/* ============================================
   爱极搜AI官网 - 主样式文件
   ============================================ */

:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #818cf8;
    --primary-bg: #eef2ff;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
    --gradient-text: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

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

.text-highlight {
    color: var(--accent);
    font-weight: 700;
}

/* ============================================
   按钮系统
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.95rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 1.05rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.5);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

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

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

.btn-consult {
    display: inline-flex;
    align-items: center;
    padding: 8px 24px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-consult:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

/* ============================================
   导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 16px 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    padding: 10px 0;
}

.header.scrolled .nav-link {
    color: var(--gray-700);
}

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

.header.scrolled .logo-icon {
    background: var(--gradient-primary);
    color: var(--white);
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: var(--gradient-primary);
    color: var(--white);
    font-weight: 900;
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: var(--transition);
}

.logo-text {
    font-size: 1.3rem;
    color: var(--white);
    transition: var(--transition);
}

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

.nav-link {
    padding: 8px 16px;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
    background: var(--primary-bg);
}

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

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

/* ============================================
   Hero 横幅
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    z-index: -2;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(79, 70, 229, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(6, 182, 212, 0.2) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: -1;
}

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

.hero-content {
    max-width: 720px;
    margin-bottom: 60px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 900;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--secondary);
    font-weight: 500;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-buttons .btn-outline {
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.4);
}

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

.hero-stats {
    display: grid;
    /* minmax(0,1fr) 避免数字变长时 min-content 撑开列导致整区重排、上方文案闪动 */
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    contain: layout;
}

.stat-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 8px;
}

.hero-stats .stat-number[data-target] {
    display: inline-block;
    font-variant-numeric: tabular-nums;
    min-width: 11ch;
    vertical-align: top;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 500;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    z-index: 2;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: auto;
}

/* ============================================
   AI平台滚动
   ============================================ */
.platforms {
    padding: 40px 0;
    background: var(--white);
    overflow: hidden;
}

.platform-scroll {
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.platform-track {
    display: flex;
    gap: 40px;
    animation: scrollPlatform 25s linear infinite;
    width: max-content;
}

.platform-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--gray-50);
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--gray-600);
    white-space: nowrap;
    flex-shrink: 0;
    transition: var(--transition);
}

.platform-item:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.platform-item i {
    font-size: 1.1rem;
    color: var(--primary-light);
}

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

/* ============================================
   通用板块样式
   ============================================ */
.section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 4px 16px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   零风险服务
   ============================================ */
.risk-free {
    background: var(--gray-50);
}

.risk-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.risk-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.risk-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.risk-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--primary-bg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary);
    transition: var(--transition);
}

.risk-card:hover .risk-icon {
    background: var(--gradient-primary);
    color: var(--white);
}

.risk-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.risk-card p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ============================================
   价格体系
   ============================================ */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.pricing-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: 0 8px 30px rgba(79, 70, 229, 0.15);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 20px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--primary-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
}

.pricing-card.featured .pricing-icon {
    background: var(--gradient-primary);
    color: var(--white);
}

.pricing-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.pricing-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 20px;
    line-height: 1.6;
}

.pricing-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
}

.pricing-cta {
    text-align: center;
    margin-top: 48px;
}

/* ============================================
   三大优势
   ============================================ */
.advantages {
    background: var(--gray-50);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 48px 32px 40px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    overflow: hidden;
}

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

.advantage-number {
    position: absolute;
    top: 16px;
    right: 24px;
    font-size: 4rem;
    font-weight: 900;
    color: var(--gray-100);
    line-height: 1;
    transition: var(--transition);
}

.advantage-card:hover .advantage-number {
    color: var(--primary-bg);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--white);
    margin-bottom: 24px;
}

.advantage-card h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
}

.advantage-card p {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.8;
}

.advantage-card p strong {
    color: var(--primary-dark);
}

/* ============================================
   客户信赖
   ============================================ */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.trust-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.trust-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.trust-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.trust-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.trust-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.trust-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--gray-100);
    color: var(--gray-500);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   排名案例
   ============================================ */
.cases {
    background: var(--gray-50);
}

.cases-wrapper {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cases-table-group {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.cases-table-group:hover {
    box-shadow: var(--shadow-md);
}

.cases-table {
    width: 100%;
    border-collapse: collapse;
}

.cases-table thead {
    background: var(--gradient-primary);
}

.cases-table th {
    padding: 14px 16px;
    color: var(--white);
    font-weight: 600;
    font-size: 0.85rem;
    text-align: left;
}

.cases-table th:last-child {
    text-align: center;
}

.cases-table td {
    padding: 12px 16px;
    font-size: 0.9rem;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
}

.cases-table td:last-child {
    text-align: center;
}

.cases-table tbody tr:last-child td {
    border-bottom: none;
}

.cases-table tbody tr:hover {
    background: var(--gray-50);
}

.rank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.85rem;
}

.rank-1 {
    background: linear-gradient(135deg, #f59e0b, #f97316);
    color: var(--white);
}

