/* 信可供应链官网样式 */
:root {
    --primary-color: #1a365d;
    --secondary-color: #2c5282;
    --accent-color: #e53e3e;
    --accent-hover: #c53030;
    --text-dark: #1a202c;
    --text-gray: #4a5568;
    --text-light: #718096;
    --white: #ffffff;
    --bg-light: #f7fafc;
    --bg-gray: #edf2f7;
    --border-color: #e2e8f0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --font-heading: 'Oswald', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(229, 62, 62, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Section 通用样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 3px;
    color: var(--accent-color);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-gray);
    max-width: 600px;
    margin: 20px auto 0;
}

/* ============ 头部导航 ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

/* 锚点定位 - 补偿固定头部高度 */
section[id] {
    scroll-margin-top: var(--scroll-offset, 130px);
}

.header.scrolled {
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.12);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.logo img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.header-contact {
    display: flex;
    align-items: center;
    gap: 30px;
}

.header-contact a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-gray);
}

.header-contact a:hover {
    color: var(--accent-color);
}

.header-contact i {
    color: var(--accent-color);
}

.lang-select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    background: var(--white);
    cursor: pointer;
    outline: none;
}

.lang-select:hover {
    border-color: var(--accent-color);
}

/* 导航菜单 */
.nav {
    padding: 0;
}

.nav-list {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.nav-list > li > a {
    display: block;
    padding: 18px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
}

.nav-list > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--accent-color);
    transition: var(--transition);
}

.nav-list > li > a:hover::after,
.nav-list > li > a.active::after {
    width: 100%;
}

.nav-list > li > a:hover,
.nav-list > li > a.active {
    color: var(--accent-color);
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 200px;
    background: var(--white);
    box-shadow: var(--shadow);
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 10px 0;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    top: calc(100% + 5px);
}

.dropdown-menu li a {
    display: block;
    padding: 12px 24px;
    font-size: 14px;
    color: var(--text-dark);
}

.dropdown-menu li a:hover {
    background: var(--bg-light);
    color: var(--accent-color);
    padding-left: 28px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    padding: 10px 15px;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    font-size: 24px;
    color: var(--primary-color);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-menu-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

.mobile-menu-btn i {
    display: block;
    line-height: 1;
}

/* 移动端导航 */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--white);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
    z-index: 2000;
    transition: var(--transition);
    padding-top: var(--header-height, 130px);
    padding-left: 30px;
    padding-right: 30px;
    padding-bottom: 30px;
}

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

.mobile-nav-list li a {
    display: block;
    padding: 15px 0;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-list li a:hover {
    color: var(--accent-color);
}

/* 移动端语言切换 */
.mobile-lang-switch {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.mobile-lang-switch .lang-label {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
}

.lang-toggle {
    display: flex;
    position: relative;
    background: var(--bg-light);
    border-radius: 25px;
    padding: 4px;
    width: 110px;
    cursor: pointer;
}

.lang-option {
    flex: 1;
    text-align: center;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    border-radius: 20px;
    transition: all 0.3s ease;
    z-index: 1;
    user-select: none;
}

.lang-option.active {
    color: #fff;
}

.lang-slider {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    background: var(--accent-color);
    border-radius: 20px;
    transition: transform 0.3s ease;
}

/* ============ Hero Banner ============ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
    margin-top: 130px;
}

.hero-slider {
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: all 0.6s ease;
    display: flex;
    align-items: center;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.hero-content {
    max-width: 700px;
    color: var(--white);
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: 64px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 2px;
    text-shadow: 2px 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-content h2 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 400;
    margin-bottom: 20px;
    opacity: 0.95;
}

.hero-content p {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 35px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.hero-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.hero-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.hero-dot.active,
.hero-dot:hover {
    background: var(--white);
    transform: scale(1.2);
}

.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: var(--white);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    backdrop-filter: blur(5px);
}

.hero-arrow:hover {
    background: var(--white);
    color: var(--primary-color);
}

.hero-prev { left: 30px; }
.hero-next { right: 30px; }

/* ============ 服务项目 ============ */
.services {
    padding: 100px 0;
    background: var(--bg-light);
}

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

/* ============ 服务卡片 — 图片在上、文字在下 ============ */
.service-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.service-img {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.service-img {
    height: 180px;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.service-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(to top, rgba(255, 255, 255, 1), transparent);
    pointer-events: none;
}

.service-card:hover .service-img {
    transform: scale(1.03);
    transition: transform 0.4s ease;
}

