/* ============================================
   兴宁昌瑞模具官网 - 工业风格主样式表
   配色：藏蓝 #1B3A6B + 橘黄 #E8762A
   ============================================ */

/* --- 变量定义 --- */
:root {
    --color-primary: #1B3A6B;      /* 藏蓝 */
    --color-secondary: #E8762A;    /* 橘黄 */
    --color-bg: #F5F6F8;           /* 浅灰背景 */
    --color-bg-dark: #0D1B2A;      /* 深蓝黑 */
    --color-text: #1A1A2E;         /* 深灰黑 */
    --color-text-light: #6B7280;   /* 中性灰 */
    --color-white: #FFFFFF;
    --color-border: #E5E7EB;

    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
    --font-mono: 'Roboto Mono', 'Fira Code', monospace;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    --transition: all 0.3s ease;
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
    list-style: none;
}

/* --- 工具类 --- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section-title p {
    color: var(--color-text-light);
    font-size: 1rem;
}

.section-title .line {
    width: 48px;
    height: 3px;
    background: var(--color-secondary);
    margin: 16px auto 0;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background: var(--color-secondary);
    color: var(--color-white);
    border-color: var(--color-secondary);
}

.btn-primary:hover {
    background: #d06820;
    border-color: #d06820;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.875rem;
}

/* --- 顶部导航 --- */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo img {
    height: 48px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.logo-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-tagline {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 4px 0;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: width 0.3s ease;
}

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

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

.header-cta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-phone {
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-family: var(--font-mono);
}

/* 汉堡菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

/* --- Hero区 --- */
.hero {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1B3A6B 100%);
    color: var(--color-white);
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 400"><circle cx="200" cy="200" r="180" fill="none" stroke="%231B3A6B" stroke-width="1" opacity="0.3"/></svg>') no-repeat center/contain;
    opacity: 0.4;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    background: rgba(232,118,42,0.15);
    border: 1px solid rgba(232,118,42,0.4);
    color: var(--color-secondary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero h1 span {
    color: var(--color-secondary);
}

.hero-sub {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 36px;
    max-width: 560px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

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

.hero-stat-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-secondary);
    font-family: var(--font-mono);
    display: block;
}

.hero-stat-label {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.hero-precision {
    margin-top: 48px;
    padding: 20px 24px;
    background: rgba(255,255,255,0.05);
    border-left: 3px solid var(--color-secondary);
    border-radius: var(--radius-sm);
}

.hero-precision h4 {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.hero-precision-items {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.precision-item {
    font-family: var(--font-mono);
    font-size: 0.95rem;
}

.precision-item span {
    color: var(--color-secondary);
    font-weight: 700;
    font-size: 1.1rem;
    margin-right: 6px;
}

/* --- 核心数据区 --- */
.stats-bar {
    background: var(--color-white);
    padding: 40px 0;
    border-bottom: 1px solid var(--color-border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}

.stat-item {
    padding: 16px;
}

.stat-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    font-family: var(--font-mono);
}

.stat-num span {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

/* --- 产品分类区 --- */
.products-section {
    background: var(--color-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.product-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-secondary);
}

.product-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #2a5298 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--color-white);
    fill: none;
    stroke-width: 1.5;
}

.product-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.product-card p {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* --- 实力展示区 --- */
.strength-section {
    background: var(--color-white);
}

.strength-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.strength-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.strength-images img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.strength-images img:first-child {
    grid-column: 1 / -1;
    aspect-ratio: 16/9;
}

.strength-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.strength-content p {
    color: var(--color-text-light);
    margin-bottom: 28px;
    line-height: 1.8;
}

.strength-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.strength-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.strength-item-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    background: rgba(232,118,42,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    font-size: 1rem;
}

.strength-item-text h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.strength-item-text p {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin: 0;
}

/* --- USP区 --- */
.usp-section {
    background: var(--color-bg-dark);
    color: var(--color-white);
}

.usp-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.usp-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}

.usp-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: var(--color-secondary);
    transform: translateY(-4px);
}

.usp-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    background: rgba(232,118,42,0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.usp-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.usp-card p {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.65);
    line-height: 1.7;
}

