/* =====================================================
   华徕工业省电空调 - 易优CMS模板样式
   主题色：蓝色系 #32468C (深蓝), #4A5ECF (主蓝), #6E96C8 (中蓝)
   辅助色：#AAA0D2 (浅紫蓝), #E8EDF5 (背景)
   ===================================================== */

/* --- 基础重置 --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background: #f8f9fc;
}
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- 主题色变量 --- */
:root {
    --primary: #32468C;
    --primary-dark: #283282;
    --primary-light: #4A5ECF;
    --secondary: #6E96C8;
    --accent: #AAA0D2;
    --accent-light: #E8EDF5;
    --text: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --bg: #f8f9fc;
    --bg-white: #ffffff;
    --border: #e0e4ed;
    --gradient-primary: linear-gradient(135deg, #32468C 0%, #4A5ECF 100%);
    --gradient-light: linear-gradient(135deg, #6E96C8 0%, #AAA0D2 100%);
    --shadow: 0 4px 20px rgba(50, 70, 140, 0.12);
    --shadow-hover: 0 8px 30px rgba(50, 70, 140, 0.2);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 按钮 --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    gap: 8px;
}
.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(50, 70, 140, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(50, 70, 140, 0.4);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}
.btn-white {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    color: var(--primary);
}

/* --- 公共标题 --- */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}
.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}
.section-title p {
    font-size: 16px;
    color: var(--text-light);
    margin-top: 20px;
}
.section-title .en {
    font-size: 14px;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    display: block;
}

/* =====================================================
   HEADER  (Enhanced: dropdown + mobile menu)
   ===================================================== */

/* --- 顶部信息栏 --- */
.top-bar {
    background: var(--primary-dark);
    color: #fff;
    font-size: 13px;
    padding: 8px 0;
    position: relative;
    z-index: 1001;
}
.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-bar-left { display: flex; gap: 20px; align-items: center; }
.top-bar-right { display: flex; gap: 20px; align-items: center; }
.top-bar-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    opacity: 0.85;
    transition: opacity 0.3s;
}
.top-bar-item:hover { opacity: 1; }
.top-bar-item svg { flex-shrink: 0; }

/* --- 主导航 --- */
.header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    transition: var(--transition);
}
.header.scrolled {
    box-shadow: 0 4px 30px rgba(50, 70, 140, 0.15);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    position: relative;
}

/* --- Logo --- */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.logo img { height: 70px; width: auto; }
.logo-text h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}
.logo-text span {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* --- 桌面端导航 --- */
.nav-desktop { flex: 1; display: flex; justify-content: center; }
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-item {
    position: relative;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 20px;
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    border-radius: 50px;
    transition: var(--transition);
    white-space: nowrap;
}
.nav-arrow {
    transition: transform 0.3s ease;
    opacity: 0.6;
}
.nav-item:hover .nav-arrow,
.nav-item.active .nav-arrow {
    transform: rotate(180deg);
    opacity: 1;
}
.nav-item:hover .nav-link,
.nav-item.active .nav-link {
    color: var(--primary);
    background: var(--accent-light);
}

/* --- 二级下拉菜单 --- */
.nav-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 200px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(50, 70, 140, 0.15);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border);
    z-index: 999;
}
.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: #fff;
    border-left: 1px solid var(--border);
    border-top: 1px solid var(--border);
}
.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}
.nav-dropdown-item {
    position: relative;
}
.nav-dropdown-link {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text);
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
}
.nav-dropdown-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--gradient-primary);
    border-radius: 0 2px 2px 0;
    transition: height 0.3s ease;
}
.nav-dropdown-link:hover,
.nav-dropdown-item.active .nav-dropdown-link {
    color: var(--primary);
    background: var(--accent-light);
    padding-left: 24px;
}
.nav-dropdown-link:hover::before,
.nav-dropdown-item.active .nav-dropdown-link::before {
    height: 60%;
}

/* --- 头部联系区 --- */
.header-contact {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}
.header-contact .hotline {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}
.header-contact .hotline span {
    font-size: 12px;
    color: var(--text-muted);
}
.header-contact .hotline strong {
    font-size: 18px;
    color: var(--primary);
    font-weight: 700;
}
.btn-header {
    padding: 10px 24px;
    font-size: 14px;
    white-space: nowrap;
}

