/* ========== 基础样式重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0F4C81;
    --secondary-color: #20B2AA;
    --accent-color: #FFD700;
    --text-dark: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    --bg-light: #F4F6F9;
    --bg-white: #FFFFFF;
    --border-color: #E5E7EB;
    --shadow: 0 4px 20px rgba(15, 76, 129, 0.1);
    --shadow-hover: 0 8px 30px rgba(15, 76, 129, 0.15);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
}

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

ul, li {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 100px 0;
}

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

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-title p {
    font-size: 16px;
    color: var(--text-light);
    margin-top: 20px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #0a355c);
    color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(15, 76, 129, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(15, 76, 129, 0.4);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-accent {
    background: linear-gradient(135deg, var(--accent-color), #ffc107);
    color: var(--text-dark);
    font-weight: 600;
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.4);
}

/* ========== 顶部导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

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

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

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 24px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text span {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

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

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

.header-phone {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary-color), #0a355c);
    border-radius: 50px;
    color: var(--bg-white);
    font-weight: 500;
}

.header-phone:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(15, 76, 129, 0.3);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Hero首屏区域 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e8f4f8 100%);
    padding-top: 120px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('https://images.unsplash.com/photo-1454165804606-c3d57bc86b40?w=1200&q=80') center/cover;
    clip-path: polygon(15% 0, 100% 0, 100% 100%, 0% 100%);
    opacity: 0.9;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.7) 50%, rgba(255, 255, 255, 0) 100%);
    clip-path: polygon(15% 0, 100% 0, 100% 100%, 0% 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(15, 76, 129, 0.1);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-badge i {
    color: var(--secondary-color);
}

.hero h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
    margin-bottom: 24px;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

.hero-stats {
    display: flex;
    gap: 50px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(15, 76, 129, 0.1);
    justify-content: center;
}

.hero-stat {
    text-align: left;
}

.hero-stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.hero-stat-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ========== 服务优势模块 ========== */
.advantages {
    background: var(--bg-white);
}

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

.advantage-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary-color);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, rgba(15, 76, 129, 0.1), rgba(32, 178, 170, 0.1));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--primary-color);
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-white);
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========== 服务内容模块 ========== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.service-image i {
    font-size: 64px;
    color: rgba(255, 255, 255, 0.9);
    transition: var(--transition);
}

.service-card:hover .service-image i {
    transform: scale(1.1);
}

.service-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: var(--transition);
}

.service-card:hover .service-image::before {
    transform: translateX(100%);
}

.service-content {
    padding: 30px;
}

.service-content h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.service-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.service-feature {
    padding: 6px 12px;
    background: rgba(15, 76, 129, 0.08);
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary-color);
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-color);
    font-weight: 500;
    font-size: 14px;
}

.service-link:hover {
    gap: 12px;
}

/* ========== 服务流程模块 ========== */
.process {
    background: var(--bg-white);
    position: relative;
}

.process::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%230F4C81" opacity="0.03"/></svg>') repeat;
    pointer-events: none;
}

.process-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--primary-color));
    opacity: 0.3;
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    padding: 0 20px;
}

.step-number {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    background: var(--bg-white);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    position: relative;
    z-index: 2;
    transition: var(--transition);
}

.process-step:hover .step-number {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-white);
    border-color: transparent;
    box-shadow: 0 10px 30px rgba(15, 76, 129, 0.3);
}

.step-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 28px;
    opacity: 0;
    transition: var(--transition);
}

.process-step:hover .step-number .step-icon {
    opacity: 1;
}

.process-step h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========== 关于我们模块 ========== */
.about {
    background: var(--bg-light);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image-main {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.about-image-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-image-overlay {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 200px;
    height: 200px;
    background: var(--bg-white);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.about-image-overlay span {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
}

.about-image-overlay small {
    font-size: 14px;
    color: var(--text-light);
}

.about-content h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-content h2 span {
    color: var(--primary-color);
}

.about-content p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
}

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

.about-feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, rgba(15, 76, 129, 0.1), rgba(32, 178, 170, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 20px;
}

.about-feature-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
}

/* ========== 产品案例模块 ========== */
.cases {
    background: var(--bg-white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.case-header {
    padding: 24px 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-white);
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 10px;
}

