/* ===== 全局变量 ===== */
:root {
    /* 品牌色系 - 商务深蓝 + 科技蓝 + 克制点缀 */
    --primary: #0A2E6E;
    --primary-dark: #061E47;
    --primary-light: #2E5BB8;
    --accent: #0055AA;
    --accent-glow: rgba(0, 85, 170, 0.15);
    --ai-blue: #1E6FE0;
    --ai-purple: #5B7CFA;

    /* 中性色 - 白底商务 */
    --bg-dark: #FFFFFF;
    --bg-darker: #F4F7FB;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F4F7FB;
    --text-primary: #0F1B2D;
    --text-secondary: rgba(15, 27, 45, 0.72);
    --text-muted: rgba(15, 27, 45, 0.5);
    --border: rgba(15, 27, 45, 0.1);
    --border-glow: rgba(10, 46, 110, 0.18);

    /* 间距系统 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

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

body {
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 科技感字体用于标题 */
h1, h2, h3, h4, h5, h6 {
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background: rgba(244, 247, 251, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(244, 247, 251, 0.95);
    padding: 0.5rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    filter: brightness(1.1);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-svg {
    width: 100%;
    height: 100%;
    color: var(--accent);
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-cn {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-en {
    font-size: 0.7rem;
    color: var(--accent);
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    transition: width var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.lang-switch {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    transition: all var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(244, 247, 251, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--spacing-lg);
    z-index: 999;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.mobile-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.1rem;
    padding: var(--spacing-sm) 0;
    display: block;
    transition: color var(--transition-fast);
}

.mobile-menu a:hover {
    color: var(--accent);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px var(--spacing-md) var(--spacing-xxl);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

#particleCanvas {
    position: absolute;
    inset: 0;
    opacity: 0.6;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 102, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.1), rgba(0, 102, 255, 0.1));
    border: 1px solid rgba(0, 212, 170, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease 0.2s both;
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    font-size: clamp(1.6rem, 3.6vw, 2.8rem);
    line-height: 1.25;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    animation: fadeInUp 1s ease 0.3s both;
    white-space: nowrap;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.title-divider {
    display: block;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    margin: var(--spacing-sm) auto;
    max-width: 400px;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-subtitle {
    display: block;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 400;
    opacity: 0.9;
    margin-top: var(--spacing-sm);
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    animation: fadeInUp 1s ease 0.5s both;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xxl);
    animation: fadeInUp 1s ease 0.6s both;
}

.btn {
    padding: 0.9rem 2rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(10, 46, 110, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 102, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0, 212, 170, 0.1);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xxl);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.7s both;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    color: var(--accent);
    margin-bottom: 0.3rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* ===== Section 通用样式 ===== */
.section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--text-primary);
}

/* ===== 关于我们 ===== */
.about {
    background: linear-gradient(180deg, var(--bg-darker), var(--bg-dark));
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.about-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
}

.feature-item:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateX(10px);
}

.feature-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
    color: var(--accent);
}

.feature-text h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.feature-text p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0 !important;
}

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

.chip-visual {
    position: relative;
    width: 300px;
    height: 300px;
}

.chip-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    box-shadow: 
        0 0 30px var(--accent-glow),
        inset 0 0 20px rgba(15, 27, 45, 0.1);
    animation: chipPulse 3s ease infinite;
}

@keyframes chipPulse {
    0%, 100% { box-shadow: 0 0 30px var(--accent-glow), inset 0 0 20px rgba(15, 27, 45, 0.1); }
    50% { box-shadow: 0 0 50px var(--accent-glow), inset 0 0 30px rgba(15, 27, 45, 0.2); }
}

.chip-rings {
    position: absolute;
    inset: 0;
}

.ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid;
    animation: ringRotate 10s linear infinite;
}

.ring-1 {
    width: 150px;
    height: 150px;
    border-color: rgba(0, 102, 255, 0.3);
}

.ring-2 {
    width: 220px;
    height: 220px;
    border-color: rgba(0, 191, 255, 0.2);
    animation-direction: reverse;
}

.ring-3 {
    width: 290px;
    height: 290px;
    border-color: rgba(0, 212, 170, 0.15);
}

@keyframes ringRotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.chip-pins {
    position: absolute;
    inset: 0;
}

.chip-pins span {
    position: absolute;
    width: 3px;
    height: 20px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

