/* ============================================
   鸿浩鑫精密五金 - 网站样式表
   配色：深海军蓝 + 工业橙
   ============================================ */

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

:root {
    /* 主色调 */
    --color-primary: #0d2740;
    --color-primary-light: #1a4d7a;
    --color-primary-dark: #061826;
    --color-accent: #e87722;
    --color-accent-light: #f59e4d;
    --color-accent-dark: #c95f12;

    /* 中性色 */
    --color-white: #ffffff;
    --color-light: #f5f7fa;
    --color-light-alt: #eef2f7;
    --color-gray: #6c7a89;
    --color-gray-light: #a0aab5;
    --color-dark: #1a1a2e;
    --color-border: #e0e6ed;

    /* 字体 */
    --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

    /* 间距 */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* 过渡 */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-dark);
    background: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(232, 119, 34, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-large {
    padding: 18px 48px;
    font-size: 1.1rem;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 39, 64, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
    padding: 18px 0;
}

.navbar.scrolled {
    background: rgba(13, 39, 64, 0.98);
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 800;
    border-radius: 6px;
    letter-spacing: 1px;
}

.logo-text {
    color: var(--color-white);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 4px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}

.nav-cta {
    padding: 10px 28px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 4px;
    transition: var(--transition);
}

.nav-cta:hover {
    background: var(--color-accent-dark);
    transform: translateY(-1px);
}

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

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

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== 语言切换器 ===== */
.lang-switcher {
    display: flex;
    gap: 4px;
    margin-left: 12px;
    align-items: center;
}

.lang-switcher-item {
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    border: 1px solid rgba(255,255,255,0.2);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 5px 9px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
    line-height: 1;
}

.lang-switcher-item:hover {
    background: rgba(255,255,255,0.2);
    color: var(--color-white);
}

.lang-switcher-item.active {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

/* ===== Hero 首页 ===== */
.hero {
    position: relative;
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 60px 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(135deg, #0d2740 0%, #1a4d7a 50%, #0d2740 100%);
    z-index: 1;
}

.hero-bg::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 49px, rgba(255, 255, 255, 0.03) 49px, rgba(255, 255, 255, 0.03) 50px),
        repeating-linear-gradient(90deg, transparent, transparent 49px, rgba(255, 255, 255, 0.03) 49px, rgba(255, 255, 255, 0.03) 50px);
}

.hero-bg::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(232, 119, 34, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, rgba(26, 77, 122, 0.4) 0%, transparent 50%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 0 24px;
    max-width: 900px;
}

.hero-subtitle {
    color: var(--color-accent-light);
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 3px;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.hero-title {
    color: var(--color-white);
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 24px;
    letter-spacing: 4px;
}

.hero-desc {
    color: rgba(255, 255, 255, 0.75);
    font-size: 1.15rem;
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-num {
    color: var(--color-white);
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
}

.stat-plus {
    color: var(--color-accent);
}

.stat-label {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    margin-top: 8px;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0%, 100% { transform: scaleY(1); transform-origin: top; }
    50% { transform: scaleY(0.5); transform-origin: bottom; }
}

/* ===== 通用 Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 2px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    margin: 20px auto 0;
    border-radius: 2px;
}

.section-desc {
    color: var(--color-gray);
    font-size: 1rem;
    margin-top: 20px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== 关于鸿浩鑫 ===== */
.about {
    padding: var(--section-padding);
    background: var(--color-light);
}

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

.about-text h3 {
    font-size: 1.6rem;
    color: var(--color-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

.about-text p {
    color: var(--color-gray);
    font-size: 1rem;
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 36px;
}

.about-feature {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.about-feature:hover .feature-icon {
    background: var(--color-accent);
    color: var(--color-white);
    transform: translateY(-3px);
}

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

.about-feature h4 {
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: 4px;
}

.about-feature p {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin: 0;
}

/* About 右侧卡片 */
.about-card {
    background: var(--color-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: 28px 36px;
}

.card-badge {
    color: var(--color-white);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.about-card-body {
    padding: 36px;
}

.advantage-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
}

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

.adv-num {
    flex-shrink: 0;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-accent);
    opacity: 0.5;
    line-height: 1;
}