.rank-2 {
    background: linear-gradient(135deg, #6366f1, #818cf8);
    color: var(--white);
}

/* ============================================
   CTA横幅
   ============================================ */
.cta-banner {
    background: var(--gradient-primary);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    inset: 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;
    text-align: center;
}

.cta-content h2 {
    font-size: 2rem;
    color: var(--white);
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-phone {
    margin-bottom: 28px;
}

.cta-phone a {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--white);
    letter-spacing: 2px;
}

.cta-phone i {
    margin-right: 12px;
    font-size: 1.8rem;
    animation: phoneRing 2s infinite;
}

@keyframes phoneRing {
    0%, 100% { transform: rotate(0deg); }
    10% { transform: rotate(15deg); }
    20% { transform: rotate(-10deg); }
    30% { transform: rotate(15deg); }
    40% { transform: rotate(-5deg); }
    50% { transform: rotate(0deg); }
}

/* ============================================
   新闻中心
   ============================================ */
.news-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 36px;
}

.news-tab {
    padding: 10px 28px;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
}

.news-tab:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.news-tab.active {
    background: var(--gradient-primary);
    color: var(--white);
}

.news-list {
    display: none;
}

.news-list.active {
    display: block;
}

.news-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    background: var(--white);
    border-radius: var(--radius);
    margin-bottom: 10px;
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}

.news-item:hover {
    background: var(--primary-bg);
    border-color: var(--primary-light);
    transform: translateX(8px);
}

.news-title {
    font-size: 0.95rem;
    color: var(--gray-700);
    font-weight: 400;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 20px;
}

.news-item:hover .news-title {
    color: var(--primary);
}

.news-date {
    font-size: 0.85rem;
    color: var(--gray-400);
    white-space: nowrap;
}

.news-more {
    text-align: center;
    margin-top: 36px;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--dark);
    padding: 80px 0 0;
    color: rgba(255, 255, 255, 0.7);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-icon {
    background: var(--gradient-primary);
}

.footer-about {
    font-size: 0.9rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    padding: 6px 0;
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-contact p {
    font-size: 0.9rem;
    padding: 6px 0;
    color: rgba(255, 255, 255, 0.5);
}

.footer-contact i {
    width: 20px;
    margin-right: 8px;
    color: var(--primary-light);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-friend-links {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.3);
    margin-bottom: 12px;
}

.footer-friend-links a {
    color: rgba(255, 255, 255, 0.4);
    margin: 0 8px;
}

.footer-friend-links a:hover {
    color: var(--primary-light);
}

.footer-copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.3);
}

.footer-copyright a {
    color: rgba(255, 255, 255, 0.4);
}

.footer-copyright a:hover {
    color: var(--primary-light);
}

/* ============================================
   右侧悬浮工具
   ============================================ */
.side-tools {
    position: fixed;
    right: 20px;
    bottom: 20%;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.side-tool {
    position: relative;
    width: 52px;
    height: 52px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    color: var(--gray-600);
    font-size: 0.7rem;
    transition: var(--transition);
}

.side-tool i {
    font-size: 1.1rem;
    margin-bottom: 2px;
}

.side-tool:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateX(-4px);
}

.side-tool .wechat-popup {
    display: none;
    position: absolute;
    right: 64px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    white-space: nowrap;
    color: var(--gray-700);
    font-size: 0.85rem;
}

.side-tool:hover .wechat-popup {
    display: block;
}

.wechat-popup::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-left-color: var(--white);
}

.back-top {
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}

.back-top.visible {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

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

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

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.4rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

    .cases-wrapper {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 8px;
        z-index: 999;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu .nav-link {
        color: var(--gray-700);
        font-size: 1.2rem;
        padding: 12px 32px;
    }

    .mobile-toggle {
        display: flex;
        z-index: 1001;
    }

    .btn-consult {
        display: none;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-desc {
        font-size: 0.95rem;
    }

    .hero-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .stat-card {
        padding: 20px 16px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .risk-grid,
    .advantages-grid,
    .trust-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

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

    .cta-phone a {
        font-size: 1.6rem;
    }

    .cta-content h2 {
        font-size: 1.4rem;
    }

    .news-tabs {
        flex-wrap: wrap;
    }

    .news-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .news-title {
        white-space: normal;
        margin-right: 0;
    }

    .side-tools {
        right: 12px;
    }

    .side-tool {
        width: 44px;
        height: 44px;
    }

    .side-tool span {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.6rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

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

/* ============================================
   子页面 - 页面横幅
   ============================================ */
.page-banner {
    background: var(--gradient-hero);
    padding: 140px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(79, 70, 229, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(6, 182, 212, 0.2) 0%, transparent 50%);
}

