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

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    line-height: 1.5;
    color: #1a1e24;
    background-color: #ffffff;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 导航 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
    border-bottom: 1px solid #eaeef2;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    font-weight: 500;
    color: #2c3e50;
}

.nav-links a {
    text-decoration: none;
    color: inherit;
}

.nav-links a:hover {
    color: #1f5f8e;
}

.btn {
    display: inline-block;
    background-color: #1f5f8e;
    color: white;
    padding: 0.7rem 1.8rem;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 1rem;
}

.btn:hover {
    background-color: #134670;
}

.btn-outline {
    background-color: transparent;
    border: 1.5px solid #1f5f8e;
    color: #1f5f8e;
}

.btn-outline:hover {
    background-color: #e5f0f9;
}

/* 英雄区 / Hero */
.hero {
    padding: 4rem 0 5rem 0;
    background: linear-gradient(to bottom, #f9fcff, #ffffff);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    color: #0a2942;
    margin-bottom: 1.2rem;
}

.hero .subhead {
    font-size: 1.25rem;
    color: #2b4b6f;
    margin-bottom: 2rem;
    max-width: 90%;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin: 2.5rem 0;
    flex-wrap: wrap;
}

.stat-item {
    font-weight: 600;
}

.stat-number {
    display: block;
    font-size: 2rem;
    color: #1f5f8e;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 400;
    color: #4a5f73;
}

.hero-image-placeholder {
    background-color: #d9e6f2;
    border-radius: 24px;
    padding: 60% 0;
    position: relative;
    background-image: url('../images/hero.png');
    background-size: cover;
    background-position: center;
    box-shadow: 0 20px 30px -10px rgba(0,30,50,0.15);
}

/* 信任标识 */
.trust-bar {
    background-color: #f2f6fa;
    padding: 1.2rem 0;
    text-align: center;
    border-top: 1px solid #dde5ed;
    border-bottom: 1px solid #dde5ed;
}

.trust-logos {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    color: #2e4a6b;
    font-weight: 500;
}

.trust-logos span {
    opacity: 0.8;
    font-size: 1.1rem;
}

/* 通用章节 */
.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: #0a2942;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: #456f9c;
    font-size: 1.2rem;
    margin-bottom: 3.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 核心优势卡片 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.advantage-card {
    background: #f9fcff;
    padding: 2rem 1.5rem;
    border-radius: 32px;
    text-align: center;
    border: 1px solid #e2ecf5;
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.advantage-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
    color: #143650;
}

.advantage-card p {
    color: #3b5670;
}

/* 技术 / 工艺 */
.techniques {
    background-color: #f2f6fa;
}

.badge-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin: 2.5rem 0;
}

.badge {
    background: white;
    border-radius: 40px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    border: 1px solid #c7d9e9;
    color: #1c3f5e;
    font-size: 1.1rem;
}

/* 产品样式 */
.style-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

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

.style-image-placeholder {
    background-color: #deeaf3;
    padding: 100% 0;
    border-radius: 30px;
    margin-bottom: 1rem;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 为什么选择我们 */
.why-choose-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.why-list {
    list-style: none;
}

.why-list li {
    padding: 0.7rem 0;
    border-bottom: 1px solid #dae6f0;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
}

.why-list li::before {
    content: "✓";
    color: #1f5f8e;
    font-weight: 700;
    font-size: 1.3rem;
}

/* 流程 */
.process-steps {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 4rem 0;
}

.step {
    flex: 1;
    min-width: 150px;
    text-align: center;
    position: relative;
}

.step-number {
    background-color: #1f5f8e;
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

/* CTA 区域 */
.cta-section {
    background-color: #0a2942;
    color: white;
    border-radius: 48px;
    padding: 4rem 3rem;
    text-align: center;
    margin: 3rem 0;
}

.cta-section h2 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-light {
    background-color: white;
    color: #0a2942;
}

.btn-light:hover {
    background-color: #e0e9f2;
}

/* 页脚 */
.footer {
    border-top: 1px solid #dae2ec;
    padding: 3rem 0;
    margin-top: 3rem;
    color: #2d4b6b;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 2.5rem;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 600;
    color: #1f3a5f;
    margin-bottom: 1rem;
}

/* 响应式 */
@media (max-width: 900px) {
    .hero-grid, .why-choose-grid, .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .style-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero-image-placeholder {
        padding: 50% 0;
    }
}

@media (max-width: 600px) {
    .style-grid {
        grid-template-columns: 1fr;
    }
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1.2rem;
    }
}