/* Global Styles */
:root {
    --primary-color: #1677ff; /* 阿里蓝风格 */
    --primary-hover: #4096ff;
    --secondary-color: #faad14;
    --text-main: #1f1f1f;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-light: #f8fafc; /* 更柔和的冷灰 */
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(22, 119, 255, 0.15);
    --radius-md: 8px;
    --radius-lg: 16px;
    --container-width: 1200px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid rgba(0,0,0,0.03);
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.5px;
}

.logo svg {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 48px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.auth-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 24px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: 0.5px;
}

.btn-outline {
    border: 1px solid #d9d9d9;
    color: var(--text-main);
    background: white;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
    box-shadow: 0 2px 0 rgba(5, 145, 255, 0.1);
}

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: 100px;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hero-bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    opacity: 0.6;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: rgba(22, 119, 255, 0.08);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: rgba(250, 173, 20, 0.08);
    bottom: 0;
    left: -50px;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 80px;
    position: relative;
    z-index: 1;
}

.hero-text {
    flex: 1;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(22, 119, 255, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: 60px;
    line-height: 1.15;
    font-weight: 800;
    margin-bottom: 24px;
    color: #0f172a;
    letter-spacing: -1.5px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-buttons .btn {
    padding: 14px 36px;
    font-size: 16px;
    border-radius: 12px;
}

.hero-trust {
    display: flex;
    align-items: center;
    gap: 16px;
}

.hero-trust span {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

.hero-image {
    flex: 1;
    position: relative;
    perspective: 1000px; 
}

/* Dashboard SVG Animation */
.dashboard-svg {
    width: 120%; /* Slightly larger to pop out */
    height: auto;
    margin-right: -10%; /* Offset to balance layout */
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.1));
    transition: transform 0.5s ease;
}

.dashboard-svg:hover {
    transform: translateY(-10px) rotateY(-2deg);
}

/* Logo Wall */
.logo-wall {
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
    background: white;
}

.logo-wall p {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 24px;
    font-weight: 500;
}

.logos {
    display: flex;
    justify-content: space-around;
    align-items: center;
    opacity: 0.6;
    flex-wrap: wrap;
    gap: 30px;
}

.logo-item {
    font-size: 18px;
    font-weight: 700;
    color: #94a3b8;
    letter-spacing: 1px;
}

/* Features Section */
.section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    color: #0f172a;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: left; /* Changed to left align */
    transition: all 0.4s ease;
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(22, 119, 255, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: #f0f7ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-card:hover .feature-icon {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 700;
}

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

/* Industries Section */
.industries {
    background: var(--bg-light);
}

.industry-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.industry-card {
    background: white;
    border-radius: 24px; /* More rounded */
    overflow: hidden;
    display: flex;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    height: 440px;
    border: 1px solid rgba(0,0,0,0.03);
}

.industry-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.industry-content {
    padding: 50px;
    flex: 1.2;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.industry-label {
    text-transform: uppercase;
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.industry-content h3 {
    font-size: 28px;
    margin-bottom: 16px;
    font-weight: 800;
}

.industry-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.industry-content ul {
    margin-top: auto;
}

.industry-content li {
    margin-bottom: 12px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    font-weight: 500;
}

.industry-image-container {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.industry-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.industry-card:hover .industry-image-container img {
    transform: scale(1.08);
}

/* Process Section */
.process-section {
    background: white;
    text-align: center;
}

.process-grid {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 20px;
    margin-top: 60px;
}

.process-item {
    flex: 1;
    max-width: 300px;
    padding: 0 20px;
}

.process-number {
    font-size: 60px;
    font-weight: 900;
    color: rgba(22, 119, 255, 0.1);
    line-height: 1;
    margin-bottom: -20px;
    position: relative;
    z-index: 0;
}

.process-item h3 {
    position: relative;
    z-index: 1;
    font-size: 20px;
    margin-bottom: 16px;
    font-weight: 700;
}

.process-item p {
    color: var(--text-secondary);
    font-size: 14px;
}

.process-arrow {
    padding-top: 40px;
    color: #cbd5e1;
}

/* Stats Section */
.stats-section {
    background: #0f172a; /* Darker blue/black */
    color: white;
    padding: 100px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item h4 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-item p {
    font-size: 16px;
    color: #94a3b8;
    font-weight: 500;
}

/* Contact Section */
.contact-section {
    padding: 80px 0;
    background: #f8fafc;
    text-align: center;
}

.contact-title {
    font-size: 32px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 40px;
}

.contact-form-wrapper {
    display: flex;
    justify-content: center;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    width: 100%;
    max-width: 600px;
    text-align: left;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
    outline: none;
    transition: border-color 0.3s;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: #1677ff;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: #94a3b8;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #1677ff 0%, #4096ff 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.4);
}

/* Footer */
footer {
    background: #0f172a;
    color: white;
    padding: 80px 0 30px;
    font-size: 14px;
}

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

.footer-brand p {
    color: #94a3b8;
    margin-top: 24px;
    max-width: 300px;
    line-height: 1.8;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 24px;
    color: white;
    font-weight: 700;
}

.footer-col ul li {
    margin-bottom: 14px;
}

.footer-col ul li a {
    color: #94a3b8;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: #64748b;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-title { font-size: 48px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .industry-grid { grid-template-columns: 1fr; }
    .industry-card { height: auto; }
    .industry-image-container { display: none; }
    .process-grid { flex-direction: column; align-items: center; }
    .process-arrow { transform: rotate(90deg); padding: 20px 0; }
    .dashboard-svg { width: 100%; margin-right: 0; }
}

@media (max-width: 768px) {
    .nav-links, .auth-buttons { display: none; }
    .hero-content { flex-direction: column; text-align: center; gap: 40px; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-buttons { justify-content: center; }
    .hero-trust { justify-content: center; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .cta-box { padding: 40px 20px; }
    .cta-box h2 { font-size: 32px; }
}