/*
 * 浙江宏扬纺织科技有限公司「科技织造」视觉系统
 * 结构：变量与重置 -> 布局 -> 组件 -> 模块 -> 响应式
 */

:root {
    /* 色彩系统 */
    --color-primary: #3730A3;          /* 科技靛蓝 */
    --color-primary-dark: #1E1B4B;     /* 深靛蓝 */
    --color-secondary: #94A3B8;        /* 纤维银 */
    --color-secondary-dark: #64748B;
    --color-accent: #F97316;           /* 功能橙 */
    --color-surface: #FFFFFF;
    --color-surface-alt: #F6F7FB;
    --color-text: #0F172A;
    --color-text-light: #FFFFFF;
    --color-muted: #6B7280;
    --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-card: 0 20px 45px rgba(8, 15, 30, 0.12);
    --border-radius: 24px;
    --border-radius-sm: 14px;
    --spacing-unit: 1rem;
    --max-width: 1200px;
    --grid-gap: 1.5rem;
}

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

body {
    font-family: 'Source Han Sans', 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-surface-alt);
    line-height: 1.7;
    min-height: 100vh;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: 0.08em;
}

.section-subtitle {
    color: var(--color-muted);
    max-width: 720px;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-muted); }
.mb-sm { margin-bottom: 0.75rem; }
.mb-md { margin-bottom: 1.5rem; }
.mb-lg { margin-bottom: 2.5rem; }
.mt-lg { margin-top: 2.5rem; }
.mt-xl { margin-top: 4rem; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.75rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(120deg, #4C1D95, var(--color-primary));
    color: var(--color-text-light);
    box-shadow: 0 20px 40px rgba(55, 48, 163, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
}

.btn-outline {
    border-color: rgba(55, 48, 163, 0.4);
    color: var(--color-primary);
    background: transparent;
}

.btn-outline:hover {
    background: rgba(55, 48, 163, 0.08);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-light);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    font-size: 0.85rem;
    background: rgba(249, 115, 22, 0.1);
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.card {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(148, 163, 184, 0.2);
    pointer-events: none;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--grid-gap);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--grid-gap);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--grid-gap);
}

/* ========== 顶部导航 ========== */
.header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.05);
}

.navbar {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
    letter-spacing: 0.08em;
}

.menu-toggle {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
}

.nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    padding: 0.35rem 0.5rem;
    font-weight: 500;
    color: var(--color-text);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.3rem;
    width: 100%;
    height: 2px;
    background: linear-gradient(120deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transform: translateY(4px);
    transition: all 0.3s ease;
}

.nav-item:hover .nav-link::after,
.nav-link.active::after {
    opacity: 1;
    transform: translateY(0);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    list-style: none;
    background: var(--color-surface);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    box-shadow: var(--shadow-card);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.dropdown-menu a {
    display: block;
    padding: 0.35rem 0.25rem;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.dropdown-menu a:hover {
    color: var(--color-primary);
}

/* ========== 首页视觉 ========== */
.hero {
    min-height: 90vh;
    position: relative;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 20% 20%, rgba(249, 115, 22, 0.2), transparent),
                url('../images/product_yarn_macro_3.png') center/cover fixed;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.95), rgba(55, 48, 163, 0.65));
}

.hero-content {
    position: relative;
    color: var(--color-text-light);
    display: grid;
    gap: 2rem;
}

.hero-kpi {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
}

.hero-kpi span {
    font-size: 2.5rem;
    font-weight: 700;
}

.micro-visual {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    min-height: 360px;
}

.micro-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.fiber-lens {
    position: absolute;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.6);
    pointer-events: none;
    background-image: url('../images/product_yarn_macro_4.png');
    background-size: cover;
    background-position: center;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
    mix-blend-mode: screen;
    transition: transform 0.2s ease-out;
    transform: translate(40px, 40px);
}

.tech-band {
    margin-top: -4rem;
    background: var(--color-surface);
    border-radius: var(--border-radius);
    padding: 2rem 3rem;
    box-shadow: var(--shadow-soft);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.tech-band strong {
    font-size: 1.75rem;
    color: var(--color-primary);
}

.texture-section {
    background-image: linear-gradient(120deg, rgba(148, 163, 184, 0.12) 25%, transparent 25%),
                      linear-gradient(300deg, rgba(148, 163, 184, 0.12) 25%, transparent 25%),
                      linear-gradient(90deg, rgba(55, 48, 163, 0.08), transparent);
    background-size: 40px 40px;
    transition: background-position 0.2s ease-out;
}

/* ========== 技术亮点与产品矩阵 ========== */
.radar-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--grid-gap);
    align-items: center;
}

.radar-chart {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-card);
}

.radar-chart svg {
    width: 100%;
    height: 280px;
}

.radar-chart polygon {
    fill: rgba(55, 48, 163, 0.2);
    stroke: rgba(55, 48, 163, 0.6);
    stroke-width: 2;
    transform-origin: 50% 50%;
    animation: radarPulse 6s ease-in-out infinite;
}

