/* ============================================
   INNOV 英诺航空科技 - 官网主样式
   现代工业风企业门户网站
   ============================================ */

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

:root {
    /* 主色调 - 科技深蓝 */
    --primary: #1a3a5c;
    --primary-dark: #0f2842;
    --primary-light: #2c5a8a;

    /* 强调色 - 工业橙 */
    --accent: #e85d04;
    --accent-dark: #c84e03;
    --accent-light: #f77f00;

    /* 中性色 */
    --bg: #f8f9fa;
    --bg-white: #ffffff;
    --text: #2d3436;
    --text-light: #636e72;
    --text-lighter: #a5a5a5;
    --border: #e1e5ea;

    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* 尺寸 */
    --max-width: 1200px;
    --header-height: 70px;
    --radius: 8px;
    --radius-lg: 16px;

    /* 过渡 */
    --transition: all 0.3s ease;
}

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 顶部导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-mark {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text .en {
    font-size: 0.7rem;
    color: var(--text-light);
    font-weight: 400;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-menu a {
    font-size: 0.95rem;
    color: var(--text);
    font-weight: 500;
    position: relative;
    padding: 8px 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.nav-cta {
    background: var(--accent);
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: var(--radius);
    font-weight: 600;
}

.nav-cta:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 600px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    color: #fff;
    overflow: hidden;
    margin-top: var(--header-height);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(232, 93, 4, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.05;
    background-image:
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero-content h1 .highlight {
    color: var(--accent-light);
}

.hero-content p {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 93, 4, 0.4);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.btn-large {
    padding: 14px 36px;
    font-size: 1.05rem;
}

/* Hero 统计数字 */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat .number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
}

.hero-stat .label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
}

/* Hero 视觉 */
.hero-visual {
    position: relative;
    height: 400px;
}

.hero-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
    color: #fff;
}

.hero-card-1 {
    top: 0;
    left: 0;
    width: 60%;
}

.hero-card-2 {
    top: 120px;
    right: 0;
    width: 55%;
}

.hero-card-3 {
    bottom: 0;
    left: 40px;
    width: 50%;
}

.hero-card .card-icon {
    width: 40px;
    height: 40px;
    background: var(--accent);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.hero-card .card-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.hero-card .card-desc {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 通用区块 ===== */
.section {
    padding: 80px 0;
}

.section-bg-white {
    background: var(--bg-white);
}

.section-bg-light {
    background: var(--bg);
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(232, 93, 4, 0.1);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 公司简介区 ===== */
.about-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-preview-text h2 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 20px;
    line-height: 1.4;
}

.about-preview-text p {
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.about-feature .icon {
    width: 36px;
    height: 36px;
    background: rgba(26, 58, 92, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.about-feature .text {
    font-size: 0.9rem;
}

.about-feature .text strong {
    display: block;
    color: var(--primary);
    margin-bottom: 2px;
}

.about-feature .text span {
    color: var(--text-light);
    font-size: 0.82rem;
}

.about-preview-visual {
    position: relative;
}

.about-image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.3);
    font-size: 3rem;
    box-shadow: var(--shadow-lg);
}

.about-image-placeholder::after {
    content: '公司照片';
    font-size: 1rem;
    margin-top: 8px;
}

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius);
    padding: 16px 24px;
    box-shadow: var(--shadow-lg);
}

.about-badge .number {
    font-size: 1.8rem;
    font-weight: 700;
}

.about-badge .label {
    font-size: 0.8rem;
    opacity: 0.9;
}

/* ===== 核心业务 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.8rem;
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
}

.service-card h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 产品展示 ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #e8ecf1, #d5dde6);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image .product-icon {
    font-size: 3.5rem;
    color: var(--primary);
    opacity: 0.3;
}

.product-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.product-info p {
    font-size: 0.88rem;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.product-specs span {
    background: var(--bg);
    color: var(--text-light);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.product-link {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-link:hover {
    gap: 10px;
}

