:root {
    --primary: #0d6efd;
    --primary-dark: #0a58ca;
    --accent: #ff6b35;
    --dark: #1a1a2e;
    --light: #f8f9fa;
    --gray: #6c757d;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    color: #333;
    background: #fff;
    line-height: 1.7;
    overflow-x: hidden;
}

/* ========== 导航�?========== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    padding: 0;
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.navbar-brand {
    font-size: 26px;
    font-weight: 800;
    color: var(--dark) !important;
    letter-spacing: -0.5px;
}

.navbar-brand .brand-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    margin-left: 2px;
    vertical-align: middle;
    position: relative;
    top: -8px;
}

.navbar-nav .nav-link {
    color: var(--gray) !important;
    font-weight: 500;
    font-size: 15px;
    padding: 8px 18px !important;
    transition: var(--transition);
    position: relative;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform 0.3s;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary) !important;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    transform: scaleX(1);
}

.btn-nav {
    background: var(--primary);
    color: #fff !important;
    border-radius: 50px;
    padding: 10px 24px !important;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    border: none;
}

.btn-nav:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.35);
}
/* ========== 轮播�?========== */
.carousel {
    margin-top: 72px;
}

.carousel-img-placeholder {
    width: 100%;
    height: 60vh;
    min-height: 350px;
    max-height: 600px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.6);
    gap: 12px;
}

.carousel-img-placeholder i {
    font-size: 56px;
    opacity: 0.4;
}

.carousel-img-placeholder span {
    font-size: 18px;
    letter-spacing: 1px;
}
.carousel-item img {
    width: 100%;
    height: 60vh;
    min-height: 350px;
    max-height: 600px;
    object-fit: contain;
    background: #fff;
}
.carousel-caption {
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.5));
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 20px;
}

.carousel-caption h5 {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}
/*.carousel-caption h5.highlight {          /* 只选中轮播图里带 highlight 类的 h5 */
/*    background: linear-gradient(           /* 渐变背景：蓝色 → 橙色 */
/*        135deg,                            /* 渐变角度 135°（左上到右下） */
/*        #d4af37 0%,                 /* 蓝色 #0d6efd 从 0% 开始 */
/*        #2c2c2c 100%                 /* 橙色 #ff6b35 到 100% */
/*    );
/*    -webkit-background-clip: text;         /* 把背景裁剪成文字形状（Chrome/Safari） */
/*    -webkit-text-fill-color: transparent;  /* 文字本身变透明，露出背景色 */
/*    background-clip: text;                 /* 标准写法（Firefox 等） */
/*    text-shadow: none;                     /* 关掉阴影，否则会透出来破坏效果 */
/*}
.carousel-caption p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

/* 白色背景下的指示器和箭头 */
.carousel-indicators [data-bs-target] {
    background-color: #999;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.carousel-indicators .active {
    background-color: #333;
}
.carousel-control-prev-icon,
.carousel-control-next-icon {
    filter: invert(1) grayscale(1);
}

@media (max-width: 767px) {
    .carousel-img-placeholder {
        height: 40vh;
        min-height: 250px;
        max-height: 400px;
    }
    .carousel-item img {
        height: 40vh;
        min-height: 250px;
        max-height: 400px;
    }
    .carousel-img-placeholder i {
        font-size: 36px;
    }

    .carousel-img-placeholder span {
        font-size: 14px;
    }

    .carousel-caption h5 {
        font-size: 20px;
    }

    .carousel-caption p {
        font-size: 13px;
    }
}
/* ========== Hero 区域 ========== */
.hero {
    padding: 160px 0 100px;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(13, 110, 253, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 40%, rgba(255, 107, 53, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 0%, rgba(13, 110, 253, 0.03) 0%, transparent 50%);
}

.hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--dark);
    letter-spacing: -1px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .lead {
    font-size: 18px;
    color: var(--gray);
    max-width: 480px;
}

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

.hero-product-img {
    width: 100%;
    max-width: 420px;
    aspect-ratio: 1 / 1;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(13, 110, 253, 0.08);
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
}

/* ========== 通用区块 ========== */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--light);
}

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

.section-header .badge-custom {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(13, 110, 253, 0.08);
    color: var(--primary);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: 38px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: 17px;
    color: var(--gray);
    max-width: 560px;
    margin: 0 auto;
}

/* ========== 产品卡片 ========== */
.product-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
    height: 100%;
}

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

.product-card .product-img {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #adb5bd;
    border-bottom: 1px dashed #ced4da;
    position: relative;
    overflow: hidden;
}

.product-card .product-img .img-placeholder {
    text-align: center;
    padding: 20px;
}

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

.product-card .product-img .img-placeholder i {
    font-size: 40px;
    display: block;
    margin-bottom: 8px;
    opacity: 0.5;
}

