/* ===========================================
   东莞市睿达机电有限公司 - 官网样式
   蓝白工业商务风 / Modern Industrial Style
   =========================================== */

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

:root {
    --primary: #0F2C5A;
    --primary-light: #1A3F7E;
    --primary-dark: #091E40;
    --accent: #2563EB;
    --accent-light: #3B82F6;
    --text-dark: #1F2937;
    --text-gray: #6B7280;
    --text-light: #9CA3AF;
    --bg-page: #F5F7FA;
    --bg-white: #FFFFFF;
    --bg-section: #F8FAFC;
    --border-color: #E5E7EB;
    --border-light: #F1F3F5;
    --shadow-sm: 0 1px 2px rgba(15, 44, 90, 0.04);
    --shadow-md: 0 4px 12px rgba(15, 44, 90, 0.06);
    --shadow-lg: 0 10px 30px rgba(15, 44, 90, 0.08);
    --shadow-xl: 0 20px 50px rgba(15, 44, 90, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-w: 1200px;
    --header-h: 76px;
    --radius: 8px;
    --radius-lg: 12px;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    background: var(--bg-page);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ===== 通用容器 ===== */
.container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 顶部导航栏 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-white);
    height: var(--header-h);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    border-radius: 6px;
    letter-spacing: -1px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text .cn {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.logo-text .en {
    font-size: 11px;
    color: var(--text-gray);
    letter-spacing: 1.5px;
    margin-top: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu > li > a {
    display: block;
    padding: 10px 18px;
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    border-radius: 4px;
}

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

.nav-menu > li > a.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.nav-menu > li > a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-menu > li > a:hover::after {
    transform: scaleX(1);
}

.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #fff;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    border-radius: var(--radius);
}

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

.dropdown li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-dark);
}

.dropdown li a:hover {
    background: var(--bg-section);
    color: var(--accent);
    padding-left: 24px;
}

.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    flex-direction: column;
    justify-content: space-around;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--primary);
    margin: 3px auto;
    transition: var(--transition);
}

/* ===== Hero Banner ===== */
.hero {
    position: relative;
    margin-top: var(--header-h);
    height: 560px;
    background: linear-gradient(135deg, rgba(15, 44, 90, 0.92) 0%, rgba(26, 63, 126, 0.85) 100%),
                url("../images/banner-drums.jpg") center/cover;
    display: flex;
    align-items: center;
    color: #fff;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(90deg, rgba(15, 44, 90, 0.85) 0%, rgba(15, 44, 90, 0.4) 60%, transparent 100%),
        radial-gradient(circle at 80% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--container-w);
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 6px 16px;
    font-size: 13px;
    border-radius: 100px;
    margin-bottom: 24px;
    letter-spacing: 1px;
    backdrop-filter: blur(8px);
}

.hero h1 {
    font-size: 46px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
    max-width: 800px;
}

.hero h1 .accent {
    color: #93C5FD;
    font-weight: 600;
}

.hero p.lead {
    font-size: 17px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    max-width: 720px;
    margin-bottom: 36px;
}

.hero-buttons {
    display: flex;
    gap: 14px;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 32px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
    line-height: 1.4;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.4);
}

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

.btn-white {
    background: #fff;
    color: var(--primary);
}

.btn-white:hover {
    background: var(--bg-section);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

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

.hero-stat .number {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -1px;
}

.hero-stat .number span {
    color: #93C5FD;
    font-size: 26px;
    margin-left: 2px;
}

.hero-stat .label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* ===== 通用 Section ===== */
.section {
    padding: 90px 0;
}

.section.tight {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title .subtitle {
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.section-title .divider {
    width: 40px;
    height: 3px;
    background: var(--accent);
    margin: 0 auto 18px;
    border-radius: 2px;
}

.section-title p {
    color: var(--text-gray);
    font-size: 15px;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== 优势区 ===== */
.advantages {
    background: var(--bg-white);
}

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

.adv-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: left;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.adv-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

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

.adv-card:hover::before {
    transform: scaleX(1);
}

.adv-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.adv-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}

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

/* ===== 产品中心 ===== */
.products-section {
    background: var(--bg-section);
}

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

.product-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
}

.product-img {
    position: relative;
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, #F0F4F9 0%, #E6EDF5 100%);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.product-card:hover .product-img img {
    transform: scale(1.06);
}

