/* 千呼百应 - 新设计样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    --accent: #a78bfa;
    --dark: #0f172a;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "微软雅黑", sans-serif;
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== 通用类 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 基础排版 ========== */
.text-5xl { font-size: 3rem; line-height: 1; }
.text-6xl { font-size: 3.75rem; line-height: 1; }
.text-7xl { font-size: 4.5rem; line-height: 1; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.font-bold { font-weight: 700; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.leading-tight { line-height: 1.25; }

@media (min-width: 768px) {
    .md\:text-7xl { font-size: 4.5rem; }
    .md\:text-2xl { font-size: 1.5rem; }
}

/* ========== Section ========== */

.section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(99,102,241,0.1);
    border-radius: 100px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--gray-800);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 18px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: white;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    flex-shrink: 0;
}

.nav {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    margin-left: auto !important;
    margin-right: 16px !important;
}

.header-contact {
    flex-shrink: 0;
}

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

.logo-img {
    width: 180px !important;
    height: auto !important;
    max-width: none !important;
    max-height: none !important;
}

.logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--gray-800);
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto !important;
    margin-right: 16px !important;
}

.nav-link {
    padding: 10px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(99,102,241,0.1);
}

.header-contact {
    margin-left: 0;
}

.contact-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 12px 24px;
    border-radius: 100px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99,102,241,0.3);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99,102,241,0.4);
}

/* ========== Hero 区域 ========== */
.hero {
    min-height: 600px;
    position: relative;
    background: linear-gradient(135deg, rgba(99,102,241,0.95) 0%, rgba(79,70,229,0.95) 100%);
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.btn-primary-white {
    background: white;
    color: #6366f1;
    padding: 16px 36px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 40px rgba(99,102,241,0.3);
    transition: all 0.3s ease;
}

.btn-primary-white:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(99,102,241,0.4);
}

.btn-secondary-white {
    background: transparent;
    color: white;
    padding: 16px 36px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    border: 2px solid rgba(255,255,255,0.6);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.btn-secondary-white:hover {
    background: white;
    color: #6366f1;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 320px;
    height: 320px;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    filter: blur(60px);
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -150px;
    width: 380px;
    height: 380px;
    background: rgba(139,92,246,0.2);
    border-radius: 50%;
    filter: blur(60px);
    animation: float 6s ease-in-out infinite 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    border-radius: 100px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(255,255,255,0.3);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    color: white;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero p {
    font-size: 20px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    max-width: 600px;
}

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    background: white;
    color: var(--primary);
    padding: 16px 36px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 40px rgba(99,102,241,0.3);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(99,102,241,0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    padding: 16px 36px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    border: 2px solid rgba(255,255,255,0.6);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

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

/* ========== 核心优势 ========== */
.features {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(139,92,246,0.08) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-100);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(99,102,241,0.2);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 8px 20px rgba(99,102,241,0.3);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.feature-desc {
    color: var(--gray-500);
    line-height: 1.6;
}

/* ========== 产品展示 ========== */
.products {
    padding: 100px 0;
    background: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-100);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 80px rgba(99,102,241,0.2);
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
}

.product-info {
    padding: 24px;
}

.product-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.product-desc {
    color: var(--gray-500);
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.product-link:hover {
    gap: 10px;
}

/* ========== 页面头部 ========== */
.page-header {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    text-align: center;
    color: white;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== 关于我们 ========== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--gray-800);
}

.about-text .lead {
    font-size: 18px;
    color: var(--gray-600);
    margin-bottom: 24px;
    font-weight: 600;
}

.about-text p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 16px;
}

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

.stat-card {
    background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.08));
    padding: 32px;
    border-radius: 16px;
    text-align: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
}

/* ========== 解决方案 ========== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.solution-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid var(--gray-100);
    transition: all 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(99,102,241,0.15);
}

.solution-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 20px;
}

.solution-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.solution-desc {
    color: var(--gray-600);
    margin-bottom: 20px;
    line-height: 1.6;
}

.solution-features {
    list-style: none;
    padding: 0;
}

.solution-features li {
    color: var(--gray-600);
    padding: 8px 0;
    font-size: 14px;
}

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

/* ========== 客户案例 ========== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.case-card {
    background: white;
    padding: 32px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid var(--gray-100);
    transition: all 0.3s ease;
    text-align: center;
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(99,102,241,0.15);
}

.case-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

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

.case-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.case-desc {
    color: var(--gray-600);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.case-results {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-100);
}

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

.result-number {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.result-label {
    font-size: 12px;
    color: var(--gray-500);
}

@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }
}

/* ========== CTA 区域 ========== */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.cta h2 {
    font-size: 42px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
}

.cta p {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
}

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

.cta-btn {
    background: white;
    color: var(--primary);
    padding: 16px 40px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.cta-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.cta-btn-outline {
    background: transparent;
    color: white;
    padding: 16px 40px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    border: 2px solid rgba(255,255,255,0.6);
    transition: all 0.3s ease;
}

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

/* ========== 页脚 ========== */
.footer {
    background: var(--dark);
    padding: 60px 0 30px;
    color: rgba(255,255,255,0.7);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.footer-brand .logo-text {
    color: white;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    max-width: 320px;
}

.footer-section h4 {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px 0;
    font-size: 14px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .nav { display: none; }
    
    .header-content { padding: 0 16px; }
    
    .hero h1 { font-size: 36px; }
    
    .hero p { font-size: 16px; }
    
    .section-title { font-size: 32px; }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}