/* --------------------------------------------------
 * Aurora 官方网站传统规范样式表
 * -------------------------------------------------- */

/* 1. 基础全局设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "SimSun", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333333;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.25s ease;
}

ul {
    list-style: none;
}

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

/* 全局版心与容器 */
.container {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    padding: 70px 0;
}

.bg-light {
    background-color: #f7f9fc;
}

/* 标题规范 */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header .sub-title {
    font-size: 13px;
    letter-spacing: 2px;
    color: #0056b3;
    font-weight: bold;
    display: block;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.section-title {
    font-size: 30px;
    color: #1a2b4c;
    font-weight: bold;
}

.title-line {
    width: 60px;
    height: 3px;
    background-color: #0056b3;
    margin: 15px auto 0;
}

.section-desc {
    color: #666666;
    font-size: 15px;
    margin-top: 12px;
}

/* 按钮通用规范 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 15px;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    text-align: center;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #0056b3;
    color: #ffffff;
    border-color: #0056b3;
}

.btn-primary:hover {
    background-color: #004085;
    border-color: #004085;
    box-shadow: 0 4px 10px rgba(0, 86, 179, 0.25);
}

.btn-outline {
    background-color: transparent;
    color: #ffffff;
    border-color: #ffffff;
}

.btn-outline:hover {
    background-color: #ffffff;
    color: #0056b3;
}

.btn-block {
    display: block;
    width: 100%;
}



/* 3. 主导航栏 (Header Nav) */
header {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo a {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo h1 {
    font-size: 28px;
    color: #0056b3;
    font-weight: 800;
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 14px;
    color: #666666;
    font-weight: normal;
    border-left: 1px solid #cccccc;
    padding-left: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: 28px;
}

.nav-links a {
    font-size: 15px;
    color: #333333;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: #0056b3;
}

.nav-links a.active::after,
.nav-links a:hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #0056b3;
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease;
    background-color: #333333;
}

/* 4. 英雄区域 (Hero Section) */
.hero {
    position: relative;
    height: 520px;
    background: url('../images/hero_banner.jpg') no-repeat center center / cover;
    display: flex;
    align-items: center;
    color: #ffffff;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 37, 55, 0.85) 0%, rgba(0, 86, 179, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-content .badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 4px 14px;
    font-size: 13px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.hero-content h2 {
    font-size: 42px;
    line-height: 1.25;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 17px;
    line-height: 1.6;
    margin-bottom: 35px;
    color: #e0e6ed;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

.hero-btns .btn {
    min-width: 170px;
    padding: 13px 0;
    text-align: center;
}



/* 6. 关于我们 (About Us) */
.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image-container {
    position: relative;
}

.about-img {
    border-radius: 6px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
}



.about-text-content h3 {
    font-size: 22px;
    color: #1a2b4c;
    margin-bottom: 20px;
    line-height: 1.4;
}

.about-text-content p {
    color: #555555;
    margin-bottom: 15px;
    font-size: 15px;
}

.vision-mission-grid {
    margin-top: 30px;
    display: grid;
    gap: 20px;
}

.vm-item {
    display: flex;
    gap: 15px;
    background-color: #f7f9fc;
    padding: 15px 20px;
    border-radius: 6px;
    border-left: 4px solid #0056b3;
}

.vm-icon {
    font-size: 24px;
}

.vm-info h4 {
    font-size: 16px;
    color: #1a2b4c;
    margin-bottom: 4px;
}

.vm-info p {
    font-size: 13px;
    color: #666666;
    margin-bottom: 0;
}

/* 7. 核心优势 (Advantages) */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.advantage-card {
    background-color: #ffffff;
    padding: 35px 25px;
    border-radius: 6px;
    border: 1px solid #e1e8f0;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border-color: #0056b3;
}

.adv-icon-box {
    width: 70px;
    height: 70px;
    background-color: #e6f0fa;
    color: #0056b3;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.advantage-card h3 {
    font-size: 18px;
    color: #1a2b4c;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 14px;
    color: #666666;
    line-height: 1.6;
}