.chip-pins span:nth-child(1) { top: 60px; left: 50%; transform: translateX(-50%); }
.chip-pins span:nth-child(2) { bottom: 60px; left: 50%; transform: translateX(-50%); }
.chip-pins span:nth-child(3) { top: 50%; left: 60px; transform: translateY(-50%) rotate(90deg); }
.chip-pins span:nth-child(4) { top: 50%; right: 60px; transform: translateY(-50%) rotate(90deg); }
.chip-pins span:nth-child(5) { top: 80px; left: 80px; transform: rotate(45deg); }
.chip-pins span:nth-child(6) { top: 80px; right: 80px; transform: rotate(-45deg); }
.chip-pins span:nth-child(7) { bottom: 80px; left: 80px; transform: rotate(-45deg); }
.chip-pins span:nth-child(8) { bottom: 80px; right: 80px; transform: rotate(45deg); }

/* ===== 产品与服务 ===== */
.products {
    background: var(--bg-dark);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
}

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

.product-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.product-card:hover::before {
    opacity: 1;
}

.product-card.featured {
    border-color: rgba(0, 212, 170, 0.3);
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.05), var(--bg-card));
}

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent), var(--ai-blue));
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
}

.product-icon svg {
    width: 100%;
    height: 100%;
    color: var(--accent);
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.product-card > p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.product-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.product-features li {
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.2);
    padding: 0.4rem 0.8rem;
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--accent);
}

/* ===== 产品卡片跳转徽章 (右上角小标签) ===== */
.card-link-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.15), rgba(0, 212, 255, 0.15));
    border: 1px solid rgba(0, 212, 255, 0.4);
    border-radius: 50px;
    font-size: 0.78rem;
    color: var(--ai-blue);
    backdrop-filter: blur(10px);
    z-index: 2;
    transition: all var(--transition-fast);
}

.card-link-badge svg {
    width: 14px !important;
    height: 14px !important;
    color: var(--ai-blue);
    stroke-width: 2.5;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.clickable-card:hover .card-link-badge {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.25), rgba(0, 212, 255, 0.25));
    border-color: var(--ai-blue);
}

.clickable-card:hover .card-link-badge svg {
    transform: translateX(3px);
}

/* ===== 技术优势 ===== */
.advantages {
    background: linear-gradient(180deg, var(--bg-dark), var(--bg-darker));
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
    .advantages-grid { grid-template-columns: 1fr; }
}

.advantage-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.advantage-item:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.advantage-number {
    font-size: 3rem;
    font-weight: 700;
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.advantage-item h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.advantage-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== 全球布局 ===== */
.global {
    background: var(--bg-darker);
    position: relative;
    overflow: hidden;
}

.global::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 102, 255, 0.05), transparent);
}

.global-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.global-map {
    display: flex;
    justify-content: center;
    align-items: center;
}

.map-visual {
    position: relative;
    width: 400px;
    height: 300px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 170, 0.05));
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    overflow: hidden;
}

.map-dot {
    position: absolute;
    width: 16px;
    height: 16px;
}

.dot-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--accent);
    border-radius: 50%;
    animation: dotPulse 2s infinite;
}

@keyframes dotPulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(3); opacity: 0; }
}

.dot-label {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.map-dot:hover .dot-label,
.map-dot.active .dot-label {
    opacity: 1;
}

.dot-china { top: 40%; left: 75%; }
.dot-usa { top: 35%; left: 15%; }
.dot-europe { top: 30%; left: 50%; }
.dot-asia { top: 55%; left: 85%; }

.region-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.region-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.region-item:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.region-icon {
    font-size: 2rem;
}

.region-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.region-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ===== 联系我们 ===== */
.contact {
    background: linear-gradient(180deg, var(--bg-darker), var(--bg-dark));
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
}

.company-names {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.company-name h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.company-en {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.contact-item:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.contact-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
    color: var(--accent);
}

.contact-text .label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.2rem;
}

.contact-text a {
    font-size: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-text a:hover {
    color: var(--accent);
}

.addresses {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.address-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.address-card:hover {
    border-color: var(--accent);
}

.address-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.address-flag {
    font-size: 1.5rem;
}

.address-header h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.address-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-darker);
    padding: var(--spacing-xxl) 0 var(--spacing-xxl);
    border-top: 1px solid var(--border);
    position: relative;
}
.footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent) 20%, var(--primary) 50%, var(--accent) 80%, transparent);
    opacity: 0.6;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 6rem;
    margin-bottom: var(--spacing-xxl);
    align-items: flex-start;
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}
.footer-brand .logo-icon svg {
    width: 56px;
    height: 56px;
}
.footer-brand .logo-text {
    font-size: 1.3rem;
}
.footer-brand p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-top: var(--spacing-md);
    line-height: 1.6;
    letter-spacing: 0.5px;
}