/* --- 客户案例区 --- */
.cases-section {
    background: var(--color-bg);
}

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

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

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

.case-card-thumb {
    height: 200px;
    background: linear-gradient(135deg, var(--color-primary) 0%, #2a5298 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.3);
    font-size: 3rem;
}

.case-card-body {
    padding: 24px;
}

.case-card-client {
    font-size: 0.75rem;
    color: var(--color-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.case-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.case-card p {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

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

.case-result {
    text-align: center;
    flex: 1;
}

.case-result-num {
    display: block;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-secondary);
    font-family: var(--font-mono);
}

.case-result-label {
    font-size: 0.7rem;
    color: var(--color-text-light);
}

/* --- 品牌故事区 --- */
.story-section {
    background: var(--color-white);
}

.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.story-quote {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-bg-dark) 100%);
    color: var(--color-white);
    padding: 48px 40px;
    border-radius: var(--radius-lg);
    position: relative;
}

.story-quote::before {
    content: '"';
    font-size: 6rem;
    color: var(--color-secondary);
    opacity: 0.3;
    position: absolute;
    top: -10px;
    left: 20px;
    font-family: serif;
    line-height: 1;
}

.story-quote blockquote {
    font-size: 1.1rem;
    line-height: 1.9;
    position: relative;
    z-index: 1;
    margin-bottom: 24px;
}

.story-quote cite {
    font-size: 0.875rem;
    color: var(--color-secondary);
    font-style: normal;
}

.story-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.story-content p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 24px;
}

/* --- 资讯区 --- */
.news-section {
    background: var(--color-bg);
}

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

.news-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.news-card-img {
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #e8edf2 0%, #d0d8e0 100%);
}
.news-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.news-card:hover .news-card-img img {
    transform: scale(1.05);
}
.news-card-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e8edf2 0%, #d0d8e0 100%);
}
.news-card-more {
    display: inline-block;
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--color-secondary);
    font-weight: 600;
}
.news-card:hover .news-card-more {
    color: var(--color-primary);
}

.news-card-body {
    padding: 20px;
}

.news-card-meta {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}

.news-card-tag {
    background: rgba(232,118,42,0.1);
    color: var(--color-secondary);
    font-size: 0.7rem;
    padding: 3px 10px;
    border-radius: 10px;
    font-weight: 600;
}

.news-card-date {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.news-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card h3:hover {
    color: var(--color-primary);
}

.news-card-excerpt {
    font-size: 0.8rem;
    color: var(--color-text-light);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --- 询盘CTA区 --- */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-bg-dark) 100%);
    padding: 80px 0;
    text-align: center;
    color: var(--color-white);
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
}

.cta-contacts {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.cta-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-family: var(--font-mono);
}

.cta-form {
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.cta-form input,
.cta-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.1);
    color: var(--color-white);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.cta-form input::placeholder,
.cta-form textarea::placeholder {
    color: rgba(255,255,255,0.5);
}

.cta-form input:focus,
.cta-form textarea:focus {
    border-color: var(--color-secondary);
    background: rgba(255,255,255,0.15);
}

.cta-form textarea {
    grid-column: 1 / -1;
    resize: vertical;
    min-height: 80px;
}

.cta-form .btn {
    grid-column: 1 / -1;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.footer-brand-logo {
    height: 40px;
    margin-bottom: 12px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.footer-col ul li a {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.6);
}

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

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.875rem;
    margin-bottom: 12px;
}

.footer-contact .icon {
    color: var(--color-secondary);
    min-width: 16px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 0.8rem;
}

.footer-bottom a {
    color: rgba(255,255,255,0.5);
}

.footer-bottom a:hover {
    color: var(--color-secondary);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        box-shadow: var(--shadow-md);
        padding: 16px 0;
    }

    .nav.open {
        display: flex;
    }

    .nav a {
        padding: 12px 24px;
        width: 100%;
    }

    .menu-toggle {
        display: flex;
    }

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

    .hero-stats {
        gap: 24px;
    }

    .hero-stat-num {
        font-size: 1.6rem;
    }

    .hero-btns {
        flex-direction: column;
    }

    .hero-btns .btn {
        width: 100%;
    }

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

    .strength-grid,
    .story-grid {
        grid-template-columns: 1fr 1fr;
    }

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

    .article-layout {
        grid-template-columns: 1fr 1fr;
    }

    .article-header h1 {
        font-size: 1.4rem;
    }

    .article-nav {
        flex-direction: column;
    }

    .sidebar-card {
        margin-top: 0;
    }
}
    .usp-grid {
        grid-template-columns: 1fr 1fr;
    }