.product-img .tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(15, 44, 90, 0.9);
    color: #fff;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 4px;
    z-index: 2;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
}

.product-info {
    padding: 22px 24px 26px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-info h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.product-info p {
    color: var(--text-gray);
    font-size: 13.5px;
    line-height: 1.7;
    flex: 1;
    margin-bottom: 14px;
}

.product-info .meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--border-light);
    font-size: 13px;
    color: var(--accent);
    font-weight: 500;
}

.product-info .meta .arrow {
    transition: transform 0.3s ease;
}

.product-card:hover .product-info .meta .arrow {
    transform: translateX(4px);
}

/* ===== 蓝白工业风占位卡片 ===== */
.placeholder-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.placeholder-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
}

.placeholder-img {
    position: relative;
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, #EAF2FB 0%, #D5E3F4 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.placeholder-img::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(45deg, transparent 48%, rgba(15, 44, 90, 0.05) 49%, rgba(15, 44, 90, 0.05) 51%, transparent 52%) 0 0 / 24px 24px,
        linear-gradient(-45deg, transparent 48%, rgba(15, 44, 90, 0.05) 49%, rgba(15, 44, 90, 0.05) 51%, transparent 52%) 0 0 / 24px 24px;
    opacity: 0.6;
}

.placeholder-icon {
    width: 90px;
    height: 90px;
    background: #fff;
    border: 2px solid var(--accent);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.15);
    position: relative;
    z-index: 1;
}

.placeholder-img .tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 4px;
    z-index: 2;
    letter-spacing: 0.5px;
}

.placeholder-card .product-info .meta {
    color: var(--text-light);
}

/* ===== 数据统计 ===== */
.stats-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.stats-section .section-title h2 {
    color: #fff;
}

.stats-section .section-title p {
    color: rgba(255, 255, 255, 0.7);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: 24px 0;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -1px;
    line-height: 1;
    margin-bottom: 12px;
}

.stat-number span {
    color: #93C5FD;
    font-size: 32px;
    margin-left: 2px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 1.5px;
}

/* ===== 行业应用 ===== */
.industry-section {
    background: var(--bg-white);
}

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

.industry-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.industry-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.04) 0%, rgba(15, 44, 90, 0.06) 100%);
    opacity: 0;
    transition: var(--transition);
}

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

.industry-card:hover::after {
    opacity: 1;
}

.industry-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    position: relative;
    z-index: 1;
}

.industry-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.industry-card p {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* ===== 关于我们 概览 ===== */
.about-overview {
    background: var(--bg-white);
}

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

.about-text h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.about-text h2 .accent {
    color: var(--accent);
}

.about-text p {
    color: var(--text-gray);
    font-size: 15px;
    line-height: 1.85;
    margin-bottom: 16px;
}

.about-text .btn {
    margin-top: 20px;
}

.about-visual {
    position: relative;
    height: 420px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

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

.about-visual .badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 16px 24px;
    border-radius: 8px;
    border-left: 3px solid var(--accent);
}

.about-visual .badge .num {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.about-visual .badge .lbl {
    font-size: 12px;
    color: var(--text-gray);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* ===== 文化卡片 ===== */
.culture-section {
    background: var(--bg-section);
}

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

.culture-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition);
}

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

.culture-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #EAF2FB 0%, #D5E3F4 100%);
    color: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.culture-card:hover .culture-icon {
    background: var(--accent);
    color: #fff;
}

.culture-card h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

.culture-card p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.75;
}

/* ===== 发展历程 ===== */
.timeline {
    position: relative;
    max-width: 920px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: linear-gradient(180deg, var(--border-color) 0%, var(--accent) 50%, var(--border-color) 100%);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 18px 40px;
    box-sizing: border-box;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: 60px;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
    padding-left: 60px;
}

.timeline-year {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    padding: 4px 16px;
    border-radius: 100px;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.timeline-content {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 18px 22px;
    box-shadow: var(--shadow-sm);
}

.timeline-content h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.timeline-content p {
    color: var(--text-gray);
    font-size: 13.5px;
    line-height: 1.7;
}

