/* ============================================
   华纳环保 · 极简科技蓝调 (高端升级版)
   设计语言：玻璃态 · 微交互 · 大留白 · 渐变光影
   ============================================ */
* { margin:0; padding:0; box-sizing:border-box; }
:root {
    --color-bg: #F5F8FE;
    --color-surface: #FFFFFF;
    --color-primary: #0B1E3A;
    --color-secondary: #1E3B6B;
    --color-accent: #2B7BE4;
    --color-accent-light: #6BA5F0;
    --color-accent-dark: #1A4F8B;
    --color-text: #1A2A3A;
    --color-text-secondary: #5A6E86;
    --color-border: #E2E8F0;
    --color-white: #FFFFFF;
    --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
    --shadow-xl: 0 30px 80px rgba(0,0,0,0.1);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', serif;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width:100%; display:block; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-accent); border-radius: 6px; }

/* 通用标题 — 支持动态样式 */
.section-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 12px;
    position: relative;
}
.section-label::after {
    content: '';
    display: block;
    width: 30px;
    height: 2px;
    background: var(--color-accent);
    margin-top: 6px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: 44px;
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.section-title .highlight {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-sub {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    line-height: 1.7;
}
.section {
    padding: 80px 0;
    transition: var(--transition);
}
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header .section-sub { margin: 0 auto; }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(43,123,228,0.35);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 35px rgba(43,123,228,0.45);
}
.btn-primary span { transition: transform 0.3s; display: inline-block; }
.btn-primary:hover span { transform: translateX(6px); }
.btn-outline {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.4);
    backdrop-filter: blur(4px);
}
.btn-outline:hover {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
}
.btn-outline-dark {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}
.btn-outline-dark:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(43,123,228,0.04);
}
.btn-full { width: 100%; justify-content: center; }

/* 导航 */
.header {
    position: fixed;
    top:0;left:0;right:0;
    z-index:1000;
    padding: 0 32px;
    transition: var(--transition);
    background: transparent;
}
.header.scrolled {
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: 0 1px 30px rgba(0,0,0,0.06);
}
.header.scrolled .logo-text .brand { color: var(--color-primary); }
.header.scrolled .logo-text .brand .accent { color: var(--color-accent); }
.header.scrolled .nav a { color: var(--color-text-secondary); }
.header.scrolled .nav a:hover,
.header.scrolled .nav a.active { color: var(--color-primary); }
.header.scrolled .nav .btn-nav {
    background: var(--color-accent);
    color: #fff;
}
.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}
.logo-icon { width: 44px; height: 44px; }
.logo-icon svg { width:100%; height:100%; }
.logo-text .brand {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
}
.logo-text .brand .accent {
    color: var(--color-accent-light);
}
.logo-text .sub {
    font-size: 8px;
    letter-spacing: 3px;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    display: block;
    margin-top: -2px;
}
.nav ul {
    display: flex;
    gap: 36px;
    align-items: center;
}
.nav a {
    color: rgba(255,255,255,0.75);
    font-size: 14px;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}
.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}
.nav a:hover::after,
.nav a.active::after { width: 100%; }
.nav .btn-nav {
    padding: 8px 28px;
    background: rgba(255,255,255,0.12);
    border-radius: 50px;
    color: #fff;
    font-weight: 500;
}
.nav .btn-nav:hover {
    background: #fff;
    color: var(--color-primary);
}
.nav .btn-nav::after { display: none; }
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}
.header.scrolled .mobile-menu-btn { color: var(--color-primary); }

