/* ============================================
   力拓斯企业官网 - 公共样式
   ============================================ */

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0a2e5c;
    --primary-light: #1a4d8c;
    --accent: #e8731c;
    --accent-light: #f59e4c;
    --dark: #1a1a2e;
    --gray-dark: #4a4a4a;
    --gray: #7a7a7a;
    --gray-light: #e8e8e8;
    --gray-bg: #f5f7fa;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --radius: 4px;
    --max-width: 1200px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--gray-dark);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ---------- 通用容器 ---------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--dark);
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.section-title .subtitle {
    font-size: 0.95rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.section-title .divider {
    width: 50px;
    height: 3px;
    background: var(--accent);
    margin: 16px auto 0;
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: transparent;
    color: var(--accent);
}

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

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

/* ---------- 顶部导航 ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 46, 92, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 46, 92, 0.98);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    line-height: 1;
}

.logo .logo-img {
    display: block;
    height: 56px;
    width: auto;
}

.logo .logo-text-img {
    display: block;
    height: 56px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.85);
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    letter-spacing: 1px;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--white);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 60%;
}

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

.nav-toggle span {
    width: 26px;
    height: 3px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ---------- 语言切换 ---------- */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 12px;
    white-space: nowrap;
}

.lang-switch a {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
    letter-spacing: 0.5px;
    text-decoration: none;
}

.lang-switch a.active {
    color: var(--accent);
    font-weight: 600;
}

.lang-switch a:hover {
    color: var(--white);
}

.lang-switch .lang-divider {
    color: rgba(255, 255, 255, 0.25);
    font-size: 0.8rem;
}

/* ---------- Hero 区域 ---------- */
.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(135deg, rgba(10, 46, 92, 0.92), rgba(26, 74, 140, 0.88)),
                url('../images/factory-bg.jpg') center/cover no-repeat;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent);
}

.hero-content {
    max-width: 700px;
    animation: fadeInUp 1s ease;
}

.hero-content .tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(232, 115, 28, 0.2);
    border: 1px solid rgba(232, 115, 28, 0.5);
    color: var(--accent-light);
    font-size: 0.85rem;
    letter-spacing: 2px;
    border-radius: 30px;
    margin-bottom: 24px;
}

.hero-content h1 {
    font-size: 3.2rem;
    color: var(--white);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero-content h1 span {
    color: var(--accent);
}

.hero-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* ---------- 页面内页 Hero ---------- */
.page-hero {
    height: 160px;
    background: linear-gradient(135deg, rgba(10, 46, 92, 0.92), rgba(26, 74, 140, 0.88)),
                url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?w=1920&q=80') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: 80px;
    position: relative;
}

.page-hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent);
}

.page-hero h1 {
    font-size: 2.5rem;
    color: var(--white);
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.page-hero p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    letter-spacing: 2px;
}

/* ---------- 首页 - 核心优势 ---------- */
.advantages {
    background: var(--gray-bg);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--white);
    padding: 40px 28px;
    text-align: center;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

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

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-card .icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    transition: var(--transition);
}

.advantage-card:hover .icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    transform: rotate(360deg);
}

.advantage-card h3 {
    font-size: 1.15rem;
    color: var(--dark);
    margin-bottom: 12px;
    font-weight: 600;
}

.advantage-card p {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.7;
}

/* ---------- 首页 - 产品预览 ---------- */
.product-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    display: block;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.product-card .img-box {
    height: 220px;
    overflow: hidden;
    position: relative;
}

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

.product-card:hover .img-box img {
    transform: scale(1.08);
}

.product-card .img-box .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(10, 46, 92, 0.6), transparent);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.product-card:hover .img-box .overlay {
    opacity: 1;
}

.product-card .img-box .overlay span {
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
}

.product-card .card-body {
    padding: 24px;
}

.product-card .card-body h3 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.product-card .card-body p {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 16px;
}

.product-card .card-body .more {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-card .card-body .more:hover {
    gap: 12px;
}

/* ---------- 首页 - 数据统计 ---------- */
.stats {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
}

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

.stat-item h2 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-item h2 .unit {
    font-size: 1.5rem;
}

.stat-item p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 1px;
}

/* ---------- CTA 区域 ---------- */
.cta {
    background: var(--gray-bg);
    text-align: center;
}

.cta-box {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    padding: 60px 40px;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: rgba(232, 115, 28, 0.1);
    border-radius: 50%;
}

.cta-box::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -30px;
    width: 250px;
    height: 250px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.cta-box h2 {
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-box p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

/* ---------- 关于我们 ---------- .about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro .text-content h2 {
    font-size: 1.8rem;
    color: var(--dark);
    margin-bottom: 20px;
    font-weight: 700;
}