.page-banner .container {
    position: relative;
    z-index: 1;
}

.page-banner h1 {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--white);
    margin-bottom: 12px;
}

.page-banner p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.breadcrumb {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

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

.breadcrumb span {
    margin: 0 8px;
}

/* ============================================
   关于我们 - 公司简介
   ============================================ */
.about-intro {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--gray-600);
    margin-bottom: 16px;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.highlight-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--primary-bg);
    border-radius: var(--radius-lg);
}

.highlight-num {
    display: block;
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.highlight-label {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ============================================
   关于我们 - 企业文化
   ============================================ */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.culture-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.culture-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.culture-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.culture-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.culture-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ============================================
   关于我们 - 六大体系
   ============================================ */
.system-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.system-item {
    padding: 32px 24px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.system-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.system-num {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--gray-100);
    margin-bottom: 12px;
    transition: var(--transition);
}

.system-item:hover .system-num {
    color: var(--primary-bg);
}

.system-item h3, .system-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.system-item p {
    font-size: 0.9rem;
    color: var(--gray-500);
}

/* ============================================
   GEO介绍 - 内容样式
   ============================================ */
.geo-intro-content {
    max-width: 800px;
    margin: 0 auto;
}

.geo-text-block p {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--gray-600);
    margin-bottom: 16px;
}

.geo-text-block strong {
    color: var(--primary-dark);
}

/* ============================================
   GEO介绍 - 对比表格
   ============================================ */
.compare-table-wrapper {
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.compare-table thead {
    background: var(--dark);
}

.compare-table th {
    padding: 18px 20px;
    color: var(--white);
    font-weight: 600;
    font-size: 0.95rem;
    text-align: left;
}

.compare-table .highlight-col {
    background: var(--primary);
}

.compare-table td {
    padding: 16px 20px;
    font-size: 0.95rem;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
    background: var(--white);
}

.compare-table td:last-child {
    color: var(--primary-dark);
    font-weight: 500;
}

.compare-table tbody tr:hover td {
    background: var(--gray-50);
}

/* ============================================
   GEO介绍 - 服务流程
   ============================================ */
.flow-grid {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.flow-step {
    flex: 1;
    min-width: 140px;
    max-width: 180px;
    text-align: center;
    padding: 24px 16px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.flow-step:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.flow-num {
    font-size: 1.8rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.flow-step h3, .flow-step h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.flow-step p {
    font-size: 0.8rem;
    color: var(--gray-500);
    line-height: 1.5;
}

.flow-arrow {
    display: flex;
    align-items: center;
    color: var(--gray-300);
    font-size: 1.2rem;
    padding-top: 40px;
}

/* ============================================
   GEO介绍 - 平台卡片
   ============================================ */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.platform-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.platform-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.platform-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.platform-card h3, .platform-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.platform-card p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ============================================
   新闻页 - 新闻卡片
   ============================================ */
.news-card-item {
    display: flex;
    gap: 24px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.news-card-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.news-card-date {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--primary-bg);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.news-card-item:hover .news-card-date {
    background: var(--gradient-primary);
}

.news-card-date .day {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}

.news-card-item:hover .news-card-date .day {
    color: var(--white);
}

.news-card-date .month {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 4px;
}

.news-card-item:hover .news-card-date .month {
    color: rgba(255, 255, 255, 0.8);
}

.news-card-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
    line-height: 1.5;
}

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

.news-card-content p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   联系我们 - 联系卡片
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.contact-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.contact-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--white);
}

.contact-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.contact-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.contact-desc {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ============================================
   联系我们 - 表单
   ============================================ */
.form-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    box-shadow: var(--shadow);
}

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

.form-group {
    margin-bottom: 0;
}

.form-group.full-width {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.required {
    color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--gray-700);
    transition: var(--transition);
    background: var(--white);
}

.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);
}

.form-group textarea {
    resize: vertical;
}

.form-submit {
    text-align: center;
    margin-top: 8px;
}

/* ============================================
   子页面响应式补充
   ============================================ */
@media (max-width: 1024px) {
    .culture-grid,
    .contact-grid,
    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 768px) {
    .page-banner {
        padding: 120px 0 40px;
    }

    .page-banner h1 {
        font-size: 2rem;
    }

    .culture-grid,
    .contact-grid,
    .platform-grid,
    .system-grid {
        grid-template-columns: 1fr;
    }

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

    .flow-grid {
        flex-direction: column;
        align-items: center;
    }

    .flow-step {
        max-width: 100%;
        width: 100%;
    }

    .flow-arrow {
        padding-top: 0;
        transform: rotate(90deg);
    }

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

    .contact-form {
        padding: 32px 24px;
    }

    .news-card-item {
        flex-direction: column;
        gap: 16px;
    }

    .news-card-date {
        width: 100%;
        height: auto;
        padding: 12px;
        flex-direction: row;
        gap: 8px;
    }
}