/* ================================
   浙江德圣钢业 — 新版首页样式
   设计风格：现代工业风 / 银灰金属质感
   ================================ */

/* ========== Reset & Base ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #1a3a5c;
    --color-primary-dark: #0f2540;
    --color-primary-light: #2c5a8c;
    --color-accent: #c8893a;
    --color-accent-light: #e0a850;
    --color-accent-dark: #a06d20;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-bg: #ffffff;
    --color-bg-light: #f5f7fa;
    --color-bg-dark: #1a2332;
    --color-border: #e0e4e8;
    --color-border-dark: #d0d5da;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 6px;
    --radius-lg: 12px;
    --container-max: 1200px;
}

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

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

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

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

ul {
    list-style: none;
}

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

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(200, 137, 58, 0.4);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* ========== Top Bar ========== */
.top-bar {
    background: var(--color-bg-dark);
    color: #b0b8c4;
    font-size: 13px;
    padding: 8px 0;
}

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

.top-bar-slogan {
    font-style: italic;
}

.top-bar-links a:hover {
    color: var(--color-accent-light);
}

.top-bar-links .divider {
    margin: 0 10px;
    color: #555;
}

/* ========== Header ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #fff;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    max-width: var(--container-max);
    margin: 0 auto;
}

.logo-area {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 52px;
    width: auto;
    display: block;
    flex-shrink: 0;
}

.logo-area:hover .logo-img {
    opacity: 0.85;
}

.logo-text {
    display: flex;
    flex-direction: column;
    margin-left: 14px;
    line-height: 1.2;
}

.logo-name {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 2px;
}

.logo-sub {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    margin-top: 2px;
}

.header-contact {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.header-contact-label {
    font-size: 12px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

.header-contact-phone {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 26px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Main Nav ========== */
.main-nav {
    background: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.nav-list {
    display: flex;
    align-items: center;
}

.nav-list > li {
    position: relative;
    flex: 1;
    text-align: center;
}

.nav-list > li > a {
    display: block;
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    padding: 16px 12px;
    position: relative;
    transition: var(--transition);
}

.nav-list > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav-list > li > a:hover::after,
.nav-list > li > a.active::after {
    width: 60%;
}

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

.has-dropdown > a::before {
    content: '\25BE';
    margin-left: 4px;
    font-size: 10px;
    opacity: 0.7;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: var(--shadow-md);
    border-radius: 0 0 var(--radius) var(--radius);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
}

.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown li a {
    display: block;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.dropdown li:last-child a {
    border-bottom: none;
}

.dropdown li a:hover {
    background: var(--color-bg-light);
    color: var(--color-primary);
}

/* ========== Hero Slider ========== */
.hero-slider {
    position: relative;
    height: 520px;
    overflow: hidden;
    background: var(--color-bg-dark);
}

.slider-track {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 37, 64, 0.7) 0%, rgba(15, 37, 64, 0.4) 50%, rgba(15, 37, 64, 0.2) 100%);
    display: flex;
    align-items: center;
}

.slide-content {
    max-width: 600px;
    animation: fadeInUp 0.8s ease;
}

.slide.active .slide-content {
    animation: fadeInUp 0.8s ease;
}

.slide-title {
    font-size: 42px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.slide-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 30px;
    line-height: 1.8;
    text-shadow: 0 1px 5px rgba(0,0,0,0.3);
}

.slider-controls {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    transform: translateY(-50%);
    pointer-events: none;
}

.slider-arrow {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.4);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    pointer-events: all;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.slider-arrow:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.slider-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    border: 2px solid rgba(255,255,255,0.6);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    width: 32px;
    border-radius: 6px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== Stats Bar ========== */
.stats-bar {
    background: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    padding: 40px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    color: #fff;
    border-right: 1px solid rgba(255,255,255,0.15);
}

.stat-item:last-child {
    border-right: none;
}

.stat-number {
    font-size: 38px;
    font-weight: 700;
    color: var(--color-accent-light);
    line-height: 1.2;
}

.stat-unit {
    font-size: 18px;
    font-weight: 500;
    margin-left: 2px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
    margin-top: 6px;
    letter-spacing: 1px;
}

/* ========== Section Headers ========== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
    padding-top: 70px;
}

.section-header-en {
    display: block;
    font-size: 14px;
    color: var(--color-text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.section-header-cn {
    font-size: 30px;
    font-weight: 700;
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

.section-header-line {
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: 16px auto 0;
    border-radius: 2px;
    position: relative;
}

.section-header-line::before,
.section-header-line::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    transform: translateY(-50%);
}

.section-header-line::before {
    left: -20px;
}

.section-header-line::after {
    right: -20px;
}

.section-header-light .section-header-cn {
    color: #fff;
}

.section-header-light .section-header-en {
    color: rgba(255,255,255,0.6);
}

/* ========== About Section ========== */
.about-section {
    padding-bottom: 70px;
    background: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.about-image img {
    width: 100%;
    height: 360px;
    object-fit: cover;
    transition: var(--transition);
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-image-badge {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: rgba(26, 58, 92, 0.9);
    color: #fff;
    padding: 16px 24px;
    border-radius: var(--radius);
    text-align: center;
    backdrop-filter: blur(8px);
}

