/* ============================================
   NeoMem Technology - 官网样式表
   主题：白底 + 红黑配色
   字体：Noto Sans SC（本地自托管子集）
   ============================================ */

/* --- 本地字体（子集化自托管，不依赖境外 CDN） ---
   4 个字重（300/400/500/700），页面用到的 600/900 由 Bold 文件映射；
   每个文件约 115KB，覆盖网站全部字符。 */
@font-face {
    font-family: 'Noto Sans SC';
    src: url('../fonts/NotoSansSC-Light.woff2') format('woff2');
    font-weight: 300;
    font-display: swap;
}
@font-face {
    font-family: 'Noto Sans SC';
    src: url('../fonts/NotoSansSC-Regular.woff2') format('woff2');
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: 'Noto Sans SC';
    src: url('../fonts/NotoSansSC-Medium.woff2') format('woff2');
    font-weight: 500;
    font-display: swap;
}
@font-face {
    font-family: 'Noto Sans SC';
    src: url('../fonts/NotoSansSC-Bold.woff2') format('woff2');
    font-weight: 600;
    font-display: swap;
}
@font-face {
    font-family: 'Noto Sans SC';
    src: url('../fonts/NotoSansSC-Bold.woff2') format('woff2');
    font-weight: 700;
    font-display: swap;
}
@font-face {
    font-family: 'Noto Sans SC';
    src: url('../fonts/NotoSansSC-Bold.woff2') format('woff2');
    font-weight: 900;
    font-display: swap;
}

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

/* 强制字体，不随用户浏览器自定义字体改变 */
html {
    font-size: 16px; /* 基准固定px */
    -webkit-text-size-adjust: 100%; /* 防止移动端自动缩放 */
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif !important;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.6;
    color: #3E3A39;
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
}

/* 所有文字使用px单位，不随浏览器字体缩放 */
p, span, a, li, h1, h2, h3, h4, h5, h6, div, button, input, textarea, select, label {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif !important;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

ul { list-style: none; }

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

.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: #3E3A39;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: #E60F32;
}

.section-title .en {
    font-size: 14px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-top: 8px;
    font-weight: 400;
}

/* --- 强调色 --- */
.text-red { color: #E60F32; }
.text-black { color: #3E3A39; }
.bg-red { background-color: #E60F32; }
.bg-black { background-color: #3E3A39; }
.bg-light { background-color: #f8f8f8; }

/* --- 按钮 --- */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
}

.btn-red {
    background-color: #E60F32;
    color: #fff;
}

.btn-red:hover {
    background-color: #E60F32;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(230, 15, 50, 0.3);
}

.btn-outline {
    background: transparent;
    color: #E60F32;
    border: 2px solid #E60F32;
}

.btn-outline:hover {
    background: #E60F32;
    color: #fff;
}

.btn-black {
    background-color: #3E3A39;
    color: #fff;
}

.btn-black:hover {
    background-color: #3E3A39;
}

/* ============================================
   顶部导航
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid #eee;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(62, 58, 57, 0.08);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 12px;
}

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

.logo img {
    height: 44px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-text .cn {
    font-size: 14px;
    font-weight: 700;
    color: #3E3A39;
    line-height: 1.2;
}

.logo-text .en {
    font-size: 11px;
    color: #E60F32;
    letter-spacing: 1px;
    font-weight: 500;
}

/* 桌面端导航 */
.nav-menu {
    display: flex;
    gap: 4px;
}

.nav-menu > li {
    position: relative;
}

.nav-menu > li > a {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    font-size: 15px;
    font-weight: 500;
    color: #3E3A39;
    border-radius: 4px;
    transition: all 0.3s;
    position: relative;
}

.nav-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: #E60F32;
    transition: width 0.3s ease;
}

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

.nav-menu > li > a:hover {
    color: #E60F32;
}

.nav-menu > li > a.active {
    color: #E60F32;
}

/* 导航下拉菜单 */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    min-width: 160px;
    box-shadow: 0 8px 24px rgba(62, 58, 57, 0.12);
    border-radius: 0 0 8px 8px;
    border: 1px solid #eee;
    border-top: 3px solid #E60F32;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 8px 0;
    z-index: 100;
}

