/* ============================================================
 * 宇橙智慧企业平台 - 橙色主题 v1.0.0
 * 基于宇橙UI规范标准
 * 主色调：宇橙橙 (#f97316)
 * ============================================================ */

/* ==================== 橙色主题CSS变量 ==================== */
:root {
    /* ====== 主色系 - 宇橙橙 ====== */
    --ucon-primary: #f97316;
    --ucon-primary-dark: #ea580c;
    --ucon-primary-darker: #c2410c;
    --ucon-primary-light: #fed7aa;
    --ucon-primary-lighter: #fff7ed;
    --ucon-primary-bg: #fff7ed;

    /* 宇橙橙渐变色阶 */
    --ucon-orange-50: #fff7ed;
    --ucon-orange-100: #ffedd5;
    --ucon-orange-200: #fed7aa;
    --ucon-orange-300: #fdba74;
    --ucon-orange-400: #fb923c;
    --ucon-orange-500: #f97316;
    --ucon-orange-600: #ea580c;
    --ucon-orange-700: #c2410c;
    --ucon-orange-800: #9a3412;
    --ucon-orange-900: #7c2d12;

    /* 功能色 */
    --ucon-success: #16a34a;
    --ucon-success-light: #dcfce7;
    --ucon-warning: #d97706;
    --ucon-warning-light: #fef3c7;
    --ucon-danger: #dc2626;
    --ucon-danger-light: #fee2e2;
    --ucon-info: #0891b2;
    --ucon-info-light: #cffafe;

    /* 文字色 */
    --ucon-text: #1e293b;
    --ucon-text-secondary: #475569;
    --ucon-text-muted: #94a3b8;
    --ucon-text-light: #cbd5e1;

    /* 边框和背景 */
    --ucon-border: #e2e8f0;
    --ucon-border-light: #f1f5f9;
    --ucon-border-dark: #cbd5e1;

    --ucon-bg: #ffffff;
    --ucon-bg-gray: #f8fafc;
    --ucon-bg-dark: #0f172a;

    /* 阴影系统 */
    --ucon-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --ucon-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --ucon-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --ucon-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --ucon-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --ucon-shadow-orange: 0 10px 25px -5px rgba(249,115,22,0.25);
    --ucon-shadow-orange-lg: 0 20px 40px -10px rgba(249,115,22,0.35);

    /* 圆角系统 */
    --ucon-radius-sm: 4px;
    --ucon-radius: 6px;
    --ucon-radius-md: 8px;
    --ucon-radius-lg: 12px;
    --ucon-radius-xl: 16px;
    --ucon-radius-full: 9999px;

    /* 过渡动画 */
    --ucon-transition-fast: 0.15s ease;
    --ucon-transition: 0.25s ease;
    --ucon-transition-slow: 0.35s ease;

    /* 字体大小 */
    --ucon-font-xs: 11px;
    --ucon-font-sm: 12px;
    --ucon-font-base: 14px;
    --ucon-font-md: 15px;
    --ucon-font-lg: 16px;
    --ucon-font-xl: 18px;
    --ucon-font-2xl: 24px;
    --ucon-font-3xl: 30px;
    --ucon-font-4xl: 36px;
    --ucon-font-5xl: 48px;
    --ucon-font-6xl: 60px;

    /* 间距 */
    --ucon-spacing-xs: 4px;
    --ucon-spacing-sm: 8px;
    --ucon-spacing-md: 12px;
    --ucon-spacing-base: 16px;
    --ucon-spacing-lg: 20px;
    --ucon-spacing-xl: 24px;
    --ucon-spacing-2xl: 32px;
    --ucon-spacing-3xl: 48px;
}