.badge-number {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--color-accent-light);
}

.badge-text {
    display: block;
    font-size: 13px;
    color: rgba(255,255,255,0.85);
}

.about-company {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
    position: relative;
    padding-left: 16px;
}

.about-company::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--color-accent);
    border-radius: 2px;
}

.about-desc {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 14px;
    text-align: justify;
}

.about-desc strong {
    color: var(--color-primary);
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 20px 0;
}

.tag {
    display: inline-block;
    padding: 6px 14px;
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--color-text-light);
    transition: var(--transition);
}

.tag:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.about-actions {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

/* ========== Products Section ========== */
.products-section {
    background: var(--color-bg-light);
    padding-bottom: 70px;
}

.product-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    background: #fff;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
}

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

.tab-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.product-img-wrap {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    background: var(--color-bg-light);
}

.product-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img-wrap img {
    transform: scale(1.1);
}

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(26, 58, 92, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-overlay {
    opacity: 1;
}

.product-link {
    padding: 10px 24px;
    border: 2px solid #fff;
    color: #fff;
    border-radius: var(--radius);
    font-size: 14px;
    transform: translateY(10px);
    transition: var(--transition);
}

.product-card:hover .product-link {
    transform: translateY(0);
}

.product-link:hover {
    background: #fff;
    color: var(--color-primary);
}

.product-info {
    padding: 16px;
    text-align: center;
}

.product-info h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.product-cat {
    display: inline-block;
    font-size: 12px;
    color: var(--color-text-muted);
    padding: 2px 10px;
    background: var(--color-bg-light);
    border-radius: 10px;
}

/* ========== Workshop Section ========== */
.workshop-section {
    background: var(--color-bg-dark);
    background: linear-gradient(135deg, #1a2332, #0f1a28);
    padding-bottom: 70px;
}

.workshop-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.workshop-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    box-shadow: var(--shadow-md);
    cursor: pointer;
}

.workshop-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.workshop-card:hover img {
    transform: scale(1.08);
}

.workshop-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    transition: var(--transition);
}

.workshop-overlay h3 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    transform: translateY(0);
    transition: var(--transition);
}

.workshop-card:hover .workshop-overlay {
    padding-bottom: 28px;
}

/* ========== Materials Section ========== */
.materials-section {
    padding-bottom: 70px;
    background: var(--color-bg);
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.material-card {
    text-align: center;
    padding: 32px 20px;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    transition: var(--transition);
}

.material-card:hover {
    border-color: var(--color-accent);
    background: #fff;
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.material-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(26, 58, 92, 0.3);
}

.material-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.material-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.specs-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

.specs-table th {
    background: var(--color-primary);
    color: #fff;
    padding: 16px 20px;
    font-size: 15px;
    font-weight: 600;
    text-align: left;
}

.specs-table td {
    padding: 14px 20px;
    font-size: 14px;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
}

.specs-table tr:last-child td {
    border-bottom: none;
}

.specs-table tr:nth-child(even) {
    background: var(--color-bg-light);
}

.specs-table tr:hover {
    background: #f0f4f8;
}

/* ========== News Section ========== */
.news-section {
    background: var(--color-bg-light);
    padding-bottom: 70px;
}

.news-layout {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
}

.news-featured {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 360px;
    box-shadow: var(--shadow-md);
}

.news-featured img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-featured-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(transparent, rgba(15, 37, 64, 0.9));
}

.news-featured-content h3 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 8px;
}

.news-featured-content p {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.news-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px dashed var(--color-border-dark);
    transition: var(--transition);
}

.news-item:last-child {
    border-bottom: none;
}

.news-item:hover {
    padding-left: 10px;
}

.news-date {
    flex-shrink: 0;
    font-size: 13px;
    color: var(--color-text-muted);
    width: 90px;
}

.news-title {
    font-size: 15px;
    color: var(--color-text);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.news-item:hover .news-title {
    color: var(--color-primary);
}

/* ========== Service Section ========== */
.service-section {
    background: var(--color-bg-dark);
    background: linear-gradient(135deg, #1a2332, #0f1a28);
    padding-bottom: 70px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    text-align: center;
    padding: 36px 24px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

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

.service-icon-box {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.service-icon-box svg {
    width: 30px;
    height: 30px;
}

.service-card h3 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

/* ========== Contact Section ========== */
.contact-section {
    padding-bottom: 70px;
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.contact-item:hover {
    background: #fff;
    box-shadow: var(--shadow-md);
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item h4 {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
    font-weight: 500;
}

.contact-item p {
    font-size: 16px;
    color: var(--color-text);
    font-weight: 600;
    line-height: 1.6;
}

.contact-qr {
    text-align: center;
    padding: 30px;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
}

.contact-qr img {
    width: 180px;
    height: 180px;
    margin: 0 auto 16px;
    border-radius: var(--radius);
    border: 4px solid #fff;
    box-shadow: var(--shadow-sm);
}