/* --- 汉堡按钮 --- */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}
.mobile-toggle:hover { background: var(--accent-light); }
.hamburger-line {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--primary);
    border-radius: 2px;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}
.mobile-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}
.mobile-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.mobile-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* --- 手机端全屏菜单 --- */
.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(50, 70, 140, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
}
.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}
.mobile-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    background: #fff;
    z-index: 1002;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 30px rgba(0,0,0,0.15);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.mobile-nav.active {
    transform: translateX(0);
}
.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.mobile-nav-header .logo { gap: 8px; }
.mobile-nav-header .logo img { height: 36px; }
.mobile-nav-header .logo-text h1 { font-size: 18px; }
.mobile-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: var(--primary);
    transition: var(--transition);
}
.mobile-close:hover {
    background: var(--primary);
    color: #fff;
}
.mobile-nav-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0;
}
.mobile-menu { padding: 0 20px; }
.mobile-item {
    border-bottom: 1px solid var(--border);
}
.mobile-link-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.mobile-link {
    display: block;
    padding: 14px 0;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    transition: var(--transition);
    flex: 1;
}
.mobile-link:hover,
.mobile-item.active > .mobile-link-wrap .mobile-link {
    color: var(--primary);
}
.mobile-submenu-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    border-radius: 8px;
    transition: var(--transition);
    flex-shrink: 0;
}
.mobile-submenu-toggle:hover { background: var(--accent-light); color: var(--primary); }
.mobile-submenu-toggle svg { transition: transform 0.3s ease; }
.mobile-submenu-toggle.active svg { transform: rotate(90deg); }
.mobile-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    padding-left: 12px;
}
.mobile-submenu.open {
    max-height: 500px;
}
.mobile-submenu-item {
    border-bottom: 1px dashed var(--border);
}
.mobile-submenu-item:last-child { border-bottom: none; }
.mobile-submenu-link {
    display: block;
    padding: 12px 0 12px 16px;
    font-size: 14px;
    color: var(--text-light);
    position: relative;
    transition: var(--transition);
}
.mobile-submenu-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--secondary);
    opacity: 0.6;
    transition: var(--transition);
}
.mobile-submenu-link:hover,
.mobile-submenu-item.active .mobile-submenu-link {
    color: var(--primary);
    padding-left: 20px;
}
.mobile-submenu-link:hover::before,
.mobile-submenu-item.active .mobile-submenu-link::before {
    background: var(--primary);
    opacity: 1;
}
.mobile-contact {
    padding: 20px;
    border-top: 1px solid var(--border);
    margin-top: auto;
    flex-shrink: 0;
}
.header-contact .btn {
    padding: 10px 24px;
    font-size: 14px;
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    background: linear-gradient(180deg, var(--primary-dark) 0%, #1a2456 100%);
    color: #fff;
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo-footer {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.footer-brand .logo-footer img { height: 40px; }
.footer-brand .logo-footer h3 {
    font-size: 20px;
    font-weight: 700;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.7);
    margin-bottom: 16px;
}
.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--secondary);
    border-radius: 2px;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-links a::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--secondary);
}
.footer-links a:hover { color: #fff; padding-left: 5px; }
.footer-contact p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.footer-contact .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--secondary);
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* =====================================================
   BANNER / HERO
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0f4ff 0%, #e8edff 50%, #dce4ff 100%);
    overflow: hidden;
    padding-top: 80px;
}
.hero-bg-pattern {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at 70% 50%, rgba(74, 94, 207, 0.08) 0%, transparent 70%);
}
.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero-text .tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(50, 70, 140, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}
.hero-text h2 {
    font-size: 52px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: 16px;
}
.hero-text h2 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-text .subtitle {
    font-size: 24px;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 20px;
}
.hero-text .desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}
.hero-stat-item {
    text-align: center;
    padding: 16px;
    background: rgba(255,255,255,0.7);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
}
.hero-stat-item .num {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}
.hero-stat-item .num span { font-size: 16px; }
.hero-stat-item .label {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 6px;
}
.hero-btns { display: flex; gap: 16px; }
.hero-image {
    position: relative;
    z-index: 2;
}
.hero-image img {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    filter: drop-shadow(0 20px 40px rgba(50,70,140,0.2));
    animation: float 6s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* =====================================================
   品牌介绍 / ABOUT
   ===================================================== */
.about {
    padding: 80px 0;
    background: var(--bg-white);
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-image {
    position: relative;
}
.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}
.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--accent);
    border-radius: var(--radius-lg);
    z-index: -1;
}
.about-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
}
.about-content p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}
.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 24px;
}
.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--accent-light);
    border-radius: var(--radius);
    border-left: 3px solid var(--primary);
}
.about-feature .icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    flex-shrink: 0;
}
.about-feature span {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