/* Hero 封面 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 750px;
    background: linear-gradient(135deg, #0B1E3A 0%, #1A3B6B 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
}
.hero-bg {
    position: absolute;
    top:0;left:0;width:100%;height:100%;
}
.hero-bg .grid {
    position: absolute;
    top:0;left:0;width:100%;height:100%;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}
.hero-bg .glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.25;
}
.hero-bg .glow.g1 {
    top: -200px;
    right: -100px;
    background: radial-gradient(circle, var(--color-accent), transparent 70%);
    animation: float 10s ease-in-out infinite alternate;
}
.hero-bg .glow.g2 {
    bottom: -200px;
    left: -100px;
    background: radial-gradient(circle, #00B4D8, transparent 70%);
    animation: float 14s ease-in-out infinite alternate-reverse;
}
.hero-bg .glow.g3 {
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(43,123,228,0.08), transparent 70%);
    animation: pulseGlow 8s ease-in-out infinite;
}
@keyframes float {
    0% { transform: translate(0,0) scale(1); }
    100% { transform: translate(50px,-40px) scale(1.1); }
}
@keyframes pulseGlow {
    0%,100% { opacity:0.2; transform: translate(-50%,-50%) scale(1); }
    50% { opacity:0.5; transform: translate(-50%,-50%) scale(1.3); }
}
.hero-slider {
    position: absolute;
    top:0;left:0;width:100%;height:100%;
}
.hero-slide {
    position: absolute;
    top:0;left:0;width:100%;height:100%;
    opacity:0;
    transition: opacity 1.5s ease;
    background-size: cover;
    background-position: center;
}
.hero-slide.active { opacity:1; }
.hero-slide .slide-overlay {
    position: absolute;
    top:0;left:0;width:100%;height:100%;
    background: rgba(11,30,58,0.55);
}
.hero-slide .slide-content {
    position: absolute;
    bottom: 180px;
    left: 40px;
    color: #fff;
    z-index:2;
}
.hero-slide .slide-content h3 {
    font-size: 32px;
    font-weight: 600;
    font-family: var(--font-serif);
}
.hero-slide .slide-content p { opacity:0.8; font-size:18px; }
.hero-content {
    position: relative;
    z-index:10;
    width:100%;
    color:#fff;
}
.hero-text {
    max-width: 700px;
    animation: fadeUp 0.9s ease both;
}
.hero-text .badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 22px;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1.5px;
    color: var(--color-accent-light);
    margin-bottom: 28px;
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(8px);
}
.hero-text .badge .dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-light);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%,100% { opacity:1; transform:scale(1); }
    50% { opacity:0.3; transform:scale(0.7); }
}
.hero-text h1 {
    font-size: 68px;
    font-weight: 800;
    line-height: 1.05;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
    font-family: var(--font-serif);
}
.hero-text h1 .highlight {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-text .sub {
    font-size: 20px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 44px;
    max-width: 560px;
}
.hero-text .actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.hero-metrics {
    position: absolute;
    bottom:0;left:0;right:0;
    z-index:10;
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255,255,255,0.06);
}
.metrics-inner {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap:20px;
    padding: 28px 0;
}
.metric-item {
    text-align: center;
    color:#fff;
}
.metric-item .number {
    display: block;
    font-size: 38px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height:1.2;
}
.metric-item .label {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.5px;
}
.hero-indicators {
    position: absolute;
    bottom: 130px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index:10;
}
.hero-indicators .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}
.hero-indicators .dot.active {
    background: var(--color-accent);
    width: 36px;
    border-radius: 6px;
    box-shadow: 0 0 24px rgba(43,123,228,0.3);
}
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.3);
    font-size: 12px;
    letter-spacing: 2px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    z-index:10;
    animation: bounceDown 2s infinite;
}
.scroll-indicator svg { width:20px; height:20px; }
@keyframes bounceDown {
    0%,100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}
@keyframes fadeUp {
    from { opacity:0; transform:translateY(40px); }
    to { opacity:1; transform:translateY(0); }
}

/* 核心优势 */
.advantages { background: var(--color-surface); }
.adv-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 28px;
}
.adv-card {
    padding: 36px 28px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.adv-card::before {
    content: '';
    position: absolute;
    top:0;left:0;right:0;bottom:0;
    background: linear-gradient(135deg, rgba(43,123,228,0.03), transparent);
    opacity:0;
    transition: var(--transition);
}
.adv-card:hover::before { opacity:1; }
.adv-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-xl);
}
.adv-card .icon {
    font-size: 48px;
    display: block;
    margin-bottom: 20px;
}
.adv-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-primary);
}
.adv-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height:1.7;
}

/* 关于 */
.about { background: var(--color-bg); }
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-text .desc {
    color: var(--color-text-secondary);
    font-size: 16px;
    line-height:1.9;
    margin-bottom: 16px;
}
.about-stats {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 16px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}
.about-stats .stat-item { text-align:center; }
.about-stats .stat-item .num {
    display: block;
    font-size: 34px;
    font-weight: 800;
    color: var(--color-accent);
    line-height:1.2;
}
.about-stats .stat-item .lbl { font-size:14px; color:var(--color-text-secondary); }
.about-image .img-wrap {
    border-radius: var(--radius-md);
    overflow: hidden;
    background: linear-gradient(135deg, #E2E8F0, #CBD5E1);
    aspect-ratio:4/3;
    display: flex;
    align-items:center;
    justify-content:center;
    box-shadow: var(--shadow-lg);
}
.about-image .img-wrap img { width:100%; height:100%; object-fit:cover; }
.about-image .img-wrap .placeholder { color:var(--color-text-secondary); }