.adv-content h4 {
    font-size: 1.05rem;
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: 4px;
}

.adv-content p {
    font-size: 0.88rem;
    color: var(--color-gray);
    margin: 0;
}

/* ===== 业务板块 ===== */
.business {
    padding: var(--section-padding);
    background: var(--color-white);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.biz-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--color-white);
    border-radius: 10px;
    padding: 24px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.biz-card:hover {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

.biz-num {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
}

.biz-num-1 { background: linear-gradient(135deg, #1a4d7a, #0d2740); }
.biz-num-2 { background: linear-gradient(135deg, #c95f12, #e87722); }
.biz-num-3 { background: linear-gradient(135deg, #2c5f7a, #1a3a5c); }
.biz-num-4 { background: linear-gradient(135deg, #3a6b8a, #1a4d7a); }

.biz-body {
    flex: 1;
    min-width: 0;
}

.biz-body h3 {
    color: var(--color-dark);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.biz-body p {
    color: var(--color-gray);
    font-size: 0.85rem;
    line-height: 1.55;
    margin-bottom: 10px;
}

.biz-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.biz-tags span {
    display: inline-block;
    padding: 3px 10px;
    background: #f0f4f8;
    color: #4a6a8a;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
    white-space: nowrap;
}

/* ===== 产品展示（产品介绍） ===== */
.products-showcase {
    padding: var(--section-padding);
    background: var(--color-light);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.showcase-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: var(--color-white);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: inherit;
}

.showcase-item:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.showcase-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.showcase-icon svg {
    width: 20px;
    height: 20px;
}

.showcase-text {
    flex: 1;
    min-width: 0;
}

.showcase-text h3 {
    color: var(--color-dark);
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.showcase-text p {
    color: var(--color-gray);
    font-size: 0.8rem;
    line-height: 1.5;
    margin: 0;
}

@media (max-width: 992px) {
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .showcase-grid {
        grid-template-columns: 1fr;
    }

    .showcase-item {
        padding: 16px;
        gap: 12px;
    }
}

/* ===== 设备中心 ===== */
.equipment {
    padding: var(--section-padding);
    background: var(--color-primary);
    position: relative;
    overflow: hidden;
}

.equipment::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 49px, rgba(255, 255, 255, 0.02) 49px, rgba(255, 255, 255, 0.02) 50px),
        repeating-linear-gradient(90deg, transparent, transparent 49px, rgba(255, 255, 255, 0.02) 49px, rgba(255, 255, 255, 0.02) 50px);
}

.equipment .section-title {
    color: var(--color-white);
}

.equipment .section-desc {
    color: rgba(255, 255, 255, 0.6);
}

.equipment-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.equip-card {
    flex: 0 0 calc(33.333% - 16px);
    max-width: calc(33.333% - 16px);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.equip-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.equip-img {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

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

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

.equip-text {
    padding: 24px 22px;
}

.equip-text h3 {
    color: var(--color-white);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.equip-text p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    line-height: 1.7;
}

/* ===== 联系我们 ===== */
.contact {
    padding: var(--section-padding);
    background: var(--color-light);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background: var(--color-white);
    border-radius: 16px;
    padding: 50px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border);
}

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

.contact-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.contact-icon svg {
    width: 26px;
    height: 26px;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--color-gray);
    letter-spacing: 1px;
}

.contact-value {
    font-size: 1.2rem;
    color: var(--color-primary);
    font-weight: 600;
}

.contact-link:hover {
    color: var(--color-accent);
}

.contact-cta-box {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 16px;
    padding: 50px;
    text-align: center;
    color: var(--color-white);
}

.contact-cta-box h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-cta-box p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.contact-cta-box .btn-primary {
    background: var(--color-accent);
}

.contact-cta-box .btn-primary:hover {
    background: var(--color-accent-dark);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo-text {
    color: var(--color-white);
    font-size: 1.1rem;
    font-weight: 700;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.8;
    max-width: 320px;
}

.footer-links h4,
.footer-contact h4 {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--color-accent);
    padding-left: 5px;
}