/* ===== 应用案例 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    width: 100%;
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.4);
    font-size: 2.5rem;
}

.case-info {
    padding: 24px;
}

.case-industry {
    display: inline-block;
    padding: 3px 12px;
    background: rgba(26, 58, 92, 0.1);
    color: var(--primary);
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.case-info h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.case-info p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.case-results {
    display: flex;
    gap: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.case-result .value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
}

.case-result .label {
    font-size: 0.75rem;
    color: var(--text-lighter);
}

/* ===== 证书展示 ===== */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.cert-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.cert-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.cert-image {
    width: 100%;
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, #f0f3f7, #e1e6ed);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-lighter);
    font-size: 2rem;
    margin-bottom: 16px;
}

.cert-card h4 {
    font-size: 0.95rem;
    color: var(--primary);
    margin-bottom: 6px;
}

.cert-card p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== CTA 区域 ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    text-align: center;
    padding: 60px 0;
}

.cta-section h2 {
    font-size: 1.8rem;
    margin-bottom: 16px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 28px;
    font-size: 1.05rem;
}

/* ===== 新闻动态 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.news-date {
    padding: 16px 20px 0;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
}

.news-card h3 {
    padding: 8px 20px 12px;
    font-size: 1rem;
    color: var(--primary);
    line-height: 1.5;
}

.news-card p {
    padding: 0 20px 20px;
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.85rem;
}

.footer-contact-item .icon {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col ul li a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    margin: 0 8px;
}

/* ===== 页面横幅 ===== */
.page-banner {
    margin-top: var(--header-height);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.05;
    background-image:
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 40px 40px;
}

.page-banner h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    position: relative;
}

.page-banner p {
    color: rgba(255, 255, 255, 0.7);
    position: relative;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    position: relative;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
    color: #fff;
}

/* ===== 产品筛选 ===== */
.product-filters {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    border: 2px solid var(--border);
    background: var(--bg-white);
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(232, 93, 4, 0.05);
}

/* ===== 经销商登录 ===== */
.portal-section {
    min-height: calc(100vh - var(--header-height));
    margin-top: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 40px 20px;
    position: relative;
    overflow: hidden;
}

.portal-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.05;
    background-image:
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 40px 40px;
}

.login-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.login-card h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 8px;
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    color: var(--text);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.login-footer a {
    color: var(--accent);
    font-weight: 500;
}

/* ===== 经销商后台 ===== */
.dashboard {
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    background: var(--bg);
}

.dashboard-header {
    background: var(--bg-white);
    padding: 20px 0;
    box-shadow: var(--shadow-sm);
}

.dashboard-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-header h1 {
    font-size: 1.3rem;
    color: var(--primary);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
}

.dashboard-tabs {
    display: flex;
    gap: 0;
    background: var(--bg-white);
    padding: 0 20px;
    border-bottom: 1px solid var(--border);
    max-width: var(--max-width);
    margin: 0 auto;
}

.dashboard-tab {
    padding: 16px 24px;
    font-size: 0.95rem;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.dashboard-tab:hover {
    color: var(--primary);
}

.dashboard-tab.active {
    color: var(--primary);
    border-bottom-color: var(--accent);
    font-weight: 600;
}

.dashboard-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 30px 20px;
}

/* 搜索栏 */
.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    background: var(--bg-white);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.search-bar input,
.search-bar select {
    padding: 10px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.search-bar input {
    flex: 1;
}

.search-bar input:focus,
.search-bar select:focus {
    outline: none;
    border-color: var(--accent);
}

/* 数据表格 */
.data-table {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    overflow-x: auto;
}

.data-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.data-table th {
    background: var(--bg);
    padding: 14px 16px;
    text-align: left;
    font-size: 0.85rem;
    color: var(--text);
    font-weight: 600;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 14px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.data-table tr:hover {
    background: rgba(232, 93, 4, 0.03);
}

.stock-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 600;
}

.stock-sufficient {
    background: rgba(34, 139, 34, 0.1);
    color: #226e1b;
}

