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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.8;
    color: #333;
}

header {
    background: #fff;
    padding: 15px 5%;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #2563eb;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-menu {
    position: relative;          /* 允许 nav-slider 绝对定位 */
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 10px 18px;
    text-decoration: none;
    color: #333;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

/* ============================================================
 * 顶部导航「横线指示器 / Magic Line」
 *  - 默认停在当前激活的菜单下方
 *  - 鼠标移入其他菜单 → 横线平滑过渡到该菜单
 *  - 鼠标移开菜单 → 横线自动回到当前菜单
 * ============================================================ */
.nav-slider {
    position: absolute;
    bottom: 4px;
    left: 0;
    height: 2px;
    background: #2563eb;
    border-radius: 2px;
    pointer-events: none;
    opacity: 0;
    transition:
        transform 0.35s cubic-bezier(.4, 0, .2, 1),
        width    0.35s cubic-bezier(.4, 0, .2, 1),
        opacity  0.25s ease;
    will-change: transform, width;
}
.nav-slider.is-ready {
    opacity: 1;
}

.contact-btn {
    padding: 10px 28px;
    background: #2563eb;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 15px;
    transition: background 0.3s;
}

.contact-btn:hover {
    background: #1d4ed8;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
}

.hero {
    position: relative;
    overflow: hidden;
}

.hero-carousel {
    position: relative;
    width: 100%;
    height: calc(100vh - 80px);
    min-height: 500px;
    max-height: 700px;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    display: flex;
    align-items: center;
}

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

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

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
    width: 100%;
}

.hero-text {
    flex: 1;
    max-width: 600px;
}

.hero h1 {
    font-size: 56px;
    color: #fff;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 22px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 15px;
    font-weight: 500;
}

.hero-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 40px;
    line-height: 1.7;
}

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

.hero .btn-primary {
    background: #fff;
    color: #2563eb;
}

.hero .btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

.hero .btn-secondary {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: 2px solid rgba(255,255,255,0.4);
}

.hero .btn-secondary:hover {
    background: rgba(255,255,255,0.25);
}

.hero-image {
    flex: 1;
    max-width: 500px;
    text-align: right;
}

.hero-image img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.2));
}

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

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
}

.hero-carousel:hover .carousel-arrow {
    opacity: 1;
    visibility: visible;
}

.carousel-arrow:hover {
    background: rgba(255,255,255,0.4);
}

.carousel-arrow svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

.carousel-arrow-left {
    left: 20px;
}

.carousel-arrow-right {
    right: 20px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: all 0.3s;
}

.dot:hover {
    background: rgba(255,255,255,0.7);
}

.dot.active {
    background: #fff;
    transform: scale(1.2);
}

.btn {
    padding: 14px 36px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background: #fff;
    color: #2563eb;
}

.btn-primary:hover {
    background: #f0f0f0;
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: #fff;
}

.products {
    padding: 100px 5%;
    background: #f9fafb;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.product-card {
    background: white;
    padding: 48px 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    text-align: center;
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}

.product-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 30px;
}

.product-icon img {
    width: 100%;
    height: 100%;
}

.product-card h3 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 15px;
    font-weight: 600;
}

.product-desc {
    font-size: 15px;
    color: #666;
    margin-bottom: 25px;
    line-height: 1.7;
}

.product-features {
    list-style: none;
    margin-bottom: 30px;
}

.product-features li {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    display: inline-block;
    background: #f3f4f6;
    padding: 4px 12px;
    border-radius: 20px;
    margin-right: 8px;
}

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

.product-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
}

.product-logo img {
    width: 100%;
    height: 100%;
}

.section-title {
    font-size: 36px;
    color: #1a1a1a;
    margin-bottom: 15px;
    font-weight: 600;
}

.section-subtitle {
    font-size: 18px;
    color: #666;
}

.about {
    padding: 100px 5%;
    background: #fff;
}

.about-content {
    max-width: 900px;
    margin: 0 auto 60px;
    text-align: center;
}

.about-content h3 {
    font-size: 28px;
    color: #1a1a1a;
    margin-bottom: 25px;
}