/* =====================================================
   数据展示 / STATS
   ===================================================== */
.stats-section {
    padding: 60px 0;
    background: var(--gradient-primary);
    color: #fff;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}
.stats-item .num {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
}
.stats-item .num span { font-size: 24px; }
.stats-item .label {
    font-size: 16px;
    opacity: 0.9;
}
.stats-item .desc {
    font-size: 13px;
    opacity: 0.7;
    margin-top: 4px;
}

/* =====================================================
   产品展示 / PRODUCTS
   ===================================================== */
.products {
    padding: 80px 0;
    background: var(--bg);
}
.product-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}
.product-tab {
    padding: 12px 28px;
    background: #fff;
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
}
.product-tab:hover, .product-tab.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(50,70,140,0.3);
}
.product-tabs-panel{
    display: none;
}
.product-tabs-panel.active{
    display: block;
}
.product-grid {

    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.product-image {
    position: relative;
    padding: 20px;
    background: linear-gradient(135deg, var(--accent-light) 0%, #fff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 240px;
}
.product-image img {
    max-height: 200px;
    width: auto;
    transition: var(--transition);
}
.product-card:hover .product-image img {
    transform: scale(1.05);
}
.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
}
.product-info { padding: 24px; }
.product-info h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}
.product-info .model {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.product-params {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}
.product-param {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    padding: 6px 0;
    border-bottom: 1px dashed var(--border);
}
.product-param .key { color: var(--text-light); }
.product-param .val { color: var(--primary); font-weight: 600; }
.product-actions {
    display: flex;
    gap: 10px;
}
.product-actions .btn {
    flex: 1;
    padding: 10px;
    font-size: 14px;
}

/* =====================================================
   优势展示 / ADVANTAGES
   ===================================================== */
.advantages {
    padding: 80px 0;
    background: var(--bg-white);
}
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.advantage-card {
    padding: 40px 30px;
    background: #fff;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}
.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.advantage-card:hover::before {
    transform: scaleX(1);
}
.advantage-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
    color: var(--primary);
    transition: var(--transition);
}
.advantage-card:hover .advantage-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: rotateY(360deg);
}
.advantage-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.advantage-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* =====================================================
   对比表格 / COMPARISON
   ===================================================== */
.comparison {
    padding: 80px 0;
    background: var(--bg);
}
.comparison-table-wrap {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.comparison-table {
    width: 100%;
    border-collapse: collapse;
}
.comparison-table th {
    background: var(--gradient-primary);
    color: #fff;
    padding: 16px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
}
.comparison-table td {
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    text-align: center;
}
.comparison-table tr:nth-child(even) {
    background: var(--accent-light);
}
.comparison-table .highlight {
    color: var(--primary);
    font-weight: 700;
}
.comparison-table .winner {
    background: rgba(50, 70, 140, 0.05);
    color: var(--primary);
    font-weight: 600;
}

/* =====================================================
   应用案例 / CASES
   ===================================================== */
.cases {
    padding: 80px 0;
    background: var(--bg-white);
}
.case-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.case-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    aspect-ratio: 4/3;
}
.case-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.case-card:hover img {
    transform: scale(1.1);
}
.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(transparent, rgba(50,70,140,0.9));
    color: #fff;
    transition: var(--transition);
}
.case-card:hover .case-overlay {
    padding-bottom: 30px;
}
.case-overlay h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}
.case-overlay p {
    font-size: 13px;
    opacity: 0.8;
}