.product-card .product-img .img-placeholder span {
    font-size: 14px;
}

.product-card .product-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

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

.product-card .product-category {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.product-card .product-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
    font-family: Georgia, "Times New Roman", "SimSun", "宋体", "Noto Serif SC", serif;
}

.product-card .product-desc {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 16px;
    line-height: 1.6;
    font-family: Georgia, "Times New Roman", "SimSun", "宋体", "Noto Serif SC", serif;

}

.product-card .product-price {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
}

.product-card .product-price .old-price {
    font-size: 15px;
    color: #adb5bd;
    text-decoration: line-through;
    margin-left: 8px;
    font-weight: 500;
}

.product-card .product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid #f0f0f0;
}

.product-card .product-rating {
    color: #ffc107;
    font-size: 14px;
}

.product-card .product-rating span {
    color: var(--gray);
    margin-left: 4px;
}

/* ========== 特色展示�?========== */
.feature-showcase {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.feature-showcase:last-child {
    margin-bottom: 0;
}

.feature-showcase.reverse {
    flex-direction: row-reverse;
}

.feature-showcase .feature-img {
    flex: 1;
    min-width: 300px;
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #adb5bd;
    border: 2px dashed #ced4da;
    text-align: center;
}

.feature-showcase .feature-img i {
    font-size: 48px;
    display: block;
    margin-bottom: 10px;
    opacity: 0.5;
}

.feature-showcase .feature-content {
    flex: 1;
}

.feature-showcase .feature-content .feature-icon-badge {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.feature-showcase .feature-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--dark);
}

.feature-showcase .feature-content p {
    font-size: 16px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.feature-showcase .feature-content .feature-list {
    list-style: none;
    padding: 0;
}

.feature-showcase .feature-content .feature-list li {
    padding: 6px 0;
    font-size: 15px;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-showcase .feature-content .feature-list li i {
    color: #20c997;
    font-size: 18px;
}

/* ========== 统计数据 ========== */
.stats-row {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-item .stat-number {
    font-size: 44px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item .stat-label {
    font-size: 15px;
    color: var(--gray);
    margin-top: 4px;
}

/* ========== 关于我们 ========== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    font-size: 17px;
    color: var(--gray);
    line-height: 1.9;
    margin-bottom: 20px;
}

.team-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #adb5bd;
    border: 2px dashed #ced4da;
    margin: 40px 0;
    text-align: center;
}

.team-img i {
    font-size: 48px;
    display: block;
    margin-bottom: 10px;
    opacity: 0.5;
}

/* ========== 联系表单 ========== */
.contact-form {
    background: #fff;
    padding: 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.contact-form .form-control {
    border-radius: 10px;
    padding: 12px 18px;
    border: 1px solid #dee2e6;
    font-size: 15px;
    transition: var(--transition);
}

.contact-form .form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.1);
}

.contact-form .btn-submit {
    background: var(--primary);
    color: #fff;
    border-radius: 50px;
    padding: 14px 36px;
    font-weight: 600;
    font-size: 16px;
    border: none;
    transition: var(--transition);
    width: 100%;
}

.contact-form .btn-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.35);
}

/* ========== 联系我们 8 格卡片 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(8, minmax(0, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.contact-card {
    background: #fff;
    border-radius: 12px;
    padding: 14px 10px 12px;
    text-align: center;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    transition: all 0.35s ease;
    border: 1px solid rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
    border-color: rgba(13, 110, 253, 0.15);
}

.contact-card-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-card-role {
    font-size: 11px;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 10px;
    background: rgba(255, 107, 53, 0.08);
    padding: 2px 8px;
    border-radius: 20px;
}

.contact-card-info {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    color: var(--gray);
    margin-bottom: 5px;
    width: 100%;
    justify-content: center;
}

.contact-card-info i {
    font-size: 15px;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-card-info a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.2s;
    word-break: break-all;
}

.contact-card-info a:hover {
    color: var(--primary);
}

.contact-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    padding-top: 10px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    width: 100%;
    justify-content: center;
}

.contact-icon-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.contact-icon-btn.wechat {
    background: rgba(7, 193, 96, 0.1);
    color: #07c160;
}

.contact-icon-btn.wechat:hover {
    background: #07c160;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(7, 193, 96, 0.35);
}

.contact-icon-btn.whatsapp {
    background: rgba(37, 211, 102, 0.1);
    color: #25d366;
}

.contact-icon-btn.whatsapp:hover {
    background: #25d366;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}

/* 响应式：中等屏幕 4 列 */
@media (max-width: 1199px) {
    .contact-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
    }
}

/* 响应式：平板 4 列 */
@media (max-width: 991px) {
    .contact-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
    }
}