.about-content p {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.about-image {
    max-width: 500px;
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.about-content h3 {
    font-size: 24px;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.stat-card {
    text-align: center;
    padding: 20px;
    border-radius: 12px;
}

.stat-blue {
    background: #eff6ff;
}

.stat-green {
    background: #f0fdf4;
}

.stat-card .stat-number {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-blue .stat-number {
    color: #2563eb;
}

.stat-green .stat-number {
    color: #16a34a;
}

.stat-card .stat-label {
    font-size: 14px;
    color: #666;
}

.features {
    padding: 100px 5%;
    background: #f9fafb;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.07);
    transition: all 0.3s;
}

.feature-card:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transform: translateY(-3px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 24px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 20px;
    color: #1a1a1a;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    font-size: 15px;
    color: #666;
    line-height: 1.7;
}

.meeting-features {
    padding: 100px 5%;
    background: #fff;
}

.solutions {
    padding: 100px 5%;
    background: #fff;
}

.solutions-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.solution-reverse .solution-content {
    order: 2;
}

.solution-reverse .solution-image {
    order: 1;
}

.solution-content h3 {
    font-size: 24px;
    color: #1a1a1a;
    margin-bottom: 20px;
    font-weight: 600;
}

.solution-content p {
    font-size: 16px;
    color: #666;
    margin-bottom: 25px;
    line-height: 1.7;
}

.solution-features {
    list-style: none;
}

.solution-features li {
    font-size: 15px;
    color: #666;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.solution-features li::before {
    content: '✓';
    color: #22c55e;
    font-weight: bold;
}

.solution-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.contact {
    padding: 80px 5%;
    background: #111827;
    color: #fff;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.1);
}

.contact-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
}

.contact-icon img {
    width: 100%;
    height: 100%;
}

.contact-card h3 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 12px;
    font-weight: 500;
}

.contact-card p {
    font-size: 14px;
    color: #9ca3af;
    margin-bottom: 6px;
}

/* ============================================================
 * 网站底部 hlz-footer（美化版：4 列 + 装饰条 + 快速链接 hover 动效）
 * 旧 .footer* 保留兼容以防外部代码使用
 * ============================================================ */
.hlz-footer {
    position: relative;
    margin-top: 60px;
    color: #cbd5e1;
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    font-size: 14px;
    overflow: hidden;
}

/* 顶部装饰条（品牌色 → 青色渐变） */
.hlz-footer-bar {
    height: 3px;
    background: linear-gradient(90deg, #2563eb 0%, #06b6d4 50%, #2563eb 100%);
    background-size: 200% 100%;
    animation: hlz-footer-bar-shift 6s linear infinite;
}
@keyframes hlz-footer-bar-shift {
    0%   { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* 浮动的光斑（点缀） */
.hlz-footer::before,
.hlz-footer::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
}
.hlz-footer::before {
    top: -80px;
    left: -80px;
    width: 320px;
    height: 320px;
    background: rgba(37, 99, 235, 0.15);
}
.hlz-footer::after {
    bottom: -120px;
    right: -60px;
    width: 380px;
    height: 380px;
    background: rgba(6, 182, 212, 0.12);
}
.hlz-footer-main { position: relative; z-index: 1; }

.hlz-footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.1fr 1fr;
    gap: 50px;
    padding: 64px 0 40px;
}

/* ---------- 通用列 ---------- */
.hlz-footer-col {
    min-width: 0;
}

.hlz-footer-title {
    position: relative;
    padding-left: 12px;
    margin: 0 0 22px;
    font-size: 16px;
    font-weight: 600;
    color: #f1f5f9;
    letter-spacing: 1px;
}
.hlz-footer-title-bar {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 16px;
    background: linear-gradient(180deg, #2563eb, #06b6d4);
    border-radius: 2px;
}