.contact-qr p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========== Footer ========== */
.site-footer {
    background: var(--color-bg-dark);
    background: linear-gradient(135deg, #0f1a28, #1a2332);
    color: rgba(255,255,255,0.7);
    padding: 50px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .footer-logo {
    height: 48px;
    margin-bottom: 16px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    font-size: 13px;
    line-height: 1.8;
    color: rgba(255,255,255,0.6);
}

.footer-top h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 10px;
}

.footer-top h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--color-accent);
}

.footer-nav ul,
.footer-products ul,
.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav a,
.footer-products a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}

.footer-nav a:hover,
.footer-products a:hover {
    color: var(--color-accent-light);
    padding-left: 6px;
}

.footer-contact p {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 8px;
}

.footer-phone {
    font-size: 22px !important;
    font-weight: 700;
    color: var(--color-accent-light) !important;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    line-height: 1.8;
}

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

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

/* ========== Float Sidebar ========== */
.float-sidebar {
    position: fixed;
    right: 20px;
    bottom: 100px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.float-item {
    width: 56px;
    height: 56px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    transition: var(--transition);
    cursor: pointer;
    overflow: hidden;
    position: relative;
}

.float-item svg {
    width: 22px;
    height: 22px;
}

.float-item span {
    font-size: 10px;
    margin-top: 2px;
    white-space: nowrap;
}

.float-item:hover {
    background: var(--color-primary);
    color: #fff;
}

.float-top {
    opacity: 0;
    visibility: hidden;
}

.float-top.visible {
    opacity: 1;
    visibility: visible;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .workshop-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    
    .header-inner {
        padding: 12px 16px;
    }
    
    .header-contact-phone {
        font-size: 20px;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-primary);
    }
    
    .main-nav.open {
        display: block;
    }
    
    .nav-list {
        flex-direction: column;
    }
    
    .nav-list > li {
        width: 100%;
        text-align: left;
    }
    
    .nav-list > li > a {
        padding: 14px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(0,0,0,0.2);
        border-radius: 0;
    }
    
    .hero-slider {
        height: 360px;
    }
    
    .slide-title {
        font-size: 28px;
    }
    
    .slide-desc {
        font-size: 14px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255,255,255,0.15);
        padding-bottom: 16px;
    }
    
    .stat-item:nth-last-child(-n+2) {
        border-bottom: none;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .section-header-cn {
        font-size: 24px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .workshop-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .materials-grid {
        grid-template-columns: 1fr;
    }
    
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-layout {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .float-sidebar {
        right: 10px;
        bottom: 60px;
    }
    
    .float-item {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .workshop-grid {
        grid-template-columns: 1fr;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
    
    .about-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }

    .logo-text {
        display: none;
    }
}

/* ========== Hero Single (单张Banner) ========== */
.hero-single {
    position: relative;
    height: 520px;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    background-color: var(--color-bg-dark);
}

.hero-single .slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 37, 64, 0.65) 0%, rgba(15, 37, 64, 0.35) 50%, rgba(15, 37, 64, 0.15) 100%);
    display: flex;
    align-items: center;
}

.hero-single .slide-content {
    max-width: 600px;
    animation: fadeInUp 1s ease;
}

.hero-single .slide-title {
    font-size: 42px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-single .slide-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 30px;
    line-height: 1.8;
    text-shadow: 0 1px 5px rgba(0,0,0,0.3);
}

@media (max-width: 768px) {
    .hero-single {
        height: 360px;
    }

    .hero-single .slide-title {
        font-size: 26px;
    }

    .hero-single .slide-desc {
        font-size: 14px;
        margin-bottom: 20px;
    }
}

/* ========== Contact Modal (联系弹窗) ========== */
.contact-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.contact-modal.open {
    display: flex;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.contact-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.contact-modal-content {
    position: relative;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 480px;
    width: 100%;
    overflow: hidden;
    animation: modalSlideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.contact-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    font-size: 24px;
    color: var(--color-text-light);
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.contact-modal-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--color-text);
    transform: rotate(90deg);
}

.contact-modal-header {
    padding: 32px 32px 20px;
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
}

.contact-modal-header h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}

.contact-modal-header p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.contact-modal-body {
    display: flex;
    gap: 24px;
    padding: 28px 32px;
    align-items: center;
}

.contact-modal-qr {
    text-align: center;
    flex-shrink: 0;
}

.contact-modal-qr img {
    width: 140px;
    height: 140px;
    border-radius: var(--radius);
    border: 2px solid var(--color-border);
    object-fit: cover;
}

.contact-modal-qr p {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 8px;
}

.contact-modal-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-modal-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-modal-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-modal-item .label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.contact-modal-item .value {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.contact-modal-footer {
    padding: 0 32px 28px;
    text-align: center;
}

.contact-modal-footer .btn {
    width: 100%;
    font-size: 16px;
    padding: 14px;
}

@media (max-width: 480px) {
    .contact-modal-body {
        flex-direction: column;
        text-align: center;
        padding: 24px 20px;
    }

    .contact-modal-info {
        align-items: center;
    }

    .contact-modal-header {
        padding: 24px 20px 16px;
    }

    .contact-modal-footer {
        padding: 0 20px 24px;
    }
}