    .cta-form {
        grid-template-columns: 1fr 1fr;
    }

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

    .cta-contacts {
        flex-direction: column;
        gap: 16px;
    }

    .header-phone {
        display: none;
    }

    .hero-precision-items {
        flex-direction: column;
        gap: 8px;
    }
}

/* --- 页面过渡动画 --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 辅助类 --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }

/* ========================
   页面通用
   ======================== */
.page-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #254d8a 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}
.page-hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 8px; }
.page-hero p { font-size: 1rem; opacity: 0.8; }

/* ========================
   面包屑
   ======================== */
.breadcrumb-bar {
    background: var(--color-light);
    border-bottom: 1px solid #E5E7EB;
    padding: 12px 0;
    font-size: 0.8rem;
    color: var(--color-text-light);
}
.breadcrumb-bar a { color: var(--color-text-light); text-decoration: none; }
.breadcrumb-bar a:hover { color: var(--color-secondary); }

/* ========================
   新闻列表页
   ======================== */
.news-filter {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.filter-btn {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid #E5E7EB;
    color: var(--color-text);
    text-decoration: none;
    transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--color-secondary); color: var(--color-secondary); }
.filter-btn.active {
    background: var(--color-secondary);
    color: #fff;
    border-color: var(--color-secondary);
}
.news-search {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
}
.news-search input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid #E5E7EB;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    outline: none;
}
.news-search input:focus { border-color: var(--color-secondary); }
.news-search button {
    padding: 10px 20px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
}
.news-list-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.empty-state {
    text-align: center;
    padding: 80px 0;
    color: var(--color-text-light);
}
.empty-state p { font-size: 1.1rem; margin-bottom: 20px; }

/* ========================
   文章详情页
   ======================== */
.article-page { padding: 40px 0 80px; }
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}
.article-cover {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    border-radius: var(--radius-md);
    margin-bottom: 28px;
}
.article-cover img { width: 100%; height: 100%; object-fit: cover; }
.article-header { margin-bottom: 28px; }
.article-cat {
    display: inline-block;
    background: rgba(232,118,42,0.1);
    color: var(--color-secondary);
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}
.article-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
    margin-bottom: 16px;
}
.article-meta {
    display: flex;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 16px;
}
.article-excerpt {
    font-size: 1rem;
    color: var(--color-text);
    line-height: 1.7;
    border-left: 4px solid var(--color-secondary);
    padding-left: 16px;
    margin-top: 16px;
}
.article-content {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--color-text);
}
.article-content h2, .article-content h3 {
    color: var(--color-primary);
    margin: 1.5em 0 0.6em;
    font-weight: 700;
}
.article-content p { margin-bottom: 1em; }
.article-content img { max-width: 100%; border-radius: var(--radius-sm); margin: 1em 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1em 0; }
.article-content table th, .article-content table td { border: 1px solid #E5E7EB; padding: 8px 12px; font-size: 0.9rem; }
.article-content table th { background: var(--color-light); font-weight: 600; }
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid #E5E7EB;
}
.article-nav-link {
    flex: 1;
    padding: 16px 20px;
    background: var(--color-light);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all 0.2s;
}
.article-nav-link:hover { background: rgba(27,58,107,0.08); }
.article-nav-link span { font-size: 0.75rem; color: var(--color-text-light); display: block; margin-bottom: 4px; }
.article-nav-link strong { font-size: 0.875rem; color: var(--color-text); }
.article-nav-link.next { text-align: right; }