/* ---------- 列 1：品牌 ---------- */
.hlz-footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    margin-bottom: 16px;
}
.hlz-footer-logo img {
    height: 38px;
    width: auto;
    background: #fff;
    border-radius: 8px;
    padding: 4px 8px;
}
.hlz-footer-logo-name {
    font-size: 20px;
    font-weight: 700;
    color: #f1f5f9;
    letter-spacing: 1px;
}
.hlz-footer-desc {
    margin: 0 0 18px;
    color: #94a3b8;
    line-height: 1.7;
    font-size: 13.5px;
    max-width: 320px;
}
.hlz-footer-social {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.hlz-footer-social-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: #cbd5e1;
    background: rgba(148, 163, 184, 0.1);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 8px;
    text-decoration: none;
    transition: all .25s;
}
.hlz-footer-social-item:hover {
    color: #fff;
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

/* ---------- 列 2：快速链接（美化重点） ---------- */
.hlz-footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px 12px;
}
.hlz-footer-links li {
    margin: 0;
}
.hlz-footer-links a {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 8px 8px 0;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
    border-radius: 6px;
    transition: all .25s;
    overflow: hidden;
}
.hlz-footer-link-arrow {
    display: inline-block;
    color: #475569;
    font-size: 16px;
    line-height: 1;
    transition: all .3s cubic-bezier(.4,0,.2,1);
    transform: translateX(0);
    width: 14px;
    flex-shrink: 0;
    text-align: center;
}
.hlz-footer-link-text {
    position: relative;
    transition: transform .3s cubic-bezier(.4,0,.2,1), color .25s;
}
/* 鼠标悬停时的渐变下划线 */
.hlz-footer-link-text::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, #2563eb, #06b6d4);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s cubic-bezier(.4,0,.2,1);
}
.hlz-footer-links a:hover {
    color: #fff;
}
.hlz-footer-links a:hover .hlz-footer-link-arrow {
    color: #06b6d4;
    transform: translateX(3px);
}
.hlz-footer-links a:hover .hlz-footer-link-text {
    color: #fff;
    transform: translateX(2px);
}
.hlz-footer-links a:hover .hlz-footer-link-text::after {
    transform: scaleX(1);
}

/* ---------- 列 3：联系方式 ---------- */
.hlz-footer-contact {
    list-style: none;
    margin: 0;
    padding: 0;
}
.hlz-footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
}
.hlz-footer-contact-ico {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, rgba(37,99,235,.2), rgba(6,182,212,.2));
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 8px;
    color: #60a5fa;
    margin-top: 1px;
    transition: all .25s;
}
.hlz-footer-contact li:hover .hlz-footer-contact-ico {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    color: #fff;
    border-color: transparent;
    transform: scale(1.08);
}
.hlz-footer-contact-text {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1px;
}
.hlz-footer-contact-text small {
    color: #64748b;
    font-size: 12px;
    letter-spacing: 0.5px;
}
.hlz-footer-contact-text a,
.hlz-footer-contact-text span {
    color: #cbd5e1;
    font-size: 13.5px;
    text-decoration: none;
    word-break: break-all;
    transition: color .25s;
    line-height: 1.55;
}
.hlz-footer-contact-text a:hover { color: #fff; }

/* ---------- 列 4：二维码 / CTA ---------- */
.hlz-footer-col-qr { display: flex; flex-direction: column; }
.hlz-footer-qr {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.15);
    border-radius: 12px;
    transition: all .3s;
}
.hlz-footer-qr:hover {
    border-color: rgba(37, 99, 235, 0.4);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.15);
    transform: translateY(-2px);
}
.hlz-footer-qr-box {
    flex-shrink: 0;
    width: 88px;
    height: 88px;
    background: #fff;
    border-radius: 8px;
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hlz-footer-qr-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.hlz-footer-qr p {
    margin: 0;
    color: #cbd5e1;
    font-size: 14px;
    line-height: 1.5;
}
.hlz-footer-qr p::before {
    content: "📱 ";
}

