/* 
 * 全局样式 - wmseotg.com
 * 专业外贸网站推广与谷歌SEO优化服务
 */

/* 重置与基础样式 */
:root {
    --primary-color: #1a5fb4;
    --secondary-color: #e01e5a;
    --accent-color: #2eb67d;
    --dark-color: #333333;
    --light-color: #f8f9fa;
    --grey-color: #6c757d;
    --light-blue: #e8f4fc;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #ffffff;
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
    position: relative;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-header p {
    color: var(--grey-color);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}

.btn-primary:hover {
    background-color: #164c91;
    color: #fff;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* 导航栏 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 15px 0;
    transition: var(--transition);
}

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

.logo a {
    display: flex;
    align-items: center;
}

.logo-svg {
    width: 180px;
    height: 50px;
}

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

.nav-menu {
    display: flex;
    gap: 25px;
}

.nav-menu li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

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

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

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

.btn-contact {
    background-color: var(--primary-color);
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: 30px;
}

.btn-contact:hover {
    background-color: #164c91;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 30px;
    position: relative;
    z-index: 101;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--dark-color);
    margin: 6px 0;
    transition: var(--transition);
}

/* 首屏横幅 */
.hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f4fc 100%);
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--grey-color);
    margin-bottom: 2rem;
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-svg {
    width: 100%;
    max-width: 500px;
}

/* 服务项目 */
.services {
    padding: 100px 0;
    background-color: #fff;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--grey-color);
}

/* 我们的优势 */
.advantage {
    padding: 100px 0;
    background-color: var(--light-blue);
}

.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 50px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-color);
    opacity: 0.2;
    line-height: 1;
}

.advantage-content h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.advantage-content p {
    color: var(--grey-color);
}

/* 成功案例 */
.cases {
    padding: 100px 0;
    background-color: #fff;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.case-card {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.case-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
}

.case-card h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.case-card p {
    color: var(--grey-color);
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background-color: var(--light-blue);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 50px;
    margin-top: 50px;
}

.about-text p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--dark-color);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--grey-color);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: #fff;
}

.contact-wrapper {
    display: flex;
    gap: 40px;
    margin-top: 50px;
}

.contact-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background-color: var(--light-color);
    border-radius: 10px;
    transition: var(--transition);
}

.contact-method:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transform: translateY(-5px);
}

.contact-icon {
    width: 50px;
    height: 50px;
}

.contact-text h3 {
    margin-bottom: 5px;
    font-size: 1.25rem;
}

.contact-text p {
    color: var(--grey-color);
}

.contact-form {
    flex: 2;
    background-color: var(--light-color);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.1);
}

/* 页脚 */
footer {
    background-color: #212529;
    color: #fff;
    padding: 80px 0 20px;
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo {
    flex: 2;
}

.logo-footer {
    width: 180px;
    height: 50px;
    margin-bottom: 15px;
}

.footer-logo p {
    color: #aaa;
    margin-bottom: 20px;
}

.footer-links {
    flex: 3;
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-link-group {
    flex: 1;
}

.footer-link-group h4 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-link-group h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

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

.footer-link-group ul li a {
    color: #aaa;
    transition: var(--transition);
}

.footer-link-group ul li a:hover {
    color: #fff;
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: #aaa;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 2.8rem;
    }

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

@media (max-width: 768px) {
    .hero .container {
        flex-direction: column-reverse;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-btns {
        justify-content: center;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: #fff;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
        z-index: 100;
        padding: 40px 0;
    }

    .nav-menu.active {
        right: 0;
    }

    .advantage-item {
        flex-direction: column;
        gap: 15px;
    }

    .contact-wrapper {
        flex-direction: column;
    }

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

@media (max-width: 576px) {
    .section-header h2 {
        font-size: 2rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}