/* 
   福达未来® 官方网站视觉设计系统 
   配色规范：
   - 品牌主色：深海军蓝 #071b4a / #0d3b75 (权威、工业、稳健)
   - 品牌辅色：工程蓝 #1747a8 / #00a0e9 (电力、科技、现代)
   - 品牌强调色：活力红 #e43b3b / #d32f2f (醒目、行动引导、LOGO同款红)
   - 背景浅色：#f4f7fb / #eaf2fb
   - 线条与边框：#dfe5ef / #cbd7ed
*/

:root {
    --navy-dark: #071b4a;
    --navy: #0d3b75;
    --blue-eng: #1747a8;
    --blue-cyan: #00a0e9;
    --red: #e43b3b;
    --red-hover: #c92a2a;
    --text-main: #10213f;
    --text-muted: #566a85;
    --bg-light: #f4f7fb;
    --bg-subtle: #eaf2fb;
    --line: #dfe5ef;
    --white: #ffffff;
    --radius: 6px;
    --shadow-sm: 0 2px 8px rgba(7, 27, 74, 0.06);
    --shadow-md: 0 8px 24px rgba(7, 27, 74, 0.10);
    --shadow-lg: 0 16px 40px rgba(7, 27, 74, 0.14);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--blue-eng);
    text-decoration: none;
    transition: all 0.25s ease;
}

a:hover {
    color: var(--red);
}

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

.wrap {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部信息条 */
.topline {
    background-color: var(--navy-dark);
    color: #cbd7ed;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.topline-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.topline .dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: var(--red);
    border-radius: 50%;
    margin-right: 6px;
}

.topline-links span {
    margin-left: 20px;
}

.topline a {
    color: #fff;
    font-weight: bold;
}

.topline a:hover {
    color: var(--blue-cyan);
}

/* 导航栏 */
.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.brand-logo {
    height: 52px;
    width: auto;
    object-fit: contain;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-text strong {
    font-size: 22px;
    font-weight: 900;
    color: var(--navy-dark);
    line-height: 1.1;
    letter-spacing: 0.5px;
}

.brand-text small {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 1px;
}

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

.nav a {
    color: var(--navy-dark);
    font-size: 16px;
    font-weight: 600;
    padding: 8px 0;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--red);
    transition: width 0.25s ease;
    border-radius: 2px;
}

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

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.nav-cta {
    background-color: var(--red) !important;
    color: var(--white) !important;
    padding: 10px 20px !important;
    border-radius: var(--radius);
    font-size: 14px !important;
    font-weight: 700 !important;
    box-shadow: 0 4px 12px rgba(228, 59, 59, 0.3);
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background-color: var(--red-hover) !important;
    transform: translateY(-2px);
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.menu-btn span {
    display: block;
    width: 26px;
    height: 3px;
    background-color: var(--navy-dark);
    border-radius: 2px;
}

/* 按钮规范 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 16px;
    font-weight: 700;
    border-radius: var(--radius);
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
    gap: 8px;
}

.btn-red {
    background-color: var(--red);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(228, 59, 59, 0.35);
}

.btn-red:hover {
    background-color: var(--red-hover);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(228, 59, 59, 0.45);
}

.btn-navy {
    background-color: var(--navy);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(13, 59, 117, 0.3);
}

.btn-navy:hover {
    background-color: var(--navy-dark);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-light {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(8px);
}

.btn-light:hover {
    background-color: var(--white);
    color: var(--navy-dark);
    border-color: var(--white);
}

/* 页面通用段落与标题 */
.section {
    padding: 80px 0;
}

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

.section-head {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
}

.eyebrow {
    font-size: 13px;
    font-weight: 800;
    color: var(--red);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.section-head h2 {
    font-size: 36px;
    color: var(--navy-dark);
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.3;
}

