/*
 * Main stylesheet for Haikou Shubo Technology Official Website
 * Theme: Industrial Tech + Precision Manufacturing
 */

@import url('variables.css');

/* -------------------------------------------------------------
 * 1. Grid & Layout System
 * ------------------------------------------------------------- */
.grid-container {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--spacing-lg);
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

[class*="col-"] {
    min-width: 0;
}

.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

@media (min-width: 768px) {
    .col-md-1 { grid-column: span 1; }
    .col-md-2 { grid-column: span 2; }
    .col-md-3 { grid-column: span 3; }
    .col-md-4 { grid-column: span 4; }
    .col-md-5 { grid-column: span 5; }
    .col-md-6 { grid-column: span 6; }
    .col-md-7 { grid-column: span 7; }
    .col-md-8 { grid-column: span 8; }
    .col-md-9 { grid-column: span 9; }
    .col-md-10 { grid-column: span 10; }
    .col-md-11 { grid-column: span 11; }
    .col-md-12 { grid-column: span 12; }
}

@media (min-width: 1024px) {
    .col-lg-1 { grid-column: span 1; }
    .col-lg-2 { grid-column: span 2; }
    .col-lg-3 { grid-column: span 3; }
    .col-lg-4 { grid-column: span 4; }
    .col-lg-5 { grid-column: span 5; }
    .col-lg-6 { grid-column: span 6; }
    .col-lg-7 { grid-column: span 7; }
    .col-lg-8 { grid-column: span 8; }
    .col-lg-9 { grid-column: span 9; }
    .col-lg-10 { grid-column: span 10; }
    .col-lg-11 { grid-column: span 11; }
    .col-lg-12 { grid-column: span 12; }
}

@media (max-width: 767px) {
    .grid-container {
        padding: 0;
        gap: var(--spacing-md);
    }
    .reverse-on-mobile {
        display: flex;
        flex-direction: column-reverse;
        gap: var(--spacing-lg);
    }
    .reverse-on-mobile > [class*="col-"] {
        width: 100%;
    }
}

.content-body {
    background-color: var(--color-background-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl);
    box-shadow: var(--box-shadow-sm);
}

.img-responsive {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius-md);
}

img.rounded-md { border-radius: var(--border-radius-md); }
.shadow-sm { box-shadow: var(--box-shadow-sm); }
.shadow-md { box-shadow: var(--box-shadow-md); }

ul { padding-left: var(--spacing-lg); }
ul li { margin-bottom: var(--spacing-sm); }

/* -------------------------------------------------------------
 * 2. Navigation (Tech Header)
 * ------------------------------------------------------------- */
.tech-header,
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(5, 12, 24, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(14px);
    z-index: var(--z-index-header);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
}

.logo a {
    color: var(--color-text-light);
    font-family: var(--font-family-heading);
    font-size: 1.25rem;
    letter-spacing: 0.05em;
}

.nav-menu {
    list-style: none;
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(5, 12, 24, 0.98);
    padding: var(--spacing-lg) var(--spacing-md);
}

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

.nav-menu > li {
    position: relative;
    margin: var(--spacing-sm) 0;
}

.nav-menu > li > a {
    color: var(--color-text-light);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) 0;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: color 0.2s ease;
}

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

.nav-menu .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
}

.dropdown-menu,
.sub-dropdown-menu {
    list-style: none;
    position: absolute;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    background: var(--color-background-white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow-md);
    min-width: 200px;
    padding: var(--spacing-sm) 0;
    transition: all 0.2s ease;
    z-index: var(--z-index-dropdown);
    top: 100%;
    left: 0;
}

.dropdown-menu li a,
.sub-dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-dark);
    font-size: var(--font-size-sm);
}

.dropdown-menu li a:hover,
.sub-dropdown-menu li a:hover {
    background-color: var(--color-surface);
    color: var(--color-primary);
}

.nav-menu > li:hover > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-submenu {
    position: relative;
}

.dropdown-submenu:hover > .sub-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.sub-dropdown-menu {
    top: 0;
    left: 100%;
    transform: translateX(10px);
}

.menu-toggle {
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
}

@media (min-width: 1024px) {
    .nav-menu {
        display: flex !important;
        position: static;
        background: transparent;
        width: auto;
        padding: 0;
        gap: var(--spacing-xl);
    }
    .nav-menu > li {
        margin: 0;
    }
    .menu-toggle {
        display: none;
    }
}

/* -------------------------------------------------------------
 * 3. Buttons
 * ------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    border: 1px solid transparent;
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-lg { padding: var(--spacing-md) var(--spacing-xxl); font-size: 1.125rem; }