.about-intro .text-content .accent-line {
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin-bottom: 24px;
}

.about-intro .text-content p {
    color: var(--gray-dark);
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-intro .image-box {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    height: 400px;
}

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

/* 关于 - 企业理念 */
.about-values {
    background: var(--gray-bg);
}

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

.value-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.value-card .num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.2;
    margin-bottom: 12px;
}

.value-card h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 16px;
    font-weight: 700;
}

.value-card p {
    color: var(--gray);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* 关于 - 发展历程 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    background: var(--gray-light);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 40px 40px 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding: 0 0 40px 40px;
    text-align: left;
}

.timeline-item::after {
    content: '';
    position: absolute;
    right: -7px;
    top: 6px;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    border: 3px solid var(--white);
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    right: auto;
    left: -7px;
}

.timeline-item .year {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 6px;
}

.timeline-item h4 {
    font-size: 1.05rem;
    color: var(--dark);
    margin-bottom: 6px;
}

.timeline-item p {
    font-size: 0.85rem;
    color: var(--gray);
}

/* ---------- 产品服务页 ---------- */
.product-category {
    margin-bottom: 60px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 30px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--gray-light);
}

.category-header .cat-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--white);
    flex-shrink: 0;
}

.category-header h3 {
    font-size: 1.4rem;
    color: var(--dark);
    font-weight: 700;
}

.category-header p {
    font-size: 0.9rem;
    color: var(--gray);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-item {
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.product-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.product-item .img-box {
    height: 200px;
    overflow: hidden;
    background: var(--gray-bg);
}

.product-item .img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-item:hover .img-box img {
    transform: scale(1.06);
}

.product-item .item-body {
    padding: 20px;
}

.product-item .item-body h4 {
    font-size: 1.05rem;
    color: var(--dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.product-item .item-body p {
    font-size: 0.85rem;
    color: var(--gray);
    line-height: 1.7;
}

/* 服务流程 */
.service-flow {
    background: var(--gray-bg);
}

.flow-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    position: relative;
}

.flow-step {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    position: relative;
}

.flow-step .step-num {
    width: 40px;
    height: 40px;
    background: var(--accent);
    color: var(--white);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.flow-step h4 {
    font-size: 1.05rem;
    color: var(--dark);
    margin-bottom: 8px;
    font-weight: 600;
}

.flow-step p {
    font-size: 0.82rem;
    color: var(--gray);
}

/* ---------- 联系我们页 ---------- */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.contact-info-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 3px solid transparent;
}

.contact-info-card:hover {
    border-top-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.contact-info-card .icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: var(--gray-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.contact-info-card h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 10px;
    font-weight: 600;
}

.contact-info-card p {
    color: var(--gray);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* 联系表单 */
.contact-bottom {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 720px;
    margin: 0 auto;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.4rem;
    color: var(--dark);
    margin-bottom: 24px;
    font-weight: 700;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--gray-dark);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--gray-dark);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(232, 115, 28, 0.1);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-submit {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
}

.form-submit:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 115, 28, 0.4);
}

.form-submit:active {
    transform: translateY(0);
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.05rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-col p {
    font-size: 0.85rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.footer-col .footer-logo {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    line-height: 1;
}

.footer-col .footer-logo-img {
    display: block;
    height: 70px;
    width: auto;
}

.footer-col .footer-logo-text-img {
    display: block;
    height: 70px;
    width: auto;
}

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

.footer-col ul li a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col ul li a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-col .contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col .contact-list li .icon {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

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

.back-to-top:hover {
    background: var(--accent);
    transform: translateY(-4px);
}

/* ---------- 动画 ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
    .advantage-grid,
    .stats-grid,
    .flow-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .about-intro .image-box {
        height: 300px;
    }

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

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

    .hero-content h1 {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(10, 46, 92, 0.98);
        flex-direction: column;
        padding: 20px 0;
        gap: 0;
        transform: translateY(-150%);
        transition: var(--transition);
    }

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

    .nav-menu a {
        padding: 14px 24px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content h1 {
        font-size: 1.9rem;
    }

    .hero-content p {
        font-size: 0.95rem;
    }

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

    .section {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    .advantage-grid,
    .product-preview-grid,
    .product-grid,
    .stats-grid,
    .flow-grid {
        grid-template-columns: 1fr;
    }

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

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

    .timeline-item {
        width: 100%;
        padding: 0 0 30px 40px;
        text-align: left;
    }

    .timeline-item:nth-child(even) {
        left: 0;
        padding: 0 0 30px 40px;
    }

    .timeline::before {
        left: 14px;
    }

    .timeline-item::after {
        right: auto;
        left: 7px;
    }

    .stat-item h2 {
        font-size: 2.2rem;
    }
}