/* ===== 基础重置与变量 ===== */
:root {
    --primary: #ee211c;
    --primary-dark: #c41a16;
    --accent: #0a84ff;
    --accent-light: #4da6ff;
    --dark-bg: #0a0e1a;
    --dark-surface: #111827;
    --dark-card: #1a2332;
    --light-bg: #f8f9fc;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --border-glow: rgba(10, 132, 255, 0.3);
    --gradient-primary: linear-gradient(135deg, #ee211c 0%, #ff6b35 100%);
    --gradient-tech: linear-gradient(135deg, #0a84ff 0%, #6366f1 100%);
    --gradient-dark: linear-gradient(180deg, #0a0e1a 0%, #1a1f2e 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 顶部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    height: 70px;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    text-decoration: none;
}

.logo-text {
    font-size: 24px;
    font-weight: 900;
    color: var(--primary);
}

.logo-sub {
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.hotline {
    color: var(--text-secondary);
    font-size: 13px;
}

.btn-scheme {
    background: var(--primary);
    color: #fff;
    padding: 8px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 13px;
    transition: background 0.3s;
}

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

/* ===== Banner ===== */
.banner {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--dark-bg);
}

.banner-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(10, 132, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(10, 132, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.particles {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(10, 132, 255, 0.08) 0%, transparent 70%);
}

.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 120px 20px 80px;
}

.banner-badge {
    display: inline-block;
    background: rgba(10, 132, 255, 0.15);
    border: 1px solid rgba(10, 132, 255, 0.3);
    color: var(--accent-light);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 13px;
    margin-bottom: 30px;
    letter-spacing: 1px;
}

.banner h1 {
    font-size: 52px;
    font-weight: 900;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

.banner-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 50px;
}

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

.stat-num {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.banner-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-primary {
    display: inline-block;
    background: var(--gradient-primary);
    color: #fff;
    padding: 14px 36px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(238, 33, 28, 0.3);
}

.btn-outline {
    display: inline-block;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    padding: 14px 36px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 15px;
    transition: all 0.3s;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent-light);
    background: rgba(10, 132, 255, 0.1);
}

.btn-large {
    padding: 16px 48px;
    font-size: 16px;
}

/* ===== 通用Section ===== */
.section {
    padding: 100px 0;
}

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

.section-header.light h2 {
    color: #fff;
}

.section-header.light p {
    color: var(--text-secondary);
}

.section-tag {
    display: inline-block;
    background: rgba(238, 33, 28, 0.1);
    color: var(--primary);
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-gray);
}

/* ===== 政策背景 ===== */
.policy-section {
    background: var(--light-bg);
}

.policy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.policy-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.policy-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.policy-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: rgba(238, 33, 28, 0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.policy-icon svg {
    width: 30px;
    height: 30px;
    color: var(--primary);
}

.policy-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.policy-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ===== 产品定位 ===== */
.product-section {
    background: var(--gradient-dark);
}

.product-section .section-tag {
    background: rgba(10, 132, 255, 0.15);
    color: var(--accent-light);
}

.product-overview {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overview-center {
    position: relative;
    z-index: 2;
}

.center-circle {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 60px rgba(238, 33, 28, 0.3);
}

.center-circle span {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    text-align: center;
    line-height: 1.4;
}

.overview-items {
    position: absolute;
    inset: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-around;
}

.overview-item {
    width: 200px;
    padding: 20px;
    background: rgba(26, 35, 50, 0.8);
    border: 1px solid rgba(10, 132, 255, 0.2);
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
}

.overview-item:hover {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(10, 132, 255, 0.2);
}

.overview-item h4 {
    color: #fff;
    font-size: 15px;
    margin-bottom: 8px;
}

.overview-item p {
    color: var(--text-secondary);
    font-size: 12px;
}

.item-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    margin: 0 auto 10px;
    box-shadow: 0 0 10px var(--accent);
}

/* ===== 系统架构 ===== */
.arch-section {
    background: #fff;
}

.arch-layers {
    max-width: 900px;
    margin: 0 auto;
}

.arch-layer {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid;
}

.layer-top {
    background: rgba(238, 33, 28, 0.03);
    border-color: rgba(238, 33, 28, 0.15);
}

.layer-mid {
    background: rgba(10, 132, 255, 0.03);
    border-color: rgba(10, 132, 255, 0.15);
}

.layer-bottom {
    background: rgba(99, 102, 241, 0.03);
    border-color: rgba(99, 102, 241, 0.15);
}

.layer-label {
    width: 80px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    flex-shrink: 0;
}

.layer-items {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    flex: 1;
}

.layer-items span {
    background: rgba(10, 14, 26, 0.05);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-gray);
}

.layer-top .layer-items span {
    background: rgba(238, 33, 28, 0.08);
    color: var(--primary);
}

.layer-mid .layer-items span {
    background: rgba(10, 132, 255, 0.08);
    color: var(--accent);
}

.layer-bottom .layer-items span {
    background: rgba(99, 102, 241, 0.08);
    color: #6366f1;
}

/* ===== 核心功能模块 ===== */
.modules-section {
    background: var(--gradient-dark);
}