/* 产品预览 */
.products-preview { background: var(--color-surface); }
.product-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 28px;
}
.product-card {
    padding: 32px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    transition: var(--transition);
    text-align:center;
}
.product-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}
.product-card .emoji { font-size: 40px; display:block; margin-bottom:16px; }
.product-card h4 { font-size:18px; font-weight:600; color:var(--color-primary); }
.product-card p { font-size:14px; color:var(--color-text-secondary); margin-top:4px; }

/* 业务 */
.services { background: var(--color-bg); }
.services-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 28px;
}
.service-card {
    background: var(--color-surface);
    padding: 36px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    text-align:center;
    cursor:pointer;
}
.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-xl);
}
.service-card .icon { font-size: 52px; display:block; margin-bottom:16px; }
.service-card h4 { font-size:20px; font-weight:700; color:var(--color-primary); margin-bottom:8px; }
.service-card p { font-size:15px; color:var(--color-text-secondary); line-height:1.6; }

/* 流程 */
.process { background: var(--color-surface); }
.process-grid {
    display: grid;
    grid-template-columns: repeat(6,1fr);
    gap: 16px;
}
.process-step {
    text-align:center;
    padding: 28px 16px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.process-step:hover {
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}
.process-step .num {
    font-size: 28px;
    font-weight:800;
    color:var(--color-accent);
    opacity:0.2;
    display:block;
    margin-bottom:8px;
}
.process-step h4 { font-size:16px; font-weight:600; color:var(--color-primary); }
.process-step p { font-size:13px; color:var(--color-text-secondary); margin-top:4px; }

/* 案例 */
.cases { background: var(--color-bg); }
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 28px;
}
.case-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor:pointer;
}
.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}
.case-card .image {
    height: 220px;
    background: linear-gradient(135deg, #E2E8F0, #CBD5E1);
    display: flex;
    align-items:center;
    justify-content:center;
    overflow:hidden;
}
.case-card .image img {
    width:100%;
    height:100%;
    object-fit:cover;
    transition: transform 0.6s;
}
.case-card:hover .image img { transform: scale(1.05); }
.case-card .info { padding: 28px; }
.case-card .info .tag {
    display: inline-block;
    padding: 2px 16px;
    background: rgba(43,123,228,0.08);
    color: var(--color-accent);
    font-size:12px;
    font-weight:600;
    border-radius:20px;
    margin-bottom:8px;
}
.case-card .info h4 { font-size:20px; font-weight:700; color:var(--color-primary); }
.case-card .info p { font-size:15px; color:var(--color-text-secondary); line-height:1.6; margin-top:4px; }
.case-card .info .link {
    display: inline-block;
    margin-top:12px;
    color:var(--color-accent);
    font-weight:600;
    font-size:14px;
}
.case-card .info .link::after { content:' →'; transition:var(--transition); }
.case-card .info .link:hover::after { margin-left:6px; }

/* 新闻 */
.news { background: var(--color-surface); }
.news-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 28px;
}
.news-card {
    background: var(--color-bg);
    padding: 32px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    cursor:pointer;
}
.news-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}
.news-card .date {
    font-size:14px;
    color: var(--color-accent);
    font-weight:600;
    display:block;
    margin-bottom:8px;
}
.news-card h4 {
    font-size:20px;
    font-weight:700;
    color:var(--color-primary);
    margin-bottom:8px;
    line-height:1.4;
}
.news-card .summary {
    font-size:15px;
    color:var(--color-text-secondary);
    line-height:1.7;
    margin-bottom:12px;
}
.news-card .link {
    color:var(--color-accent);
    font-weight:600;
    font-size:14px;
}
.news-card .link::after { content:' →'; transition:var(--transition); }
.news-card .link:hover::after { margin-left:6px; }

/* 合作伙伴 */
.partners { background: var(--color-bg); }
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6,1fr);
    gap: 20px;
}
.partner-item {
    height: 80px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    display:flex;
    align-items:center;
    justify-content:center;
    color: var(--color-text-secondary);
    font-weight:500;
    font-size:14px;
    transition: var(--transition);
    padding:8px;
}
.partner-item:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.partner-item img { max-height:60px; max-width:100%; object-fit:contain; }