/* =====================================================
   服务流程 / SERVICE
   ===================================================== */
.service {
    padding: 80px 0;
    background: var(--gradient-primary);
    color: #fff;
}
.service .section-title h2,
.service .section-title p { color: #fff; }
.service .section-title h2::after { background: rgba(255,255,255,0.5); }
.service-steps {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    position: relative;
}
.service-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    width: 80%;
    height: 2px;
    background: rgba(255,255,255,0.2);
    z-index: 0;
}
.service-step {
    position: relative;
    z-index: 1;
    text-align: center;
    flex: 1;
}
.service-step .num {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    margin: 0 auto 16px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}
.service-step:hover .num {
    background: #fff;
    color: var(--primary);
    transform: scale(1.1);
}
.service-step h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}
.service-step p {
    font-size: 13px;
    opacity: 0.8;
}

/* =====================================================
   新闻资讯 / NEWS
   ===================================================== */
.news {
    padding: 80px 0;
    background: var(--bg);
}
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.news-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}
.news-image {
    height: 200px;
    overflow: hidden;
}
.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.news-card:hover .news-image img {
    transform: scale(1.1);
}
.news-content { padding: 24px; }
.news-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}
.news-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.4;
    margin-bottom: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.news-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

/* =====================================================
   页面横幅 / PAGE BANNER
   ===================================================== */
.page-banner {
    position: relative;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    text-align: center;
    padding-top: 80px;
}
.page-banner h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}
.page-banner p {
    font-size: 16px;
    opacity: 0.8;
}
.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    margin-top: 12px;
}
.breadcrumb a:hover { opacity: 1; text-decoration: underline; }

/* =====================================================
   列表页 / LIST
   ===================================================== */
.list-page {
    padding: 60px 0;
    background: var(--bg);
}
.list-layout {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 40px;
}
.list-main { background: #fff; border-radius: var(--radius); padding: 30px; }
.list-sidebar .sidebar-block {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}
.sidebar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-light);
    margin-bottom: 16px;
}
.sidebar-list li { margin-bottom: 10px; }
.sidebar-list a {
    font-size: 14px;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list .count {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--accent-light);
    padding: 2px 8px;
    border-radius: 10px;
}

/* 文章列表 */
.article-list .article-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
}
.article-item-image {
    border-radius: var(--radius);
    overflow: hidden;
    height: 140px;
}
.article-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.article-item:hover .article-item-image img {
    transform: scale(1.05);
}
.article-item-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}
.article-item-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.article-item-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}
.pagination a, .pagination span {
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text);
    background: #fff;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.pagination a:hover, .pagination .current {
    background: var(--gradient-primary);
    color: #fff;
    border-color: var(--primary);
}

/* =====================================================
   内容页 / VIEW
   ===================================================== */
.view-page {
    padding: 60px 0;
    background: var(--bg);
}
.view-layout {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 40px;
}
.view-main {
    background: #fff;
    border-radius: var(--radius);
    padding: 40px;
}
.view-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--accent-light);
}
.view-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.4;
}
.view-meta {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: var(--text-muted);
}
.view-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
}
.view-content p { margin-bottom: 16px; }
.view-content img {
    max-width: 100%;
    border-radius: var(--radius);
    margin: 20px 0;
}
.view-content h2, .view-content h3, .view-content h4 {
    color: var(--primary);
    margin: 24px 0 12px;
}
.view-content ul, .view-content ol {
    margin: 16px 0;
    padding-left: 24px;
}
.view-content ul li { list-style: disc; margin-bottom: 8px; }
.view-content ol li { list-style: decimal; margin-bottom: 8px; }

.view-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.view-prev-next {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.view-prev-next a {
    padding: 16px;
    background: var(--accent-light);
    border-radius: var(--radius);
    font-size: 14px;
    transition: var(--transition);
}
.view-prev-next a:hover {
    background: var(--primary);
    color: #fff;
}
.view-prev-next .label {
    font-size: 12px;
    opacity: 0.7;
    margin-bottom: 4px;
}

