375px) {
    .hero h1 {
        font-size: 1.6rem !important;
    }

    .section-title {
        font-size: 1.3rem;
    }

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

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

    .tab-btn {
        min-width: 100px;
        font-size: 13px;
        padding: 10px 12px;
    }
}

/* ---- 平板横屏适配（768px - 1024px）---- */
@media (min-width: 769px) and (max-width: 1024px) {
    .solutions-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero h1 {
        font-size: 2.2rem;
    }
}

/* ---- iOS Safari 安全区域 ---- */
@supports (padding: env(safe-area-inset-bottom)) {
    .mobile-menu {
        padding-bottom: calc(24px + env(safe-area-inset-bottom));
    }

    .footer {
        padding-bottom: env(safe-area-inset-bottom);
    }
}
/* Blog Page Specific Styles */
.blog-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 20px;
}

.blog-search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.blog-search input {
    width: 100%;
    padding: 12px 40px 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: all 0.3s;
}

.blog-search input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
}

.blog-filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid var(--border);
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    color: var(--text-gray);
}

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

.blog-category-section {
    margin-bottom: 60px;
}

.category-header {
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.category-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.category-title-wrap {
    flex: 1;
}

.category-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-title::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), transparent);
    margin-left: 12px;
}

.category-desc {
    color: var(--text-gray);
    font-size: 15px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

@media (max-width: 900px) {
    .blog-grid { grid-template-columns: 1fr; }
}

.blog-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s;
}

.blog-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.12), 0 8px 16px rgba(0,0,0,0.06);
    border-color: rgba(79, 70, 229, 0.25);
}

.blog-card:hover::before {
    opacity: 1;
}

.card-tag {
    display: inline-block;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    color: white;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 16px;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
}

.card-title a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.3s;
}

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

.card-excerpt {
    color: var(--text-gray);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    gap: 16px;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.card-readmore {
    display: inline-flex;
    align-items: center;
    color: var(--primary);
    font-weight: 500;
    font-size: 15px;
    transition: gap 0.3s;
}

.card-readmore:hover {
    gap: 8px;
}

/* ========================================
   Blog Page - Complete Styles
   (Search, Filter, Featured, Categories)
======================================== */

/* Search Bar */
.search-bar {
    position: relative;
    max-width: 480px;
    margin: 0 auto 40px;
}

.search-bar input {
    width: 100%;
    padding: 16px 20px 16px 52px;
    font-size: 16px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--bg-white);
    transition: all 0.3s ease;
    outline: none;
}

.search-bar input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-light);
}

/* Category Filter */
.category-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-gray);
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.filter-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
}

/* Featured Section */
.featured-section {
    margin-bottom: 60px;
}

.featured-section .section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

@media (max-width: 768px) {
    .featured-grid {
        grid-template-columns: 1fr;
    }
}

/* Featured Card */
.featured-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.featured-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.featured-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(79, 70, 229, 0.08);
    border-color: rgba(79, 70, 229, 0.25);
}

.featured-card:hover::before {
    opacity: 1;
}

.featured-card .card-category {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 6px;
    margin-bottom: 12px;
}

.featured-card .card-title {
    font-size: 22px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 14px;
}

.featured-card .card-title a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.3s ease;
}

.featured-card .card-title a:hover {
    color: var(--primary);
}

.featured-card .card-excerpt {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 20px;
}

.featured-card .card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.featured-card .read-time {
    font-size: 14px;
    color: var(--text-light);
}

.featured-card .read-more {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.featured-card .read-more:hover {
    gap: 8px;
    transform: translateX(4px);
}

/* All Articles Section */
.all-articles-section .section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Card Category Badge */
.card-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

.card-date::before {
    content: '';
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.read-time {
    font-size: 13px;
    color: var(--text-light);
}

.read-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.read-more:hover {
    color: var(--primary-dark);
}

/* Blog Section Override for Correct Stacking */
.blog-section {
    padding: 40px 0 100px;
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100px);
    position: relative;
    z-index: 1;
}

/* Page Hero Fix */
.page-hero {
    background: var(--gradient-dark);
    min-height: 280px;
}

/* Ensure proper content flow */
.blog-section::before {
    content: '';
    display: block;
    height: 40px;
    margin-top: -40px;
}