/* 联系 */
.contact { background: var(--color-surface); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
}
.contact-info h4 {
    font-size:28px;
    font-weight:700;
    color:var(--color-primary);
    margin-bottom:24px;
}
.contact-item {
    display:flex;
    align-items:center;
    gap:16px;
    margin-bottom:20px;
    color:var(--color-text-secondary);
    font-size:16px;
}
.contact-item .icon {
    width:48px;
    height:48px;
    background: rgba(43,123,228,0.06);
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:22px;
    flex-shrink:0;
}
.contact-form {
    background: var(--color-bg);
    padding: 40px;
    border-radius: var(--radius-md);
}
.contact-form .form-row {
    display: grid;
    grid-template-columns:1fr 1fr;
    gap:16px;
}
.contact-form input,
.contact-form textarea {
    width:100%;
    padding: 14px 18px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size:15px;
    font-family:var(--font-sans);
    transition:var(--transition);
    background:#fff;
    margin-bottom:16px;
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline:none;
    border-color:var(--color-accent);
    box-shadow:0 0 0 4px rgba(43,123,228,0.08);
}

/* 页脚 */
.footer {
    background: var(--color-primary);
    color: rgba(255,255,255,0.5);
    padding: 60px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom:32px;
}
.footer-col h5 {
    color:#fff;
    font-size:18px;
    font-weight:700;
    margin-bottom:16px;
}
.footer-col p { font-size:14px; line-height:1.8; }
.footer-col ul li {
    margin-bottom:8px;
    font-size:14px;
}
.footer-col ul a:hover { color: var(--color-accent-light); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top:16px;
    display:flex;
    justify-content:space-between;
    font-size:13px;
}
.footer-bottom a { color: rgba(255,255,255,0.3); }
.footer-bottom a:hover { color: var(--color-accent-light); }

/* 返回顶部 */
.back-top {
    position:fixed;
    bottom:30px;
    right:30px;
    width:48px;
    height:48px;
    border-radius:50%;
    background: var(--color-accent);
    color:#fff;
    border:none;
    font-size:20px;
    cursor:pointer;
    box-shadow: 0 4px 20px rgba(43,123,228,0.3);
    opacity:0;
    visibility:hidden;
    transition:var(--transition);
    z-index:999;
    display:flex;
    align-items:center;
    justify-content:center;
}
.back-top.show { opacity:1; visibility:visible; }
.back-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(43,123,228,0.45);
}

/* 内页通用 */
.page-header {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, #0B1E3A, #1A3B6B);
    color:#fff;
    text-align:center;
}
.page-header h2 {
    font-size:42px;
    font-weight:800;
    font-family:var(--font-serif);
}
.page-header .sub {
    font-size:14px;
    letter-spacing:4px;
    color:rgba(255,255,255,0.3);
    text-transform:uppercase;
    margin-top:4px;
}
.detail-section {
    background: var(--color-bg);
    padding: 48px 0 72px;
}
.detail-wrapper {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap:32px;
}
.detail-content {
    background: var(--color-surface);
    padding:40px;
    border-radius:var(--radius-md);
    box-shadow:var(--shadow-sm);
}
.detail-meta {
    display:flex;
    gap:16px;
    color:var(--color-text-secondary);
    font-size:14px;
    margin-bottom:12px;
}
.detail-meta .cat { color:var(--color-accent); font-weight:500; }
.detail-title {
    font-size:30px;
    font-weight:800;
    color:var(--color-primary);
    margin-bottom:20px;
    padding-bottom:16px;
    border-bottom:1px solid var(--color-border);
}
.detail-body { color:var(--color-text-secondary); font-size:16px; line-height:2; }
.detail-body p { margin-bottom:16px; }
.detail-footer {
    display:flex;
    gap:16px;
    margin-top:32px;
    padding-top:20px;
    border-top:1px solid var(--color-border);
}
.detail-sidebar {
    position:sticky;
    top:100px;
    height:fit-content;
}
.sidebar-widget {
    background: var(--color-surface);
    padding:24px;
    border-radius:var(--radius-md);
    margin-bottom:20px;
    box-shadow:var(--shadow-sm);
}
.sidebar-widget h4 {
    font-size:18px;
    font-weight:700;
    color:var(--color-primary);
    margin-bottom:16px;
    padding-bottom:10px;
    border-bottom:2px solid var(--color-accent);
    display:inline-block;
}
.sidebar-widget ul li {
    padding:10px 0;
    border-bottom:1px solid var(--color-border);
    font-size:14px;
    color:var(--color-text-secondary);
}
.sidebar-widget ul li:last-child { border-bottom:none; }
.sidebar-widget ul li a:hover { color:var(--color-accent); }