/* =====================================================
   产品详情页 / PRODUCT DETAIL
   ===================================================== */
.product-detail { padding: 0; background: transparent; }
.product-detail-header {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}
.product-gallery { display: flex; flex-direction: column; gap: 16px; }
.product-main-image {
    background: var(--accent-light);
    border-radius: var(--radius);
    padding: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 350px;
}
.product-main-image img {
    max-height: 300px;
    width: auto;
    object-fit: contain;
}
.product-thumbs {
    display: flex;
    gap: 12px;
    overflow-x: auto;
}
.product-thumbs .thumb {
    width: 80px;
    height: 80px;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    padding: 8px;
    cursor: pointer;
    transition: var(--transition);
    object-fit: contain;
    background: #fff;
}
.product-thumbs .thumb.active,
.product-thumbs .thumb:hover {
    border-color: var(--primary);
}
.product-info-panel { display: flex; flex-direction: column; gap: 20px; }
.product-series-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
    align-self: flex-start;
}
.product-name { font-size: 28px; font-weight: 700; color: var(--primary); }
.product-model { font-size: 16px; color: var(--text-muted); }
.product-key-params {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    padding: 20px;
    background: var(--accent-light);
    border-radius: var(--radius);
}
.key-param {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.key-param-label { font-size: 12px; color: var(--text-muted); }
.key-param-value { font-size: 18px; font-weight: 700; color: var(--primary); }
.product-actions-panel { display: flex; gap: 12px; margin-top: auto; }
.btn-lg { padding: 14px 36px; font-size: 16px; }

/* 产品标签页 */
.product-detail-body { background: #fff; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); margin-bottom: 30px; }
.product-tabs-nav {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 16px;
    margin-bottom: 30px;
    overflow-x: auto;
}
.product-tab-btn {
    padding: 10px 24px;
    background: none;
    border: none;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    border-radius: 50px;
    transition: var(--transition);
    white-space: nowrap;
}
.product-tab-btn:hover { background: var(--accent-light); color: var(--primary); }
.product-tab-btn.active { background: var(--gradient-primary); color: #fff; }
.product-tab-panel { display: none; }
.product-tab-panel.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.panel-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-light);
}

/* 参数表格 */
.params-table-wrap { overflow-x: auto; }
.params-table { width: 100%; border-collapse: collapse; }
.params-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
.params-table tr:nth-child(even) { background: var(--accent-light); }
.param-name { color: var(--text-light); width: 30%; font-weight: 500; }
.param-value { color: var(--text); font-weight: 600; }

/* 应用场景 */
.application-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.application-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 16/10;
}
.application-card img { width: 100%; height: 100%; object-fit: cover; }
.application-card span {
    position: absolute;
    bottom: 0; left: 0; width: 100%;
    padding: 12px;
    background: linear-gradient(transparent, rgba(50,70,140,0.8));
    color: #fff;
    font-size: 14px;
    font-weight: 600;
}

/* 资料下载 */
.download-list { display: flex; flex-direction: column; gap: 16px; }
.download-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.download-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}
.download-icon {
    width: 56px; height: 56px;
    background: var(--accent-light);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}
.download-info { flex: 1; }
.download-info h4 { font-size: 16px; font-weight: 600; color: var(--primary); margin-bottom: 4px; }
.download-info p { font-size: 13px; color: var(--text-light); }
.download-btn {
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    flex-shrink: 0;
    transition: var(--transition);
}
.download-item:hover .download-btn { box-shadow: 0 4px 12px rgba(50,70,140,0.3); }

/* 相关产品 */
.related-products { background: #fff; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); margin-bottom: 30px; }

/* =====================================================
   案例列表页 / CASE LIST
   ===================================================== */
.case-filter {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 10px 24px;
    background: #fff;
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: var(--transition);
    cursor: pointer;
}
.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(50,70,140,0.3);
}
.case-grid-large {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.case-card-large {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.case-card-large:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.case-card-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}
.case-card-image img {
    width: 100%; height: 100%; object-fit: cover;
    transition: var(--transition);
}
.case-card-large:hover .case-card-image img { transform: scale(1.08); }
.case-card-tag {
    position: absolute;
    top: 16px; left: 16px;
    padding: 6px 14px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
}
.case-card-content { padding: 24px; }
.case-card-content h3 { font-size: 18px; font-weight: 600; color: var(--primary); margin-bottom: 10px; }
.case-card-content p { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 14px; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.case-card-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.case-card-meta span { display: flex; align-items: center; gap: 4px; }
.btn-sm { padding: 8px 20px; font-size: 13px; }