.nav-menu > li.has-dropdown:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    top: calc(100% + 6px);
}

.nav-dropdown li a {
    display: block;
    padding: 10px 24px;
    font-size: 14px;
    color: #555;
    transition: all 0.2s;
    text-align: center;
    white-space: nowrap;
    border-radius: 0;
}

.nav-dropdown li a:hover {
    color: #fff;
    background: #E60F32;
}

.nav-dropdown li a::after {
    display: none;
}

/* 汉堡菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #3E3A39;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单蒙层 */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(62, 58, 57, 0.5);
    z-index: 998;
}

.mobile-overlay.show { display: block; }

.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100%;
    background: #fff;
    z-index: 999;
    padding-top: 80px;
    transition: right 0.3s ease;
    box-shadow: -4px 0 20px rgba(62, 58, 57, 0.1);
}

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

.mobile-nav a {
    display: block;
    padding: 16px 24px;
    font-size: 16px;
    color: #3E3A39;
    border-bottom: 1px solid #f0f0f0;
    font-weight: 500;
}

.mobile-nav a:hover,
.mobile-nav a.active {
    color: #fff;
    background: #E60F32;
}

/* ============================================
   Banner / Hero 区域
   ============================================ */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    max-height: 900px;
    overflow: hidden;
    margin-top: 72px;
    background: #3E3A39;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-slide .bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-slide .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(62, 58, 57, 0.85) 0%, rgba(62, 58, 57, 0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-content .subtitle {
    font-size: 18px;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 6px;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 900;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 20px;
    max-width: 800px;
}

.hero-content h1 .highlight {
    color: #E60F32;
}

.hero-content .desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.75);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: 32px;
}

.hero-content .hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 轮播指示器 */
.hero-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.hero-indicators span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.hero-indicators span.active {
    background: #E60F32;
    border-color: rgba(255, 255, 255, 0.5);
    width: 36px;
    border-radius: 6px;
}

/* 往左/往右箭头 */
.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    color: #fff;
    font-size: 18px;
}

.hero-arrow:hover {
    background: #E60F32;
    border-color: #E60F32;
}

.hero-arrow.prev { left: 20px; }
.hero-arrow.next { right: 20px; }

/* ============================================
   关于我们
   ============================================ */
.about-section {
    padding: 100px 0;
    background: #fff;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
}

.about-image::after {
    content: '';
    position: absolute;
    bottom: -12px;
    right: -12px;
    width: 80px;
    height: 80px;
    border-right: 4px solid #E60F32;
    border-bottom: 4px solid #E60F32;
    border-radius: 0 0 8px 0;
}

.about-text h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    color: #3E3A39;
}

.about-text .en-title {
    font-size: 13px;
    color: #E60F32;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 24px;
    font-weight: 500;
}

.about-text p {
    font-size: 15px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 16px;
}

.app-item .icon {
    font-size: 36px;
    color: #E60F32;
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-item .icon img {
    width: 40px;
    height: auto;
    display: block;
}

/* 核心数据 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 24px 12px;
    background: #f8f8f8;
    border-radius: 8px;
    border: 1px solid #eee;
    transition: all 0.3s;
}

.stat-item:hover {
    border-color: #E60F32;
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(230, 15, 50, 0.08);
}

.stat-item .number {
    font-size: 28px;
    font-weight: 900;
    color: #E60F32;
    margin-bottom: 6px;
}

.stat-item .label {
    font-size: 13px;
    color: #888;
    font-weight: 400;
}

/* ============================================
   业务/产品
   ============================================ */
.products-section {
    padding: 100px 0;
    background: #f8f8f8;
}

.products-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

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

.product-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #eee;
    transition: all 0.3s ease;
}

.product-card:hover {
    border-color: #E60F32;
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(230, 15, 50, 0.08);
}

.product-card .img-wrap {
    height: 220px;
    overflow: hidden;
    background: #fafafa;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.product-card .img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.product-card .info h3 {
    font-size: 18px;
    font-weight: 700;
    color: #3E3A39;
    margin-bottom: 8px;
}