.modules-section .section-tag {
    background: rgba(10, 132, 255, 0.15);
    color: var(--accent-light);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.module-card {
    position: relative;
    background: var(--dark-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 36px 28px;
    transition: all 0.3s;
    overflow: hidden;
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-tech);
    opacity: 0;
    transition: opacity 0.3s;
}

.module-card:hover {
    border-color: rgba(10, 132, 255, 0.3);
    transform: translateY(-4px);
}

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

.module-card.highlight {
    border-color: rgba(238, 33, 28, 0.3);
    background: linear-gradient(135deg, rgba(238, 33, 28, 0.05) 0%, var(--dark-card) 100%);
}

.module-card.highlight::before {
    background: var(--gradient-primary);
    opacity: 1;
}

.module-num {
    font-size: 42px;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.04);
    position: absolute;
    top: 15px;
    right: 20px;
}

.module-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
}

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

.module-card.highlight .module-icon svg {
    color: var(--primary);
}

.module-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.module-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.module-badge {
    display: inline-block;
    margin-top: 15px;
    background: rgba(238, 33, 28, 0.15);
    color: var(--primary);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 12px;
}

/* ===== 质量安全监督 ===== */
.quality-section {
    background: var(--light-bg);
}

.quality-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.quality-feature {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.quality-feature:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.qf-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--primary);
}

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

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

.qf-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
}

.qf-content ul {
    list-style: none;
    padding: 0;
}

.qf-content li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

.qf-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

/* 质量监督流程 */
.quality-flow {
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.quality-flow h3 {
    text-align: center;
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

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

.step-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 8px;
}

.flow-step span {
    font-size: 13px;
    color: var(--text-gray);
}

.flow-arrow {
    color: var(--primary);
    font-size: 20px;
    font-weight: 700;
}

/* ===== 技术优势 ===== */
.tech-section {
    background: var(--gradient-dark);
}

.tech-section .section-tag {
    background: rgba(10, 132, 255, 0.15);
    color: var(--accent-light);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tech-item {
    text-align: center;
    padding: 36px 24px;
    background: rgba(26, 35, 50, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    transition: all 0.3s;
}

.tech-item:hover {
    border-color: rgba(10, 132, 255, 0.3);
    background: rgba(10, 132, 255, 0.05);
}

.tech-icon-wrap {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: rgba(10, 132, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-icon-wrap svg {
    width: 28px;
    height: 28px;
    color: var(--accent-light);
}

.tech-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.tech-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 实施方案 ===== */
.impl-section {
    background: #fff;
}

.impl-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding-top: 20px;
}

.impl-timeline::before {
    content: '';
    position: absolute;
    top: 45px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.impl-step {
    text-align: center;
    flex: 1;
    position: relative;
}

.impl-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    position: relative;
    z-index: 2;
}

.impl-icon span {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
}

.impl-step h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.impl-step p {
    font-size: 13px;
    color: var(--text-gray);
    padding: 0 10px;
}

.impl-time {
    display: inline-block;
    margin-top: 8px;
    background: rgba(238, 33, 28, 0.08);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
}

/* ===== 成功案例 ===== */
.cases-section {
    background: var(--gradient-dark);
}

.cases-section .section-tag {
    background: rgba(10, 132, 255, 0.15);
    color: var(--accent-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}

.case-card {
    background: var(--dark-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 28px 20px;
    transition: all 0.3s;
}

.case-card:hover {
    border-color: rgba(10, 132, 255, 0.3);
    transform: translateY(-3px);
}

.case-card h4 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 10px;
}

.case-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.case-tag {
    display: inline-block;
    background: rgba(238, 33, 28, 0.12);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.certifications {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.cert-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* ===== 联系我们 ===== */
.contact-section {
    background: var(--light-bg);
    text-align: center;
}

.contact-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.contact-content p {
    font-size: 16px;
    color: var(--text-gray);
    margin-bottom: 30px;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 30px;
}

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

.contact-label {
    display: block;
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-bg);
    padding: 40px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-brand .logo-text {
    font-size: 20px;
}

.footer-brand p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-copyright p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .banner h1 {
        font-size: 38px;
    }
    
    .modules-grid,
    .quality-features,
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .policy-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .impl-timeline {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .impl-timeline::before {
        display: none;
    }
    
    .impl-step {
        flex: 0 0 calc(33.33% - 14px);
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 15px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .header-right .hotline {
        display: none;
    }
    
    .banner h1 {
        font-size: 28px;
    }
    
    .banner-stats {
        gap: 30px;
    }
    
    .stat-num {
        font-size: 24px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 26px;
    }
    
    .modules-grid,
    .quality-features,
    .tech-grid,
    .policy-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .overview-items {
        position: static;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-top: 30px;
    }
    
    .overview-item {
        width: 100%;
    }
    
    .product-overview {
        flex-direction: column;
    }
    
    .impl-step {
        flex: 0 0 calc(50% - 10px);
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .contact-info {
        flex-direction: column;
        gap: 20px;
    }
    
    .flow-steps {
        flex-direction: column;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
    
    .arch-layer {
        flex-direction: column;
        gap: 10px;
    }
    
    .layer-label {
        width: auto;
    }
}