/* ========================================
   陆吾智能官网样式 - 完整版
   ======================================== */

/* CSS Variables */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #60a5fa;
    --color-orange: #ff8c00;
    --color-orange-light: #ffb347;
    --color-dark: #042054;;
    --color-darker: #0f0f1a;
    --color-text: #333;
    --color-text-light: #666;
    --color-text-muted: #999;
    --color-white: #fff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e7;
    --color-gray-300: #d1d1d6;
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 1rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --max-width: 1200px;
    --header-height: 60px;
    
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --border-radius: 8px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* 防止移动端滑动出现白边 */
main {
    width: 100%;
    overflow-x: hidden;
}

section {
    width: 100%;
    overflow-x: hidden;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-y: auto;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    position: relative;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    -webkit-user-select: none;
    user-select: none;
    pointer-events: auto;
}

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

ul {
    list-style: none;
}

.container {
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
    max-width: var(--max-width);
    overflow-x: hidden;
}

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

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-white);
    height: var(--header-height);
    transition: background var(--transition-base);
}

.header-light {
    background: var(--color-white);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.header-light .nav-link {
    color: var(--color-text);
}

.header-light .nav-link:hover {
    color: #222222;
}

.header-light .nav-link.active {
    color: #222222;
    transform: scale(1.08);
    font-weight: 500;
}

.header-light .logo {
    color: var(--color-text);
}

.page-home .header {
    background: var(--color-white);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.page-home .nav-link {
    color: #5b6472;
}

.page-home .nav-link:hover {
    color: #222222;
}

.page-home .nav-link.active {
    color: #222222;
    transform: scale(1.08);
    font-weight: 500;
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-image {
    height: 36px;
    width: auto;
    display: block;
    filter: none;
}

.logo-icon {
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-name {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.logo-sub {
    font-size: 0.625rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 1px;
}

.logo svg {
    height: 32px;
    width: 32px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9375rem;
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition-base);
}

.nav-lang {
    min-width: 72px;
    justify-content: center;
}

.nav-link:hover {
    color: #222222;
}

.nav-link.active {
    color: #222222;
    transform: scale(1.08);
    font-weight: 500;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #000000;
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.dropdown-arrow {
    font-size: 10px;
    margin-left: 2px;
}

/* Dropdown */
.dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-white);
    min-width: 150px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xs) 0;
    z-index: 100;
}

.dropdown li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--color-text);
    font-size: 0.875rem;
}

.dropdown li a:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.nav-item.has-dropdown.dropdown-open .dropdown {
    display: block;
}

/* 下拉菜单打开时，机器人标签显示选中状态 */
.nav-item.has-dropdown.dropdown-open > .nav-link {
    color: #222222 !important;
    transform: scale(1.08);
    font-weight: 500;
}

.nav-item.has-dropdown.dropdown-open > .nav-link::after {
    width: 100%;
}

.dropdown.dropdown-mega {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-height);
    width: 100vw;
    transform: none;
    padding: 24px 10%;
    background: #fff;
    border-radius: 0;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
    border-top: 1px solid #eee;
}

.dropdown.dropdown-mega .mega-menu {
    display: grid;
    grid-template-columns: repeat(4, minmax(160px, 1fr));
    gap: 24px;
}

.dropdown.dropdown-mega .mega-title {
    font-size: 0.875rem;
    color: #6b7280;
    margin-bottom: 14px;
}

.dropdown.dropdown-mega .mega-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.dropdown.dropdown-mega .mega-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: var(--color-white);
    border-radius: 12px;
    padding: 10px 12px;
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.dropdown.dropdown-mega .mega-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.12);
}

.dropdown.dropdown-mega .mega-card-media {
    width: 100%;
    height: 86px;
    border-radius: 10px;
    background: #eef2f7;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.dropdown.dropdown-mega .mega-card-media img {
    max-width: 90%;
    max-height: 80px;
    object-fit: contain;
}

.dropdown.dropdown-mega .mega-card-name {
    font-size: 0.875rem;
    color: #111827;
}

/* ========================================
   Mega Menu V2 - 按系列分组
   ======================================== */
.dropdown.dropdown-mega .mega-menu-v2 {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mega-series {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mega-series-title {
    font-size: 0.8125rem;
    color: #6b7280;
    font-weight: 500;
}

.mega-series-items {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.mega-card-v2 {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: #eef2f7;
    border-radius: 8px;
    padding: 10px;
    width: 110px;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.mega-card-v2:hover {
    border-color: var(--color-primary);
}

.mega-card-v2.active {
    border-color: var(--color-primary);
}

.mega-card-media-v2 {
    width: 90px;
    height: 70px;
    background: #eef2f7;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.mega-card-media-v2 img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.mega-card-name-v2 {
    font-size: 0.75rem;
    color: #374151;
    text-align: center;
    white-space: nowrap;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition-base);
}

.header-light .mobile-menu-btn span,
.page-home .mobile-menu-btn span {
    background: var(--color-text);
}

/* 桌面端隐藏移动端产品菜单 */
.mobile-robots-menu {
    display: none;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--color-primary-dark);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-pill {
    border-radius: 50px;
    padding: 0.75rem 1.75rem;
}