.case-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.case-body {
    padding: 30px;
}

.case-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.case-item:last-child {
    border-bottom: none;
}

.case-item-label {
    font-size: 14px;
    color: var(--text-light);
}

.case-item-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

.case-result {
    margin-top: 20px;
    padding: 16px;
    background: rgba(32, 178, 170, 0.1);
    border-radius: 12px;
    text-align: center;
}

.case-result-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
}

.case-result-label {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ========== 新闻资讯模块 ========== */
.news {
    background: var(--bg-light);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.news-image {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.news-image i {
    font-size: 48px;
    color: rgba(255, 255, 255, 0.8);
}

.news-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: var(--accent-color);
    color: var(--text-dark);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
}

.news-content {
    padding: 24px;
}

.news-date {
    font-size: 13px;
    color: var(--text-lighter);
    margin-bottom: 10px;
}

.news-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.5;
    transition: var(--transition);
}

.news-card:hover .news-content h3 {
    color: var(--primary-color);
}

.news-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    color: var(--secondary-color);
    font-size: 14px;
    font-weight: 500;
}

.news-link:hover {
    gap: 12px;
}

/* ========== 常见问题模块 ========== */
.faq {
    background: var(--bg-white);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 16px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 24px 30px;
    background: var(--bg-white);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(15, 76, 129, 0.02);
}

.faq-question.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-white);
}

.faq-icon {
    font-size: 18px;
    transition: var(--transition);
}

.faq-question.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--bg-light);
}

.faq-answer-content {
    padding: 24px 30px;
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ========== 客户评价模块 ========== */
.testimonials {
    background: linear-gradient(135deg, var(--primary-color), #0a355c);
    color: var(--bg-white);
    position: relative;
    overflow: hidden;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="%23ffffff" opacity="0.05"/><circle cx="80" cy="80" r="1" fill="%23ffffff" opacity="0.05"/></svg>') repeat;
}

.testimonials .section-title h2 {
    color: var(--bg-white);
}

.testimonials .section-title p {
    color: rgba(255, 255, 255, 0.8);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    position: relative;
    z-index: 2;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.testimonial-stars {
    color: var(--accent-color);
    font-size: 18px;
    margin-bottom: 20px;
}

.testimonial-content {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 24px;
    color: rgba(255, 255, 255, 0.9);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.testimonial-avatar {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    color: var(--bg-white);
}

.testimonial-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.testimonial-location {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========== 联系我们模块 ========== */
.contact {
    background: var(--bg-light);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    padding: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    color: var(--bg-white);
}

.contact-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
}

.contact-info p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 30px;
    opacity: 0.9;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    opacity: 0.8;
}

.contact-text p {
    font-size: 16px;
    font-weight: 500;
    margin: 0;
}

.contact-form {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
}

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

.form-submit {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
}

/* ========== 底部Footer ========== */
.footer {
    background: #0a1f33;
    color: var(--bg-white);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.links-grid{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
}

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

.footer-about .logo-text {
    color: var(--bg-white);
}

.footer-about p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 18px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-links h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--bg-white);
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    gap: 30px;
}

.footer-bottom-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links a:hover {
    color: var(--secondary-color);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 768px) {
    .section-padding {
        padding: 60px 0;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero::before,
    .hero::after {
        display: none;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 30px;
        margin-top: 30px;
        padding: 20px 0;
    }

    .process-timeline {
        flex-direction: column;
        gap: 40px;
    }

    .process-timeline::before {
        display: none;
    }

    .about-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image-main {
        height: 350px;
    }

    .about-image-overlay{
        bottom: -10px;
        right: -10px;
        width: 100px;
        height: 100px;
    }
    .about-image-overlay span{
        font-size: 36px;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .footer-bottom-links{
        gap: 10px;
    }
    
}

@media (max-width: 480px) {
    .advantages-grid,
    .services-grid,
    .cases-grid,
    .news-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 {
    animation-delay: 0.1s;
}

.animate-delay-2 {
    animation-delay: 0.2s;
}

.animate-delay-3 {
    animation-delay: 0.3s;
}

.animate-delay-4 {
    animation-delay: 0.4s;
}