.footer-links {
    display: flex;
    gap: 4rem;
    justify-content: flex-start;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 140px;
}

.footer-column h5 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 8px;
}
.footer-column h5::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    border-radius: 1px;
}

.footer-column a {
    font-size: 0.95rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-qr {
    align-self: flex-start;
}
.footer-qr-img {
    width: 110px;
    height: 110px;
    background: white;
    padding: 8px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--spacing-sm);
}
.footer-qr-img img {
    width: 100%;
    height: 100%;
    display: block;
}
.footer-qr-tip {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.4;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border);
    margin-top: var(--spacing-md);
}

.footer-bottom p {
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* ===== 响应式设计 ===== */
/* 移动端：保持桌面风格，不改变布局 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

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

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 212, 170, 0.4);
}

.back-to-top:active {
    transform: translateY(-2px);
}

/* 移动端：保持桌面风格 */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* ===== 动画 ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 子页面通用样式 ===== */
.page-hero {
    position: relative;
    padding: 180px 0 100px;
    background: linear-gradient(135deg, #F4F7FB 0%, #E8F0FE 50%, #F4F7FB 100%);
    overflow: hidden;
    text-align: center;
}

.page-hero .hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.4;
}

.page-hero .hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-lg);
    padding: 0.4rem 1.2rem;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.3);
    border-radius: 20px;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--accent);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    color: var(--text-muted);
}

.breadcrumb .current {
    color: var(--text-primary);
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-md) 0;
    color: var(--text-primary);
}

.page-subtitle {
    font-size: 1.3rem;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.page-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

.content-section {
    padding: var(--spacing-xxl) 0;
}

.content-section.alt-bg {
    background: rgba(0, 0, 0, 0.2);
}

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

.section-header h2 {
    font-size: 2.2rem;
    color: var(--text-primary);
    margin: var(--spacing-sm) 0;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.content-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.content-grid.two-col {
    grid-template-columns: 1.5fr 1fr;
    align-items: center;
}

.content-text h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin: var(--spacing-sm) 0 var(--spacing-md);
}

.content-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

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

.stat-box {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-box:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.stat-num {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.business-card {
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.business-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 212, 170, 0.15);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.1) 0%, rgba(0, 102, 255, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.card-icon svg {
    width: 50px;
    height: 50px;
}

.business-card h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.business-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.advantages-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.advantage-card {
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.advantage-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

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

.advantage-num {
    display: inline-block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    margin-bottom: var(--spacing-sm);
    opacity: 0.6;
}

.advantage-card h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.advantage-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.process-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 150px;
    text-align: center;
    padding: var(--spacing-md);
}

.step-num {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.process-step h4 {
    color: var(--text-primary);
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.process-step p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
}

.process-arrow {
    color: var(--accent);
    font-size: 1.5rem;
    opacity: 0.6;
}

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

.region-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    text-align: center;
}

.region-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 212, 170, 0.15);
}

.region-flag {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.region-card h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.region-name {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.region-addr {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.region-tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.3);
    border-radius: 12px;
    color: var(--accent);
    font-size: 0.8rem;
}

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

.hq-card {
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.hq-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.hq-flag {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.hq-card h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.hq-detail p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.hq-detail strong {
    color: var(--accent);
}

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

.contact-card {
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.contact-card.primary {
    border-color: var(--accent);
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.05) 0%, rgba(0, 102, 255, 0.05) 100%);
    transform: scale(1.02);
}

.contact-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 212, 170, 0.2);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-name {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.contact-link {
    display: block;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    margin-bottom: 0.5rem;
    word-break: break-all;
}

.contact-link:hover {
    color: var(--accent);
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

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

.coop-step {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.coop-step:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.coop-num {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    font-family: "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "SimHei", "WenQuanYi Micro Hei", sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.coop-step h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.coop-step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 企业微信客服二维码 */
.wechat-qr-card {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--accent);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.06) 0%, rgba(0, 102, 255, 0.06) 100%);
    box-shadow: 0 15px 40px rgba(0, 212, 170, 0.15);
}

.wechat-qr-img {
    flex: 0 0 auto;
    width: 200px;
    height: 200px;
    padding: 12px;
    background: #ffffff;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

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

.wechat-qr-info {
    flex: 1;
}

.wechat-qr-info h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
}

.wechat-qr-tip {
    color: var(--accent);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.wechat-qr-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 0.8rem;
}