.footer-contact p {
    font-size: 0.88rem;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(232, 119, 34, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-accent-dark);
    transform: translateY(-3px);
}

.back-to-top svg {
    width: 22px;
    height: 22px;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式设计 ===== */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2rem;
        letter-spacing: 3px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .business-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .biz-card {
        padding: 18px;
        gap: 12px;
    }

    .biz-num {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .equipment-grid {
        gap: 20px;
    }

    .equip-card {
        flex: 0 0 calc(50% - 10px);
        max-width: calc(50% - 10px);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .section-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-primary);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 30px 30px;
        gap: 0;
        transition: right 0.4s ease;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.3);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-link.active::after {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .logo-text {
        font-size: 1rem;
    }

    .hero-title {
        font-size: 1.6rem;
        letter-spacing: 2px;
    }

    .hero-subtitle {
        font-size: 0.85rem;
    }

    .hero-desc {
        font-size: 0.95rem;
    }

    .hero-actions {
        flex-direction: column;
        gap: 14px;
    }

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

    .hero-stats {
        gap: 24px;
    }

    .stat-num {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    .stat-divider {
        height: 40px;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .equipment-grid {
        gap: 16px;
    }

    .equip-card {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .contact-card,
    .contact-cta-box {
        padding: 30px;
    }

    .contact-item {
        gap: 16px;
        padding: 18px 0;
    }

    .contact-icon {
        width: 46px;
        height: 46px;
    }

    .contact-value {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.3rem;
        letter-spacing: 1px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-divider {
        width: 50px;
        height: 1px;
    }

    .product-info {
        padding: 24px;
    }

    .showcase-img {
        height: 200px;
    }

    .showcase-info {
        padding: 20px;
    }

    .equip-img {
        height: 160px;
    }
}

/* ===== 板块"了解更多"跳转链接 ===== */
.section-more {
    text-align: center;
    margin-top: 40px;
}

.more-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 36px;
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 1px;
    transition: var(--transition);
}

.more-link:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 39, 64, 0.25);
}

/* 设备中心板块的按钮适配深色背景 */
.equipment .more-link {
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.5);
}

.equipment .more-link:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 6px 20px rgba(232, 119, 34, 0.3);
}

/* ===== 点击查看详情 ===== */
.view-more {
    display: inline-block;
    margin-top: 12px;
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.diecasting-trigger:hover .view-more {
    color: #ff9933;
}

/* ===== 压铸机详情弹窗 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-white);
    border-radius: 16px;
    max-width: 1100px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 40px;
    position: relative;
    transform: translateY(30px) scale(0.96);
    transition: transform 0.3s ease;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 50%;
    font-size: 1.6rem;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    padding-bottom: 3px;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--color-accent);
    color: var(--color-white);
    transform: rotate(90deg);
}

.modal-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 30px;
    text-align: center;
}

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

.modal-item {
    background: var(--color-light);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.modal-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.modal-item img {
    width: 100%;
    max-height: 450px;
    object-fit: contain;
    display: block;
    background: #f5f5f5;
}

.modal-item video {
    width: 100%;
    max-height: 450px;
    display: block;
    background: #000;
}

/* CNC弹窗：两列大图布局 */
.cnc-gallery {
    grid-template-columns: repeat(2, 1fr);
}

.cnc-gallery .modal-item img,
.cnc-gallery .modal-item video {
    max-height: 450px;
}

.cnc-video-item video {
    cursor: pointer;
}

.modal-label {
    display: block;
    text-align: center;
    padding: 14px;
    font-weight: 600;
    color: var(--color-dark);
    font-size: 1rem;
    background: var(--color-white);
}

@media (max-width: 768px) {
    .modal-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .cnc-gallery {
        grid-template-columns: 1fr;
    }

    .cnc-gallery .modal-item img,
    .cnc-gallery .modal-item video {
        max-height: 350px;
    }

    .modal-content {
        padding: 24px;
        max-height: 85vh;
    }

    .modal-title {
        font-size: 1.3rem;
        margin-bottom: 20px;
    }

    .modal-item img,
    .modal-item video {
        max-height: 350px;
    }