.timeline-item::before {
    content: "";
    position: absolute;
    top: 30px;
    width: 14px;
    height: 14px;
    background: #fff;
    border: 3px solid var(--accent);
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(odd)::before {
    right: -7px;
}

.timeline-item:nth-child(even)::before {
    left: -7px;
}

/* ===== 资质荣誉 ===== */
.partners-section {
    background: var(--bg-white);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.cert-item {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 28px 16px;
    text-align: center;
    transition: var(--transition);
}

.cert-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.cert-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 14px;
    color: var(--accent);
    background: linear-gradient(135deg, #EAF2FB 0%, #D5E3F4 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-item:hover .cert-icon {
    background: var(--accent);
    color: #fff;
}

.cert-item p {
    font-size: 13px;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.5;
}

/* ===== 新闻资讯 ===== */
.news-section {
    background: var(--bg-section);
}

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

.news-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

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

.news-img {
    position: relative;
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #EAF2FB 0%, #C5D9F0 100%);
    overflow: hidden;
}

.news-img .placeholder-pattern {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(45deg, transparent 48%, rgba(15, 44, 90, 0.05) 49%, rgba(15, 44, 90, 0.05) 51%, transparent 52%) 0 0 / 20px 20px;
    opacity: 0.5;
}

.news-img .icon-mark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: #fff;
    border: 2px solid var(--accent);
    border-radius: 14px;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.15);
}

.news-date {
    position: absolute;
    bottom: 14px;
    right: 14px;
    background: rgba(15, 44, 90, 0.9);
    color: #fff;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.5px;
    backdrop-filter: blur(4px);
}

.news-content {
    padding: 22px 24px 26px;
}

.news-content h3 {
    font-size: 16.5px;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.3s ease;
}

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

.news-content p {
    color: var(--text-gray);
    font-size: 13.5px;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-content .more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 12px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
}

/* ===== 内页 Banner ===== */
.page-banner {
    margin-top: var(--header-h);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 80px 0 60px;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(45deg, transparent 49%, rgba(255, 255, 255, 0.04) 50%, transparent 51%) 0 0 / 30px 30px;
    pointer-events: none;
}

.page-banner::after {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.page-banner-content {
    position: relative;
    z-index: 1;
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
}

.page-banner h1 {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.breadcrumb {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
    color: #fff;
}

/* ===== 产品筛选 ===== */
.product-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 50px;
    padding: 8px;
    background: #fff;
    border-radius: 100px;
    border: 1px solid var(--border-color);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-sm);
}

.filter-btn {
    padding: 10px 22px;
    font-size: 14px;
    color: var(--text-dark);
    border-radius: 100px;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn:hover {
    color: var(--accent);
    background: var(--bg-section);
}

.filter-btn.active {
    background: var(--accent);
    color: #fff;
}

/* ===== 联系我们 ===== */
.contact-section {
    background: var(--bg-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 50px;
}

.contact-info h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.contact-info > p {
    color: var(--text-gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 22px;
    background: var(--bg-section);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
}

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

.contact-item .icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.contact-item p {
    color: var(--primary);
    font-weight: 500;
    font-size: 15px;
    line-height: 1.5;
}

.contact-form {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-md);
}

.contact-form h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.contact-form > p {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-dark);
    background: #fff;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    min-height: 110px;
    resize: vertical;
}

/* ===== 地图区 ===== */
.map-section {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 360px;
    position: relative;
}

.map-grid-bg {
    position: absolute;
    inset: 0;
    background: var(--bg-section);
    background-image:
        linear-gradient(rgba(15, 44, 90, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 44, 90, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
}

.map-roads {
    position: absolute;
    inset: 0;
}

.map-roads .road {
    position: absolute;
    background: rgba(15, 44, 90, 0.08);
}

.map-roads .road-h1 {
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    transform: translateY(-50%);
}

.map-roads .road-v1 {
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    transform: translateX(-50%);
}

.map-roads .road-h2 {
    top: 30%;
    left: 0;
    right: 0;
    height: 2px;
}

.map-roads .road-h3 {
    top: 70%;
    left: 0;
    right: 0;
    height: 2px;
}