/* 8. 产品与服务 (Services) */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-box {
    background-color: #ffffff;
    border: 1px solid #e5e9f0;
    border-radius: 6px;
    padding: 35px 30px;
    transition: box-shadow 0.3s ease;
}

.service-box:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.service-icon {
    font-size: 36px;
    margin-bottom: 20px;
}

.service-box h3 {
    font-size: 19px;
    color: #1a2b4c;
    margin-bottom: 12px;
}

.service-box p {
    font-size: 14px;
    color: #666666;
    margin-bottom: 20px;
}

.service-features {
    border-top: 1px dashed #e1e8f0;
    padding-top: 15px;
}

.service-features li {
    font-size: 13px;
    color: #555555;
    margin-bottom: 6px;
}

/* 9. 成功案例 (Cases) */
.featured-case-banner {
    background-color: #ffffff;
    border-radius: 12px;
    border: 1px solid #e1e8f0;
    border-top: 4px solid #0056b3;
    padding: 40px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0, 50, 100, 0.05);
}

.featured-tag {
    display: inline-block;
    background-color: #e6f0fa;
    color: #0056b3;
    font-size: 13px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.featured-case-content h2 {
    font-size: 24px;
    color: #1a2b4c;
    margin-bottom: 14px;
    line-height: 1.4;
}

.featured-desc {
    font-size: 14px;
    color: #556980;
    line-height: 1.6;
    margin-bottom: 25px;
}

.featured-points {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.f-point-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: #f8fafc;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

.f-point-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.f-point-item strong {
    display: block;
    font-size: 14px;
    color: #1a2b4c;
    margin-bottom: 2px;
}

.f-point-item p {
    font-size: 13px;
    color: #64748b;
    margin: 0;
    line-height: 1.4;
}

.featured-case-image {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.featured-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.featured-case-banner:hover .featured-img {
    transform: scale(1.03);
}

.img-badge {
    position: absolute;
    bottom: 15px;
    left: 15px;
    background-color: rgba(15, 37, 55, 0.85);
    color: #ffffff;
    font-size: 12px;
    padding: 6px 14px;
    border-radius: 20px;
    backdrop-filter: blur(4px);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-card {
    background-color: #ffffff;
    border-radius: 8px;
    padding: 30px;
    border: 1px solid #e1e8f0;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.case-tag {
    display: inline-block;
    align-self: flex-start;
    background-color: #e6f0fa;
    color: #0056b3;
    font-size: 12px;
    font-weight: bold;
    padding: 3px 10px;
    border-radius: 3px;
    margin-bottom: 15px;
}

.case-card h3 {
    font-size: 18px;
    color: #1a2b4c;
    margin-bottom: 12px;
    line-height: 1.4;
}

.case-desc {
    font-size: 14px;
    color: #666666;
    margin-bottom: 20px;
}

.case-feature-list {
    margin-bottom: 20px;
    background-color: #f8fafc;
    padding: 15px 18px;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    flex-grow: 1;
}

.case-feature-list h4 {
    font-size: 13px;
    color: #1a2b4c;
    margin-bottom: 8px;
    font-weight: 700;
}

.case-feature-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.case-feature-list li {
    font-size: 13px;
    color: #475569;
    margin-bottom: 6px;
    line-height: 1.5;
}

.case-feature-list li:last-child {
    margin-bottom: 0;
}

.case-feature-list strong {
    color: #0056b3;
}

.case-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.case-highlights span {
    font-size: 12px;
    background-color: #f1f4f8;
    color: #555555;
    padding: 4px 10px;
    border-radius: 12px;
}



/* 11. 联系我们 (Contact Us) - 浅色大厂商务卡片 */
.contact-section {
    background-color: #f7f9fc;
    padding: 80px 0;
}