/* =====================================================
   案例详情页 / CASE DETAIL
   ===================================================== */
.case-detail { padding: 0; background: transparent; }
.case-detail-header { margin-bottom: 30px; }
.case-hero-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-height: 400px;
    margin-bottom: 24px;
}
.case-hero-image img { width: 100%; height: 100%; object-fit: cover; }
.case-summary { background: #fff; border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.case-meta-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.case-tag {
    padding: 6px 14px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 50px;
}
.case-date,
.case-location {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}
.case-summary h1 { font-size: 24px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.case-desc { font-size: 15px; color: var(--text-light); line-height: 1.6; }

/* 案例信息卡片 */
.case-info-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}
.case-info-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.case-info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}
.info-card-icon { font-size: 32px; }
.info-card-content { display: flex; flex-direction: column; gap: 4px; }
.info-card-label { font-size: 13px; color: var(--text-muted); }
.info-card-value { font-size: 18px; font-weight: 700; color: var(--primary); }

/* 案例内容 */
.case-content { background: #fff; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); margin-bottom: 30px; }

/* 案例图集 */
.case-gallery { background: #fff; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); margin-bottom: 30px; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery-item {
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: var(--transition);
}
.gallery-item:hover { transform: scale(1.02); box-shadow: var(--shadow-hover); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.gallery-item:hover img { transform: scale(1.08); }

/* =====================================================
   公司简介页 / ABOUT COMPANY
   ===================================================== */
.about-company { padding: 60px 0; background: var(--bg-white); }
.about-company-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-company-image { position: relative; }
.about-company-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow); width: 100%; }
.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--gradient-primary);
    color: #fff;
    padding: 20px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-hover);
}
.exp-num { font-size: 36px; font-weight: 800; display: block; line-height: 1; }
.exp-text { font-size: 14px; opacity: 0.9; margin-top: 4px; }
.about-company-content .section-en {
    font-size: 14px;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    display: block;
}
.about-company-content h2 { font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.about-company-content h3 { font-size: 20px; color: var(--secondary); margin-bottom: 20px; font-weight: 500; }
.about-company-content p { font-size: 15px; color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.about-company-content strong { color: var(--primary); }
.company-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 24px;
}
.highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--accent-light);
    border-radius: var(--radius);
    border-left: 3px solid var(--primary);
    transition: var(--transition);
}
.highlight-item:hover { transform: translateX(4px); }
.highlight-icon { font-size: 28px; }
.highlight-text { display: flex; flex-direction: column; }
.highlight-text strong { font-size: 18px; color: var(--primary); }
.highlight-text span { font-size: 12px; color: var(--text-muted); }

/* 发展历程 */
.timeline-section { padding: 80px 0; background: var(--bg); }
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
    border-radius: 3px;
}
.timeline-item {
    position: relative;
    display: flex;
    align-items: center;
    margin-bottom: 40px;
}
.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }
.timeline-year {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(50,70,140,0.3);
    position: relative;
    z-index: 2;
}
.timeline-content {
    width: calc(50% - 60px);
    background: #fff;
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.timeline-item:nth-child(odd) .timeline-content { margin-right: 40px; text-align: right; }
.timeline-item:nth-child(even) .timeline-content { margin-left: 40px; text-align: left; }
.timeline-content h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.timeline-content p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* 企业文化 */
.culture-section { padding: 80px 0; background: var(--bg-white); }
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.culture-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.culture-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}
.culture-icon { font-size: 40px; margin-bottom: 16px; }
.culture-card h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.culture-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* 资质荣誉 */
.honors-section { padding: 80px 0; background: var(--bg); }
.honors-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}
.honor-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px 16px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.honor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.honor-icon { font-size: 36px; margin-bottom: 12px; }
.honor-card h4 { font-size: 15px; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.honor-card p { font-size: 12px; color: var(--text-light); }

/* 核心团队 */
.team-section { padding: 80px 0; background: var(--bg-white); }
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.team-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.team-avatar {
    width: 72px;
    height: 72px;
    background: var(--accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    margin: 0 auto 16px;
    transition: var(--transition);
}
.team-card:hover .team-avatar { background: var(--gradient-primary); transform: scale(1.1); }
.team-card h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.team-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* 合作客户 */
.clients-section { padding: 80px 0; background: var(--bg); }
.clients-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}
.client-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.client-card:hover {
    background: var(--gradient-primary);
    color: #fff;
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