.product-card .info .tag {
    display: inline-block;
    padding: 3px 10px;
    font-size: 11px;
    background: #E60F32;
    color: #fff;
    border-radius: 3px;
    margin-bottom: 10px;
    font-weight: 500;
}

.product-card .info p {
    font-size: 14px;
    color: #777;
    line-height: 1.6;
}

.product-card .info .more-link {
    display: inline-block;
    margin-top: 12px;
    font-size: 13px;
    color: #E60F32;
    font-weight: 500;
}

.product-card .info .more-link:hover {
    color: #E60F32;
}

/* ============================================
   应用领域
   ============================================ */
.app-section {
    padding: 100px 0;
    background: #fff;
}

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

.app-item {
    text-align: center;
    padding: 32px 16px;
    background: #fafafa;
    border-radius: 12px;
    border: 1px solid #eee;
    transition: all 0.3s ease;
    cursor: pointer;
}

.app-item:hover {
    border-color: #E60F32;
    box-shadow: 0 4px 16px rgba(62, 58, 57, 0.06);
}

.app-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: #3E3A39;
    margin-bottom: 6px;
}

.app-item p {
    font-size: 13px;
    color: #999;
}

/* ============================================
   新闻动态
   ============================================ */
.news-section {
    padding: 100px 0;
    background: #f8f8f8;
}

.news-tabs {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 36px;
}

.news-tabs button {
    padding: 8px 24px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid #ddd;
    background: #fff;
    color: #666;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 4px;
    font-family: 'Noto Sans SC', sans-serif !important;
}

.news-tabs button.active {
    background: #E60F32;
    color: #fff;
    border-color: #E60F32;
}

.news-tabs button:hover:not(.active) {
    border-color: #E60F32;
    color: #E60F32;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.news-item {
    background: #fff;
    border-radius: 10px;
    border: 1px solid #eee;
    padding: 24px;
    transition: all 0.3s;
}

.news-item:hover {
    border-color: #E60F32;
    box-shadow: 0 4px 16px rgba(62, 58, 57, 0.06);
}

.news-item .date {
    font-size: 12px;
    color: #E60F32;
    font-weight: 500;
    margin-bottom: 8px;
}

.news-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: #3E3A39;
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-item p {
    font-size: 14px;
    color: #888;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    text-align: center;
    margin-top: 36px;
}

/* ============================================
   合作伙伴
   ============================================ */
.partners-section {
    padding: 70px 0;
    background: #fff;
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.partner-logos img {
    height: 90px;
    width: auto;
    object-fit: contain;
    transition: all 0.3s;
}

.partner-logos img:hover {
    opacity: 0.85;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: #3E3A39;
    padding: 60px 0 0;
    color: #ccc;
}

.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, 0.08);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: #E60F32;
}

.footer-col p, .footer-col a {
    font-size: 14px;
    color: #999;
    line-height: 1.8;
}

.footer-col a:hover {
    color: #E60F32;
}

.footer-contact li {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 14px;
    color: #999;
}

.footer-contact .icon {
    color: #E60F32;
    flex-shrink: 0;
    margin-top: 3px;
    width: 16px;
    text-align: center;
}

.footer-contact .icon img {
    width: 16px;
    height: auto;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: #666;
}

/* Footer 居中（单列） */
.footer-grid-centered {
    grid-template-columns: 1fr !important;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.footer-grid-centered .footer-col h4 {
    text-align: center;
}

.footer-grid-centered .footer-col h4::after {
    left: 50%;
    transform: translateX(-50%);
}

.footer-grid-centered .footer-contact {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 60px;
    flex-wrap: wrap;
}

.footer-grid-centered .footer-contact li {
    margin-bottom: 0;
    text-align: left;
}

/* ============================================
   Cooperation 页面
   ============================================ */
.page-hero {
    margin-top: 72px;
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #3E3A39;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(230, 15, 50, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.page-hero h1 {
    font-size: 36px;
    color: #fff;
    font-weight: 700;
    z-index: 1;
    text-align: center;
}

.page-hero p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
    text-align: center;
    z-index: 1;
}

.cooperation-section {
    padding: 80px 0;
    background: #f8f8f8;
}

.coop-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.coop-info {
    padding: 40px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #eee;
}