.radar-chart circle {
    fill: none;
    stroke: rgba(148, 163, 184, 0.3);
}

@keyframes radarPulse {
    0% { transform: scale(0.92); opacity: 0.7; }
    50% { transform: scale(1); opacity: 1; }
    100% { transform: scale(0.92); opacity: 0.7; }
}

.radar-legend {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.radar-legend li {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.legend-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
}

.matrix-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: var(--grid-gap);
    margin-top: 3rem;
}

.matrix-card {
    padding: 1.75rem;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(55, 48, 163, 0.1);
    position: relative;
    overflow: hidden;
}

.matrix-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    mix-blend-mode: multiply;
    opacity: 0.18;
}

.matrix-card h4 {
    position: relative;
    margin-bottom: 0.5rem;
}

/* ========== 研发与实验室 ========== */
.rd-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--grid-gap);
    margin-top: 2.5rem;
}

.rd-card {
    background: var(--color-primary-dark);
    color: var(--color-text-light);
    border-radius: var(--border-radius);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.rd-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/rd_lab_equipment_3.png') center/cover;
    opacity: 0.25;
    mix-blend-mode: screen;
}

.rd-card > * {
    position: relative;
}

.lab-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.lab-gallery img {
    border-radius: 20px;
    height: 220px;
    object-fit: cover;
}

/* ========== 应用领域 ========== */
.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.application-card {
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.application-card img {
    height: 160px;
    object-fit: cover;
    border-radius: 16px;
    margin-bottom: 1rem;
}

.partner-logos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    align-items: center;
    text-align: center;
}

.partner-logos img {
    opacity: 0.7;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.partner-logos img:hover {
    opacity: 1;
    transform: translateY(-4px);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--grid-gap);
}

.news-meta {
    font-size: 0.9rem;
    color: var(--color-muted);
    margin-bottom: 0.8rem;
}

.case-card {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    background: var(--color-surface);
}

.case-card img {
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    height: 200px;
    object-fit: cover;
}

.case-card .content {
    padding: 1.5rem;
}

.job-card {
    border-left: 4px solid var(--color-primary);
}

.job-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.contact-map {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.list-check {
    list-style: none;
    display: grid;
    gap: 0.6rem;
}

.list-check li::before {
    content: '▸';
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.highlight-panel {
    background: linear-gradient(135deg, rgba(55, 48, 163, 0.1), rgba(249, 115, 22, 0.08));
    border-radius: var(--border-radius);
    padding: 2rem;
}

.split-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--grid-gap);
    align-items: center;
}

.quote-block {
    font-size: 1.2rem;
    font-style: italic;
    border-left: 3px solid var(--color-accent);
    padding-left: 1.5rem;
}

/* ========== 内页共用组件 ========== */
.page-hero {
    padding: 6rem 0 4rem;
    background: linear-gradient(135deg, rgba(55, 48, 163, 0.95), rgba(15, 23, 42, 0.85));
    color: var(--color-text-light);
}

.breadcrumb {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    margin-top: 1rem;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.9);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--grid-gap);
}

.info-card {
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.timeline {
    border-left: 2px solid rgba(55, 48, 163, 0.3);
    margin-top: 2rem;
    padding-left: 2rem;
}

.timeline-item {
    margin-bottom: 1.5rem;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    background: var(--color-surface);
    left: -2.9rem;
    top: 0.4rem;
}

.data-panel {
    border-radius: var(--border-radius);
    padding: 2rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th,
.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
    text-align: left;
}

.news-filter {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.news-card {
    border-radius: var(--border-radius-sm);
    background: var(--color-surface);
    padding: 1.75rem;
    box-shadow: var(--shadow-soft);
}

.case-grid,
.career-grid,
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--grid-gap);
}

.job-card,
.case-card,
.contact-card {
    padding: 2rem;
    border-radius: var(--border-radius);
    background: var(--color-surface);
    box-shadow: var(--shadow-soft);
}

.contact-card h4 {
    margin-bottom: 0.5rem;
}

.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 0;
}

.footer a {
    color: rgba(255, 255, 255, 0.85);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.floating-cta {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 100;
    background: var(--color-accent);
    color: var(--color-text-light);
    padding: 0.9rem 1.4rem;
    border-radius: 999px;
    box-shadow: 0 15px 35px rgba(249, 115, 22, 0.3);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .navbar {
        flex-wrap: wrap;
    }
    .nav-menu {
        flex-wrap: wrap;
        justify-content: flex-end;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }
    .menu-toggle {
        display: block;
    }
    .nav-menu {
        flex-direction: column;
        width: 100%;
        display: none;
    }
    .nav-menu.active {
        display: flex;
        background: rgba(255, 255, 255, 0.95);
        padding: 1rem 0;
    }
    .dropdown-menu {
        position: relative;
        top: 0;
        box-shadow: none;
        padding-left: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
    }
    .hero {
        min-height: 70vh;
    }
    .tech-band {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .section {
        padding: 4rem 0;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 1.9rem;
    }
    .fiber-lens {
        display: none;
    }
}