/* =====================================================
   联系我们/留言页 / CONTACT & MESSAGE
   ===================================================== */
.contact-section { padding: 60px 0; background: var(--bg); }
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
}
.contact-info-panel { background: #fff; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
.contact-info-panel h2 { font-size: 28px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.contact-desc { font-size: 15px; color: var(--text-light); margin-bottom: 30px; }
.contact-methods { display: flex; flex-direction: column; gap: 20px; margin-bottom: 30px; }
.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: var(--accent-light);
    border-radius: var(--radius);
    transition: var(--transition);
}
.contact-method:hover { background: rgba(50,70,140,0.08); }
.method-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}
.method-content { display: flex; flex-direction: column; gap: 2px; }
.method-content h4 { font-size: 15px; font-weight: 600; color: var(--primary); }
.method-content p { font-size: 18px; font-weight: 700; color: var(--text); }
.method-content span { font-size: 13px; color: var(--text-muted); }

.contact-cta {
    padding: 24px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    color: #fff;
    text-align: center;
}
.contact-cta h4 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.contact-cta p { font-size: 14px; opacity: 0.9; margin-bottom: 16px; }
.contact-cta .btn-white { width: 100%; justify-content: center; }

/* 表单 */
.contact-form-panel { background: #fff; border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
.contact-form-panel h3 { font-size: 24px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.contact-form-panel > p { font-size: 14px; color: var(--text-light); margin-bottom: 24px; }
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 14px; font-weight: 500; color: var(--text); }
.required { color: #e74c3c; }
.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text);
    transition: var(--transition);
    background: #fff;
    font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(50,70,140,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.verify-row { display: flex; gap: 12px; }
.verify-row input { flex: 1; }
.verify-img {
    height: 44px;
    border-radius: var(--radius);
    cursor: pointer;
    border: 1px solid var(--border);
}
.form-submit { margin-top: 8px; }

/* 服务承诺 */
.service-promise { padding: 80px 0; background: var(--bg-white); }
.promise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.promise-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.promise-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.promise-num {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    margin: 0 auto 16px;
}
.promise-card h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.promise-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* 地图 */
.map-section { padding: 80px 0 60px; background: var(--bg); }
.map-wrap {
    position: relative;
    width: 100%;
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--accent-light);
}
.map-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-light) 0%, #dce4ff 100%);
}
.map-info {
    text-align: center;
    padding: 30px;
}
.map-info h4 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.map-info p { font-size: 15px; color: var(--text-light); margin-bottom: 16px; }

/* =====================================================
   响应式补充
   ===================================================== */
@media (max-width: 1024px) {
    .product-detail-header { grid-template-columns: 1fr; }
    .product-actions-panel { flex-wrap: wrap; }
    .case-grid-large { grid-template-columns: repeat(2, 1fr); }
    .application-grid { grid-template-columns: repeat(2, 1fr); }
    .case-info-cards { grid-template-columns: repeat(2, 1fr); }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); }
    .about-company-grid { grid-template-columns: 1fr; }
    .experience-badge { right: 20px; }
    .culture-grid { grid-template-columns: repeat(2, 1fr); }
    .honors-grid { grid-template-columns: repeat(3, 1fr); }
    .team-grid { grid-template-columns: repeat(2, 1fr); }
    .clients-grid { grid-template-columns: repeat(3, 1fr); }
    .contact-layout { grid-template-columns: 1fr; }
    .promise-grid { grid-template-columns: repeat(2, 1fr); }
    .related-products .product-grid { grid-template-columns: repeat(2, 1fr); }
    .company-highlights { grid-template-columns: repeat(2, 1fr); }
    .timeline::before { left: 30px; }
    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        flex-direction: row;
        padding-left: 70px;
    }
    .timeline-year { position: absolute; left: 0; width: 60px; height: 60px; font-size: 14px; }
    .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: 100%;
        margin: 0;
        text-align: left;
    }
}