/* ==================== 全局基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

a {
    color: var(--ucon-primary);
    text-decoration: none;
    transition: var(--ucon-transition);
}
a:hover {
    color: var(--ucon-primary-dark);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 橙色按钮系统 ==================== */
.ucon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: var(--ucon-font-base);
    font-weight: 600;
    border-radius: var(--ucon-radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--ucon-transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.ucon-btn-primary {
    background: linear-gradient(135deg, var(--ucon-primary) 0%, var(--ucon-primary-dark) 100%);
    color: white;
    box-shadow: var(--ucon-shadow-orange);
}
.ucon-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--ucon-shadow-orange-lg);
}

.ucon-btn-outline {
    background: transparent;
    color: var(--ucon-primary);
    border: 2px solid var(--ucon-primary);
}
.ucon-btn-outline:hover {
    background: var(--ucon-primary-bg);
    transform: translateY(-2px);
}

.ucon-btn-ghost {
    background: transparent;
    color: var(--ucon-text-secondary);
}
.ucon-btn-ghost:hover {
    background: var(--ucon-bg-gray);
    color: var(--ucon-primary);
}

.ucon-btn-lg {
    padding: 14px 36px;
    font-size: var(--ucon-font-lg);
    border-radius: var(--ucon-radius-lg);
}

.ucon-btn-sm {
    padding: 6px 16px;
    font-size: var(--ucon-font-sm);
}

/* ==================== 卡片组件 ==================== */
.ucon-card {
    background: var(--ucon-bg);
    border-radius: var(--ucon-radius-lg);
    border: 1px solid var(--ucon-border);
    padding: var(--ucon-spacing-xl);
    transition: all var(--ucon-transition-slow);
}
.ucon-card:hover {
    box-shadow: var(--ucon-shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}

/* ==================== Header 导航栏 ==================== */
.site-header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--ucon-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--ucon-transition);
}

.site-header.scrolled {
    box-shadow: var(--ucon-shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--ucon-primary);
    letter-spacing: -0.5px;
    text-decoration: none;
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    border-radius: var(--ucon-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    font-size: 18px;
}

.main-nav {
    display: flex;
    gap: 4px;
    align-items: center;
}

.nav-link {
    padding: 10px 18px;
    font-size: var(--ucon-font-base);
    font-weight: 500;
    color: var(--ucon-text-secondary);
    border-radius: var(--ucon-radius-md);
    transition: all var(--ucon-transition);
    position: relative;
}
.nav-link:hover,
.nav-link.active {
    color: var(--ucon-primary);
    background: var(--ucon-primary-bg);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--ucon-primary);
    border-radius: 2px;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--ucon-text);
    border-radius: 2px;
    transition: all var(--ucon-transition);
}

/* ==================== Hero Banner 首屏横幅 ==================== */
.hero-banner {
    position: relative;
    background: linear-gradient(135deg, #fff7ed 0%, #ffffff 50%, #fef3c7 100%);
    min-height: 650px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: orbFloat 8s ease-in-out infinite alternate;
}
.hero-gradient-orb.orb1 {
    width: 550px; height: 550px;
    top: -150px; right: -120px;
    background: radial-gradient(circle, rgba(249,115,22,0.3), transparent 70%);
}
.hero-gradient-orb.orb2 {
    width: 400px; height: 400px;
    bottom: -100px; left: -80px;
    background: radial-gradient(circle, rgba(251,146,60,0.25), transparent 70%);
    animation-delay: -4s;
}
.hero-gradient-orb.orb3 {
    width: 250px; height: 250px;
    top: 45%; left: 42%;
    background: radial-gradient(circle, rgba(234,88,12,0.2), transparent 70%);
    animation-delay: -2s;
}

@keyframes orbFloat {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.15) translate(20px, -20px); }
}

.hero-grid-pattern {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(rgba(249,115,22,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(249,115,22,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 25s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 90px 20px 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    color: var(--ucon-text);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--ucon-primary-bg);
    border: 1px solid var(--ucon-primary-light);
    border-radius: var(--ucon-radius-full);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 28px;
    letter-spacing: 0.5px;
    color: var(--ucon-primary-dark);
    animation: badgePulse 3s ease-in-out infinite alternate;
}
.hero-badge::before {
    content: '🍊';
    font-size: 16px;
}