/* 产品中心 */
.product-main { padding: 40px 0 72px; }
.product-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap:32px;
}
.product-sidebar { position:sticky; top:100px; height:fit-content; }
.product-sidebar .sidebar-title {
    display:flex;
    align-items:center;
    gap:8px;
    font-weight:700;
    font-size:16px;
    color:var(--color-primary);
    margin-bottom:16px;
}
.category-tree li { margin-bottom:2px; }
.category-tree a {
    display:block;
    padding:10px 14px;
    border-radius:var(--radius-sm);
    font-size:14px;
    color:var(--color-text-secondary);
    transition:var(--transition);
}
.category-tree a:hover,
.category-tree a.active {
    background:rgba(43,123,228,0.06);
    color:var(--color-accent);
}
.product-toolbar {
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:24px;
    flex-wrap:wrap;
    gap:12px;
}
.current-cat {
    font-size:20px;
    font-weight:700;
    color:var(--color-primary);
}
.product-search input {
    padding:10px 18px;
    border:1px solid var(--color-border);
    border-radius:var(--radius-sm);
    font-size:14px;
    font-family:var(--font-sans);
    width:220px;
    transition:var(--transition);
}
.product-search input:focus {
    outline:none;
    border-color:var(--color-accent);
    box-shadow:0 0 0 4px rgba(43,123,228,0.08);
}
.products-grid {
    display: grid;
    grid-template-columns: repeat(2,1fr);
    gap:28px;
}
.product-item {
    background: var(--color-surface);
    border-radius:var(--radius-md);
    overflow:hidden;
    border:1px solid var(--color-border);
    transition:var(--transition);
}
.product-item:hover {
    transform:translateY(-6px);
    box-shadow:var(--shadow-xl);
    border-color:var(--color-accent);
}
.product-item .product-img {
    height:200px;
    background:var(--color-bg);
    display:flex;
    align-items:center;
    justify-content:center;
    overflow:hidden;
}
.product-item .product-img img {
    width:100%;
    height:100%;
    object-fit:cover;
}
.product-item .product-info { padding:24px; }
.product-item .product-info h4 {
    font-size:20px;
    font-weight:700;
    color:var(--color-primary);
}
.product-item .product-tags {
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    margin:8px 0;
}
.product-item .product-tag {
    padding:2px 16px;
    background:rgba(43,123,228,0.06);
    color:var(--color-accent);
    border-radius:20px;
    font-size:12px;
}
.product-item .product-desc {
    font-size:15px;
    color:var(--color-text-secondary);
    line-height:1.6;
}

/* 响应式 */
@media (max-width:1024px) {
    .adv-grid { grid-template-columns:repeat(2,1fr); }
    .services-grid { grid-template-columns:repeat(2,1fr); }
    .process-grid { grid-template-columns:repeat(3,1fr); }
    .product-grid { grid-template-columns:repeat(2,1fr); }
    .cases-grid { grid-template-columns:repeat(2,1fr); }
    .news-grid { grid-template-columns:repeat(2,1fr); }
    .partners-grid { grid-template-columns:repeat(3,1fr); }
}
@media (max-width:768px) {
    .nav { display:none; }
    .mobile-menu-btn { display:block; }
    .hero-text h1 { font-size:40px; }
    .hero-text .sub { font-size:17px; }
    .hero-text .actions { flex-direction:column; align-items:stretch; }
    .metrics-inner { grid-template-columns:repeat(2,1fr); }
    .section-title { font-size:32px; }
    .adv-grid { grid-template-columns:1fr; }
    .services-grid { grid-template-columns:1fr; }
    .process-grid { grid-template-columns:repeat(2,1fr); }
    .cases-grid { grid-template-columns:1fr; }
    .news-grid { grid-template-columns:1fr; }
    .partners-grid { grid-template-columns:repeat(2,1fr); }
    .contact-grid { grid-template-columns:1fr; gap:32px; }
    .footer-grid { grid-template-columns:1fr 1fr; }
    .detail-wrapper { grid-template-columns:1fr; }
    .detail-sidebar { position:static; }
    .product-layout { grid-template-columns:1fr; }
    .product-sidebar { position:static; }
    .products-grid { grid-template-columns:1fr; }
    .about-grid { grid-template-columns:1fr; gap:32px; }
    .about-stats { grid-template-columns:repeat(2,1fr); }
    .header { padding:0 16px; }
    .container { padding:0 16px; }
}
@media (max-width:480px) {
    .hero-text h1 { font-size:30px; }
    .metric-item .number { font-size:28px; }
    .footer-grid { grid-template-columns:1fr; }
    .contact-form { padding:24px; }
    .contact-form .form-row { grid-template-columns:1fr; }
}