.home-product-card .btn-pill {
    font-size: 0.9375rem;
    width: 140px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.home-product-card:hover .btn-pill {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-arrow {
    font-size: 1.25rem;
    margin-left: 4px;
}

/* ========================================
   Hero Section - Home
   ======================================== */
.hero {
    min-height: 100vh;
    padding-top: var(--header-height);
    position: relative;
    overflow: hidden;
}

.hero-home {
    background: linear-gradient(180deg, #1e2235 0%, #252a3d 50%, #1a1e2e 100%);
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(40, 50, 80, 0.5) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(30, 40, 60, 0.4) 0%, transparent 50%);
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 520px;
    flex-shrink: 0;
}

.hero-title {
    font-size: clamp(3rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
    letter-spacing: 1px;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-image {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-left: var(--spacing-lg);
}

.hero-image img {
    max-width: 100%;
    max-height: 75vh;
    object-fit: contain;
}

/* ========================================
   Home Page Redesign
   ======================================== */

.home-hero {
    position: relative;
    padding-top: 0;
}

.home-hero-bg {
    width: 100%;
    height: auto;
    display: block;
}

.home-hero-inner {
    position: absolute;
    top: 5vh;
    left: 0;
    padding: var(--spacing-2xl) 10%;
    display: flex;
    align-items: center;
}

.home-hero-content {
    color: var(--color-white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0;
    max-width: 900px;
}

.home-hero-title {
    font-size: 50px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 24px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.home-hero-subtitle {
    font-size: 21px;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
    max-width: none;
    margin-bottom: 48px;
    letter-spacing: 1px;
}

.home-hero .btn {
    padding: 12px 36px;
    font-size: 16px;
    align-self: flex-start;
}

.home-hero-visual {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    overflow: hidden;
}

.home-hero-image {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.hero-platform {
    position: absolute;
    bottom: 0;
    background: #2f3753;
    border-radius: 18px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
}

.hero-platform--left {
    width: 180px;
    height: 120px;
    left: 0;
    bottom: -20px;
}

.hero-platform--right {
    width: 360px;
    height: 170px;
    right: 0;
    bottom: -20px;
}

.hero-robot {
    position: absolute;
}

.hero-robot--small {
    width: 180px;
    left: 10px;
    bottom: 40px;
}

.hero-robot--large {
    width: 420px;
    right: 20px;
    bottom: 70px;
}

.home-products {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.home-products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.home-product-card {
    background: radial-gradient( 0% 0% at 0% 0%, #D5D7E1 0.61%, #F0F1F5 98.9%), #E6E9ED;
    padding: var(--spacing-xl);
    text-align: center;
    display: flex;
    flex-direction: column;
    height: 100%;
    align-items: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.home-product-card:hover {
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.home-product-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #2c2f3a;
    margin-bottom: 6px;
}

.home-product-subtitle {
    font-size: 0.75rem;
    color: #7b8091;
    margin-bottom: var(--spacing-sm);
}

.home-product-desc {
    font-size: 0.8125rem;
    color: #36393E;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.home-product-image {
    margin-top: var(--spacing-lg);
    min-height: 240px;
    max-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: var(--spacing-md) 0;
}

.home-product-image img {
    max-width: 100%;
    max-height: 240px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform 0.4s ease;
}

.home-product-card:hover .home-product-image img {
    animation: robotFloat 2s ease-in-out infinite;
}

@keyframes robotFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.home-gallery {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.home-gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    justify-content: center;
}

.home-gallery-item {
    position: relative;
    aspect-ratio: 16/9;
    border-radius: 18px;
    overflow: hidden;
}

.home-gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.home-gallery-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 18px;
}

.home-gallery-video {
    display: block;
}

.home-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: none;
    border: none;
    cursor: pointer;
}

.home-competition {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.home-section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.home-section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.home-section-desc {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.home-competition-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-lg);
}

.home-competition-main,
.home-competition-tile {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
}

.home-competition-main img,
.home-competition-tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.home-competition-side {
    display: grid;
    grid-template-rows: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.home-competition-badge {
    position: absolute;
    left: 16px;
    bottom: 16px;
    background: rgba(0, 0, 0, 0.7);
    color: var(--color-white);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.75rem;
}

/* ========================================
   Partners Section
   ======================================== */
.home-partners {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-bg-light);
}

.home-partners .home-section-title {
    color: var(--color-text);
}

.home-partners .home-section-desc {
    color: var(--color-text-light);
}

.home-partners-category {
    margin-bottom: var(--spacing-xl);
}

.home-partners-category:last-child {
    margin-bottom: 0;
}

.home-partners-category-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xs);
    border-left: 3px solid var(--color-primary);
}

.home-partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.home-partner-img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.home-partner-img:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* ========================================
   Hero Banner (Sub pages)
   ======================================== */
.hero-banner {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: calc(var(--header-height) + var(--spacing-xl)) var(--spacing-2xl) var(--spacing-xl);
    position: relative;
}

.hero-bg-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #e8f4fc 0%, #c9e2f5 50%, #a8d4f0 100%);
    z-index: 0;
}