.map-pin {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.map-pin .pin-dot {
    width: 14px;
    height: 14px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.2), 0 0 0 18px rgba(37, 99, 235, 0.08);
    margin: 0 auto;
}

.map-pin .pin-label {
    margin-top: 14px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent);
    border-radius: 6px;
    padding: 10px 16px;
    box-shadow: var(--shadow-md);
    white-space: nowrap;
    text-align: left;
}

.map-pin .pin-label .title {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.map-pin .pin-label .addr {
    font-size: 12px;
    color: var(--text-gray);
    margin-top: 2px;
}

.map-compass {
    position: absolute;
    top: 20px;
    left: 20px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 12px;
    color: var(--text-gray);
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--shadow-sm);
}

.map-compass::before {
    content: "↑";
    color: var(--accent);
    font-weight: 700;
    font-size: 14px;
}

.travel-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.travel-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition);
}

.travel-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.travel-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 8px;
}

.travel-card p {
    color: var(--text-gray);
    font-size: 13px;
    line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(45deg, transparent 49%, rgba(255, 255, 255, 0.03) 50%, transparent 51%) 0 0 / 40px 40px;
}

.cta-section h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
    letter-spacing: -0.5px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

.cta-section .btn-primary {
    background: #fff;
    color: var(--primary);
    position: relative;
    z-index: 1;
}

.cta-section .btn-primary:hover {
    background: var(--bg-section);
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 50px;
}

.pagination button {
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-dark);
    font-size: 14px;
    transition: var(--transition);
}

.pagination button:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.pagination button.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.8fr 1.1fr;
    gap: 50px;
    padding-bottom: 50px;
}

.footer-col h3 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 22px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h3::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
}

.footer-col p {
    font-size: 13.5px;
    line-height: 1.8;
    margin-bottom: 12px;
}

.footer-col .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
}

.footer-col .brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    border-radius: 6px;
    font-size: 18px;
}

.footer-col .brand-text {
    color: #fff;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 1px;
}

.footer-col .slogan {
    color: var(--accent-light);
    font-size: 12px;
    letter-spacing: 2px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13.5px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
}

.footer-col ul li a::before {
    content: "›";
    margin-right: 6px;
    color: var(--accent);
    opacity: 0;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-col ul li a:hover::before {
    opacity: 1;
}

.footer-contact-item {
    display: flex;
    gap: 12px;
    margin-bottom: 14px;
    align-items: flex-start;
    font-size: 13.5px;
    line-height: 1.6;
}

.footer-contact-item .ic {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-light);
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 22px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
    margin: 0 4px;
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-bottom .icp-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    background: var(--accent);
    color: #fff;
    border-radius: 3px;
    font-size: 10px;
    line-height: 16px;
    text-align: center;
    margin-right: 4px;
    vertical-align: -2px;
    font-weight: 700;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    cursor: pointer;
}

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

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

/* ===== 动画 ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .nav-menu {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .hero {
        height: auto;
        padding: 60px 0;
    }
    .hero h1 {
        font-size: 32px;
    }
    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }
    .hero-stat .number {
        font-size: 28px;
    }
    .product-grid,
    .news-grid,
    .culture-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .adv-grid,
    .industry-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cert-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    .timeline::before {
        left: 24px;
    }
    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        width: 100%;
        left: 0;
        text-align: left;
        padding-left: 60px;
        padding-right: 16px;
    }
    .timeline-item:nth-child(odd)::before,
    .timeline-item:nth-child(even)::before {
        left: 17px;
        right: auto;
    }
    .section {
        padding: 60px 0;
    }
    .section-title h2 {
        font-size: 26px;
    }
}

@media (max-width: 600px) {
    .adv-grid,
    .industry-grid,
    .stats-grid,
    .cert-grid,
    .footer-grid,
    .travel-grid {
        grid-template-columns: 1fr;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .hero-buttons .btn {
        width: 100%;
    }
    .container {
        padding: 0 16px;
    }
    .page-banner {
        padding: 50px 0 40px;
    }
    .page-banner h1 {
        font-size: 28px;
    }
    .section-title h2 {
        font-size: 22px;
    }
    .contact-form {
        padding: 24px;
    }
    .filter-btn {
        padding: 8px 14px;
        font-size: 13px;
    }
}