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

/* 首页 Hero 区域 */
.hero {
    position: relative;
    background: linear-gradient(135deg, #071b4a 0%, #0d3b75 60%, #1747a8 100%);
    color: var(--white);
    padding: 100px 0 110px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.6;
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-kicker {
    display: inline-block;
    background: rgba(228, 59, 59, 0.2);
    border: 1px solid rgba(228, 59, 59, 0.5);
    color: #ff8b8b;
    padding: 6px 14px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero h1 em {
    font-style: normal;
    color: #ff8080;
    border-bottom: 4px solid var(--red);
}

.hero-lead {
    font-size: 18px;
    color: #cbd7ed;
    line-height: 1.7;
    margin-bottom: 35px;
    max-width: 620px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 25px;
}

.stat-item b {
    display: block;
    font-size: 28px;
    font-weight: 900;
    color: #fff;
}

.stat-item span {
    font-size: 13px;
    color: #9ab2d6;
}

/* Hero 右侧展板 */
.hero-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 30px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-lg);
}

.hero-card-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.hero-card-header h3 {
    font-size: 20px;
    color: #fff;
    font-weight: 700;
}

.hero-card-header span {
    font-size: 13px;
    color: #9ab2d6;
}

.hero-card-list li {
    list-style: none;
    margin-bottom: 16px;
    display: flex;
    gap: 12px;
}

.hero-card-list .badge {
    background: var(--red);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
    white-space: nowrap;
    align-self: flex-start;
}

.hero-card-list strong {
    display: block;
    color: #fff;
    font-size: 15px;
}

.hero-card-list p {
    font-size: 13px;
    color: #cbd7ed;
    margin-top: 2px;
}

/* 核心优势板块 */
.values-banner {
    background: var(--navy-dark);
    color: #fff;
    padding: 24px 0;
    border-bottom: 3px solid var(--red);
}

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

.value-box h3 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.value-box h3 em {
    font-style: normal;
    color: var(--red);
    font-weight: 900;
}

.value-box p {
    font-size: 14px;
    color: #cbd7ed;
}

/* 产品网格卡片 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

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

.product-thumb {
    height: 220px;
    background-color: #f0f4f8;
    position: relative;
    overflow: hidden;
}

.product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-thumb img {
    transform: scale(1.05);
}

.product-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--red);
    color: #fff;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 700;
    border-radius: 4px;
}

.product-body {
    padding: 24px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-body h3 {
    font-size: 20px;
    color: var(--navy-dark);
    margin-bottom: 8px;
    font-weight: 800;
}

.product-spec {
    font-size: 13px;
    color: var(--red);
    font-weight: 600;
    margin-bottom: 12px;
}

.product-body p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.product-meta {
    border-top: 1px solid var(--line);
    padding-top: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

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

.product-meta a {
    font-weight: 700;
    color: var(--blue-eng);
}

/* 参数与资质表格规范 */
.data-table-wrap {
    overflow-x: auto;
    margin: 25px 0;
    background: #fff;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--line);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
}

.data-table th {
    background-color: var(--navy-dark);
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
}

.data-table tr:nth-child(even) {
    background-color: #f9fbfd;
}

.data-table tr:hover {
    background-color: #eef4fc;
}

/* 资质证书画廊 */
.cert-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.cert-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--red);
}

.cert-thumb {
    height: 240px;
    background: #f8fafc;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-thumb img {
    max-height: 100%;
    width: auto;
    object-fit: contain;
}

.cert-card h4 {
    font-size: 15px;
    color: var(--navy-dark);
    margin-bottom: 6px;
}

.cert-card p {
    font-size: 12px;
    color: var(--text-muted);
}

/* 资讯与GEO文章网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

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

.news-thumb {
    height: 180px;
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-thumb img {
    transform: scale(1.05);
}

.news-body {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.news-date {
    font-size: 12px;
    color: var(--red);
    font-weight: 700;
    margin-bottom: 8px;
}

.news-body h3 {
    font-size: 18px;
    color: var(--navy-dark);
    line-height: 1.4;
    margin-bottom: 10px;
    font-weight: 700;
}

.news-body p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
    flex-grow: 1;
}