.wechat-qr-note {
    color: var(--text-secondary);
    font-size: 0.82rem;
    opacity: 0.8;
    line-height: 1.5;
}

@media (max-width: 600px) {
    .wechat-qr-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .wechat-qr-img {
        width: 180px;
        height: 180px;
    }
}

/* ===== 联系 CTA 重设计版（首页/关于/产品/优势/全球等全站统一） ===== */
.contact-cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.06), rgba(0, 212, 255, 0.06));
    position: relative;
    overflow: hidden;
}

.contact-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 50%, rgba(0, 212, 255, 0.08), transparent 60%);
    pointer-events: none;
}

.cta-card {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    background: rgba(244, 247, 251, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.18);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) var(--spacing-xxl);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.12);
    position: relative;
    z-index: 1;
}

.cta-info h2 {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.cta-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
    line-height: 1.6;
}

.cta-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.cta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.cta-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--ai-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.cta-text strong {
    display: block;
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.cta-text a,
.cta-text span {
    color: var(--ai-blue);
    font-size: 0.95rem;
    text-decoration: none;
    transition: color 0.3s;
}

.cta-text a:hover {
    color: var(--accent);
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.9rem 2rem;
    font-size: 1rem;
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.35);
}

.cta-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(15, 27, 45, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 212, 255, 0.15);
}

.qr-frame {
    position: relative;
    padding: 12px;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.2);
}

.qr-frame img {
    display: block;
    width: 200px;
    height: 200px;
    border-radius: 4px;
}

.qr-frame::before {
    content: '';
    position: absolute;
    inset: -3px;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--ai-blue), var(--accent)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

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

.qr-label strong {
    display: block;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 4px;
}

.qr-label span {
    color: var(--ai-blue);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .cta-card {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }
    .cta-qr {
        order: -1;
    }
    .qr-frame img {
        width: 160px;
        height: 160px;
    }
}

/* ============================================

/* ============================================
   全站移动端适配 - 断点体系
   ============================================ */

/* 平板及以下：768px */
@media (max-width: 768px) {
    /* === 通用 === */
    :root {
        --spacing-xl: 1.5rem;
        --spacing-xxl: 2rem;
    }
    .container {
        padding: 0 16px;
    }
    .section {
        padding: 50px 0;
    }
    .section-header {
        margin-bottom: 32px;
    }
    .section-title {
        font-size: 1.6rem !important;
    }
    .section-tag {
        font-size: 0.7rem;
    }

    /* === 导航栏 === */
    .nav-container {
        padding: 0 16px;
    }
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
        width: 36px;
        height: 36px;
        align-items: center;
        justify-content: center;
    }
    .mobile-menu-btn span {
        width: 22px;
        height: 2px;
        background: var(--text-primary);
        transition: all 0.3s;
        display: block;
    }
    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }
    .mobile-menu {
        display: block;
        top: 60px;
    }
    .mobile-menu a {
        font-size: 1.05rem;
        padding: 12px 0;
        border-bottom: 1px solid rgba(15, 27, 45, 0.05);
    }
    .logo-cn {
        font-size: 1rem;
    }
    .logo-en {
        font-size: 0.65rem;
    }
    .lang-switch {
        font-size: 0.7rem;
        padding: 0.3rem 0.6rem;
    }

    /* === Hero === */
    .hero {
        min-height: 90vh;
        padding: 80px 16px 40px;
    }
    .hero-title {
        font-size: clamp(1.4rem, 4.5vw, 2rem) !important;
        white-space: normal !important;
        line-height: 1.3 !important;
    }
    .hero-subtitle {
        font-size: 0.95rem !important;
    }
    .hero-desc {
        font-size: 0.85rem !important;
    }
    .hero-buttons {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }
    .hero-buttons .btn {
        width: 100%;
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    .hero-stats {
        gap: 12px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .stat-item {
        min-width: 80px;
    }
    .stat-number {
        font-size: 1.5rem !important;
    }
    .stat-label {
        font-size: 0.75rem !important;
    }
    .breadcrumb {
        font-size: 0.8rem;
    }

    /* === 通用页面头部 === */
    .page-hero {
        padding: 100px 16px 40px;
        min-height: 280px;
    }
    .page-title {
        font-size: 1.8rem !important;
    }
    .page-subtitle {
        font-size: 0.9rem;
    }
    .page-desc {
        font-size: 0.85rem;
    }