.contact-box-wrapper {
    background-color: #ffffff;
    border-radius: 16px;
    padding: 55px 45px;
    box-shadow: 0 15px 35px rgba(0, 40, 90, 0.06);
    border: 1px solid #e2e8f0;
    border-top: 4px solid #0056b3;
}

.contact-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 45px;
}

.contact-badge {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 2px;
    color: #0056b3;
    font-weight: 700;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.contact-header h2 {
    font-size: 32px;
    color: #1a2b4c;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-lead {
    font-size: 15px;
    color: #556980;
    line-height: 1.6;
}

.contact-cards-grid {
    display: flex;
    justify-content: center;
}

.contact-card {
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 35px 30px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    transition: all 0.3s ease;
    max-width: 560px;
    width: 100%;
}

.contact-card:hover {
    background-color: #ffffff;
    transform: translateY(-4px);
    border-color: #0056b3;
    box-shadow: 0 12px 25px rgba(0, 86, 179, 0.1);
}

.card-icon-wrapper {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background-color: #e6f0fa;
    color: #0056b3;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.contact-card:hover .card-icon-wrapper {
    background-color: #0056b3;
    color: #ffffff;
}

.card-info {
    flex-grow: 1;
}

.card-label {
    display: block;
    font-size: 12px;
    color: #0056b3;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.card-info h3 {
    font-size: 18px;
    color: #1a2b4c;
    font-weight: 600;
    margin-bottom: 6px;
    line-height: 1.4;
}

.card-info h3 a {
    color: #0056b3;
    transition: color 0.25s ease;
}

.card-info h3 a:hover {
    color: #003d82;
    text-decoration: underline;
}

.card-sub {
    font-size: 13px;
    color: #64748b;
    margin: 0;
}



/* 12. 页脚 (Footer) */
footer {
    background-color: #0f2537;
    color: #a0b2c6;
    font-size: 14px;
}

.footer-main {
    padding: 60px 0;
    display: grid;
    grid-template-columns: 2fr 1.1fr 1.3fr;
    gap: 50px;
}

.footer-nav-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 15px;
}

.footer-col h2 {
    color: #ffffff;
    font-size: 26px;
    margin-bottom: 6px;
}

.footer-col h4 {
    color: #ffffff;
    font-size: 16px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: #0056b3;
}

.footer-text {
    margin-top: 15px;
    font-size: 13px;
    line-height: 1.6;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: #a0b2c6;
}

.footer-col ul a:hover {
    color: #ffffff;
    padding-left: 5px;
}

.footer-col p {
    margin-bottom: 10px;
    font-size: 13px;
}

.footer-contact-item strong {
    color: #e0e6ed;
}

.footer-contact-item a {
    color: #a0b2c6;
}

.footer-contact-item a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-bottom {
    background-color: #0a1926;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 13px;
}

.footer-bottom-content {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background-color: #0056b3;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    font-size: 20px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: opacity 0.3s, background-color 0.3s;
    z-index: 999;
}

.back-to-top:hover {
    background-color: #004085;
}

/* 13. 移动端适配 (Responsive Design) */
@media screen and (max-width: 992px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .contact-cards-grid {
        grid-template-columns: 1fr;
    }

    .featured-case-banner {
        grid-template-columns: 1fr;
        padding: 30px 25px;
    }



    .footer-top {
        flex-direction: column;
        gap: 30px;
    }

    .footer-contact-box {
        min-width: 100%;
        width: 100%;
    }
}

@media screen and (max-width: 768px) {


    header {
        height: 70px;
    }

    .header-container {
        height: 70px;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #ffffff;
        width: 100%;
        height: calc(100vh - 70px);
        padding: 30px 0;
        transition: left 0.3s ease;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        align-items: center;
        overflow-y: auto;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links li {
        margin: 15px 0;
    }

    .nav-links a {
        font-size: 17px;
    }

    .hero {
        height: 440px;
    }

    .hero-content h2 {
        font-size: 28px;
    }

    .hero-content p {
        font-size: 15px;
    }

    .services-grid,
    .cases-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-main {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom-content {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}