.coop-info h3 {
    font-size: 22px;
    font-weight: 700;
    color: #3E3A39;
    margin-bottom: 20px;
}

.coop-info .info-item {
    display: flex;
    gap: 14px;
    margin-bottom: 20px;
    font-size: 15px;
    color: #555;
    line-height: 1.6;
}

.coop-info .info-item .icon {
    color: #E60F32;
    flex-shrink: 0;
    font-size: 20px;
    width: 24px;
    text-align: center;
}

.coop-info .info-item .icon img {
    width: 20px;
    height: auto;
}

.form-card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid #eee;
    padding: 40px;
}

.form-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #3E3A39;
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #3E3A39;
    margin-bottom: 6px;
}

.form-group label .required {
    color: #E60F32;
    margin-right: 3px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fafafa;
    color: #3E3A39;
    transition: all 0.3s;
    outline: none;
    font-family: 'Noto Sans SC', sans-serif !important;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #E60F32;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(230, 15, 50, 0.06);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #bbb;
}

.form-submit {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    background: #E60F32;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: 'Noto Sans SC', sans-serif !important;
}

.form-submit:hover {
    background: #E60F32;
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ============================================
   加入我们 页面
   ============================================ */
.join-section {
    padding: 80px 0;
    background: #fff;
}

.join-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.join-text h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #3E3A39;
}

.join-text p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.join-text .contact-link {
    color: #E60F32;
    font-weight: 500;
}

.join-qrcode {
    text-align: center;
    padding: 30px;
    background: #f8f8f8;
    border-radius: 12px;
}

.join-qrcode img {
    width: 180px;
    height: 180px;
    margin: 0 auto 16px;
}

.join-qrcode p {
    font-size: 13px;
    color: #999;
}

/* ============================================
   关于我们子页面
   ============================================ */
.about-sub-section {
    padding: 60px 0;
    background: #fff;
}

.about-sub-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-sub-content p {
    font-size: 15px;
    color: #555;
    line-height: 2;
    margin-bottom: 16px;
}

.timeline {
    position: relative;
    padding-left: 30px;
    margin-top: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #eee;
}

.timeline-item {
    position: relative;
    padding-bottom: 30px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #E60F32;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px #E60F32;
}

.timeline-item .year {
    font-size: 18px;
    font-weight: 700;
    color: #E60F32;
    margin-bottom: 6px;
}

.timeline-item .text {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* ============================================
   响应式 - 移动端适配
   ============================================ */
@media (max-width: 1024px) {
    .about-grid { gap: 40px; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .app-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .mobile-nav { display: block; }

    .nav-menu { display: none; }

    .hero-content {
        padding: 0 24px;
    }

    .hero-content .subtitle {
        font-size: 13px;
        letter-spacing: 4px;
    }

    .hero-content h1 {
        font-size: 30px;
    }

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

    .hero-arrow { display: none; }

    .section { padding: 50px 0; }

    .section-title h2 {
        font-size: 24px;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .stat-item { padding: 18px 10px; }
    .stat-item .number { font-size: 22px; }

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

    .app-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .app-item { padding: 20px 12px; }
    .app-item .icon { font-size: 28px; }

    .news-grid { grid-template-columns: 1fr; }
    .news-tabs { flex-wrap: wrap; }

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

    .coop-layout { grid-template-columns: 1fr; }
    .coop-info { padding: 24px; }
    .form-card { padding: 24px; }

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

    .page-hero h1 { font-size: 26px; }

    .about-image::after { display: none; }
}

@media (max-width: 480px) {
    .hero-content h1 { font-size: 24px; }
    .hero { min-height: 500px; max-height: 650px; }
    .stat-item { padding: 14px 8px; }
    .stat-item .number { font-size: 20px; }
    .stat-item .label { font-size: 12px; }
    .partner-logos { gap: 20px; }
    .partner-logos img { height: 65px; }
}

/* ============================================
   动画
   ============================================ */
/* 仅当 JS 可用时才初始隐藏 .fade-in，避免无 JS 环境下内容不可见（SEO/可用性） */
html.js .fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* 尊重用户“减少动态效果”的系统设置 */
@media (prefers-reduced-motion: reduce) {
    html.js .fade-in {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}