@keyframes badgePulse {
    0% { box-shadow: 0 0 0 0 rgba(249,115,22,0.2); }
    100% { box-shadow: 0 0 0 8px rgba(249,115,22,0); }
}

.hero-title {
    font-size: 54px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--ucon-text) 0%, var(--ucon-primary) 60%, var(--ucon-primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: titleGradient 6s ease-in-out infinite;
}

@keyframes titleGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.85;
    margin-bottom: 36px;
    color: var(--ucon-text-secondary);
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.btn-hero-main {
    padding: 16px 38px;
    background: linear-gradient(135deg, var(--ucon-primary) 0%, var(--ucon-primary-dark) 100%);
    color: white;
    border-radius: var(--ucon-radius-lg);
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.3px;
    box-shadow: var(--ucon-shadow-orange);
}
.btn-hero-main::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
    transition: left 0.5s ease;
}
.btn-hero-main:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--ucon-shadow-orange-lg);
}
.btn-hero-main:hover::before {
    left: 100%;
}

.btn-hero-secondary {
    padding: 16px 34px;
    background: white;
    color: var(--ucon-text-secondary);
    border: 2px solid var(--ucon-border);
    border-radius: var(--ucon-radius-lg);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.35s ease;
    letter-spacing: 0.3px;
}
.btn-hero-secondary:hover {
    border-color: var(--ucon-primary);
    color: var(--ucon-primary);
    background: var(--ucon-primary-bg);
    transform: translateY(-3px);
    box-shadow: var(--ucon-shadow-md);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-item {
    text-align: center;
    padding: 20px 14px;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    border: 1px solid var(--ucon-border-light);
    border-radius: var(--ucon-radius-lg);
    transition: all 0.35s ease;
}
.stat-item:hover {
    border-color: var(--ucon-primary-light);
    background: white;
    transform: translateY(-3px);
    box-shadow: var(--ucon-shadow);
}
.stat-number {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label {
    font-size: 12px;
    color: var(--ucon-text-muted);
    margin-top: 4px;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    width: 480px;
    height: 380px;
    background: linear-gradient(145deg, rgba(255,255,255,0.95), rgba(255,247,237,0.85));
    border-radius: 24px;
    backdrop-filter: blur(20px);
    border: 1px solid var(--ucon-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: floatVisual 7s ease-in-out infinite;
    position: relative;
    overflow: hidden;
    box-shadow: var(--ucon-shadow-xl), 0 0 0 1px rgba(249,115,22,0.05);
}
.hero-image-wrapper::before {
    content: '';
    position: absolute;
    top: -50%; right: -50%;
    width: 100%; height: 100%;
    background: conic-gradient(from 0deg, transparent, rgba(249,115,22,0.1), transparent 30%);
    animation: rotateBorder 10s linear infinite;
}

@keyframes floatVisual {
    0%, 100% { transform: translateY(0) rotateY(0deg); }
    50% { transform: translateY(-20px) rotateY(3deg); }
}

@keyframes rotateBorder {
    100% { transform: rotate(360deg); }
}

/* ==================== Features Section 功能特性区 ==================== */
.features-section {
    padding: 96px 20px;
    background: linear-gradient(180deg, #ffffff 0%, var(--ucon-bg-gray) 100%);
    position: relative;
}

.section-container {
    max-width: 1180px;
    margin: 0 auto;
}

.section-header-center {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 8px 24px;
    background: var(--ucon-primary-bg);
    color: var(--ucon-primary-dark);
    border-radius: var(--ucon-radius-full);
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 1px;
    border: 1px solid var(--ucon-primary-light);
}

.section-title-lg {
    font-size: 40px;
    font-weight: 800;
    color: var(--ucon-text);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--ucon-text-secondary);
    max-width: 620px;
    margin: 0 auto;
    line-height: 1.75;
}