.stock-low {
    background: rgba(255, 165, 0, 0.1);
    color: #b8860b;
}

.stock-out {
    background: rgba(220, 53, 69, 0.1);
    color: #a31515;
}

.btn-small {
    padding: 6px 14px;
    font-size: 0.82rem;
    border-radius: var(--radius);
}

/* 统计卡片 */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--accent);
}

.stat-card .label {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .trend {
    font-size: 0.78rem;
    color: #226e1b;
    margin-top: 6px;
}

/* ===== 公司时间线 ===== */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 50%;
    padding-right: 40px;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 50%;
    padding-left: 40px;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 8px;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border: 4px solid var(--bg-white);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content h4 {
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.timeline-content h3 {
    color: var(--primary);
    font-size: 1rem;
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--text-light);
    font-size: 0.88rem;
}

/* ===== 联系方式 ===== */
.contact-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-item .icon {
    width: 48px;
    height: 48px;
    background: rgba(26, 58, 92, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-item .label {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-item .value {
    font-size: 1rem;
    color: var(--text);
    font-weight: 500;
}

.contact-map {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8ecf1, #d5dde6);
    color: var(--text-lighter);
    font-size: 1rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .services-grid,
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        gap: 0;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
        width: 100%;
    }

    .menu-toggle {
        display: block;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-visual {
        display: none;
    }

    .about-preview,
    .contact-section {
        grid-template-columns: 1fr;
    }

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

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

    .stats-row {
        grid-template-columns: 1fr 1fr;
    }

    .dashboard-tabs {
        overflow-x: auto;
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.6rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .services-grid,
    .certificates-grid {
        grid-template-columns: 1fr;
    }

    .stats-row {
        grid-template-columns: 1fr;
    }
}

/* ===== 电子样本中心 ===== */
.brochure-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8edf4 100%);
}

.brochure-card {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 48px;
    background: #fff;
    border-radius: 20px;
    padding: 48px;
    box-shadow: 0 20px 60px rgba(15, 35, 70, 0.12);
    max-width: 980px;
    margin: 0 auto;
    align-items: center;
}

/* 仿PDF封面效果 */
.brochure-cover {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 16px 40px rgba(15, 35, 70, 0.35);
    transform: perspective(1000px) rotateY(-6deg);
    transition: transform 0.4s ease;
}

.brochure-cover:hover {
    transform: perspective(1000px) rotateY(0deg) scale(1.03);
}

.brochure-cover-inner {
    aspect-ratio: 210/297;
    background: linear-gradient(160deg, #0f2346 0%, #1a3a6b 55%, #0f2346 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 40px 24px;
    position: relative;
}

.brochure-cover-inner::before {
    content: '';
    position: absolute;
    inset: 14px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 6px;
}

.brochure-logo {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 6px;
    color: #f5a623;
    margin-bottom: 18px;
}

.brochure-cover-inner h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: 2px;
}

.brochure-en {
    font-size: 0.72rem;
    letter-spacing: 4px;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
}

.brochure-year {
    margin-top: 28px;
    padding: 6px 18px;
    border: 1px solid rgba(245, 166, 35, 0.7);
    border-radius: 999px;
    color: #f5a623;
    font-size: 0.82rem;
    letter-spacing: 2px;
}

.brochure-info h3 {
    font-size: 1.5rem;
    color: #0f2346;
    margin-bottom: 12px;
}

.brochure-desc {
    color: #5a6b82;
    line-height: 1.8;
    margin-bottom: 20px;
}

.brochure-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 28px;
}

.brochure-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #3a4a5f;
    font-size: 0.95rem;
}

.brochure-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.brochure-note {
    font-size: 0.8rem;
    color: #8a99ad;
}

@media (max-width: 768px) {
    .brochure-card {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 28px;
    }

    .brochure-cover {
        max-width: 260px;
        margin: 0 auto;
        transform: none;
    }

    .brochure-actions .btn {
        flex: 1;
        text-align: center;
        justify-content: center;
    }
}