.hero-support .hero-bg-gradient {
    display: none;
}

/* About Hero - 图片作为背景 */
.hero-banner.hero-about {
    min-height: auto !important;
    padding: 0 !important;
    display: block !important;
    position: relative;
}

.hero-banner.hero-about .hero-banner-content {
    position: absolute;
    top: 50%;
    left: 15%;
    transform: translateY(-50%);
    z-index: 2;
    padding-top: var(--header-height);
    width: 500px;
}

.hero-banner.hero-about .hero-banner-image {
    width: 100%;
    line-height: 0;
}

.hero-banner.hero-about .hero-banner-image img {
    width: 100%;
    height: auto;
    display: block;
    max-width: none !important;
}

/* Support Hero - 图片作为背景 */
.hero-banner.hero-support {
    min-height: auto !important;
    padding: 0 !important;
    display: block !important;
    position: relative;
}

.hero-banner.hero-support .hero-banner-content {
    position: absolute;
    top: 50%;
    left:15%;
    transform: translateY(-50%);
    z-index: 2;
    padding-top: var(--header-height);
    width: 500px;
}

.hero-banner.hero-support .hero-banner-image {
    width: 100%;
    line-height: 0;
}

.hero-banner.hero-support .hero-banner-image img {
    width: 100%;
    height: auto;
    display: block;
    max-width: none !important;
}

.hero-banner-content {
    position: relative;
    z-index: 1;
    max-width: 500px;
}

.hero-banner .hero-title {
    color: var(--color-dark);
    font-size: 2.5rem;
}


.hero-banner-image {
    position: relative;
    z-index: 1;
}

.hero-banner-image img {
    max-width: 500px;
}

/* ========================================
   Products Section
   ======================================== */
.products-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
    position: relative;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.product-header {
    margin-bottom: var(--spacing-sm);
}

.product-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.product-series {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.product-desc {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.product-image {
    margin-top: var(--spacing-md);
    text-align: center;
}

.product-image img {
    max-height: 200px;
    margin: 0 auto;
}

/* ========================================
   Video Gallery
   ======================================== */
.video-gallery {
    background: var(--color-darker);
    padding: var(--spacing-xl) 0;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.video-item {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.video-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-main {
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-btn {
    position: absolute;
    background: none;
    border: none;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.play-btn:hover {
    transform: scale(1.1);
}

/* ========================================
   Competition Section
   ======================================== */
.competition-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.section-desc {
    font-size: 0.875rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

.competition-images {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-sm);
}

.competition-img {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.competition-img img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.competition-badge {
    position: absolute;
    bottom: var(--spacing-sm);
    left: var(--spacing-sm);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* ========================================
   Download Section (Support Page)
   ======================================== */
.download-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.download-card {
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    text-decoration: none;
    color: inherit;
}

.download-card:hover {
    box-shadow: var(--shadow-md);
}

.download-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-sm);
    border-radius: 16px;
    overflow: hidden;
}

.download-icon.placeholder {
    background: var(--color-gray-200);
}

.download-icon img,
.download-icon svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.download-name {
    font-size: 0.875rem;
    color: var(--color-text);
}

/* ========================================
   About Page Styles
   ======================================== */
.about-intro {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.about-content {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
}

.about-text {
    flex: 1;
    font-size: 0.875rem;
    line-height: 2;
    color: var(--color-text);
}

.about-text p {
    text-indent: 2em;
    margin-bottom: var(--spacing-sm);
}

.about-image {
    flex-shrink: 0;
}

.about-image img {
    width: 350px;
    border-radius: var(--border-radius);
}

/* Market Section */
.market-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-gray-50);
}

.market-item {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.market-image img {
    width: 280px;
    border-radius: var(--border-radius);
}

.market-info {
    flex: 1;
}

.market-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.market-desc {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.market-stat {
    margin: var(--spacing-sm) 0;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-unit {
    font-size: 1rem;
    color: var(--color-text-light);
}

.market-detail,
.market-note {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

/* Wiki Section */
.wiki-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.wiki-text {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.wiki-qrcode img {
    width: 180px;
    margin: 0 auto;
}

/* ========================================
   Lulu Page Styles
   ======================================== */
.page-lulu .header-light {
    background: var(--color-white);
}

.hero-lulu {
    min-height: auto;
    padding: 0;
    padding-top: var(--header-height);
    position: relative;
    background: linear-gradient(135deg, #8b9098 0%, #a8adb5 50%, #8b9098 100%);
    display: block;
    overflow: visible;
}

.hero-lulu-bg {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    object-position: center;
}

.hero-lulu .hero-content {
    position: absolute;
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    max-width: 600px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

/* 产品名称 - 斜体橙色 */
.hero-product-name {
    font-size: 1.5rem;
    font-style: italic;
    font-weight: 600;
    color: var(--color-orange);
    margin: 0;
    letter-spacing: 1px;
}

/* Hero 标题样式 */
.hero-lulu .hero-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: #ffffff;
    margin: 0;
    line-height: 1.2;
}

/* 橙色标签按钮 */
.hero-tag {
    display: inline-block;
    background: var(--color-orange);
    color: #fff;
    padding: 8px 24px;
    border-radius: 30px;
    font-size: 0.9375rem;
    font-weight: 500;
    margin: 8px 0;
}

