/* 简化的基础样式和变量 */
:root {
    --primary: #e74c3c;
    --primary-dark: #c0392b;
    --text: #333333;
    --light-text: #ffffff;
    --background: #ffffff;
    --section-alt: #f8f9fa;
}

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

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

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
}

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.8rem;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 2.2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

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

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

/* Section styling */
section {
    padding: 5rem 0;
}

section:nth-child(even) {
    background-color: var(--section-alt);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

/* Header and navigation */
header {
    background: var(--background);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--primary);
}

.logo-svg {
    margin-right: 10px;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav ul li {
    margin-left: 2rem;
}

.main-nav ul li a {
    color: var(--text);
    font-weight: 600;
    position: relative;
}

.main-nav ul li a:hover {
    color: var(--primary);
}

.main-nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.main-nav ul li a:hover::after {
    width: 100%;
}

.toggle-nav {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.toggle-nav span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background: var(--primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero section */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--light-text);
    overflow: hidden;
    position: relative;
}

.hero .container {
    display: flex;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 60%);
}

.hero-content {
    flex: 1;
    padding-right: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--light-text);
}

.hero-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-graphics {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background-color: var(--light-text);
    color: var(--primary);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

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

.hero .btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--light-text);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.4);
}

.cta-group {
    margin-top: 2rem;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* Features section */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    margin-bottom: 1.5rem;
}

/* Divider section */
.divider {
    padding: 3rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--light-text);
    text-align: center;
}

.divider-text {
    font-size: 2rem;
    margin: 0;
}

/* Process section */
.process-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
}

.step {
    flex: 1;
    min-width: 280px;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: relative;
    transition: var(--transition);
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 20px;
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: var(--light-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

/* Benefits section */
.benefits-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit-item {
    padding: 1.5rem;
    border-left: 4px solid var(--primary);
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

/* Action section */
.action {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--light-text);
    text-align: center;
}

.action h2 {
    margin-bottom: 1rem;
}

.action p {
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.action .btn-primary {
    margin-top: 1rem;
}

/* Footer */
footer {
    background-color: #222;
    color: #ccc;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    margin-bottom: 1rem;
}

footer h4 {
    color: var(--light-text);
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
}

footer ul {
    list-style: none;
}

footer ul li {
    margin-bottom: 0.75rem;
}

footer a {
    color: #aaa;
}

footer a:hover {
    color: var(--light-text);
}

.copyright {
    border-top: 1px solid #444;
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    color: #888;
}

/* Responsive design */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 2rem;
        text-align: center;
    }
    
    .feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .toggle-nav {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        height: 100vh;
        background-color: var(--background);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: 0.3s;
        z-index: 999;
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        padding: 2rem;
    }
    
    .main-nav ul li {
        margin: 1rem 0;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .step {
        width: 100%;
    }
}

@media (max-width: 576px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .feature-card, .step, .benefit-item {
        padding: 1.5rem;
    }
}