/* 响应式：手机 4 列 */
@media (max-width: 575px) {
    .contact-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }
}

/* ========== 微信二维码弹窗 ========== */
.wechat-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.55);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.wechat-modal-overlay.active {
    display: flex;
}

.wechat-modal {
    background: #fff;
    border-radius: 20px;
    padding: 36px 32px 28px;
    text-align: center;
    max-width: 380px;
    width: 90%;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.wechat-modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 28px;
    color: #999;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
}

.wechat-modal-close:hover {
    color: #333;
}

.wechat-modal-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(7, 193, 96, 0.12), rgba(13, 110, 253, 0.12));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #07c160;
    margin: 0 auto 12px;
}

.wechat-modal-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.wechat-modal-id {
    font-size: 13px;
    color: var(--gray);
    margin-bottom: 20px;
}

.wechat-modal-qr {
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wechat-modal-qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.wechat-modal-qr .qr-placeholder {
    font-size: 14px;
    color: #bbb;
}

.wechat-modal-tip {
    font-size: 13px;
    color: #999;
    margin: 0 0 12px;
}

.wechat-modal-download {
    display: inline-block;
    font-size: 14px;
    color: #07c160;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 20px;
    border: 1px solid rgba(7, 193, 96, 0.3);
    border-radius: 20px;
    transition: all 0.25s;
}

.wechat-modal-download:hover {
    background: #07c160;
    color: #fff;
}

/* ========== CTA ========== */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, #023e8a 100%);
    text-align: center;
    padding: 80px 0;
}

.cta-section h2 {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.btn-cta {
    background: #fff;
    color: var(--primary);
    border-radius: 50px;
    padding: 14px 40px;
    font-weight: 700;
    font-size: 17px;
    transition: var(--transition);
    border: none;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    color: var(--primary-dark);
}

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

footer h5 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

footer .footer-brand {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}

footer .footer-about {
    font-size: 14px;
    max-width: 260px;
    line-height: 1.7;
}

footer .footer-links {
    list-style: none;
    padding: 0;
}

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

footer .footer-links li a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

footer .footer-links li a:hover {
    color: #fff;
    padding-left: 4px;
}

footer .social-links {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

footer .social-links a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 18px;
    text-decoration: none;
    transition: var(--transition);
}

footer .social-links a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(13, 110, 253, 0.35);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    color: #fff;
}
/* ========== 响应式容器宽度覆盖 ========== */
/* 小屏：增加左右内边距，避免内容贴边 */
@media (max-width: 575.98px) {
    .container {
        padding-left: 20px;
        padding-right: 20px;
    }
}

/* 大屏：扩大容器最大宽度，减少两侧大量留白 */
/* 大屏：扩大容器最大宽度，减少两侧大量留白 */
@media (min-width: 1200px) {
    .container {
        max-width: 90% !important;
    }
}

@media (min-width: 1600px) {
    .container {
        max-width: 85% !important;
    }
}
/* ========== 响应�?========== */
@media (max-width: 991px) {
    .hero {
        padding: 130px 0 60px;
        text-align: center;
    }

    .hero h1 {
        font-size: 38px;
    }

    .hero .lead {
        margin: 0 auto;
    }

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

    .hero-visual {
        margin-top: 40px;
    }

    .feature-showcase,
    .feature-showcase.reverse {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .feature-showcase .feature-img {
        flex: none;
        width: 80%;
        max-width: 400px;
        min-width: auto;
        margin: 0 auto;
    }

    .feature-showcase .feature-content .feature-list li {
        justify-content: center;
    }

    .feature-showcase .feature-content .feature-icon-badge {
        margin: 0 auto 20px;
    }

    .contact-form {
        padding: 32px;
    }
}

@media (max-width: 767px) {
    .hero h1 {
        font-size: 32px;
    }

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

    .stats-row {
        gap: 30px;
    }

    .stat-item .stat-number {
        font-size: 34px;
    }

    .section {
        padding: 60px 0;
    }
}
.lang-switch {
    display: flex;
    align-items: center;
}

.lang-switch select {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 14px;
    background: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

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

.lang-switch select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

@media (min-width: 992px) {
    .lang-switch {
        margin-left: 1rem;
        order: 3;
    }
    .navbar-brand {
        order: 0;
    }
    .navbar-toggler {
        order: 1;
    }
    .navbar-collapse {
        order: 2;
    }
}

@media (max-width: 991px) {
    .navbar > .container {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
    }
    .navbar-brand {
        order: 0;
    }
    .lang-switch {
        order: 1;
        margin-left: auto;
        margin-right: 0.5rem;
    }
    .navbar-toggler {
        order: 2;
    }
    .navbar-collapse {
        order: 3;
        width: 100%;
    }
}