.hero-title-orange {
    color: var(--color-orange) !important;
}

.hero-features {
    display: flex;
    gap: var(--spacing-sm);
    color: #ffffff;
    font-size: 0.9375rem;
    flex-wrap: wrap;
}

.hero-features .divider {
    color: #5c6370;
}

.product-intro {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-white);
}

.intro-text {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* Features Section */
.features-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-md);
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(0% 0% at 0% 0%, #D1D5E2 0.61%, #EEF0F6 98.9%), #F4F5F7;
    border-radius: 16px;
    z-index: 0;
}

.feature-card > * {
    position: relative;
    z-index: 1;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
}

.feature-icon img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

.feature-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.feature-desc {
    font-size: 0.75rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* AI Model Section */
.ai-model-section {
    padding-top: var(--spacing-2xl);
}

.ai-model-content {
    background-image: url('images/lulu-ai.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    min-height: 500px;
    padding: var(--spacing-2xl) 0;
    margin-top: var(--spacing-xl);
    display: flex;
    align-items: center;
}

.ai-image {
    display: none;
}

.ai-models {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 480px;
    margin-left: calc((100% - var(--max-width)) / 2 + var(--spacing-md));
    padding-left: var(--spacing-md);
}

@media (max-width: 1200px) {
    .ai-models {
        margin-left: var(--spacing-md);
    }
}

.ai-model-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: rgba(255, 255, 255, 0.95);
    padding: var(--spacing-lg) var(--spacing-xl);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
}

.model-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.model-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.model-info p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* Language Section */
.language-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.language-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.language-cloud-image {
    width: 100%;
    height: auto;
    display: block;
}

.lang-tag {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--color-white);
}

.lang-orange { background: #ff8c00; }
.lang-red { background: #ef4444; }
.lang-blue { background: #3b82f6; }
.lang-green { background: #22c55e; }
.lang-yellow { background: #eab308; color: var(--color-text); }
.lang-pink { background: #ec4899; }
.lang-purple { background: #8b5cf6; }
.lang-cyan { background: #06b6d4; }
.lang-teal { background: #14b8a6; }
.lang-lime { background: #84cc16; }
.lang-indigo { background: #6366f1; }
.lang-rose { background: #f43f5e; }
.lang-amber { background: #f59e0b; }
.lang-emerald { background: #10b981; }
.lang-center {
    background: var(--color-orange);
    font-weight: 700;
    font-size: 1.25rem;
    padding: 12px 24px;
}

/* Voice Section */
.voice-section {
    padding-top: var(--spacing-2xl);
}

.voice-demo {
    position: relative;
    width: 100%;
}

.voice-demo-bg {
    width: 100%;
    height: auto;
    display: block;
}

.voice-bubbles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.voice-bubble {
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 1rem;
    position: absolute;
    white-space: nowrap;
    color: #fff;
}

/* 用户消息 - 蓝色气泡带小三角 */
.voice-bubble.bubble-user {
    background-color: #4A90D9 !important;
    color: #ffffff !important;
}

.voice-bubble.bubble-user::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 20px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 10px 0 0;
    border-color: #4A90D9 transparent transparent transparent;
}

/* 机器人回复 - 橙色气泡带小三角 */
.voice-bubble.bubble-robot {
    background-color: #F5A623 !important;
    color: #ffffff !important;
}

.voice-bubble.bubble-robot::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 20px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 10px 0 0;
    border-color: #F5A623 transparent transparent transparent;
}

/* 气泡位置 - 按设计稿分散排列 */
.bubble-1 {
    top: 11%;
    left: 60%;
}

.bubble-2 {
    top: 21%;
    left: 60%;
}

.bubble-3 {
    top: 31%;
    left: 60%;
}

.bubble-4 {
    top: 42%;
    left: 5%;
}

.bubble-5 {
    top: 58%;
    left: 8%;
}

.bubble-6 {
    top: 75%;
    left: 12%;
}

.voice-image {
    display: none;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .voice-bubble {
        font-size: 0.875rem;
        padding: 10px 18px;
    }
}

@media (max-width: 768px) {
    .voice-bubble {
        font-size: 0.75rem;
        padding: 8px 14px;
        border-radius: 16px;
    }
    
    .bubble-1 {
        top: 3%;
        left: 5%;
    }
    
    .bubble-2 {
        top: 5%;
        right: 10%;
    }
    
    .bubble-3 {
        top: 18%;
        left: 10%;
    }
    
    .bubble-4 {
        top: 35%;
        left: 3%;
    }
    
    .bubble-5 {
        top: 50%;
        left: 5%;
    }
    
    .bubble-6 {
        top: 65%;
        left: 8%;
    }
}

/* ========================================
   XGO Page Styles
   ======================================== */
.hero-xgo {
    min-height: auto;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero-bg-dark {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-bg-text {
    font-size: 15vw;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.03);
    text-transform: uppercase;
}

.hero-image-full {
    position: relative;
    z-index: 1;
    width: 100%;
}

.hero-image-full img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Variants Section */
.variants-section {
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--color-white);
    overflow: hidden;
}