@media (max-width: 768px) {
    .product-detail-header { padding: 24px; }
    .product-name { font-size: 22px; }
    .product-key-params { grid-template-columns: 1fr; }
    .product-tabs-nav { gap: 4px; }
    .product-tab-btn { padding: 8px 16px; font-size: 13px; }
    .params-table td { padding: 10px 12px; font-size: 13px; }
    .case-grid-large { grid-template-columns: 1fr; }
    .application-grid { grid-template-columns: 1fr; }
    .case-info-cards { grid-template-columns: 1fr; }
    .gallery-grid { grid-template-columns: 1fr; }
    .download-item { flex-direction: column; text-align: center; }
    .about-company-content h2 { font-size: 26px; }
    .experience-badge { padding: 14px 20px; bottom: -10px; right: 10px; }
    .exp-num { font-size: 28px; }
    .culture-grid { grid-template-columns: 1fr; }
    .honors-grid { grid-template-columns: repeat(2, 1fr); }
    .team-grid { grid-template-columns: 1fr; }
    .clients-grid { grid-template-columns: repeat(2, 1fr); }
    .promise-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .map-wrap { height: 300px; }
    .related-products .product-grid { grid-template-columns: 1fr; }
    .company-highlights { grid-template-columns: 1fr; }
    .product-detail-body { padding: 24px; }
    .case-content { padding: 24px; }
    .contact-info-panel,
    .contact-form-panel { padding: 24px; }
    .product-gallery { gap: 10px; }
    .product-main-image { min-height: 250px; padding: 20px; }
    .product-main-image img { max-height: 200px; }
    .case-hero-image { max-height: 250px; }
}

@media (max-width: 480px) {
    .product-detail-header { padding: 16px; border-radius: var(--radius); }
    .case-card-content { padding: 16px; }
    .honors-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .honor-card { padding: 20px 10px; }
    .experience-badge { right: 5px; bottom: -10px; padding: 10px 16px; }
    .exp-num { font-size: 24px; }
    .timeline-item { padding-left: 60px; }
    .timeline-year { width: 50px; height: 50px; font-size: 12px; }
}
@media (max-width: 1200px) {
    .header-contact .hotline { display: none; }
}

@media (max-width: 1024px) {
    .nav-desktop { display: none; }
    .mobile-toggle { display: flex; }
    .header-inner { height: 70px; }
    .btn-header { padding: 8px 18px; font-size: 13px; }
    .hero-content { grid-template-columns: 1fr; gap: 40px; text-align: center; }
    .hero-text h2 { font-size: 40px; }
    .hero-stats { justify-content: center; }
    .about-grid { grid-template-columns: 1fr; }
    .about-image { order: -1; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .list-layout, .view-layout { grid-template-columns: 1fr; }
    .top-bar-right { display: none; }
    .top-bar .container { justify-content: center; }
}

@media (max-width: 768px) {
    .header-inner { height: 64px; }
    .logo img { height: 38px; }
    .logo-text h1 { font-size: 18px; }
    .logo-text span { display: none; }
    .header-contact { display: none; }
    .mobile-toggle { display: flex; }
    .hero { min-height: auto; padding: 80px 0 50px; }
    .hero-text h2 { font-size: 30px; }
    .hero-stats { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .product-grid { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .service-steps { flex-wrap: wrap; }
    .service-steps::before { display: none; }
    .service-step { flex: 1 1 40%; }
    .news-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .about-features { grid-template-columns: 1fr; }
    .section-title h2 { font-size: 24px; }
    .article-list .article-item { grid-template-columns: 1fr; }
    .article-item-image { height: 200px; }
    .page-banner { height: 220px; padding-top: 64px; }
    .page-banner h2 { font-size: 26px; }
    .mobile-nav { width: 280px; }
}

@media (max-width: 480px) {
    .hero-text h2 { font-size: 24px; }
    .hero-text .subtitle { font-size: 18px; }
    .stats-grid { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: 1fr; }
    .service-step { flex: 1 1 100%; }
    .btn { padding: 10px 20px; font-size: 13px; }
    .btn-header { padding: 8px 14px; }
    .top-bar { font-size: 12px; padding: 6px 0; }
    .comparison-table th,
    .comparison-table td { padding: 10px 8px; font-size: 12px; }
    .mobile-nav { width: 100%; max-width: 100%; }
    .section-title h2 { font-size: 22px; }
    .product-tabs { flex-wrap: wrap; gap: 8px; }
    .product-tab { padding: 8px 16px; font-size: 13px; }
}

/* =====================================================
   动画
   ===================================================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}
.animate.visible {
    opacity: 1;
    transform: translateY(0);
}