.service-content {
    padding: 28px 24px 32px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.service-content h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.service-content p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
    flex: 1;
}

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

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

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

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

.about-content .section-title::after {
    left: 0;
    transform: none;
}

.about-intro {
    font-size: 17px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 35px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 35px;
}

.about-feature {
    display: flex;
    gap: 15px;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 22px;
    color: var(--accent-color);
}

.feature-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.feature-text p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

.about-stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 50px 40px;
    border-radius: 12px;
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 35px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    opacity: 0.9;
}

/* ============ 行业解决方案 ============ */
.solutions {
    padding: 100px 0;
    background: var(--bg-gray);
}

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

.solution-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.solution-img {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.solution-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
}

.solution-img i {
    font-size: 60px;
    color: var(--white);
    position: relative;
    z-index: 1;
    opacity: 0.9;
}

.solution-content {
    padding: 25px;
}

.solution-content h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.solution-content p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

/* ============ 为什么选择我们 ============ */
.why-us {
    padding: 100px 0;
    background: var(--white);
}

.why-us-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.why-us-content .section-title::after {
    left: 0;
    transform: none;
}

.why-us-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.why-us-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.why-us-icon {
    width: 40px;
    height: 40px;
    background: rgba(229, 62, 62, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.why-us-icon i {
    font-size: 18px;
    color: var(--accent-color);
}

.why-us-item h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.why-us-item p {
    font-size: 14px;
    color: var(--text-gray);
}

.why-us-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.why-us-img-inner {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(26, 54, 93, 0.3);
}

.why-us-img-inner i {
    font-size: 100px;
    color: var(--white);
    opacity: 0.9;
}

/* ============ 新闻资讯 ============ */
.news {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.news-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.news-img {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 20px;
}

.news-date {
    background: var(--white);
    padding: 12px 18px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.news-date .day {
    display: block;
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 600;
    color: var(--primary-color);
    line-height: 1;
}

.news-date .month {
    display: block;
    font-size: 12px;
    color: var(--text-gray);
    margin-top: 5px;
}

.news-content {
    padding: 25px;
}

.news-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.news-content h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-content p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.news-link:hover {
    color: var(--accent-color);
    gap: 12px;
}

/* ============ 合作伙伴 ============ */
.partners {
    padding: 80px 0;
    background: var(--white);
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
}

.partner-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    opacity: 0.6;
    transition: var(--transition);
}

.partner-item:hover {
    opacity: 1;
    transform: scale(1.05);
}

.partner-item i {
    font-size: 48px;
    color: var(--primary-color);
}

.partner-item span {
    font-size: 14px;
    color: var(--text-gray);
}

/* ============ 联系我们 ============ */
.contact {
    padding: 100px 0;
    background: var(--bg-gray);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.contact-wrapper.contact-info-only {
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 50px 40px;
    color: var(--white);
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 20px;
    color: var(--white);
}

.contact-item h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-item p {
    font-size: 14px;
    opacity: 0.9;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 40px;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.social-links i {
    font-size: 18px;
}

.contact-form {
    padding: 50px 40px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 15px;
    font-family: var(--font-body);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-color);
}

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

.btn-block {
    width: 100%;
}

/* ============ 页脚 ============ */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 0;
}

.footer .container {
    display: flex;
    justify-content: center;
}

.footer-bottom {
    padding: 18px 0;
    text-align: center;
    width: 100%;
    font-size: 14px;
    opacity: 0.85;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom a {
    margin: 0 10px;
}

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

/* ============ 返回顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(229, 62, 62, 0.4);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
}

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

    .about-wrapper,
    .why-us-wrapper,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .hero-content h1 {
        font-size: 48px;
    }

    .about-stats {
        padding: 40px 30px;
    }
}

@media (max-width: 768px) {
    .header-top {
        flex-wrap: wrap;
    }

    .header-contact {
        display: none;
    }

    .nav {
        display: none;
    }

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

    .hero {
        margin-top: 70px;
        min-height: 600px;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .hero-content h2 {
        font-size: 22px;
    }

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

    .services-grid,
    .solutions-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

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

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

    .stat-number {
        font-size: 36px;
    }

    .section-title {
        font-size: 32px;
    }

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

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

    .contact-info {
        padding: 40px 30px;
    }

    .contact-form {
        padding: 40px 30px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-content h1 {
        font-size: 28px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

    .section-title {
        font-size: 26px;
    }

    .service-card,
    .solution-card,
    .news-card {
        padding: 25px 20px;
    }