.variants-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.variant-card {
    padding: var(--spacing-xl) var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.variant-card .variant-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 3rem;
    background: linear-gradient(180deg, #d6e4f0 0%, #e8f0f6 100%);
    border-radius: 50%;
    width: 30vw;
    height: 30vw;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 15%;
}

.variant-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.variant-desc {
    font-size: 0.75rem;
    color: var(--color-text-light);
    line-height: 1.8;
    text-align: justify;
}
.variant-image {
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}
.variant-image img {
    max-width: 100%;
    width: 60%;
}

.variant-image-circle {
    position: relative;
    z-index: 3;
    margin-top: -10vw;
    display: flex;
    align-items: center;
    justify-content: center;
}

.variant-image-circle::before {
    display: none;
}

.variant-image-circle img {
    width: 100%;
    max-width: 30vw;
    object-fit: contain;
}

/* Feature Icons */
.feature-icons-section {
    padding: 0px 0;
    padding-bottom: 30px;
    background: #FFFFFF;
    display: flex;
    justify-content: center;
    overflow: hidden; /* Prevent 1300px line from causing horizontal scroll */
}

.feature-icons-grid {
    display: grid;
    grid-template-columns: repeat(5, 220px);
    grid-template-rows: repeat(2, 160px);
    position: relative;
    width: 1100px;
}

/* Vertical lines - 4 lines spanning both rows */
.feature-icons-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(to bottom, transparent 0%, rgba(166, 171, 178, 0.1) 5%, rgba(166, 171, 178, 0.35) 50%, rgba(166, 171, 178, 0.1) 95%, transparent 100%),
        linear-gradient(to bottom, transparent 0%, rgba(166, 171, 178, 0.1) 5%, rgba(166, 171, 178, 0.35) 50%, rgba(166, 171, 178, 0.1) 95%, transparent 100%),
        linear-gradient(to bottom, transparent 0%, rgba(166, 171, 178, 0.1) 5%, rgba(166, 171, 178, 0.35) 50%, rgba(166, 171, 178, 0.1) 95%, transparent 100%),
        linear-gradient(to bottom, transparent 0%, rgba(166, 171, 178, 0.1) 5%, rgba(166, 171, 178, 0.35) 50%, rgba(166, 171, 178, 0.1) 95%, transparent 100%);
    background-size: 1px 100%, 1px 100%, 1px 100%, 1px 100%;
    background-position: 220px 0, 440px 0, 660px 0, 880px 0;
    background-repeat: no-repeat;
    pointer-events: none;
    z-index: 10;
}

/* Horizontal line between rows */
.feature-icons-grid::after {
    content: '';
    position: absolute;
    top: 160px; /* Positioned exactly at the start of the second row */
    left: 50%;
    transform: translateX(-50%);
    width: 1300px;
    height: 1px;
    background: linear-gradient(to right, 
        transparent 0%, 
        rgba(165, 171, 178, 0.15) 15%,
        rgba(165, 171, 178, 0.4) 50%,
        rgba(165, 171, 178, 0.15) 85%,
        transparent 100%
    );
    pointer-events: none;
    z-index: 10;
}

.feature-icon-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: background 0.4s ease;
    z-index: 2;
    width: 220px;
    height: 160px;
}

/* 智能体卡片 (第3个) */
.feature-icon-item:nth-child(3).active {
    background: radial-gradient(ellipse at bottom , #E8EEF5 0%, #EFF3F7 50%, #FFFFFF 100%);
}

/* 自动循线 (第7个) 和 人机对话 (第9个) */
.feature-icon-item:nth-child(7).active,
.feature-icon-item:nth-child(9).active {
    background: radial-gradient(ellipse at top , #E0E8F2 0%, #EFF3F7 50%, #FFFFFF 100%);
}


.icon-circle {
    width: 60px;
    height: 60px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: none;
    box-shadow: none;
    border-radius: 0;
    position: relative;
    z-index: 10;
}

.icon-circle img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.feature-icon-item p {
    font-size: 16px;
    color: #333333;
    font-weight: 500;
    margin: 0;
    line-height: 1;
    position: relative;
    z-index: 10;
}

/* Product Features */
.product-features-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: linear-gradient(135deg, #0a1628 0%, #1a2744 50%, #0d1a30 100%);
    position: relative;
    overflow: hidden;
}

.product-features-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(37, 99, 235, 0.08) 0%, transparent 40%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0v60M0 30h60M10 10h10M40 10h10M10 40h10M40 40h10' stroke='rgba(37,99,235,0.1)' stroke-width='0.5' fill='none'/%3E%3Ccircle cx='30' cy='30' r='2' fill='rgba(37,99,235,0.15)'/%3E%3Ccircle cx='10' cy='10' r='1' fill='rgba(37,99,235,0.1)'/%3E%3Ccircle cx='50' cy='10' r='1' fill='rgba(37,99,235,0.1)'/%3E%3Ccircle cx='10' cy='50' r='1' fill='rgba(37,99,235,0.1)'/%3E%3Ccircle cx='50' cy='50' r='1' fill='rgba(37,99,235,0.1)'/%3E%3C/svg%3E");
    opacity: 0.6;
    pointer-events: none;
}