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

.feature-card {
    background: white;
    border-radius: var(--ucon-radius-xl);
    padding: 36px 30px;
    border: 1px solid var(--ucon-border);
    transition: all 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--ucon-primary), var(--ucon-primary-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.feature-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(249,115,22,0.05), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}
.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--ucon-shadow-lg), 0 0 0 1px var(--ucon-primary-light);
    border-color: transparent;
}
.feature-card:hover::before {
    transform: scaleX(1);
}
.feature-card:hover::after {
    opacity: 1;
}

.feature-icon-wrap {
    width: 68px;
    height: 68px;
    border-radius: var(--ucon-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
}
.feature-icon-shape {
    width: 34px; height: 34px;
    border-radius: var(--ucon-radius);
    transition: all 0.4s ease;
}

.feature-icon-wrap.orange {
    background: linear-gradient(135deg, var(--ucon-orange-50), var(--ucon-orange-100));
}
.feature-icon-wrap.orange .feature-icon-shape {
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
}

.feature-icon-wrap.green {
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
}
.feature-icon-wrap.green .feature-icon-shape {
    background: linear-gradient(135deg, #059669, #10b981);
}

.feature-icon-wrap.purple {
    background: linear-gradient(135deg, #faf5ff, #ede9fe);
}
.feature-icon-wrap.purple .feature-icon-shape {
    background: linear-gradient(135deg, #7c3aed, #8b5cf6);
}

.feature-icon-wrap.blue {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
}
.feature-icon-wrap.blue .feature-icon-shape {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
}

.feature-icon-wrap.cyan {
    background: linear-gradient(135deg, #ecfeff, #cffafe);
}
.feature-icon-wrap.cyan .feature-icon-shape {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
}

.feature-icon-wrap.red {
    background: linear-gradient(135deg, #fef2f2, #fecaca);
}
.feature-icon-wrap.red .feature-icon-shape {
    background: linear-gradient(135deg, #dc2626, #ef4444);
}

.feature-card:hover .feature-icon-shape {
    transform: rotate(180deg) scale(1.15);
}

.feature-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--ucon-text);
    margin-bottom: 12px;
    letter-spacing: -0.2px;
}

.feature-desc {
    font-size: 14px;
    color: var(--ucon-text-secondary);
    line-height: 1.75;
}

/* ==================== Products Section 产品展示区 ==================== */
.products-section {
    padding: 96px 20px;
    background: white;
    position: relative;
}
.products-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--ucon-primary-light), transparent);
}

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

.product-card-new {
    background: white;
    border-radius: var(--ucon-radius-xl);
    border: 1px solid var(--ucon-border);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
}
.product-card-new::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--ucon-radius-xl);
    padding: 1px;
    background: linear-gradient(135deg, transparent 40%, rgba(249,115,22,0.3), transparent 60%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.product-card-new:hover {
    transform: translateY(-10px);
    box-shadow: var(--ucon-shadow-lg);
}
.product-card-new:hover::before {
    opacity: 1;
}

.product-img-wrapper {
    position: relative;
    width: 100%;
    height: 210px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--ucon-bg-gray), var(--ucon-border-light));
}
.product-img-new {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.product-card-new:hover .product-img-new {
    transform: scale(1.08);
}

.product-info-new {
    padding: 20px;
}

.product-name-new {
    font-size: 16px;
    font-weight: 700;
    color: var(--ucon-text);
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-price-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.price-current {
    font-size: 20px;
    font-weight: 800;
    color: var(--ucon-primary);
}

.price-original {
    font-size: 13px;
    color: var(--ucon-text-muted);
    text-decoration: line-through;
}

.product-desc-short {
    font-size: 13px;
    color: var(--ucon-text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== Systems Showcase 系统展示区 ==================== */
.systems-showcase {
    padding: 96px 20px;
    background: linear-gradient(180deg, var(--ucon-bg-gray) 0%, white 100%);
    position: relative;
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 56px;
}

