/* ============================================
   企服集团官网 - 专业企业服务网站样式
   设计风格：现代、专业、可信赖
   色彩方案：蓝绿色系（科技感+信任感）
   ============================================ */

/* CSS Variables - 主题变量 */
:root {
    /* 主色调 */
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    
    /* 辅助色 */
    --accent: #10b981;
    --accent-dark: #059669;
    --accent-light: #34d399;
    
    /* 中性色 */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 功能色 */
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --gradient-dark: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    --gradient-light: linear-gradient(135deg, var(--primary-50) 0%, #ffffff 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-primary: 0 10px 40px -10px var(--primary);
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* 间距 */
    --section-padding: 6rem 0;
    --container-max-width: 1200px;
    
    /* 字体 */
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-display: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary-dark);
}

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

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

ul, ol {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.25rem 1rem;
    background: var(--primary-100);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   顶部信息栏
   ============================================ */
.top-bar {
    background: var(--gray-900);
    color: var(--gray-400);
    font-size: 0.8125rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.top-bar-left {
    display: flex;
    gap: 2rem;
}

.top-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.top-item:hover {
    color: var(--gray-200);
}

.top-item .icon {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.top-bar-right {
    display: flex;
    gap: 1.5rem;
}

.wechat-btn {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

.wechat-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ============================================
   主导航
   ============================================ */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-100);
    transition: all var(--transition-base);
}

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

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--gray-900);
    flex-shrink: 0;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '';
    position: absolute;
    inset: 2px;
    background: white;
    border-radius: calc(var(--radius-lg) - 2px);
}

.logo-text {
    position: relative;
    z-index: 1;
    font-size: 1.25rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-info {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
}

.logo-slogan {
    font-size: 0.6875rem;
    color: var(--gray-500);
    letter-spacing: 0.05em;
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    color: var(--gray-700);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary);
    background: var(--primary-50);
}

.nav-link.active {
    color: var(--primary);
    background: var(--primary-50);
}

.dropdown-icon {
    width: 16px;
    height: 16px;
    fill: currentColor;
    transition: transform var(--transition-fast);
}

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-100);
    padding: 0.5rem;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

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

.nav-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu li a {
    display: block;
    padding: 0.625rem 1rem;
    color: var(--gray-700);
    font-size: 0.875rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.dropdown-menu li a:hover {
    background: var(--primary-50);
    color: var(--primary);
}

/* Nav CTA */
.nav-cta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-primary);
    flex-shrink: 0;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 44px -14px var(--primary);
    color: white;
}

.nav-cta svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

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

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

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

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumb {
    background: var(--gray-50);
    padding: 0.75rem 0;
    font-size: 0.875rem;
}

.breadcrumb ol {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb li:not(:last-child)::after {
    content: '/';
    color: var(--gray-400);
}

.breadcrumb a {
    color: var(--gray-500);
}

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

/* ============================================
   Hero区域
   ============================================ */
.hero {
    position: relative;
    padding: 6rem 0 4rem;
    overflow: hidden;
    background: var(--gradient-light);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

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

.hero-particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, var(--primary-200) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--accent-light) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, var(--primary-100) 0%, transparent 70%);
    opacity: 0.5;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--gray-700);
}

.badge-icon {
    font-size: 1.25rem;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.counter {
    font-weight: 700;
    color: var(--primary);
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 44px -14px var(--primary);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--gray-700);
    border: 2px solid var(--gray-200);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-50);
}

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

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: var(--primary-dark);
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.0625rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 0.25rem;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform var(--transition-slow);
}

.hero-card:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.card-header {
    background: var(--gradient-dark);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.card-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.card-dots span:nth-child(1) { background: #ef4444; }
.card-dots span:nth-child(2) { background: #f59e0b; }
.card-dots span:nth-child(3) { background: #22c55e; }

.card-title {
    color: var(--gray-400);
    font-size: 0.8125rem;
}

.card-body {
    padding: 1.5rem;
}

.calc-step h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.calc-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.calc-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--gray-50);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
}

.calc-option:hover {
    border-color: var(--primary-200);
    background: var(--primary-50);
}

.calc-option.active {
    border-color: var(--primary);
    background: var(--primary-50);
    color: var(--primary);
}

.option-icon {
    font-size: 1.5rem;
}

.calc-result {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

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

.result-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.result-price strong {
    font-size: 2rem;
}

.result-time {
    font-weight: 600;
    color: var(--gray-800);
}

.calc-result .btn {
    margin-top: 1rem;
}

/* ============================================
   优势条
   ============================================ */
.advantages-bar {
    background: white;
    padding: 2rem 0;
    border-bottom: 1px solid var(--gray-100);
}

.advantages-bar .container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.advantage-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.advantage-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.advantage-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--primary);
}

.advantage-text {
    display: flex;
    flex-direction: column;
}

.advantage-text strong {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
}

.advantage-text span {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

/* ============================================
   核心服务
   ============================================ */
.services {
    padding: var(--section-padding);
    background: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
    border: 1px solid var(--gray-100);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

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

.service-card.featured:hover {
    box-shadow: var(--shadow-2xl);
}

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-50);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: all var(--transition-base);
}

.service-card:hover .card-icon {
    background: var(--gradient-primary);
    transform: scale(1.1);
}

.card-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--primary);
    transition: fill var(--transition-base);
}

.service-card:hover .card-icon svg {
    fill: white;
}

.card-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.card-desc {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.card-features li {
    padding: 0.25rem 0.75rem;
    background: var(--gray-50);
    color: var(--gray-600);
    font-size: 0.8125rem;
    border-radius: var(--radius-full);
}