.product-features-section .section-title {
    color: var(--color-white);
    position: relative;
    z-index: 1;
}

.product-features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.product-feature-card {
    text-align: center;
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    flex-direction: column;
}

.pf-icon {
    width: 36px;
    height: 36px;
    margin-bottom: var(--spacing-sm);
}

.pf-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-feature-card h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.product-feature-card p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.7;
}

/* Bionic Section */
.bionic-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-gray-50);
}

.bionic-section .section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.bionic-section .section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.bionic-section .section-desc {
    font-size: 0.875rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Bionic Carousel */
.bionic-carousel {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-lg) 0;
}

.carousel-track {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: grab;
    user-select: none;
    transition: transform 0.4s ease;
}

.carousel-track:active {
    cursor: grabbing;
}

.carousel-slide {
    flex: 0 0 calc(33.333% - var(--spacing-md));
    min-width: calc(33.333% - var(--spacing-md));
    text-align: center;
    transition: all 0.4s ease;
    opacity: 0.7;
    transform: scale(0.95);
    cursor: pointer;
}

.carousel-slide.active {
    opacity: 1;
    transform: scale(1);
    cursor: default;
}

.carousel-slide img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
}

.carousel-slide p {
    font-size: 0.9375rem;
    color: var(--color-text);
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.carousel-slide.active p {
    opacity: 1;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: var(--spacing-lg);
}

.carousel-dot {
    width: 32px;
    height: 4px;
    border-radius: 2px;
    background: var(--color-gray-300);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot:hover {
    background: var(--color-gray-400);
}

.carousel-dot.active {
    background: var(--color-text);
    width: 48px;
}

/* Structure Section */
.structure-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--color-white);
}

.structure-diagram {
    position: relative;
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.structure-diagram > img {
    width: 100%;
    display: block;
}

.structure-labels {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.structure-labels .label {
    position: absolute;
    font-size: 0.8125rem;
    color: var(--color-text);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.structure-labels .label::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

/* Label positions - adjusted for design */
.structure-labels .label-1 { top: 8%; right: 10%; }
.structure-labels .label-2 { top: 18%; right: 8%; }
.structure-labels .label-3 { top: 28%; left: 8%; }
.structure-labels .label-4 { top: 32%; right: 10%; }
.structure-labels .label-5 { top: 42%; left: 8%; }
.structure-labels .label-6 { top: 48%; right: 10%; }
.structure-labels .label-7 { top: 62%; right: 10%; }
.structure-labels .label-8 { top: 72%; left: 8%; }
.structure-labels .label-9 { top: 82%; right: 10%; }
.structure-labels .label-10 { top: 88%; left: 8%; }

/* ========================================
   Footer (旧版 - 保留兼容)
   ======================================== */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-md);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-company {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Footer New - 宇树风格底部
   ======================================== */
.footer-new {
    background: linear-gradient(135deg, #1a2744 0%, #0d1a30 50%, #0a1628 100%);
    color: var(--color-white);
}

.footer-container-new {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 5%;
}

/* 底部主体 - 链接区域 */
.footer-main {
    padding: 60px 0 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-main .footer-container-new {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 40px;
}

.footer-column {
    min-width: 0;
}

.footer-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--color-white);
}

/* 联系信息样式 */
.footer-contact li {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}

.footer-contact .contact-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-contact span:last-child {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 联系我们二维码 */
.footer-contact-qrcode {
    margin-top: 16px;
    text-align: left;
}

.footer-contact-qrcode img {
    width: 100px;
    height: 100px;
    border-radius: 6px;
    background: #fff;
    padding: 4px;
}

.footer-contact-qrcode span {
    display: block;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

/* 底部导航栏 */
.footer-bottom {
    padding: 24px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom .footer-container-new {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
}

.footer-logo-img {
    height: 32px;
    width: auto;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.footer-nav {
    display: flex;
    gap: 24px;
}

.footer-nav a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.footer-nav a:hover {
    color: var(--color-white);
}

/* 社交媒体图标 */
.footer-social {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.15);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

/* 社交媒体二维码悬浮显示 */
.social-link-hover {
    position: relative;
}

.social-qrcode {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-white);
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin-bottom: 12px;
    z-index: 100;
    text-align: center;
}

.social-qrcode::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--color-white);
}

.social-link-hover:hover .social-qrcode {
    opacity: 1;
    visibility: visible;
}

.social-qrcode img {
    width: 300px;
    height: auto;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    display: block;
    border-radius: 4px;
}

.social-qrcode span {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text);
    margin-top: 8px;
    white-space: nowrap;
}

/* 版权信息 */
.footer-copyright {
    padding: 20px 0;
}

.footer-copyright p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    margin: 0;
}

.footer-copyright a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
}

.footer-copyright a:hover {
    color: rgba(255, 255, 255, 0.9);
}

/* 桌面端隐藏换行 */
.copyright-break {
    display: none;
}

/* 底部响应式 */
@media (max-width: 1024px) {
    .footer-main .footer-container-new {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .footer-main {
        padding: 40px 0 30px;
    }
    