/* 兜底 CTA（无二维码时） */
.hlz-footer-cta {
    padding: 20px;
    background: linear-gradient(135deg, rgba(37,99,235,.15), rgba(6,182,212,.15));
    border: 1px solid rgba(37, 99, 235, 0.25);
    border-radius: 12px;
    text-align: center;
}
.hlz-footer-cta-title {
    margin: 0 0 6px;
    color: #f1f5f9;
    font-size: 16px;
    font-weight: 600;
}
.hlz-footer-cta-desc {
    margin: 0 0 14px;
    color: #94a3b8;
    font-size: 13px;
    line-height: 1.6;
}
.hlz-footer-cta-btn {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    color: #fff;
    text-decoration: none;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    transition: all .25s;
}
.hlz-footer-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

/* ---------- 底部条 ---------- */
.hlz-footer-bottom {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(148, 163, 184, 0.12);
    background: rgba(15, 23, 42, 0.6);
    padding: 18px 0;
    font-size: 13px;
}
.hlz-footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.hlz-footer-copyright,
.hlz-footer-icp {
    margin: 0;
    color: #64748b;
}
.hlz-footer-icp a {
    color: #64748b;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color .25s;
}
.hlz-footer-icp a:hover { color: #94a3b8; }
.hlz-footer-icp-ico { font-size: 13px; }

/* ---------- 旧版兼容（保留旧 class） ---------- */
footer:not(.hlz-footer) {
    padding: 60px 5% 30px;
    background: #1a1a1a;
    color: #fff;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto 40px;
    gap: 60px;
}
.footer-brand h3 {
    font-size: 24px;
    color: #2563eb;
    margin-bottom: 15px;
}
.footer-brand p {
    font-size: 14px;
    color: #999;
    max-width: 300px;
}
.footer-contact h4 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 15px;
}
.footer-contact p {
    font-size: 14px;
    color: #999;
    margin-bottom: 8px;
}
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
}
.footer-bottom p {
    font-size: 14px;
    color: #666;
}

.floating-contact {
    position: fixed;
    right: 20px;
    bottom: 80px;
    z-index: 99;
}

.contact-item {
    width: 50px;
    height: 50px;
    background: #2563eb;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s;
}

.contact-item:hover {
    background: #1d4ed8;
}

.contact-item img {
    width: 24px;
    height: 24px;
}

.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: linear-gradient(135deg, #1d4ed8, #2563eb);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.5);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

.back-to-top:active {
    transform: scale(0.95);
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    /* 4 列 → 2 列 × 2 行 */
    .hlz-footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        padding: 50px 0 30px;
    }
    /* 品牌列占满整行 */
    .hlz-footer-col-brand { grid-column: 1 / -1; }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        max-width: 100%;
    }

    .solution-item {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .solution-reverse .solution-content,
    .solution-reverse .solution-image {
        order: unset;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        flex-direction: column;
        padding: 20px;
        gap: 0;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        width: 100%;
        padding: 15px 20px;
        border-bottom: 1px solid #eee;
    }

    /* 移动端：菜单竖向排列，隐藏 magic-line（自身已有 border-bottom） */
    .nav-slider {
        display: none;
    }

    .contact-btn {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    /* 移动端：底部 2 列 → 1 列 */
    .hlz-footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
        padding: 44px 0 28px;
    }
    .hlz-footer-col-brand { grid-column: auto; }
    .hlz-footer-bottom-inner { justify-content: center; text-align: center; }

    .hero {
        padding: 0;
    }

    .hero-carousel {
        min-height: 600px;
        max-height: 700px;
        height: calc(100vh - 40px);
    }

    .hero-slide {
        position: absolute;
        height: 100%;
        min-height: 600px;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
        padding: 80px 5%;
        min-height: 500px;
    }

    .hero-text {
        max-width: 100%;
        order: 2;
    }

    .hero-image {
        max-width: 100%;
        order: 1;
        margin-bottom: 30px;
    }

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

    .hero-subtitle {
        font-size: 16px;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }

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

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

    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .about-image {
        max-width: 100%;
    }

    .footer-content {
        text-align: center;
    }

    .footer-brand p {
        max-width: 100%;
    }

    .floating-contact {
        right: 15px;
        bottom: 60px;
    }

    .contact-item {
        width: 45px;
        height: 45px;
    }
}