.btn-primary {
    background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-accent) 100%);
    color: var(--color-text-light);
    box-shadow: var(--box-shadow-sm);
}

.btn-primary:hover {
    box-shadow: var(--box-shadow-md);
    transform: translateY(-2px);
}

.btn-outline {
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--color-text-light);
}

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

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-light);
}

/* -------------------------------------------------------------
 * 4. Sections & Titles
 * ------------------------------------------------------------- */
.section {
    padding: calc(var(--spacing-xxxl) + var(--spacing-md)) 0;
    position: relative;
}

.section.compact {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--spacing-xxl);
}

.section-title h2 {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--color-text-muted);
}

/* -------------------------------------------------------------
 * 5. Hero Banner
 * ------------------------------------------------------------- */
.industrial-hero {
    position: relative;
    height: var(--hero-height);
    margin-top: var(--header-height);
    overflow: hidden;
    display: flex;
    align-items: center;
    color: var(--color-text-light);
}

.industrial-hero .hero-backdrop {
    position: absolute;
    inset: 0;
}

.industrial-hero video,
.industrial-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(120%);
}

.industrial-hero .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(2, 10, 24, 0.95), rgba(0, 102, 204, 0.65));
}

.industrial-hero .hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.industrial-hero h1 {
    color: var(--color-text-light);
    font-size: 3.5rem;
    max-width: 760px;
}

.industrial-hero p {
    font-size: 1.2rem;
    max-width: 640px;
    color: rgba(255, 255, 255, 0.85);
}

.hero-actions {
    margin-top: var(--spacing-xl);
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-stats {
    margin-top: var(--spacing-xxl);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
}

.hero-stat {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.04);
}

.hero-stat .number {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    display: block;
}

.hero-stat .label {
    font-size: var(--font-size-sm);
    letter-spacing: 0.1em;
}

@media (max-width: 767px) {
    .industrial-hero {
        height: auto;
        padding: var(--spacing-xxxl) 0;
    }
    .industrial-hero h1 {
        font-size: 2.25rem;
    }
}

/* -------------------------------------------------------------
 * 6. Cards & Data
 * ------------------------------------------------------------- */
.card,
.core-business-card,
.service-item,
.support-card,
.case-card,
.news-item,
.job-card,
.contact-info-card,
.product-category-card,
.product-item,
.decoration-card,
.ev-service-card,
.solution-card,
.car-card {
    background-color: var(--color-background-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--box-shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.core-business-card:hover,
.service-item:hover,
.support-card:hover,
.case-card:hover,
.news-item:hover,
.job-card:hover,
.contact-info-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--box-shadow-md);
}

.core-business-card img,
.service-item img,
.support-card img,
.case-card img,
.news-item img,
.product-category-card img,
.product-item img,
.decoration-card img,
.ev-service-card img,
.car-card img,
.solution-card img {
    width: 100%;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
}

.feature-list,
.benefits-list,
.product-feature-list,
.parts-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li,
.benefits-list li,
.product-feature-list li,
.parts-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-mid);
}

.feature-list li::before,
.benefits-list li::before,
.product-feature-list li::before,
.parts-list li::before {
    content: '•';
    color: var(--color-accent-green);
    position: absolute;
    left: 0;
}

.data-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
}

.data-card {
    background: linear-gradient(160deg, #0F1F39, #053B74);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    color: var(--color-text-light);
}

.data-card strong {
    font-size: 2.25rem;
}

/* -------------------------------------------------------------
 * 7. Page Hero & Breadcrumb
 * ------------------------------------------------------------- */
.page-hero,
.page-header {
    position: relative;
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: var(--header-height);
    overflow: hidden;
    color: var(--color-text-light);
    text-align: center;
}

.page-hero::before,
.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(0, 26, 64, 0.8), rgba(0, 102, 204, 0.65));
}

.page-hero h1,
.page-header h1 {
    position: relative;
    z-index: 1;
    color: var(--color-text-light);
}

.breadcrumb {
    list-style: none;
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

.breadcrumb li::after {
    content: '/';
    margin-left: var(--spacing-sm);
}

.breadcrumb li:last-child::after {
    display: none;
}

/* -------------------------------------------------------------
 * 8. Sidebar Navigation
 * ------------------------------------------------------------- */
.sidebar {
    background-color: var(--color-background-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--box-shadow-sm);
}

.sidebar h3 {
    margin-top: 0;
    font-size: 1rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    text-transform: uppercase;
    border-bottom: 1px solid var(--color-secondary-light);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