/* ========================
   侧边栏
   ======================== */
.sidebar-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid #E5E7EB;
}
.sidebar-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-secondary);
}
.inquiry-card p { font-size: 0.85rem; color: var(--color-text-light); margin-bottom: 16px; }
.btn-full { width: 100%; text-align: center; display: block; }
.inquiry-tels { margin-top: 16px; }
.inquiry-tels p { font-size: 0.875rem; font-weight: 600; color: var(--color-primary); margin-bottom: 4px; }
.related-list { display: flex; flex-direction: column; gap: 12px; }
.related-item { display: flex; gap: 12px; text-decoration: none; }
.related-thumb { width: 70px; height: 50px; flex-shrink: 0; border-radius: 6px; overflow: hidden; background: var(--color-light); }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; }
.related-thumb-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #e8edf2, #d0d8e0); }
.related-info { flex: 1; }
.related-title { font-size: 0.8rem; color: var(--color-text); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 4px; }
.related-date { font-size: 0.7rem; color: var(--color-text-light); }
/* ========================
   应用领域模块（追加到 style.css 末尾）
   ======================== */
.applications-section { background: #F8F9FA; padding: 80px 0; }
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 40px;
}
.app-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: center;
}
.app-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
.app-card-img {
    width: 100%;
    height: 150px;
    overflow: hidden;
    background: #E5E7EB;
}
.app-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.app-card-icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1B3A6B, #2D5BA0);
}
.app-card-icon svg {
    width: 48px;
    height: 48px;
    stroke: #fff;
    fill: none;
    stroke-width: 1.5;
}
.app-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #1A1A2E;
    padding: 16px 12px 4px;
}
.app-card p {
    font-size: 0.8rem;
    color: #6B7280;
    padding: 0 12px 16px;
    line-height: 1.5;
}

/* ===== 手机端全面适配 (768px以下) ===== */
@media (max-width: 768px) {
    header > div { padding: 0 12px !important; height: 56px !important; }
    header > div > a > div { display: none !important; }
    header img { height: 28px !important; }
    header nav { gap: 6px !important; overflow-x: auto !important; flex-wrap: nowrap !important; }
    header nav a { font-size: 0.78rem !important; white-space: nowrap !important; }
    .section { padding: 40px 0 !important; }
    .container { padding: 0 16px !important; }

    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    .products-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    .applications-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    .cases-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    .news-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }

    .strength-cards { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    .strength-card div:first-child { height: 100px !important; }
    .strength-card div:nth-child(2) { padding: 14px !important; }

    .story-grid { grid-template-columns: 1fr !important; gap: 24px !important; }
    .story-quote { padding: 28px 20px !important; }

    .usp-grid { grid-template-columns: 1fr !important; gap: 16px !important; }

    .footer-grid { grid-template-columns: 1fr 1fr !important; gap: 24px !important; }
    .footer-brand { grid-column: 1 / -1 !important; }
    .footer-col:nth-child(2),
    .footer-col:nth-child(3) { display: none !important; }
    .footer-contact li { font-size: 0.8rem !important; }
    .footer-bottom { text-align: center !important; }
}

.strength-card { transition: transform 0.3s, box-shadow 0.3s; }
.strength-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.3); }
.strength-card:hover img { transform: scale(1.05); }
.strength-card img { transition: transform 0.3s; }

/* ===== 三不承诺 - 正三角布局 ===== */
.usp-triangle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 60px;
    padding: 20px 0;
    position: relative;
}
.usp-triangle::before {
    content: '';
    position: absolute;
    top: 120px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 160px solid transparent;
    border-right: 160px solid transparent;
    border-top: 140px solid rgba(255,107,0,0.15);
    pointer-events: none;
}
.usp-triangle-top { text-align: center; max-width: 420px; z-index: 1; }
.usp-triangle-bottom {
    display: flex; gap: 80px; justify-content: center;
    width: 100%; max-width: 700px; z-index: 1;
}
.usp-triangle-btm-card { text-align: center; flex: 1; max-width: 300px; }
.usp-circle {
    width: 100px; height: 100px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    border: 2px solid var(--color-secondary);
    display: flex;
    align-items: center; justify-content: center;
    margin: 0 auto 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}
.usp-circle:hover { transform: scale(1.08); box-shadow: 0 0 30px rgba(255,107,0,0.3); }
.usp-circle-icon { font-size: 2.6rem; }

@media (max-width: 768px) {
    .usp-triangle { gap: 32px; }
    .usp-triangle::before { display: none; }
    .usp-triangle-bottom { flex-direction: column; gap: 32px; align-items: center; }
    .usp-triangle-btm-card { max-width: 100%; }
    .usp-circle { width: 72px; height: 72px; }
    .usp-circle-icon { font-size: 2rem; }
}