    /* === About 区块 === */
    .about-content {
        grid-template-columns: 1fr !important;
        gap: 24px;
    }
    .about-image, .map-visual {
        width: 100% !important;
        max-width: 360px;
        margin: 0 auto;
    }
    .feature-grid {
        grid-template-columns: 1fr !important;
        gap: 16px;
    }

    /* === Products 产品卡片 === */
    .products-grid {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }
    .product-card {
        padding: 24px 20px;
    }
    .product-icon {
        width: 60px !important;
        height: 60px !important;
    }
    .product-icon svg {
        width: 50px !important;
        height: 50px !important;
    }
    .product-card h3 {
        font-size: 1.15rem;
    }
    .product-features {
        font-size: 0.85rem;
    }
    .card-link-badge {
        font-size: 0.7rem !important;
        padding: 0.3rem 0.6rem !important;
    }
    .card-link-badge svg {
        width: 12px !important;
        height: 12px !important;
    }

    /* === Advantages 优势 === */
    .advantages-grid {
        grid-template-columns: 1fr !important;
        gap: 16px;
    }
    .advantages-cards-grid {
        grid-template-columns: 1fr !important;
        gap: 16px;
    }
    .advantage-item, .advantage-card {
        padding: 20px 18px;
        text-align: left !important;
    }
    .advantage-number {
        font-size: 2.2rem;
    }

    /* === Global 全球布局 === */
    .global-content {
        grid-template-columns: 1fr !important;
        gap: 24px;
    }
    .map-visual {
        height: 240px !important;
    }
    .region-item {
        padding: 12px;
    }

    /* === Contact 联系区块 === */
    .contact-layout {
        grid-template-columns: 1fr !important;
        gap: 24px;
    }
    .contact-content {
        grid-template-columns: 1fr !important;
        gap: 24px;
    }
    .contact-manager-card {
        padding: 16px !important;
    }
    .manager-avatar svg {
        width: 64px !important;
        height: 64px !important;
    }
    .manager-name {
        font-size: 1.25rem !important;
    }
    .office-card {
        padding: 16px 18px !important;
    }
    .office-flag {
        font-size: 1.6rem !important;
    }
    .contact-info-item {
        padding: 12px 14px !important;
    }
    .contact-info-icon {
        font-size: 1.2rem !important;
    }
    .contact-info-value {
        font-size: 0.95rem !important;
    }
    .contact-website-btn {
        width: 100%;
        padding: 14px 20px;
    }

    /* === contact.html 6宫格 === */
    .contact-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 12px;
    }
    .contact-card {
        padding: 16px 12px !important;
    }
    .contact-card h3 {
        font-size: 0.9rem;
    }
    .contact-name, .contact-link {
        font-size: 0.85rem;
    }
    .contact-desc {
        font-size: 0.7rem;
    }
    .contact-icon {
        font-size: 1.5rem !important;
    }
    .wechat-qr-card {
        flex-direction: column !important;
        text-align: center;
        gap: 20px;
        padding: 20px;
    }
    .wechat-qr-img {
        margin: 0 auto;
    }
    .wechat-qr-img img {
        width: 180px !important;
        height: 180px !important;
    }
    .qr-contact-items {
        justify-content: center;
        gap: 12px !important;
    }
    .qr-contact-item {
        padding: 6px 10px !important;
    }
    .cooperation-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 12px;
    }
    .coop-step {
        padding: 16px 14px;
    }
    .coop-num {
        font-size: 1.5rem !important;
    }
    .coop-step h4 {
        font-size: 0.9rem;
    }
    .coop-step p {
        font-size: 0.75rem;
    }

    /* === 产品目录页 / 品牌页 === */
    .brand-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 12px !important;
    }
    .brand-card {
        padding: 16px 12px !important;
    }
    .brand-card .brand-name {
        font-size: 0.95rem !important;
    }
    .catalog-search {
        max-width: 100% !important;
    }
    .catalog-search input {
        font-size: 0.9rem;
        padding: 10px 14px !important;
    }
    .category-section {
        padding: 20px 16px !important;
    }
    .category-title {
        font-size: 1.1rem !important;
    }
    .model-list {
        grid-template-columns: 1fr !important;
        gap: 8px;
    }
    .model-item {
        padding: 8px 12px;
        font-size: 0.8rem;
    }