.card-price {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-100);
}

.price-from {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.price-amount {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

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

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.card-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transition: transform var(--transition-fast);
}

.card-link:hover {
    gap: 0.75rem;
}

.card-link:hover svg {
    transform: translateX(4px);
}

/* ============================================
   为什么选择我们
   ============================================ */
.why-us {
    padding: var(--section-padding);
    background: white;
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.why-card {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.why-card:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.why-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
}

.why-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.why-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ============================================
   服务流程
   ============================================ */
.process {
    padding: var(--section-padding);
    background: var(--gray-50);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: var(--gray-200);
    z-index: 0;
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    position: absolute;
    top: -10px;
    right: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-100);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-full);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--primary-100);
    transition: all var(--transition-base);
}

.process-step:hover .step-icon {
    background: var(--gradient-primary);
    border-color: var(--primary);
    transform: scale(1.1);
}

.step-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--primary);
    transition: fill var(--transition-base);
}

.process-step:hover .step-icon svg {
    fill: white;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}

.step-desc {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ============================================
   数据统计
   ============================================ */
.stats {
    padding: var(--section-padding);
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.stats-bg {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(14, 165, 233, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.15) 0%, transparent 50%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

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

.stat-card .stat-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.stat-card .stat-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--primary-light);
}

.stat-card .stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: white;
    display: block;
    line-height: 1;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-light);
}

.stat-card .stat-label {
    display: block;
    font-size: 1rem;
    color: var(--gray-400);
    margin-top: 0.5rem;
}

/* ============================================
   客户评价
   ============================================ */
.testimonials {
    padding: var(--section-padding);
    background: white;
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.testimonial-card {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-stars {
    color: #f59e0b;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.testimonial-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.author-info span {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
}

.slider-btn {
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

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

.slider-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--gray-300);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.dot.active {
    width: 24px;
    border-radius: 4px;
    background: var(--primary);
}

/* ============================================
   常见问题 (AEO优化)
   ============================================ */
.faq {
    padding: var(--section-padding);
    background: var(--gray-50);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 1rem;
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--primary-200);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(90deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer > div {
    padding: 0 1.5rem 1.5rem;
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.7;
}

.faq-answer p {
    margin-bottom: 0.75rem;
}

.faq-answer ul {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    list-style: disc;
}

.faq-answer li {
    margin-bottom: 0.25rem;
}

.faq-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.875rem;
}

.faq-table th,
.faq-table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-200);
    text-align: left;
}

.faq-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
}

.faq-more {
    text-align: center;
    margin-top: 2rem;
}

/* ============================================
   新闻资讯
   ============================================ */
.news {
    padding: var(--section-padding);
    background: white;
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
}

.news-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.news-card.featured {
    grid-column: span 2;
    grid-row: span 2;
}

.news-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.news-card.featured .news-image {
    aspect-ratio: 16/9;
}

.news-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-placeholder svg {
    width: 64px;
    height: 64px;
    fill: rgba(255, 255, 255, 0.5);
}

.news-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: white;
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    display: block;
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-bottom: 0.75rem;
}

.news-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.news-content h3 a {
    color: var(--gray-900);
    transition: color var(--transition-fast);
}

.news-content h3 a:hover {
    color: var(--primary);
}

.news-card.featured .news-content h3 {
    font-size: 1.375rem;
}

.news-content p {
    font-size: 0.9375rem;
    color: var(--gray-600);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    text-align: center;
    margin-top: 3rem;
}

/* ============================================
   CTA区域
   ============================================ */
.cta {
    padding: 5rem 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.cta-trust {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9375rem;
}

/* ============================================
   页脚
   ============================================ */
.main-footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding-top: 5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    padding-bottom: 4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: white;
    margin-bottom: 1.5rem;
}

.footer-desc {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

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

.footer-social svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.footer-links h4,
.footer-contact h4 {
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--gray-400);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9375rem;
}

.footer-contact svg {
    width: 18px;
    height: 18px;
    fill: var(--primary-light);
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    font-size: 0.8125rem;
}

.footer-info p {
    margin-bottom: 0.25rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: var(--gray-500);
}

.footer-legal a:hover {
    color: white;
}

/* ============================================
   回到顶部
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

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

.back-to-top:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-4px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    fill: var(--gray-600);
}

.back-to-top:hover svg {
    fill: white;
}

/* ============================================
   浮动咨询按钮
   ============================================ */
.floating-cta {
    position: fixed;
    bottom: 6rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 1000;
}

.floating-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    transform: translateX(100px);
    opacity: 0;
}

.floating-btn.visible {
    transform: translateX(0);
    opacity: 1;
}

.floating-btn.phone {
    background: var(--primary);
}

.floating-btn.wechat {
    background: #07c160;
}

.floating-btn:hover {
    transform: translateX(-4px);
    box-shadow: var(--shadow-xl);
    color: white;
}

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

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-us-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-timeline::before {
        display: none;
    }
    
    .testimonials-slider {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-card.featured {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-bar .container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .why-us-grid {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-card.featured {
        grid-column: span 1;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    /* Mobile Menu */
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        box-shadow: var(--shadow-2xl);
        transition: right var(--transition-base);
        z-index: 1000;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: 1rem;
        font-size: 1.0625rem;
    }
    
    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        padding-left: 1rem;
        display: none;
    }
    
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav-cta {
        display: none;
    }
    
    .top-bar-left {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .stat-item {
        padding: 0.75rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .advantages-bar .container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-trust {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .floating-cta {
        right: 1rem;
        bottom: 5rem;
    }
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

[data-aos] {
    opacity: 0;
    transition: all 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}