.system-card {
    background: white;
    border-radius: var(--ucon-radius-xl);
    padding: 40px 32px;
    border: 2px solid var(--ucon-border);
    transition: all 0.45s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}
.system-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--card-color, var(--ucon-primary)), var(--card-color-dark, var(--ucon-primary-dark)));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.system-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--ucon-shadow-xl), 0 0 40px rgba(249,115,22,0.1);
    border-color: transparent;
}
.system-card:hover::before {
    transform: scaleY(1);
}

.system-icon-large {
    width: 76px;
    height: 76px;
    border-radius: var(--ucon-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 36px;
    background: var(--card-bg, var(--ucon-primary-bg));
    transition: all 0.4s ease;
}
.system-card:hover .system-icon-large {
    transform: scale(1.1) rotate(-5deg);
}

.system-title {
    font-size: 22px;
    font-weight: 800;
    color: var(--ucon-text);
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}

.system-description {
    font-size: 14px;
    color: var(--ucon-text-secondary);
    line-height: 1.75;
    margin-bottom: 20px;
}

.system-features-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.system-features-list li {
    padding: 6px 0;
    font-size: 13px;
    color: var(--ucon-text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.system-features-list li::before {
    content: '✓';
    color: var(--ucon-success);
    font-weight: 700;
    font-size: 14px;
}

.system-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    padding: 10px 24px;
    background: var(--card-color, var(--ucon-primary));
    color: white;
    border-radius: var(--ucon-radius-md);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--ucon-transition);
}
.system-action-btn:hover {
    background: var(--card-color-dark, var(--ucon-primary-dark));
    transform: translateX(4px);
}

/* 系统卡片颜色变体 */
.system-card.chat { --card-color: #2563eb; --card-color-dark: #1d4ed8; --card-bg: #eff6ff; }
.system-card.exam { --card-color: #7c3aed; --card-color-dark: #6d28d9; --card-bg: #faf5ff; }
.system-card.oa { --card-color: #059669; --card-color-dark: #047857; --card-bg: #ecfdf5; }
.system-card.ai { --card-color: #dc2626; --card-color-dark: #b91c1c; --card-bg: #fef2f2; }
.system-card.ycbook { --card-color: #0891b2; --card-color-dark: #0e7490; --card-bg: #ecfeff; }

/* ==================== CTA Section 行动召唤区 ==================== */
.cta-section {
    padding: 96px 20px;
    background: linear-gradient(135deg, var(--ucon-primary) 0%, var(--ucon-primary-dark) 50%, #c2410c 100%);
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 44px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.cta-subtitle {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: 36px;
    line-height: 1.7;
}

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

.btn-cta-white {
    padding: 16px 40px;
    background: white;
    color: var(--ucon-primary-dark);
    border-radius: var(--ucon-radius-lg);
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.35s ease;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.btn-cta-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.btn-cta-outline {
    padding: 16px 40px;
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: var(--ucon-radius-lg);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.35s ease;
}
.btn-cta-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: white;
    transform: translateY(-3px);
}

/* ==================== Footer 页脚 ==================== */
.site-footer {
    background: var(--ucon-bg-dark);
    color: var(--ucon-text-light);
    padding: 64px 20px 32px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.footer-brand {
    color: white;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--ucon-primary);
    margin-bottom: 16px;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.75;
    color: var(--ucon-text-muted);
    margin-top: 16px;
}

.footer-column h3 {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
    padding: 0;
}
.footer-links li {
    margin-bottom: 12px;
}
.footer-links a {
    color: var(--ucon-text-muted);
    font-size: 14px;
    transition: var(--ucon-transition);
}
.footer-links a:hover {
    color: var(--ucon-primary);
}

.footer-bottom {
    max-width: 1200px;
    margin: 48px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 13px;
    color: var(--ucon-text-muted);
}

/* ==================== Chat Widget 客服聊天组件 ==================== */
.chat-widget {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
}