    .footer-main .footer-container-new {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-contact-qrcode {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin: 16px auto 0;
    }
    
    .footer-contact li {
        align-items: center;
    }
    
    .footer-bottom .footer-container-new {
        flex-direction: column;
        gap: 20px;
    }
    
    .footer-bottom-left {
        flex-direction: column;
        gap: 20px;
    }
    
    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer-bottom,
    .footer-copyright {
        display: block !important;
        visibility: visible !important;
    }
    
    .footer-copyright p {
        color: rgba(255, 255, 255, 0.6);
    }
    
    /* 移动端版权信息换行 */
    .copyright-divider {
        display: none;
    }
    
    .copyright-break {
        display: block;
    }
    
    /* 移动端社交按钮间距调整 */
    .footer-social {
        gap: 24px;
    }
    
    .social-link {
        width: 44px;
        height: 44px;
    }
    
    .social-link svg {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 480px) {
    .footer-main .footer-container-new {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-contact-qrcode {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin: 16px auto 0;
    }
    
    .footer-contact li {
        align-items: center;
    }
    
    .footer-nav {
        gap: 16px;
    }
    
    .footer-nav a {
        font-size: 0.75rem;
    }
    
    .footer-bottom,
    .footer-copyright {
        display: block !important;
        visibility: visible !important;
    }
    
    .footer-copyright {
        padding: 16px 0 !important;
    }
    
    .footer-copyright p {
        font-size: 0.6875rem !important;
        line-height: 1.6;
        color: rgba(255, 255, 255, 0.6) !important;
    }
    
    .footer-copyright a {
        color: rgba(255, 255, 255, 0.7);
        text-decoration: underline;
    }
    
    /* 移动端版权信息换行 */
    .copyright-divider {
        display: none;
    }
    
    .copyright-break {
        display: block;
    }
    
    /* 小屏幕社交按钮间距进一步调整 */
    .footer-social {
        gap: 32px;
    }
    
    .social-link {
        width: 48px;
        height: 48px;
    }
    
    .social-link svg {
        width: 22px;
        height: 22px;
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero-home {
        flex-direction: column;
        text-align: center;
        padding-top: calc(var(--header-height) + var(--spacing-lg));
    }

    .hero-container {
        flex-direction: column;
        padding: var(--spacing-lg);
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-image {
        padding-left: 0;
        justify-content: center;
        margin-top: var(--spacing-lg);
    }

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

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

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

    .feature-icons-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: var(--spacing-md);
    }

    .icon-circle {
        width: 60px;
        height: 60px;
    }

    .icon-circle img {
        width: 32px;
        height: 32px;
    }

    .home-hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .home-hero-content {
        align-items: center;
    }

    .home-hero-subtitle {
        max-width: 560px;
    }

    .home-hero-visual {
        min-height: 320px;
        justify-content: center;
    }

    .hero-robot--large {
        width: 360px;
        right: auto;
    }

    .hero-robot--small {
        left: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
    }
    
    /* 移动端防止水平滚动和白边 */
    html, body {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
        position: relative;
    }
    
    * {
        max-width: 100%;
    }
    
    main, section, .container {
        overflow-x: hidden;
    }

    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-white);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-lg);
        z-index: 998;
    }

    .nav.nav-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
    }

    .nav-link {
        display: block;
        padding: var(--spacing-sm);
        color: var(--color-text) !important;
    }
    
    /* 移动端隐藏桌面端的下拉菜单 */
    .has-dropdown .dropdown {
        display: none !important;
    }

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

    .logo-image {
        height: 28px;
    }
    
    /* 移动端产品菜单 */
    .mobile-robots-menu {
        display: block;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-white);
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: 999;
        overflow-y: auto;
    }
    
    .mobile-robots-menu.mobile-robots-open {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-robots-header {
        display: flex;
        align-items: center;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-gray-200);
        position: sticky;
        top: 0;
        background: var(--color-white);
        z-index: 10;
    }
    
    .mobile-robots-back {
        background: none;
        border: none;
        padding: 8px;
        margin-right: var(--spacing-sm);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-text);
        transition: color var(--transition-fast);
    }
    
    .mobile-robots-back:active {
        color: var(--color-primary);
    }
    
    .mobile-robots-title {
        font-size: 1.125rem;
        font-weight: 600;
        color: var(--color-text);
    }
    
    .mobile-robots-content {
        padding: var(--spacing-md);
    }
    
    .mobile-robots-content .mega-series {
        margin-bottom: var(--spacing-lg);
    }
    
    .mobile-robots-content .mega-series-title {
        font-size: 0.875rem;
        color: var(--color-text-muted);
        margin-bottom: var(--spacing-sm);
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    
    .mobile-robots-content .mega-series-items {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .mobile-robots-content .mega-card-v2 {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-sm);
        background: var(--color-gray-50);
        border-radius: var(--border-radius);
        transition: all var(--transition-fast);
    }
    
    .mobile-robots-content .mega-card-v2:active {
        background: var(--color-gray-100);
        transform: scale(0.98);
    }
    
    .mobile-robots-content .mega-card-media-v2 {
        width: 100%;
        aspect-ratio: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: var(--spacing-xs);
    }
    