    .partners-grid {
        gap: 30px;
    }

    .about-stats {
        padding: 30px 20px;
    }

    .stats-grid {
        gap: 20px;
    }

    .stat-item {
        padding: 10px;
    }

    .stat-number {
        font-size: 32px;
    }

    .stat-label {
        font-size: 13px;
    }

    .about-image img {
        width: 100%;
        height: auto;
        max-height: 200px;
        object-fit: cover;
        border-radius: 8px;
    }

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

/* 动画效果 */
@keyframes counterUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-number {
    animation: counterUp 0.8s ease forwards;
}

/* ============ 解决方案图片样式 ============ */
.solution-img {
    height: 200px;
    position: relative;
    overflow: hidden;
}

.solution-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.solution-card:hover .solution-img img {
    transform: scale(1.1);
}

/* ============ 新闻图片样式 ============ */
.news-img {
    position: relative;
    overflow: hidden;
}

.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-img img {
    transform: scale(1.1);
}

.news-date {
    position: absolute;
    bottom: 15px;
    left: 15px;
    z-index: 2;
}

/* ============ 为什么选择我们图片样式 ============ */
.why-us-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.why-us-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.why-us-image:hover img {
    transform: scale(1.05);
}

.why-us-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.1) 0%, rgba(26, 54, 93, 0.2) 100%);
    z-index: 1;
}

/* ============ 业务展示画廊 ============ */
.partners {
    padding: 100px 0;
}

.partners .section-header {
    margin-bottom: 50px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 280px);
    gap: 20px;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
}

.gallery-item.large {
    grid-column: span 2;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(26, 54, 93, 0.85) 0%, rgba(26, 54, 93, 0.3) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 25px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 5px;
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

.gallery-overlay p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    transform: translateY(20px);
    transition: transform 0.4s ease 0.1s;
}

.gallery-item:hover .gallery-overlay h3,
.gallery-item:hover .gallery-overlay p {
    transform: translateY(0);
}

/* ============ 关于我们右侧图片 ============ */
.about-image {
    margin-top: 30px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.about-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-image:hover img {
    transform: scale(1.05);
}

/* ============ 响应式画廊 ============ */
@media (max-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(3, 250px);
    }
    
    .gallery-item.large {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .gallery-item {
        height: 200px;
    }
    
    .gallery-item.large {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-item.large {
        grid-column: span 1;
    }
}

/* ============ 物流追踪入口 ============ */
.tracking-entry {
    padding: 60px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    position: relative;
    overflow: hidden;
}

.tracking-entry::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.tracking-entry::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
    border-radius: 50%;
}

.tracking-card {
    position: relative;
    z-index: 1;
    background: var(--white);
    border-radius: 20px;
    padding: 50px 60px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.tracking-card-header {
    margin-bottom: 35px;
}

.tracking-card-header i {
    font-size: 48px;
    color: var(--accent-color);
    margin-bottom: 15px;
    display: block;
}

.tracking-card-header h3 {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.tracking-card-header p {
    font-size: 16px;
    color: var(--text-gray);
}

.tracking-form {
    display: flex;
    gap: 15px;
    max-width: 650px;
    margin: 0 auto 20px;
}

.tracking-input-wrap {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.tracking-input-wrap i {
    position: absolute;
    left: 18px;
    color: var(--accent-color);
    font-size: 18px;
}

.tracking-input-wrap input {
    width: 100%;
    padding: 16px 18px 16px 48px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 16px;
    font-family: var(--font-body);
    outline: none;
    transition: var(--transition);
    background: var(--bg-light);
}

.tracking-input-wrap input:focus {
    border-color: var(--accent-color);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(229, 62, 62, 0.1);
}

.tracking-btn {
    padding: 16px 36px;
    background: var(--accent-color);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.tracking-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(229, 62, 62, 0.4);
}

.tracking-btn i {
    font-size: 16px;
}

.tracking-tips {
    font-size: 13px;
    color: var(--text-light);
}

/* 响应式 */
@media (max-width: 768px) {
    .tracking-card {
        padding: 35px 25px;
    }

    .tracking-form {
        flex-direction: column;
        gap: 12px;
    }

    .tracking-input-wrap input {
        padding: 14px 18px 14px 46px;
    }

    .tracking-btn {
        width: 100%;
        justify-content: center;
        padding: 14px;
        border-radius: 50px;
    }

    .tracking-card-header h3 {
        font-size: 26px;
    }
}