    /* === Footer === */
    .footer {
        padding: 40px 0 20px;
    }
    .footer-content {
        grid-template-columns: 1fr !important;
        gap: 32px !important;
        text-align: center;
    }
    .footer-brand .logo {
        justify-content: center;
    }
    .footer-links {
        flex-direction: column;
        gap: 24px !important;
        align-items: center;
    }
    .footer-column {
        align-items: center;
    }
    .footer-qr {
        margin: 0 auto;
    }
    .footer-qr-img {
        width: 100px !important;
        height: 100px !important;
    }

    /* === Back to top === */
    .back-to-top {
        width: 44px !important;
        height: 44px !important;
        bottom: 20px !important;
        right: 20px !important;
    }

    /* === contact-cta 全站联系 CTA === */
    .contact-cta, .cta-card {
        grid-template-columns: 1fr !important;
        padding: 20px 16px !important;
        gap: 20px !important;
    }
    .cta-content {
        text-align: center;
    }
    .cta-info {
        flex-direction: column;
        gap: 12px;
    }
    .cta-qr {
        order: -1;
        margin: 0 auto;
    }
    .qr-frame img {
        width: 140px !important;
        height: 140px !important;
    }
    .cta-btn {
        width: 100%;
    }

    /* === 安全区适配 iPhone === */
    body {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* 中型手机：600px 以下进一步加强 */
@media (max-width: 600px) {
    .hero-title {
        font-size: 1.3rem !important;
    }
    .contact-grid {
        grid-template-columns: 1fr !important;
    }
    .contact-card {
        padding: 20px 16px !important;
    }
    .cooperation-grid {
        grid-template-columns: 1fr !important;
    }
    .brand-grid {
        grid-template-columns: 1fr !important;
    }
    .footer-qr-img {
        width: 90px !important;
        height: 90px !important;
    }
    .qr-contact-items {
        flex-direction: column;
        width: 100%;
    }
}

/* 小屏手机：480px 以下 */
@media (max-width: 480px) {
    .section-title {
        font-size: 1.4rem !important;
    }
    .page-title {
        font-size: 1.5rem !important;
    }
    .hero-title {
        font-size: 1.2rem !important;
    }
    .container {
        padding: 0 12px;
    }
    .product-card, .office-card, .contact-card {
        padding: 16px 14px !important;
    }
}


/* ============================================
   品牌页/产品页专用移动端适配
   ============================================ */

@media (max-width: 768px) {
    .brand-page-hero {
        padding: 100px 16px 40px !important;
        min-height: 280px !important;
    }
    .brand-page-info {
        padding: 30px 16px !important;
    }
    .brand-logo-large {
        width: 100px !important;
        height: 100px !important;
        margin: 0 auto 16px !important;
    }
    .brand-page-header {
        font-size: 1.8rem !important;
    }
    .brand-slogan {
        font-size: 0.95rem !important;
    }
    .brand-product-catalog {
        padding: 30px 16px !important;
    }
    .model-search-box {
        padding: 16px !important;
        margin-bottom: 20px !important;
    }
    .search-input-wrapper input {
        font-size: 0.9rem;
        padding: 10px 14px !important;
    }
    .search-btn {
        padding: 10px 16px !important;
        font-size: 0.85rem;
    }
    .search-hints {
        font-size: 0.7rem !important;
    }
    .search-results {
        margin-top: 12px !important;
        max-height: 240px;
    }
    .brand-category {
        padding: 16px !important;
        margin-bottom: 16px !important;
    }
    .category-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 8px;
        margin-bottom: 12px !important;
    }
    .category-title {
        font-size: 1.05rem !important;
    }
    .category-num {
        font-size: 0.7rem !important;
    }
    .model-grid-2,
    .model-grid-4 {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }
    .model-card-detailed {
        padding: 12px !important;
    }
    .model-card-detailed .model-name {
        font-size: 0.85rem !important;
    }
    .model-specs {
        font-size: 0.7rem !important;
    }
}

@media (max-width: 480px) {
    .brand-page-header {
        font-size: 1.5rem !important;
    }
    .model-search-box {
        padding: 12px !important;
    }
}


/* ============================================
   型号卡片点击样式
   ============================================ */
.model-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
    position: relative;
    transition: all 0.3s ease;
    cursor: pointer;
}
.model-card-link:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    background: rgba(0, 212, 170, 0.06);
    box-shadow: 0 8px 24px rgba(0, 212, 170, 0.15);
}
.model-card-link .view-detail {
    display: block;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--accent);
    text-align: right;
    transition: all 0.3s;
}
.model-card-link:hover .view-detail {
    color: var(--primary);
    letter-spacing: 0.05em;
}