    .mobile-robots-content .mega-card-media-v2 img {
        width: 100%;
        height: 100%;
        object-fit: contain;
    }
    
    .mobile-robots-content .mega-card-name-v2 {
        font-size: 0.875rem;
        color: var(--color-text);
        text-align: center;
        line-height: 1.3;
    }

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

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

    .competition-images {
        grid-template-columns: 1fr;
    }

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

    .about-content {
        flex-direction: column;
    }

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

    .market-item {
        flex-direction: column;
        text-align: center;
    }

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

    /* Lulu Hero 响应式样式 */
    .hero-lulu .hero-content {
        position: static;
        transform: none;
        max-width: 100%;
        padding: var(--spacing-lg);
        text-align: center;
        align-items: center;
    }
    
    .hero-product-name {
        font-size: 1.25rem;
    }
    
    .hero-lulu .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-tag {
        padding: 6px 20px;
        font-size: 0.875rem;
    }
    
    .hero-features {
        justify-content: center;
        font-size: 0.8125rem;
    }

    .ai-model-content {
        flex-direction: column;
    }

    .voice-demo {
        flex-direction: column;
    }

    .variants-grid {
        grid-template-columns: 1fr;
    }
    
    .variant-card .variant-content {
        width: 300px;
        height: 300px;
        padding: var(--spacing-md);
    }
    
    .variant-image-circle {
        margin-top: -60px;
    }
    
    .variant-image-circle img {
        max-width: 280px;
    }

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

    .feature-icons-section {
        padding: 30px 0;
    }

    .feature-icons-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
        width: 100%;
        max-width: 100%;
        gap: 16px;
        padding: 0 16px;
    }

    .feature-icons-grid::before {
        display: none;
    }

    .feature-icons-grid::after {
        display: none;
    }

    .feature-icon-item {
        width: 100%;
        height: auto;
        min-height: 140px;
        padding: 24px 16px;
        position: relative;
        background: linear-gradient(135deg, #f8f9fb 0%, #ffffff 100%);
        border-radius: 12px;
        border: 1px solid rgba(165, 171, 178, 0.15);
        transition: all 0.3s ease;
    }
    
    .feature-icon-item:active {
        transform: scale(0.98);
        background: linear-gradient(135deg, #f0f3f7 0%, #f8f9fb 100%);
    }

    /* 移除伪元素线条 */
    .feature-icon-item::after,
    .feature-icon-item::before {
        display: none;
    }

    /* 移除active状态的特殊背景（移动端与其他卡片保持一致） */
    .feature-icon-item.active,
    .feature-icon-item:nth-child(3).active,
    .feature-icon-item:nth-child(7).active,
    .feature-icon-item:nth-child(9).active {
        background: linear-gradient(135deg, #f8f9fb 0%, #ffffff 100%);
        border: 1px solid rgba(165, 171, 178, 0.15);
    }

    .icon-circle {
        width: 64px;
        height: 64px;
        margin-bottom: 16px;
    }

    .icon-circle img {
        width: 48px;
        height: 48px;
    }

    .feature-icon-item p {
        font-size: 15px;
        line-height: 1.4;
    }


    .bionic-carousel {
        padding: var(--spacing-md) 0;
    }

    .carousel-track {
        gap: var(--spacing-sm);
    }

    .carousel-slide {
        flex: 0 0 55%;
        min-width: 55%;
        opacity: 0.6;
    }

    .carousel-slide.active {
        opacity: 1;
    }

    .carousel-slide p {
        font-size: 0.875rem;
    }

    .structure-labels .label {
        font-size: 0.6875rem;
    }

    .hero-banner {
        flex-direction: column;
        text-align: center;
        padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
        min-height: auto;
    }

    .hero-banner-content {
        display: none;
    }

    .hero-banner-image {
        padding-top: var(--header-height);
    }

    .hero-banner-image img {
        max-width: 100%;
    }

    .home-hero {
        min-height: auto;
    }

    .home-hero-inner {
        display: none;
    }

    .home-hero-visual {
        min-height: 260px;
    }

    .hero-platform--right {
        width: 280px;
        height: 140px;
        right: 10px;
    }

    .hero-robot--large {
        width: 300px;
        bottom: 60px;
    }

    .hero-robot--small {
        width: 150px;
        bottom: 30px;
    }

    .home-products-grid,
    .home-gallery-grid,
    .home-competition-grid {
        grid-template-columns: 1fr;
    }

    .home-competition-side {
        grid-template-rows: none;
    }

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

@media (max-width: 480px) {
    /* 小屏幕防止水平滚动和白边 */
    html, body {
        overflow-x: hidden !important;
        width: 100%;
        max-width: 100vw;
    }
    
    main, section, .container {
        overflow-x: hidden;
        width: 100%;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }

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

    .language-cloud {
        gap: var(--spacing-xs);
    }

    .lang-tag {
        padding: 6px 14px;
        font-size: 0.75rem;
    }

    .feature-icons-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

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

    .carousel-slide {
        flex: 0 0 65%;
        min-width: 65%;
    }

    .structure-labels {
        display: none;
    }
}