/* FAQ 问答样式 */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-left: 4px solid var(--red);
    border-radius: 6px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.faq-item h4 {
    font-size: 17px;
    color: var(--navy-dark);
    margin-bottom: 10px;
    font-weight: 700;
}

.faq-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* CTA 转换引导条 */
.cta-banner {
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--blue-eng) 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
    position: relative;
    border-top: 3px solid var(--red);
}

.cta-banner h2 {
    font-size: 32px;
    margin-bottom: 12px;
    font-weight: 900;
}

.cta-banner p {
    font-size: 17px;
    color: #cbd7ed;
    margin-bottom: 28px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background-color: #051335;
    color: #cbd7ed;
    padding: 70px 0 0;
    font-size: 14px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h3 {
    color: #fff;
    font-size: 17px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
    font-weight: 700;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--red);
}

.footer-desc {
    font-size: 13px;
    line-height: 1.7;
    margin: 15px 0 20px;
    color: #9ab2d6;
}

.footer-badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-badge-list .badge {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #cbd7ed;
    padding: 3px 8px;
    font-size: 11px;
    border-radius: 3px;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #9ab2d6;
    font-size: 13px;
}

.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-contact p {
    margin-bottom: 10px;
    font-size: 13px;
    line-height: 1.6;
}

.footer-contact a {
    color: #fff;
    font-weight: bold;
}

.footer-bottom {
    background-color: #030b20;
    padding: 20px 0;
    font-size: 12px;
    color: #7187a8;
}

.footer-bottom-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom a {
    color: #9ab2d6;
}

/* 内页 Page Hero */
.page-hero {
    background: linear-gradient(135deg, #071b4a 0%, #1747a8 100%);
    color: #fff;
    padding: 70px 0;
    position: relative;
    border-bottom: 3px solid var(--red);
}

.page-hero h1 {
    font-size: 38px;
    font-weight: 900;
    margin-bottom: 12px;
}

.page-hero p {
    font-size: 16px;
    color: #cbd7ed;
    max-width: 700px;
}

/* 响应式断点 */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .products-grid,
    .news-grid,
    .cert-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .values-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .menu-btn {
        display: flex;
    }
    .nav {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--line);
        gap: 15px;
    }
    .nav.open {
        display: flex;
    }
    .hero h1 {
        font-size: 32px;
    }
    .products-grid,
    .news-grid,
    .cert-gallery,
    .faq-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

.brochure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.brochure-card{background:#fff;border:1px solid var(--line);padding:10px;border-radius:6px;box-shadow:var(--shadow-sm)}.brochure-card img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:top;background:#eef4fc}.brochure-card figcaption{padding:10px 4px 4px;display:flex;gap:8px;flex-direction:column}.brochure-card figcaption b{color:var(--red);font-size:13px}.brochure-card figcaption span{color:var(--navy-dark);font-size:14px}@media(max-width:992px){.brochure-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:720px){.brochure-grid{grid-template-columns:repeat(2,1fr)}}

.evidence-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}@media(max-width:992px){.evidence-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:720px){.evidence-grid{grid-template-columns:repeat(2,1fr)}}

.philosophy-section{background:#fff}.philosophy-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:30px}.philosophy-grid div{border:1px solid var(--line);border-top:3px solid var(--blue-eng);padding:20px;background:#f8fbff}.philosophy-grid b,.philosophy-grid span{display:block}.philosophy-grid b{font-size:22px;color:var(--red);margin-bottom:6px}.philosophy-grid span{font-size:14px;color:var(--text-muted)}.philosophy-image{max-height:420px;width:100%;object-fit:contain;background:#f4f7fb;border:1px solid var(--line)}.project-list{columns:4;column-gap:30px;padding-left:20px}.project-list li{break-inside:avoid;color:var(--text-muted);font-size:14px;margin:0 0 9px}.project-list li::marker{color:var(--red)}@media(max-width:992px){.philosophy-grid{grid-template-columns:repeat(2,1fr)}.project-list{columns:3}}@media(max-width:720px){.philosophy-grid{grid-template-columns:1fr}.project-list{columns:2}}