.chat-widget-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(249,115,22,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    animation: chatBtnPulse 2s ease-in-out infinite;
}
.chat-widget-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(249,115,22,0.5);
}
.chat-widget-btn svg {
    width: 28px;
    height: 28px;
    fill: white;
}

@keyframes chatBtnPulse {
    0%, 100% { box-shadow: 0 8px 24px rgba(249,115,22,0.4); }
    50% { box-shadow: 0 8px 24px rgba(249,115,22,0.4), 0 0 0 12px rgba(249,115,22,0.1); }
}

.chat-notification-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 14px;
    height: 14px;
    background: #ef4444;
    border-radius: 50%;
    border: 2px solid white;
    animation: notificationBlink 1.5s ease-in-out infinite;
}

@keyframes notificationBlink {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.9); }
}

.chat-window {
    position: absolute;
    bottom: 72px;
    right: 0;
    width: 380px;
    height: 520px;
    background: white;
    border-radius: var(--ucon-radius-xl);
    box-shadow: var(--ucon-shadow-xl);
    border: 1px solid var(--ucon-border);
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: chatWindowSlideUp 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.chat-window.active {
    display: flex;
}

@keyframes chatWindowSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.chat-window-header {
    padding: 20px 24px;
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-window-title {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-close-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--ucon-transition);
}
.chat-close-btn:hover {
    background: rgba(255,255,255,0.3);
}

.chat-messages-area {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: var(--ucon-bg-gray);
}

.chat-message {
    margin-bottom: 16px;
    display: flex;
    gap: 10px;
}
.chat-message.bot {
    flex-direction: row;
}
.chat-message.user {
    flex-direction: row-reverse;
}

.chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.chat-message.bot .chat-avatar {
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    color: white;
}
.chat-message.user .chat-avatar {
    background: var(--ucon-border);
    color: var(--ucon-text);
}

.chat-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: var(--ucon-radius-lg);
    font-size: 14px;
    line-height: 1.6;
}
.chat-message.bot .chat-bubble {
    background: white;
    color: var(--ucon-text);
    border: 1px solid var(--ucon-border);
    border-top-left-radius: 4px;
}
.chat-message.user .chat-bubble {
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    color: white;
    border-top-right-radius: 4px;
}

.chat-input-area {
    padding: 16px 20px;
    background: white;
    border-top: 1px solid var(--ucon-border);
    display: flex;
    gap: 10px;
}

.chat-input-field {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--ucon-border);
    border-radius: var(--ucon-radius-lg);
    font-size: 14px;
    outline: none;
    transition: var(--ucon-transition);
}
.chat-input-field:focus {
    border-color: var(--ucon-primary);
    box-shadow: 0 0 0 3px rgba(249,115,22,0.1);
}

.chat-send-btn {
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--ucon-primary), var(--ucon-primary-dark));
    color: white;
    border: none;
    border-radius: var(--ucon-radius-lg);
    cursor: pointer;
    font-weight: 600;
    transition: var(--ucon-transition);
}
.chat-send-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--ucon-shadow-orange);
}

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

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-image-wrapper {
        width: 380px;
        height: 300px;
    }

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

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

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

@media screen and (max-width: 768px) {
    .main-nav {
        display: none;
    }

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

    .hero-banner {
        min-height: auto;
        padding: 60px 0;
    }

    .hero-content {
        padding: 40px 20px;
    }

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

    .section-title-lg {
        font-size: 30px;
    }

    .cta-title {
        font-size: 32px;
    }

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

    .chat-window {
        width: calc(100vw - 48px);
        height: calc(100vh - 120px);
        right: -12px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    .header-inner {
        height: 60px;
    }

    .logo {
        font-size: 18px;
    }

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

    .btn-hero-main,
    .btn-hero-secondary {
        padding: 14px 28px;
        font-size: 14px;
    }

    .stat-item {
        padding: 14px 10px;
    }

    .stat-number {
        font-size: 24px;
    }
}