.sidebar ul li a {
    display: block;
    padding: var(--spacing-sm) 0;
    color: var(--color-text-mid);
    border-left: 3px solid transparent;
    padding-left: var(--spacing-md);
    transition: all 0.2s ease;
}

.sidebar ul li a:hover,
.sidebar ul li a.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    background-color: rgba(0, 102, 204, 0.08);
}

/* -------------------------------------------------------------
 * 9. Timeline
 * ------------------------------------------------------------- */
.timeline {
    position: relative;
    padding-left: var(--spacing-xxl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 25px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-secondary-light);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xxl);
    padding-left: var(--spacing-lg);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 0 6px rgba(0, 102, 204, 0.1);
}

/* -------------------------------------------------------------
 * 10. Case, Partner & News Modules
 * ------------------------------------------------------------- */
.case-card-content,
.product-category-card-content,
.decoration-card-content,
.ev-service-card,
.news-item-content {
    margin-top: var(--spacing-sm);
}

.case-meta,
.news-meta,
.job-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-lg);
}

.partner-logo {
    background-color: var(--color-background-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.partner-logo:hover {
    transform: translateY(-4px);
}

.news-item {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.news-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-item-content p {
    flex: 1;
    color: var(--color-text-mid);
}

.news-item a {
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

/* -------------------------------------------------------------
 * 11. Career & Job Cards
 * ------------------------------------------------------------- */
.job-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.job-meta-detail {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
}

.job-content {
    flex: 1;
}

/* -------------------------------------------------------------
 * 12. Service & FAQ
 * ------------------------------------------------------------- */
.service-item h3,
.support-card h3 {
    margin-top: var(--spacing-sm);
}

.faq-item {
    border-bottom: 1px solid var(--color-secondary-light);
    padding: var(--spacing-md) 0;
}

.faq-item h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.faq-content {
    color: var(--color-text-mid);
}

/* -------------------------------------------------------------
 * 13. Contact & Forms
 * ------------------------------------------------------------- */
.contact-section {
    background: radial-gradient(circle at top, rgba(0, 102, 204, 0.12), transparent 55%);
}

.contact-form {
    background-color: var(--color-background-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl);
    box-shadow: var(--box-shadow-sm);
}

.contact-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
}

.contact-form input,
.contact-form textarea,
form input,
form textarea,
form select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-secondary-light);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
    font-family: inherit;
}

.contact-form textarea {
    min-height: 120px;
}

.map-container {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--box-shadow-md);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    display: block;
    border: 0;
}

/* -------------------------------------------------------------
 * 14. Article Content
 * ------------------------------------------------------------- */
.article-content img {
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-sm);
}

.article-content blockquote {
    border-left: 4px solid var(--color-accent-green);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-surface);
    font-style: italic;
}

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

/* -------------------------------------------------------------
 * 15. Tables & Lists
 * ------------------------------------------------------------- */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-xxl);
}

table th,
table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-secondary-light);
    text-align: left;
}

table th {
    background-color: var(--color-surface);
    color: var(--color-primary-dark);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    list-style: none;
}

.pagination li a {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-secondary-light);
}

.pagination li a.active,
.pagination li a:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
}

/* -------------------------------------------------------------
 * 16. Footer
 * ------------------------------------------------------------- */
.footer {
    background: linear-gradient(180deg, #041024, #060B16);
    color: rgba(255, 255, 255, 0.85);
    padding: var(--spacing-xxxl) 0 var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.footer h4 {
    color: #fff;
}

.footer a {
    color: var(--color-primary-accent);
}

.footer a:hover {
    color: var(--color-primary-light);
}

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

.footer ul li {
    margin-bottom: var(--spacing-sm);
}

.footer .text-center {
    margin-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
}
.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature-item .icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.feature-item h4 {
    margin-bottom: var(--spacing-xs);
}

.news-item-img {
    width: 100%;
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
}

.car-card,
.solution-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.car-card-content,
.solution-card-content {
    flex: 1;
}

.product-category-card,
.decoration-card {
    display: block;
    height: 100%;
    color: inherit;
}

.product-category-card:hover,
.decoration-card:hover {
    text-decoration: none;
}

.solution-detail-section {
    padding: var(--spacing-xxl) 0;
    border-bottom: 1px solid var(--color-secondary-light);
}

.solution-detail-section:last-child {
    border-bottom: none;
}

.org-chart-container {
    overflow-x: auto;
}

.org-chart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.level {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.node {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-secondary-light);
    background-color: var(--color-background-white);
    min-width: 180px;
    text-align: center;
    box-shadow: var(--box-shadow-sm);
}

.node-dept {
    border-color: var(--color-primary);
}

.node-sub {
    border-color: var(--color-secondary);
}